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Mod-08 Lec-28 DC link current and DC capacitor current in a voltage source inverter
 
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Pulse width Modulation for Power Electronic Converters by Dr. G. Narayanan,Department of Electrical Engineering,IISc Bangalore.For more details on NPTEL visit http://nptel.ac.in
Views: 14121 nptelhrd
Power Tip 21: Watch that capacitor RMS ripple current rating
 
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In this Power Tip Robert Kollman discusses a mistake designers make often and that is putting too much ripple current into a capacitor that may shorten its lifetime.
Views: 5573 Texas Instruments
How to Reduce DC-DC Converter Output Ripple
 
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Steve Butler, V.P. of Engineering at VPT, discusses the definition and causes of common mode and differential mode output ripple and simple, effective ways to control output ripple. http://www.vptpower.com/ See all of VPT's videos on technical issues for incorporating DC-DC power converters, EMI filters, and other power products into your avionics, military, or other high reliability power system: http://www.vptpower.com/video/
Views: 87334 VPT Tech Videos
Why capacitors need reforming | Ask Al presented by Quad Plus
 
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Many AC drives and other inverter types (i.e., solar) contain aluminum electrolytic capacitors for DC bus filtering. If these capacitors have been in storage for a period of time, for example, in your spares, they may explode if reforming is not performed BEFORE applying full power. Quad Plus explains the capacitor mechanics and how you can prevent explosions. Need help? Check out our repair services at https://quadplus.com/repair-and-field-service.
Views: 2743 Quad Plus
DC Bus voltage ripple
 
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voltage.
Views: 661 davidtsuinw
SIEMENS VFD G120P WITH BOP-2  PROGRAMMING & TESTING
 
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A Variable Frequency Drive (VFD) is a type of motor controller that drives an electric motor by varying the frequency and voltage supplied to the electric motor. Other names for a VFD are variable speed drive, adjustable speed drive, adjustable frequency drive, AC drive, microdrive, and inverter. Frequency (or hertz) is directly related to the motor’s speed (RPMs). In other words, the faster the frequency, the faster the RPMs go. If an application does not require an electric motor to run at full speed, the VFD can be used to ramp down the frequency and voltage to meet the requirements of the electric motor’s load. As the application’s motor speed requirements change, the VFD can simply turn up or down the motor speed to meet the speed requirement. The first stage of a Variable Frequency AC Drive, or VFD, is the Converter. The converter is comprised of six diodes, which are similar to check valves used in plumbing systems. They allow current to flow in only one direction; the direction shown by the arrow in the diode symbol. For example, whenever A-phase voltage (voltage is similar to pressure in plumbing systems) is more positive than B or C phase voltages, then that diode will open and allow current to flow. When B-phase becomes more positive than A-phase, then the B-phase diode will open and the A-phase diode will close. The same is true for the 3 diodes on the negative side of the bus. Thus, we get six current “pulses” as each diode opens and closes. This is called a “six-pulse VFD”, which is the standard configuration for current Variable Frequency Drives.Let us assume that the drive is operating on a 480V power system. The 480V rating is “rms” or root-mean-squared. The peaks on a 480V system are 679V. As you can see, the VFD dc bus has a dc voltage with an AC ripple. The voltage runs between approximately 580V and 680V.We can get rid of the AC ripple on the DC bus by adding a capacitor. A capacitor operates in a similar fashion to a reservoir or accumulator in a plumbing system. This capacitor absorbs the ac ripple and delivers a smooth dc voltage. The AC ripple on the DC bus is typically less than 3 Volts. Thus, the voltage on the DC bus becomes “approximately” 650VDC. The actual voltage will depend on the voltage level of the AC line feeding the drive, the level of voltage unbalance on the power system, the motor load, the impedance of the power system, and any reactors or harmonic filters on the drive. The diode bridge converter that converts AC-to-DC, is sometimes just referred to as a converter. The converter that converts the dc back to ac is also a converter, but to distinguish it from the diode converter, it is usually referred to as an “inverter”. It has become common in the industry to refer to any DC-to-AC converter as an inverter.When we close one of the top switches in the inverter, that phase of the motor is connected to the positive dc bus and the voltage on that phase becomes positive. When we close one of the bottom switches in the converter, that phase is connected to the negative dc bus and becomes negative. Thus, we can make any phase on the motor become positive or negative at will and can thus generate any frequency that we want. So, we can make any phase be positive, negative, or zero.
Views: 11512 Learn Tech
EEVblog #486 - Does Current Flow Through A Capacitor?
 
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Dave proves he has no fear by opening this can of electronic worms by posing the question - "Does Current Flow Through A Capacitor?" The answer may surprise you, or drive you into a physics induced rage... Turns out you can measure the displacement current: http://personal.rhul.ac.uk/uhap/027/PH2420/PH2420_files/displacement.pdf NOTE: before commenting, please watch and understand that there are TWO types of currents. Vent your rage here: http://www.eevblog.com/forum/blog/eevblog-486-does-current-flow-through-a-capacitor/ Thanks to KedasProbe for pointing out this doco video on Maxwell & the Displacement current!: http://www.youtube.com/watch?v=VdoL8IOwJw0 EEVblog Main Web Site: http://www.eevblog.com EEVblog Amazon Store: http://astore.amazon.com/eevblogstore-20 Donations: http://www.eevblog.com/donations/ Projects: http://www.eevblog.com/projects/ Electronics Info Wiki: http://www.eevblog.com/wiki/
Views: 346459 EEVblog
EEVblog #594 - How To Measure Power Supply Ripple & Noise
 
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Fundamentals Friday Dave explains what the ripple and noise specifications on a power supply is and how to measure it using different methods on both analog and digital oscilloscopes. From bad techniques through to good, showing the effect of each one. Traps for young players aplenty in this one. How do you detect common mode noise issues and ensure that the signal you are measuring is really coming from your device under test? Single ended & differential measurement, DIY coax solutions, termination, analog vs digital oscilloscopes, bandwidth limiting, and even oscilloscope probe coax construction issues. It's all here. Mysteries of X1 oscilloscope probes revealed: http://www.youtube.com/watch?v=OiAmER1OJh4 How to track down common mode noise: http://www.youtube.com/watch?v=BFLZm4LbzQU Opamp Noise voltage tutorial: https://www.youtube.com/watch?v=Y0jkPLuFdnM Forum: http://www.eevblog.com/forum/blog/eevblog-594-how-to-measure-power-supply-ripple-noise/ EEVblog Main Web Site: http://www.eevblog.com EEVblog Amazon Store: http://astore.amazon.com/eevblogstore-20 Donations: http://www.eevblog.com/donations/ Projects: http://www.eevblog.com/projects/ Electronics Info Wiki: http://www.eevblog.com/wiki/
Views: 180346 EEVblog
How To Choose The Right Rectifier & Capacitor For Rectifing AC to DC
 
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(Please read calculation examples below) In this video I discuss how to choose the right size & spec'd full bridge rectifier & electrolytic capacitor. In the interests of avoiding confusing calculations please carefully study the below examples. Note in "Example 2" how the results = 200 this could easily be mistaken for 200uf. However, it is infact 200,000uf Example 1: 10 amps x 8.3ms / 5.5volts = 15.0909 (15,0909uf) Example 2: 10amps x 10ms /0.5volts = 200 (200,000uf) - Schematix -
Views: 65275 Schematix
EEVblog #626 - Ceramic Capacitor Voltage Dependency
 
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Dave explains, shows, and measures a potentially big trap with using high value ceramic capacitors. Is your 10uF capacitor really 10uF in your circuit? You might be shocked! Those humble X7R caps you think are a "stable" dielectric? think again... Class II and above ceramic capacitors can vary their capacitance drastically with DC bias voltage level and also the applied AC voltage. Links: http://www.murataamericas.com/murata/murata.nsf/promo_dcbias.pdf http://www.avx.com/docs/masterpubs/mccc.pdf http://www.ece.ucdavis.edu/vcl/asap/asap_v1/docs/X7R_C.pdf http://psearch.murata.com/capacitor/product/GRM21BR60J106KE19%23.html http://www.murata.com/products/design_support/simsurfing/outline.html http://www.avx.com/SpiApps Capacitor Tutorial - Ceramics & Impedance https://www.youtube.com/watch?v=TDDoi70cxw0 The piezoelectric effect demonstrated: https://www.youtube.com/watch?v=KFCRB4d991E Forum: http://www.eevblog.com/forum/blog/eevblog-626-ceramic-capacitor-voltage-dependency-download/ EEVblog Main Web Site: http://www.eevblog.com EEVblog Amazon Store: http://astore.amazon.com/eevblogstore-20 Donations: http://www.eevblog.com/donations/ Projects: http://www.eevblog.com/projects/ Electronics Info Wiki: http://www.eevblog.com/wiki/
Views: 64923 EEVblog
DC Voltage Measurement using Oscilloscope
 
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When DMM (Digital Multi-Meter) or voltmeter is not available, the oscilloscope can be used for measuring DC voltage. Even after calibration and warm-up of the device, there may be a DC offset. Instead of using the builtin measurements, the cursor may be more accurate for measurement. Note for limits of the device which may cause damage of the oscilloscope and injury, so work within the specs of the device.
Views: 31994 ShellWave
Calculation of Ripple Factor and Ripple Voltage for Half wave Rectifier and Full wave Rectifier
 
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In this video, the ripple voltage and the ripple factor for half wave and full wave rectifier have been calculated. By watching this video, you will learn the following topics: 0:40 Calculation of Ripple factor for half wave rectifier 3:28 Calculation of Ripple factor for Full wave rectifier 5:30 Calculation of ripple voltage and ripple factor for Half wave rectifier (with RC filter) 16:39 Calculation of ripple voltage and ripple factor for Full wave rectifier (with RC filter) Ripple factor of Half-wave Rectifier = 1.21 Ripple factor of Full-wave Rectifier = 0.483 Peak to Peak ripple voltage of Half wave rectifier (with RC filter) = Vm / R*f*C Peak to Peak ripple voltage of Full wave rectifier (with RC filter)= Vm / 2*R*f*C Ripple factor of Half-wave Rectifier (with RC filter) = 1/(2√3*R*f*C) Ripple factor of Full-wave Rectifier (with RC filter) = 1/(4√3*R*f*C) The link for the other useful videos related to Rectifiers: 1) Full wave Rectifier: https://youtu.be/74QrYyYsftY 2) Half-Wave Rectifier: https://youtu.be/Ll0IOk_Ltfc 3) How to solve the diode circuits: https://youtu.be/jkEVGQ2lneI 4) RMS and Average Value of Half wave and Full wave rectifier: https://youtu.be/A2SMI31EgMA This video will be helpful to all the students of science and engineering in learning, how to calculate the Ripple factor and Ripple voltage of half wave and full-wave rectifier. #HalfWaveRectifier #FullWaveRectifier #RippleFactor #RippleVoltage Follow me on YouTube: https://www.youtube.com/allaboutelectronics Follow me on Facebook: https://www.facebook.com/ALLABOUTELECRONICS/ Follow me on Instagram: https://www.instagram.com/all_about.electronics/ Music Credit: http://www.bensound.com/
Views: 14084 ALL ABOUT ELECTRONICS
How to Test an Alternator  ( Testing the Voltage Regulator, Diode rectifier and Stator)
 
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This video will cover the following ------------------------------------------------------- How to test an alternator using multi meter How to replace an alternator How to diagnose alternator charging issues Alternator ripple test How to test a voltage regulator in an alternator How to replace bearing in an alternator ( Alternator brush replacement ) how to test a rectifier in an alternator How to test diodes pack in an alternator How ecu controlled / computer controlled alternators work How to test drive belts in a car How to replace a decoupler pulley Diagnosing no charge , undercharging , overcharging alternator with multimeter How to fix a rattling alternator How to test fuses and relays How to test alternator duty cycle How PWM ( pulse width modulation basics ) works How to read waveforms why your battery light is on How to find a voltage drop how to use a multimeter How to find a overnight parasitic battery drain How to repair an alternator and finally Deciding on brand new vs remanufactured Featuring - Toyota camry / aurion / corolla / daihatsu cuore / mitsubishi lancer Silicone Paste https://amzn.to/2yfil3d Digital Multimeter https://amzn.to/2ye7aYx Automotive Relay Tester https://amzn.to/2OzmOIb PicoScope PP923 Standard Automotive Kit https://amzn.to/2DVAnNV Pocket-Sized Digital Storage Oscilloscope https://amzn.to/2OuRZVh Alternator Decoupler Pulley Tool Kit https://amzn.to/2ICBUaC 17mm hex socket https://amzn.to/2xYiZme Impact wrench https://amzn.to/2DUagag https://amzn.to/2NmGjiH https://amzn.to/2OzCcV2 Impact wrench ( high torque) https://amzn.to/2IE2YGq https://amzn.to/2DXvPXA Breaker Bar https://amzn.to/2OA5aE9 WD-40 https://amzn.to/2IDkTgj Autel MaxiDAS DS808 https://amzn.to/2O5tr5F haynes repair manual https://www.amazon.com/gp/search/ref=as_li_qf_sp_sr_il_tl?ie=UTF8&tag=junkydiyguy-20&keywords=haynes repair manual&index=aps&camp=1789&creative=9325&linkCode=xm2&linkId=cf0c7c2967e4dc41f52250c37fe30079 test light https://amzn.to/2DVdYjO Power Probe III https://amzn.to/2yexzWf Best Jump starter i've ever used https://amzn.to/2qWpFgV Music: Ahrix – Nova Spotify: https://open.spotify.com/artist/0kXCdaJ7C5MD27jXxzvHsa Facebook: http://bit.ly/1wFWvyM Youtube Channel: http://bit.ly/2mUBTD2 Youtube Video: http://bit.ly/1eXqiOi SoundCloud: http://bit.ly/1m1ye0b And don't forget to follow me on Instagram for more updates https://www.instagram.com/junkydiyguy/
Views: 961943 Junky DIY guy
-+ MKP-L0(DC supporting capacitor)
 
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Structure: the products are made of temperature-resistant metalized polypropylene film, plastic and aluminum box, and enveloped with flame-resistant epoxy resin, welded by copper screw bolt. Features: low loss, high insulation resistance, good self-healing character, low equivalent resistance, good ripple current capability, long lifespan. Application: Widely used in DC-Link circuit for filter, energy storage; Replace electrolytic capacitors, better performance and long life; Wind power, photovoltaic inverter, electric vehicles and hybrid vehicles, welding equipment power supplies, SAG, and induction heating equipment for the DC link filter.
Views: 164 Linda Feng
Making Output Ripple Measurements on a DC output
 
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Learn more about performing and output ripple measurement on the DC output of a power supply using a Keysight InfiniiVision X-Series oscilloscope. Click to subscibe! ► http://bit.ly/Scopes_Sub Visit www.keysight.com/find/scopes-power
Views: 18662 Keysight Labs
Capacitor Filter || Full Wave Bridge Rectifier Using Centre Tapped Transformer | AC to DC converter
 
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This video how to build (AC to DC) full wave rectifier using a center tapped transformer and using two capacitors acts as the filter. input voltage(12v-0-12v) converts into the pure DC output voltage. ---------------------------------------------------------------------- the component is used:- 1) PN junction diode 1N4007 (4) 2) 1000uF/25v capacitor ( recommend above 25v and 1000uF) 3) Centre tapped transformer 12v -0- 12v -------------------------------------------------------------------- Click the link see the more videos on the playlist 1)Monitoring & controlling project circuits - https://goo.gl/UUT2CG 2) Inverter circuits - https://goo.gl/xz33Uu 3) Chaser LED lights circuits - https://goo.gl/5aRnU4 4) DC Power supply circuits - https://goo.gl/yt4fuP 5) Remote control circuit - https://goo.gl/rJzx1d 6) LED based circuits - https://goo.gl/pga5qh 7) Relay based circuit - https://goo.gl/Q4r7XM 8) PIC Microcontroller project - https://goo.gl/9tNaVm 9) Relay based circuit - https://goo.gl/J4u8BD 10) Battery controller circuits - https://goo.gl/YVHokC 11) Repair works - https://goo.gl/11uPxn ------------------------------------------------------------------------------------------------- buy this material to following link 1) 433Mhz RF Wireless Transmitter Receiver Module = https://goo.gl/ZntXYr 2) 10W mini White High Power LED SMD Bead Chips = https://goo.gl/NFBtTV 3) 12V DC Battery Eliminator Power Supply transformer-1 Amp = https://goo.gl/nBE6P3 4) LED driver AC TO DC 12V CONVERTER = https://goo.gl/NMf1Vh 5) 555 Timer Ic = https://goo.gl/ZPB1Zt 6) 1W High Power Led Lamp 110-120Lm Leds = https://goo.gl/3NuufG 7) 12 Volt DC Motor (Multipurpose Brushed Motor For DIY Applications PCB Drill) = https://goo.gl/RVHTQK 8) DC 12v gear motor = https://goo.gl/M3yqZL 9) Electric Hand Drill PCB Press Drilling 12V Motor, 12000 RPM, 10 Pcs 0.3-3.0 mm Drill Bits Set, Keyless Brass Chucks and Hi Watt Battery = https://goo.gl/7qUf9m 10) 12V PCB MOUNT SUGAR CUBE RELAY = https://goo.gl/m1pbD9
Views: 116586 POWER GEN
Inductive spiking, and how to fix it!
 
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A description of inductive spiking, why it happens, and how a diode can save your circuits. Make sure you enable annotations as there is an error in one of the diagrams. Example diodes on Amazon: http://www.amazon.com/exec/obidos/ASIN/B00W17LOBO/afromods-20 Check out my webpage for more handy electronics tutorials http://www.afrotechmods.com
Views: 349594 Afrotechmods
HLK-PM01 power supply module - test (load, ripple), review
 
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Testing the Hi-Link HLK-PM01 5V 600mA 3W power supply module - load (max current), ripple and safety test. Dummy load & battery analyzer circuit diagram: http://tefatronix.g6.cz/display.php?page=batmeter&lang=en https://www.facebook.com/tefatronix
Views: 17234 TefaTronix
How to protect circuits from reversed voltage polarity!
 
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How to use diodes, schottky diodes and P-FETs to protect your circuits from reversed voltage/power connections. Website: http://www.afrotechmods.com/
Views: 1084225 Afrotechmods
find out a choke coil for a DC power supply on 50/60 Hz or other freq. (basics)
 
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MORE INFO&LINKS IN THIS TEXTBOX. WARNING: some oscilloscopes can NOT handle 300 Volt at their input. These scopes will immediately be defective! So read the manual from your oscilloscope to find out the maximum input voltage on the probe! When it is low, use a voltage divider at the output from the circuit (1 M- 10K) and connect the probe from the scope at the node -low voltage point- from the voltage divider). This video (somewhat too long, sorry, I repeat myself too much) shows how you can find out a choke coil in a PI filter configuration that damps out the 50 Hz or 60 Hz from the standard mains supply in Europe, US, elsewhere. Value from 50 uF relates to 50 Hz or 60 Hz systems. Succes in a real/concrete situation depends on experiments (!) with old /unused/thrownaway ferrite core coils or old transformers (iron lamellae cores) in the 10 Watt range made for 110 V or 230 V 50 Hz or 60 Hz AC.With simple resources, e.g. the old AC 230V- 110 V AC transformers, self-wound coils on a ferrite rod, old computer power supply filter coils, etc, can be used . You must find it all out (oscilloscope absolutely necessary). With the oscillator you can get an indication about the healthyness and usefulness of old (ferrite core or not) coils. NEVER connect your oscilloscope directly to 100 - 300 V or more (!!). Keep in mind that on power supplies on higher frequencies (40 KHz - 400 KHz) the choke coil and the caps from the Pi filter have to be adapted to the high frequency. In that case no electrolytic capacitors must be used but only non polar plastic caps or ceramic caps (low HF loss). More circuits in my books on the Lulu website, author Ko Tilman, or on the internet. The video that I refer to in this video is: "test oscillator for coils 30 mH-3,6 uH (0,9uH) (e.g.25 KHz-1,2 MHz" published 10 october 2014 BUT (!) Better/also usable are: 1. "FET test oscillator sine wave with very good linearity (200 KHz - 9 MHz)" published 3 october 2015 2. "Device to test radio coils on resonance, optimum frequency and quality" published 25 october 2015. Both circuits are usable. The oscillator published on 25 october 2015 is somewhat more sophisticated (has a broader frequency band, especially on lower frequencies, say 35 KHz - 200 KHz). LINKS TO HUM FREE POWER SUPPLIES FOR AUDIO (+ related subjects) Decoupling & hum free (silent) audio amplifiers https://youtu.be/0SoD3GlFH0s How to make a good analog audio transistor pre amp, version 1 https://youtu.be/luBmY8SzGh0 Audio signals transported over long wires https://youtu.be/ldtEAlsCXMw The transistor series voltage regulator practice (IMPORTANT) https://youtu.be/YL41FPH_H-s How to make a small mini audio set (1-2 Watt) pt 2-1 https://youtu.be/ZMXUip3i1zY How to make a small mini audio set (1-2 Watt) pt 2-2 https://youtu.be/4Lqjw9rbzJA Find out a choke coil for a DC power supply https://youtu.be/dn-CDTy7cg4 Tips to make a High Voltage (120V-50mA) hum free power supply https://youtu.be/d71voqjK0Q4 Prevent hum in homebrew audio amplifiers https://youtu.be/IsLEyx3nU9o How to test a power supply https://youtu.be/BeNoSmm3D_4 Developing a 6 Watt stereo audio amp. Part 1 (e.v.) https://youtu.be/DRjn7Al-wdc O-34 V-2A power supply (IMPORTANT) https://youtu.be/-hXvM1svcdY How to make a bridge (full wave) rectifier with 4 diodes https://youtu.be/6E8rULhY-1k
Views: 31199 radiofun232
Passive RC low pass filter tutorial!
 
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A tutorial on passive low pass RC filter circuits, and how they affect the frequency content of signals. An example of an RC filter that could go before a subwoofer's amplifier is given. The sound clips are from Pendulum's Slam in Hold Your Colour. More videos at http://www.afrotechmods.com
Views: 614313 Afrotechmods
Measure and Improve the Output Ripple of a DC DC Converter
 
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How to measure the output ripple as well as improving filter methods for the ouput of a dc dc converter. Improve the output filtering with this video from Vicor Corporation. Learn the theory behind it and a step-by-step bench demonstration measuring output ripple. Be sure to subscribe to Vicor Corporation's channel for more videos. More videos on this topic are available on our DC- DC Converters playlist https://www.youtube.com/playlist?list=PLOFm1WdHpufBnZXwjxSU2qGSs5r_uEhav Visit us at: http://www.vicorpower.com/"
Views: 6393 Vicor Corporation
CRC Film capcitor --- DC link capacitor FT
 
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DC Link Capacitor MKP-FT Series Voltage Range: 400~1100V.DC Capacitance Range: 10~200μF Applications: Widely used in power electronic circuits for coupling, high frequency filtering, and decoupling.
Views: 18 LWN Frida
Mod-03 Lec-25 Electrolytic capacitor reliability and lifetime
 
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Power Electronics and Distributed Generation by Dr. Vinod John,Department of Electrical Engineering,IISc Bangalore.For more details on NPTEL visit http://nptel.ac.in
Views: 1296 nptelhrd
Panasonic Hybrid Capacitors Provide a Low ESR with a Higher Withstanding Voltage
 
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http://www.futureelectronics.com/en/Search.aspx?dsNav=Ny:True,Ro:0,Nea:True,N:454-4294938236 Typical Polymer Capacitors have an excellent equivalent series resistance or ESR. However, due to the nature of the Polymer raw material the voltage rating of this style of capacitor can only go as high as 80V DC. In comparison, a conventional electrolytic capacitors can handle higher voltages and has a larger charge capacity. However, the ESR characteristics are inferior to a Polymer Capacitor. Hybrid Capacitors utilize a combination of liquid aluminum electrolyte and polymer as a dielectric material, providing a best of both worlds approach and creating a superior capacitor. The polymer contributes to a low ESR while the liquid aluminum electrolyte allows for a higher capacitance, higher withstanding voltage and a longer lifetime. Hybrid capacitors provide a tighter control over DC leakage current as compared to electrolytic capacitors. Also, a hybrid capacitor opens upon failure where a polymer capacitor short circuits on failure. Due to its enhanced ESR and ripple current handling capabilities hybrid capacitors are useful in applications that require high frequency switching at higher voltages. One hybrid capacitor can be used to replace multiple conventional surface mount electrolytic capacitors, thus saving space on your circuit board. http://www.futureelectronics.com/en/Search.aspx?dsNav=Ny:True,Ro:0,Nea:True,N:436-4294938236 Hybrid capacitors have excellent temperature characteristics and a high mean time to failure, making them especially useful in industrial applications where durability is paramount. Typical applications include automotive ECUs, motor drives, security cameras and LED lighting. For more information on Panasonic’s hybrid capacitors visit their website.
Views: 22608 Future Electronics
Three phase three level flying capacitor inverter
 
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Paper title: Dc-link current and voltage harmonics in three-phase three-level flying capacitor inverters with sinusoidal carrier based PWM authors names: Manel Hammami, Marija Vujacic, Gabriele Grandi affiliation: Dept. of Electrical, Electronic and Information Engineering Alma Mater Studiorum – University of Bologna, Italy Paper abstract: This paper concerns with the analysis and calcula­tion of the low-frequency dc-link input current and voltage ripple har­monic components in three-phase three-level flying capacitor in­verter topologies. As a first simplified approach, reference is made to si­nusoidal carrier-based PWM, and sinusoidal load cur­rents with unity power factor, well representing most of the grid-connected applications. The proposed method can be straight­forwardly ex­tended to centered PWM with any output power fac­tor angle. Based on the ripple requirements of dc-link voltage, an original simple and effective equation for designing the dc-link capacitor has been proposed, since design guidelines only for the flying ca­pacitors are reported in literature. Numerical simula­tions have been carried out by Matlab/Simulink in order to verify the pro­posed developments.
Mod-02 Lec-07 Applications of voltage source converter -- II
 
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Pulse width Modulation for Power Electronic Converters by Dr. G. Narayanan,Department of Electrical Engineering,IISc Bangalore.For more details on NPTEL visit http://nptel.ac.in
Views: 8015 nptelhrd
Mod-07 Lec-25 Evaluation of RMS line current ripple using the notion of stator flux ripple
 
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Pulse width Modulation for Power Electronic Converters by Dr. G. Narayanan,Department of Electrical Engineering,IISc Bangalore.For more details on NPTEL visit http://nptel.ac.in
Views: 2571 nptelhrd
Mod-08 Lec-27 Instantaneous and average dc link current in a voltage source inverter
 
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Pulse width Modulation for Power Electronic Converters by Dr. G. Narayanan,Department of Electrical Engineering,IISc Bangalore.For more details on NPTEL visit http://nptel.ac.in
Views: 4405 nptelhrd
СУПЕР лабораторник, 20A50V+тест
 
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Сердце прибора: https://ru.aliexpress.com/item/RD-DPS5020-Constant-Voltage-current-Step-down-communication-digital-Power-Supply-buck-Voltage-converter-LCD-voltmeter/32821185351.html?aff_platform=link-c-tool&cpt=1525211028733&sk=E276Qnm&aff_trace_key=508d1d7be218494c894a9ba83526d881-1525211028733-00493-E276Qnm&terminal_id=0e5b0a56373d48528ed3a3e073e98b5d Конденсаторы: https://ru.aliexpress.com/item/Free-shipping-80V-22000UF-40-80MM-Electrolytic-capacitor-new-and-original-import-capacitors/32374918824.html?aff_platform=link-c-tool&cpt=1525380633959&sk=E276Qnm&aff_trace_key=6b65d15dc9c0495f95ac0d3e78218c3d-1525380633959-05909-E276Qnm&terminal_id=0e5b0a56373d48528ed3a3e073e98b5d Блок питания: https://ru.aliexpress.com/item/Switching-Power-Supply-DC-60V-20A-1200W-Switching-Switch-Driver-Transformer-220V-AC-DC60V-SMPS-For/32789145735.html?aff_platform=link-c-tool&cpt=1525211056025&sk=E276Qnm&aff_trace_key=dc9eedae452e4ffda31c3d94015bc2c7-1525211056025-02888-E276Qnm&terminal_id=0e5b0a56373d48528ed3a3e073e98b5d Тестер переменки: https://ru.aliexpress.com/item/AC-Voltage-Meters100A-80-260V-Digital-LED-Power-Panel-Meter-Monitor-Power-Energy-Voltmeter-Ammeter-watt/32728149529.html?aff_platform=link-c-tool&cpt=1525211039854&sk=E276Qnm&aff_trace_key=6ace414e79c04c5391fbdb05ff136c0a-1525211039854-07466-E276Qnm&terminal_id=0e5b0a56373d48528ed3a3e073e98b5d Термостат для БЛОКА ПИТАНИЯ: https://ru.aliexpress.com/item/50-110-Degree-W1209-Digital-thermostat-Temperature-Control-Switch-12V-sensor/32444379539.html?aff_platform=link-c-tool&cpt=1525210947522&sk=E276Qnm&aff_trace_key=5c4e0e0ec76f4145aef07e73f3ffa6f1-1525210947522-01134-E276Qnm&terminal_id=0e5b0a56373d48528ed3a3e073e98b5d Многофункциональный тестер: https://ru.aliexpress.com/item/RD-100v-50A-100A-7in1-OLED-Multifunction-Tester-Voltage-current-Time-temperature-capacity-voltmeter-Ammeter-electrical/32788074155.html?aff_platform=link-c-tool&cpt=1525210961595&sk=E276Qnm&aff_trace_key=b541e336c93c4b01adebafbb13affed4-1525210961595-00433-E276Qnm&terminal_id=0e5b0a56373d48528ed3a3e073e98b5d Выходные клеймы напряжения: https://ru.aliexpress.com/item/4pcs-Black-Red-Thread-Gold-Plated-Audio-Speaker-Binding-Post-Banana-Plug-Terminals-56MM/32525321556.html?aff_platform=link-c-tool&cpt=1525210983735&sk=E276Qnm&aff_trace_key=1cf804cdf52a47099c9c1650f4bab60c-1525210983735-06996-E276Qnm&terminal_id=0e5b0a56373d48528ed3a3e073e98b5d Термостат в корпусе, для внутренней температуры: https://ru.aliexpress.com/item/55-120-Degree-Digital-Temperature-Controller-DC-12V-Thermostat-Temperature-Control-Red-And-Blue-Display/32799446118.html?aff_platform=link-c-tool&cpt=1525210985769&sk=E276Qnm&aff_trace_key=3efce0b8eba74648ad50ab52ad9a6174-1525210985769-05116-E276Qnm&terminal_id=0e5b0a56373d48528ed3a3e073e98b5d Розетка: https://ru.aliexpress.com/item/Black-USB-Wall-Socket-AC-110-250V-US-UK-EU-AU-Wall-Socket-2-Port-USB/32783135852.html?aff_platform=link-c-tool&cpt=1525211081094&sk=E276Qnm&aff_trace_key=b4ae887c7db54536872d948536532d49-1525211081094-02394-E276Qnm&terminal_id=0e5b0a56373d48528ed3a3e073e98b5d Разъём прикуривателя: https://ru.aliexpress.com/item/12V-Waterproof-Car-Boat-Motorcycle-Cigarette-Lighter-Socket-Power-Plug-Outlet-Car-Accesories-Heat-Resisting-Plastic/32773047820.html?aff_platform=link-c-tool&cpt=1525211085933&sk=E276Qnm&aff_trace_key=2efdfe8e690f4d5499ef6f3aae01f394-1525211085933-00007-E276Qnm&terminal_id=0e5b0a56373d48528ed3a3e073e98b5d 2 Usb разъёма +тестер: https://ru.aliexpress.com/item/12V-Dual-USB-Motorcycle-Cigarette-Lighter-Car-Charger-Socket-Charger-LED-Digital-Voltmeter-Meter-Monitor-Red/32787668524.html?aff_platform=link-c-tool&cpt=1525211087865&sk=E276Qnm&aff_trace_key=2f1b7e487bc94ea1a755e2c4c19e5544-1525211087865-04094-E276Qnm&terminal_id=0e5b0a56373d48528ed3a3e073e98b5d
Views: 891 Ника Лета
Rectifier Filter - Capacitor Input or 𝝅 Filter
 
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Hello people, welcome to ‘It’s All About Electronics’ you tube channel. Here we will learn all about electronics and do experiments based on our gained knowledge. Electronics is a very vast subject like an ocean. We will not restrict ourselves to learn only some specific topics of this subject, rather than that we will try to learn all the general as well as the advanced topics of this subject. So without any further delay let’s start today’s session. YouTube channel URL → https://www.youtube.com/channel/UCavb... Let’s start today with a very well-known and simple circuit known as Capacitor Input or 𝝅 Filter Circuit for Full Wave Rectifier Circuit Using Diode’. Rectifier is an electronic device which converts the alternating current to unidirectional current, in other words rectifier converts the AC voltage to DC voltage. Rectifier filter is an electronic circuit that removes ripple or unwanted AC signal components from the output of a Rectifier. When we pass pulsating DC (Pulsating DC is a DC signal comprises of unwanted AC component known as ripples. ) through a 𝝅 Filter, it will able to remove ripples from the output and will smooth the output signal. So let’s start with this circuit. First we will understand theoretical aspects of 𝝅 Filter, means we will understand the circuit diagram, do little derivation based on its circuit design and output waveform and then we will do practical session using LTspice. LTspice is the best free simulation software supported by Linear Technology. The download and installation of LTspice is very easy and needs very less time. All required information and Download link of LTspice → http://www.linear.com/designtools/sof... Full Wave Rectifier Using Diode - theoretical and derivation discussion of it's characteristics → https://youtu.be/tYPTuj2gm7E All Rectifier Circuits video link → https://www.youtube.com/playlist?list... https://www.youtube.com/playlist?list=PL-MjlLtlvVRk1y9fgp8ixLe2HOAlzzyiz L Section Filter video link → https://youtu.be/QbwVYHyTdEM So let’s this experiment started.
EEVblog #1208 - Circuit Analysis & Debugging
 
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Fundamentals Friday Dave answers a beginner forum question of why their 74HC390 based breadboard counter circuit does not work properly. Let's get up to our armpits in datasheets and troubleshooting. A two sentence forum response turned into a step-by-step 27min video investigation involving rise and fall times, setup and hold times, metatability, optocouplers, bypassing, open collectors, and breadboard connector traps for young players. Power your chips through power pins: https://www.youtube.com/watch?v=2yFh7Vv0Paw Schmitt Trigger Tutorial: https://www.youtube.com/watch?v=Ht48vv0rQYk Forum: http://www.eevblog.com/forum/blog/eevblog-1208-circuit-analysis-debugging/ #CircuitDesign #Analysis #Debugging Bitcoin Donations: 38y7DE8HEHNj8fGDtUr4PkCn9nWxiorvvy Litecoin: ML7oQokTwB38bgzzjLDbRV97HKAHuwRfHA Ethereum: 0x11AceA38DCA9DbFfB4F35f3F746af65F9dED28ce EEVblog Main Web Site: http://www.eevblog.com The 2nd EEVblog Channel: http://www.youtube.com/EEVblog2 Support the EEVblog through Patreon! http://www.patreon.com/eevblog AliExpress Affiliate: http://s.click.aliexpress.com/e/c2LRpe8g Buy anything through that link and Dave gets a commission at no cost to you. Stuff I recommend: https://kit.com/EEVblog/ Donate With Bitcoin & Other Crypto Currencies! https://www.eevblog.com/crypto-currency/ T-Shirts: http://teespring.com/stores/eevblog Likecoin – Coins for Likes: https://likecoin.pro/@eevblog/dil9/hcq3
Views: 46949 EEVblog
What is ELECTROLYTIC CAPACITOR? What does ELECTROLYTIC CAPACITOR mean?
 
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What is ELECTROLYTIC CAPACITOR? What does ELECTROLYTIC CAPACITOR mean? Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. Electrolytic capacitor is the generic term for three different capacitor family members: 1. Aluminum electrolytic capacitors, 2. Tantalum electrolytic capacitors and 3. Niobium electrolytic capacitors All electrolytic capacitors (e-caps) are polarized capacitors whose anode (+) is made of a particular metal on which an insulating oxide layer forms by anodization, acting as the dielectric of the electrolytic capacitor. A non-solid or solid electrolyte which covers the surface of the oxide layer in principle serves as the second electrode (cathode) (-) of the capacitor. Due to their very thin dielectric oxide layer and enlarged anode surface, electrolytic capacitors have—based on the volume—a much higher capacitance-voltage (CV) product compared to ceramic capacitors or film capacitors, but a much smaller CV value than electrochemical supercapacitors. The large capacitance of electrolytic capacitors makes them particularly suitable for passing or bypassing low-frequency signals up to some mega-hertz and for storing large amounts of energy. They are widely used for decoupling or noise filtering in power supplies and DC link circuits for variable-frequency drives, for coupling signals between amplifier stages, and storing energy as in a flashlamp. Standard electrolytic capacitors are polarized components due to their asymmetrical construction, and may only be operated with a higher voltage (ie, more positive) on the anode than on the cathode at all times. Voltages with reverse polarity, or voltage or ripple current higher than specified (as little as 1 or 1.5 volts may suffice), can destroy the dielectric and thus the capacitor. The destruction of electrolytic capacitors can have catastrophic consequences (explosion, fire). Bipolar electrolytic (aka non-polarized) capacitors which may be operated with either polarity are special constructions with two anodes connected in reverse polarity.
Views: 4519 The Audiopedia
220 V AC to 5 V DC CONVERTER (Regulated) || BTech 1st Year Project || USING LINEAR VOLTAGE REGULATOR
 
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Most of the electronic devices runs on a DC power supply of 5 V or 9. But we get an Alternating Current of around 220 V in our home. So for all practical purposes like charging a phone or running a computer this AC needs to be converted into DC. A rectifier does this work after the desired voltage is reached by stepping the AC down using a transformer. The DC thus obtained is not regulated and are full of ripples. These ripples are filtered using a capacitor or inductor or both. Further using a linear voltage regulating IC we can get a smooth and constant DC output. Watch this video to know how to make the circuits. Download link for the CIRCUIT DIAGRAM : https://drive.google.com/file/d/1aylKa5kvRZIyNkfvu_EiNM92qVXwiopO/view?usp=drivesdk Previous video : https://youtu.be/GqD2GveFL-Q SUBSCRIBE: https://www.youtube.com/TechnoLodgy Lets get social : Catch on FACEBOOK: https://www.facebook.com/tlodgy/ TWITTER: https://twitter.com/techno_lodgy INSTAGRAM: https://www.instagram.com/techno_lodgy/ Catach me on INSTA : https://www.instagram.com/insta_nirmal/
Views: 1038 Techno Lodgy
dc bus inverter
 
01:21
Out Put 375 Vdc
Views: 107 Sompong Tungmepol
Scope Noob: Bridge Rectifier
 
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This video accompanies the second installment of Scope Noob: http://hackaday.com/2014/12/03/scope-noob-bridge-rectifier/ In this clip I probe several signals having to do with a full-wave or "bridge" rectifier. This starts with measuring the AC signal feeding the rectifier. I then show a minor "gotcha" I ran into when trying to measure both the AC input and the DC output at the same time. The video rounds out by adding a smoothing capacitor followed by a linear regulator circuit. I was a bit confused at the end as I thought the smoothed DC signal was at a higher voltage but looking at the screenshots again I was mistaken.
Views: 9918 HACKADAY
DIY Homemade 30watt LED BULB with Transformerless power supply |easy and low cost
 
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DIY Homemade 30watt LED BULB with Transformerless power supply |easy and low cost is very simple to design circuit we need some calculations for ppc capacitor please check below video u can better understand https://youtu.be/y9lbqQiWvk8 some household bulbs like LED bulb in these transformer power supply is use you can also create your own led bulb in easy way ** please like and subscribe** ************All Videos imp files are shared by link these link is only open 5hr so please subscribe and on the notification so u can download files *************** **circuit diagram link is given below** https://drive.google.com/open?id=18Jh... how to use specific capacitor for these power supply you can check below calculation for better understanding X Rated capacitor 400 Volt 225k 400v capacitor The X rated capacitor is designed for 250, 400, 600 VAC. Higher voltage versions are also available. The Effective Impedance (Z), Rectance (X) and the mains frequency (50 – 60 Hz) are the important parameters to be considered while selecting the capacitor. The reactance (X) of the capacitor (C) in the mains frequency (f) can be calculated using the formula: X = 1 / (2 ¶ fC ) For example the reactance of a 0.33µF capacitor running in the mains frequency 50Hz will be: X = 1 / {2 ¶ x 50 x 0.33 x( 1 / 1,000,000) } =9645.75 Ohms 0r 96.6 Kilo ohms. Rectance of the capacitor 0.33 uF is calculated as X = 1/2Pi*f*C Where f is the 50 Hz frequency of mains and C is the value of capacitor in Farads. That is 1 microfarad is 1/1,000,000 farads. Hence 0.33 microfarad is 0.33 x 1/1,000,000 farads. Therefore the rectance of the capacitor appears as 9645.75 Ohms 0r 96.6 Kilo ohms..To get current I divide mains Volt by the rectance in kilo ohm.That is 230 / 96.6 = 23.80 mA. Effective impedance (Z) of the capacitor is determined by taking the load resistance (R) as an important parameter. Impedance can be calculated using the formula: Z = √ R + X Suppose the current in the circuit is I and Mains voltage is V then the equation appears like: I = V / X The final equation thus becomes: I = 230 V / 96.6 = 23.80 mA. Therefore if a 0.33 uF capacitor rated for 230 V is used, it can deliver around 23 mA current to the circuit. But this is not sufficient for many circuits. Therefore it is recommended to use a 470 nF capacitor rated for 400 V for such circuits to give required current. X Rated AC capacitors – 250V, 400V, 680V AC x rated ac capacitors Table showing the X rated capacitor types and the output voltage and current without load capacitor and current Rectification Diodes used for rectification should have sufficient Peak inverse voltage (PIV). The peak inverse voltage is the maximum voltage a diode can withstand when it is reverse biased. 1N4001 diode can withstand up to 50 Volts and 1N4007 has a toleration of 1000 Volts. The important characteristics of general purpose rectifier diodes are given in the table. DC Smoothing A Smoothing Capacitor is used to generate ripple free DC. Smoothing capacitor is also called Filter capacitor and its function is to convert half wave / full wave output of the rectifier into smooth DC The capacitance value determines the amount of ripples that appear in the DC output when the load takes current. Voltage Regulation Zener diode is used to generate a regulated DC output. A Zener diode is designed to operate in the reverse breakdown region. If a silicon diode is reverse biased, a point reached where its reverse current suddenly increases. The value of R can be calculated using the formula: R = Vin – Vz / Iz Where Vin is the input voltage, Vz output voltage and Iz current through the Zener In most circuits, Iz is kept as low as 5mA. If the supply voltage is 18V, the voltage that is to be dropped across R to get 12V output is 6volts. If the maximum Zener current allowed is 100 mA, then R will pass the maximum desired output current plus 5 mA . So the value of R appears as: R = 18 – 12 / 105 mA = 6 / 105 x 1000 = 57 ohms Power rating of the Zener is also an important factor to be considered while selecting the Zener diode. According to the formula P = IV. P is the power in watts, I current in Amps and V, the voltage. So the maximum power dissipation that can be allowed in a Zener is the Zener voltage multiplied by the current flowing through it. For example, if a 12V Zener passes 12 V DC and 100 mA current, its power dissipation will be 1.2 Watts. So a Zener diode rated 1.3W should be used. The drawback of the Capacitor power supply includes No galvanic isolation from Mains.So if the power supply section fails, it can harm the gadget. Low current output. With a Capacitor power supply. Maximum output current available will be 100 mA or less.So it is not ideal to run heavy current inductive loads. Output voltage and current will not be stable if the AC input varies. Caution ****************Thanks for watching************************** see u next video
Views: 2314 YS Yogesh Shende
High power medium voltage DC/DC converter technology for DC wind turbines
 
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My Ph.D. Defence on the topic of high power, medium voltage DC/DC converters took place at Department of Energy Technology, Aalborg University, 3rd.sept.2018. For aprox. 3,5 years I've been investigating different topologies and finally selected a variant of single phase-series resonant converter, entitled SRC# and operated with the so-called "pulse removal technique". The classic SRC has already been proposed for traction and solid state transformers, but for a wind turbine the SRC requires a "means of control", in order to keep constant the input DC-link voltage. From a series of experiments, two medium voltage setups are discussed in the presentation (a proof of concept-10kW,500V /5000V and a soft-switching characterization setup). The proposed topology promises flat efficiency in entire operational range and above 98%, mainly due to soft-switching capability, posibility to design the mega-watt transformer for medium frequency operation and the usage of line frequency-press pack diodes. As soon as the thesis is online, I will add the link to it. Other information can also be accessed on IEEE xplorer: https://ieeexplore.ieee.org/search/searchresult.jsp?newsearch=true&queryText=catalin%20dincan The slides can also be accessed on slideshare.net https://www.slideshare.net/CatalinGabrielDincan/high-power-medium-voltage-dcdc-converter-technology-for-dc-wind-turbines?qid=6a07aa4d-5ffd-4db9-8a3e-02c0852d0cd8&v=&b=&from_search=1
Views: 241 Catalin Dancan
Inductor basics - What is an inductor?
 
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The basics of how inductors work, a demo showing an inductor filtering out high frequency signals, a quick low pass LC filter, and a demo showing the magnetic field created around inductors. Webpage: http://www.afrotechmods.com Twitter: http://twitter.com/Afrotechmods Facebook: http://www.facebook.com/Afrotechmods/
Views: 1474070 Afrotechmods
How to make 5 volt power supply in 5 minutes Easily
 
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In this video, I have designed a simple 5 volt 1 amp DC power supply from AC mains (230V/120V AC) using an LM7805 voltage regulator. After watching this video you can easily make the 5 v power supply within 5 minutes. You can use this 5-volt regulator to supply your Arduino circuit or any 5v USB gadgets. This 5 volt supply can also be used as the mobile charger. In this project, I have not used Heat Sink with LM7805 but I will suggest you use a heat sink with 7805 ic. The whole process of making this 5 v supply is shown in steps so you can easily design this 5v regulator. The required components are: 1. LM7805 regulator 2. 0.1uF Capacitors (2nos) 3. 470uF Capacitor (1 no) 4. Diode 1N4007 (4nos) 5. Step Down Transformer [230/120V - 9V] 6. Connector 7. Connecting wires 8. Zero PCB Working Principle of this 5 v DC source: First, we are using a step-down transformer [Secondary rating 9V and 1 amp] to step down 230V/ 120V AC supply to 9 Volt AC. Then we rectify the 9V AC to 9 V DC using a diode bridge rectifier [Full wave rectifier]. After the rectifier, we have used Capacitors to filter the ripple from the circuit and fed it to the input of LM7805 voltage regulator. LM7805 regulate the 9 volt DC to 5 Volt DC and at the output of 7805 ic, we get constant 5 Volt DC output. To design a 5 volt DC power supply from 9-volt battery please refer the following link: https://youtu.be/9KXN69eXzj8 If you like the video please hit the like button and share it with your friends. For more such videos don't forget to SUBSCRIBE to our channel. Thank you for your Support. Find us on Facebook: https://www.facebook.com/techstudycell/ Other useful videos: How to make Clap Switch & Music Rhythm LED Flashlight circuit without 555 Timer/Electronics Project https://youtu.be/wXORaeun8vA Some Useful Life Hacks of 9 volt battery / Flashlight, Mini Fan & 9 Volt Battery Connector https://youtu.be/rppPbBEFzGM How to make Flashing LED Light for Bike using Transistor https://youtu.be/cXCExzIBNsA How to Test Capacitors with and without Multi-meter. https://youtu.be/NqvL7Cyemiw
Views: 18977 Tech StudyCell
DIY Transformerless power supply, 230Ac To 5volt Dc converter,Simple steps and  low cost
 
04:55
***********YS tech************ HOW to design(make) Transformerless power supply here is design 5v dc /23ma power supply in low cost some household bulbs like LED bulb in these transformer power supply is use you can also create your own led bulb in easy way ** please like and subscribe** ************All Videos imp files are shared by link these link is only open 5hr so please subscribe and on the notification so u can download files *************** **circuit diagram link is given below** https://drive.google.com/open?id=18JhM4dHmby-MVMjQcMRuisL_nYa1hLC2 how to use specific capacitor for these power supply you can check below calculation for better understanding X Rated capacitor 400 Volt 225k 400v capacitor The X rated capacitor is designed for 250, 400, 600 VAC. Higher voltage versions are also available. The Effective Impedance (Z), Rectance (X) and the mains frequency (50 – 60 Hz) are the important parameters to be considered while selecting the capacitor. The reactance (X) of the capacitor (C) in the mains frequency (f) can be calculated using the formula: X = 1 / (2 ¶ fC ) For example the reactance of a 0.33µF capacitor running in the mains frequency 50Hz will be: X = 1 / {2 ¶ x 50 x 0.33 x( 1 / 1,000,000) } =9645.75 Ohms 0r 96.6 Kilo ohms. Rectance of the capacitor 0.33 uF is calculated as X = 1/2Pi*f*C Where f is the 50 Hz frequency of mains and C is the value of capacitor in Farads. That is 1 microfarad is 1/1,000,000 farads. Hence 0.33 microfarad is 0.33 x 1/1,000,000 farads. Therefore the rectance of the capacitor appears as 9645.75 Ohms 0r 96.6 Kilo ohms..To get current I divide mains Volt by the rectance in kilo ohm.That is 230 / 96.6 = 23.80 mA. Effective impedance (Z) of the capacitor is determined by taking the load resistance (R) as an important parameter. Impedance can be calculated using the formula: Z = √ R + X Suppose the current in the circuit is I and Mains voltage is V then the equation appears like: I = V / X The final equation thus becomes: I = 230 V / 96.6 = 23.80 mA. Therefore if a 0.33 uF capacitor rated for 230 V is used, it can deliver around 23 mA current to the circuit. But this is not sufficient for many circuits. Therefore it is recommended to use a 470 nF capacitor rated for 400 V for such circuits to give required current. X Rated AC capacitors – 250V, 400V, 680V AC x rated ac capacitors Table showing the X rated capacitor types and the output voltage and current without load capacitor and current Rectification Diodes used for rectification should have sufficient Peak inverse voltage (PIV). The peak inverse voltage is the maximum voltage a diode can withstand when it is reverse biased. 1N4001 diode can withstand up to 50 Volts and 1N4007 has a toleration of 1000 Volts. The important characteristics of general purpose rectifier diodes are given in the table. DC Smoothing A Smoothing Capacitor is used to generate ripple free DC. Smoothing capacitor is also called Filter capacitor and its function is to convert half wave / full wave output of the rectifier into smooth DC The capacitance value determines the amount of ripples that appear in the DC output when the load takes current. Voltage Regulation Zener diode is used to generate a regulated DC output. A Zener diode is designed to operate in the reverse breakdown region. If a silicon diode is reverse biased, a point reached where its reverse current suddenly increases. The value of R can be calculated using the formula: R = Vin – Vz / Iz Where Vin is the input voltage, Vz output voltage and Iz current through the Zener In most circuits, Iz is kept as low as 5mA. If the supply voltage is 18V, the voltage that is to be dropped across R to get 12V output is 6volts. If the maximum Zener current allowed is 100 mA, then R will pass the maximum desired output current plus 5 mA . So the value of R appears as: R = 18 – 12 / 105 mA = 6 / 105 x 1000 = 57 ohms Power rating of the Zener is also an important factor to be considered while selecting the Zener diode. According to the formula P = IV. P is the power in watts, I current in Amps and V, the voltage. So the maximum power dissipation that can be allowed in a Zener is the Zener voltage multiplied by the current flowing through it. For example, if a 12V Zener passes 12 V DC and 100 mA current, its power dissipation will be 1.2 Watts. So a Zener diode rated 1.3W should be used. The drawback of the Capacitor power supply includes No galvanic isolation from Mains.So if the power supply section fails, it can harm the gadget. Low current output. With a Capacitor power supply. Maximum output current available will be 100 mA or less.So it is not ideal to run heavy current inductive loads. Output voltage and current will not be stable if the AC input varies. Caution ****************Thanks for watching************************** see u next video
Views: 229 YS Yogesh Shende
About Radio ... Part 4  AC ripple on the HT DC by Andy Davies.
 
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In this fourth video 'About Radio' I talk about the smoothing circuit for the HT DC in the GEC BC5645 radio. If this helps you please let me know. Kind regards ... Andy gw0jxm ~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~ In this series of 'About Radio' I want to show you a circuit diagram for a radio and talk you through what each component is there for. There may be one or two anecdotes along the way, please feel free to let me know the funny radio type things that you've seen and done. I haven't uploaded the next video yet but when I do I'll give you the link details here. Here's the full link to 'About Radio ... Part 1 by Andy Davies' http://www.youtube.com/watch?v=1WzbAmm_oF0 Here's the full link to 'About Radio ... Part 1 by Andy Davies' http://www.youtube.com/watch?v=1WzbAmm_oF0 Here's the full link to 'About Radio ... Part 2 by Andy Davies' http://www.youtube.com/watch?v=lYgJSlEHj1I Here's the full link to 'About Radio ... Part 3 by Andy Davies' http://www.youtube.com/watch?v=2EaAG2HXgns HD Link to part 3 http://youtu.be/2EaAG2HXgns?hd=1 Here's the full link to 'About Radio ... Part 4 by Andy Davies' http://www.youtube.com/watch?v=Xp5KyJref2c HD link to part 4 http://www.youtube.com/watch?v=Xp5KyJref2c&hd=1 Here's the full link to 'About Radio ... Part 5 by Andy Davies' http://www.youtube.com/watch?v=ZzN8a_cqfPQ HD link to part 5 http://www.youtube.com/watch?v=ZzN8a_cqfPQ&hd=1 Here's the full link to 'About Radio ... Part 6 by Andy Davies' http://www.youtube.com/watch?v=y8ahccwnqfo HD link to part 6 http://www.youtube.com/watch?v=y8ahccwnqfo Here's the full link to 'About Radio ... Part 7 by Andy Davies' http://www.youtube.com/watch?v=GXUh_h86FHc HD link to part 7 http://www.youtube.com/watch?v=GXUh_h86FHc&hd=1 If you're interested in this series of videos then I recommend that you also take a look at Rick McWhorter's channel. This is the full link to one of the videos by Rick McWhorter http://www.youtube.com/watch?v=IWxeWnnU4i0 (AllAmericanFiveRadio) Do download his book, it's free but the information is priceless! Rick has put a huge amount of effort and a lifetimes worth of experiences into his videos, I think you find them interesting and entertaining, but be warned, you'll get hooked! I have. In my videos, inevitably there will be things that I forget to mention and maybe some things I get wrong, please feel free to comment and put me right if I go wrong. It's some 40 odd years since I was involved with domestic radios, that was before I qualified as an electrician and subsequently moved on into high power high frequency electronic engineering. I'm not setting out to tell you how to repair radios, the fact that you've read this far probably means you're Interested in radio and I'm merely helping to confirm what you already know. With regards to safety, when I was training they told me that if 30 milliamps passes through you for 30 milliseconds can kill you. Don't make the mistake that thinking that an isolation transformer will protect you from being electrocuted. An isolation transformer, correctly installed, will only protect you from passing current from the mains electrical supply to earth, that's all. If you get across the HT AC or the HT DC that is the High Tension Alternating Current or High Tension Direct Current supply of the radio and the conditions are right, it will stop your heart and if there's no one around to start it again it might just stay stopped! Do use an isolation transformer but back that up with good safe working practice. I'm not setting out to teach you good working practice but do be aware volt for volt DC is more likely to stop your heart than AC but I can also tell you that both hurt and both can kill!
Views: 2555 AndyDaviesByTheSea
Switch mode power supply tutorial: DC-DC buck converters
 
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I explain buck converters (a type of switch mode power supply) and how to build a 5V 5A power supply using an LM2678. Website: http://www.afrotechmods.com/ Parts: http://octopart.com/bom-lookup/781DMaFT Schematic: https://i.imgur.com/iwWnvXv.jpg
Views: 670820 Afrotechmods
Rectifier and Filter (Halfwave - Fullwave rectifier)(working, Operation, waveform) Engineering Funda
 
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This video includes half-wave rectifier, full-wave center tapped rectifier, full-wave bridge rectifier and capacitor filter, inductor filter and Pi filter. RECTIFIER CIRCUIT The circuit which converts AC in DC is called Rectifier Circuit. There are two types of Rectifier Circuit: 1. Half Wave Rectifier 2. Full Wave Rectifier The unwanted AC-components at the output of Rectifier can be filtered using filter circuits. The smooth the output voltage of Rectifiers, Filter Circuit are used. The output of a Rectifier is not a pure DC, it is still having some AC components that we need to filtered out. This AC component removal action is done by Filter Circuit. Filters - Basic Concepts, Shunt Capacitor Filter with Half Wave Rectifier, Shunt Capacitor Filter with Full Wave Rectifier, Series Inductor Filter with Full Wave Rectifier, Series Inductor Filter with Half Wave Rectifier explained with waveform. For free materials of different engineering subjects use my android application named Engineering Funda with following link: https://play.google.com/store/apps/details?id=com.viaviapp.ENG_Funda Above Android application of Engineering Funda provides following services: 1. Free Materials (GATE exam, Class Notes, Interview questions) 2. Technical Forum 3. Technical discussion 4. Inquiry For more details and inquiry on above topic visit website of Engineering Funda with given link: http://www.engineeringfunda.co.in And SUBSCRIBE for more science videos Engineering Funda channel is all about Engineering and Technology. Here this video is a part of Power Electronics.
Views: 47893 Engineering Funda
DC - DC Converter  Failure analysis - Electronic Repair
 
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This DC converter had worked for about one year before failing. It was powering an antenna and Ethernet switch which drew around 0.5 Amp.The input voltage was nominally 12 volts from a solar panel and the output 24 volts. The converter is based on the common UC3843 chip.With no load the unit operates OK with 24 volts output. As soon as the load is applied the output voltage drops. On visual inspection the problem appears to be the input capacitor. Examining the capacitor under a microscope confirms it is damaged. The capacitor is also tested with a capacitance meter and an ESR meter. The capacitor is replaced and the converter tested for correct operation. Click Here to Subscribe http://bit.ly/1nformatica Digital Microscope http://bit.ly/USBuscope Good source of electronic parts: http://bit.ly/ElecComps DISCLAIMER: Unless otherwise stated all products shown in this video have been purchased personally. The description and video may contain links to products which might be affiliate links, so if you click on one of the product links I could receive a small commission. This does not affect the price you pay. If you do purchase through my affiliate link this will help fund future videos, thank you for your support! #1nformatica
Views: 2561 1nformatica
Esr Meter MESR100 v2 Hands on look at a low priced Equivalent series resistance meter.
 
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------------------------------ Click "Show More" -------------------------------------- In this video we will have a look at the MESR100 esr meter from MIB Instruments,We will have a look at the insides and test some components. For the price as an entry level esr meter i would recommend it the test leeds a bit short for in circuit testing But its a great little meter. Features: JINGYAN MESR-100 V2 Auto-ranging capacitor ESR and Low Ohm Meter Measuring range from 0.001 to 100.0R, support IN CIRCUIT Testing. Using true 100 KHz sine wave to measure the ESR value, which is equal to the testing method of capacitor manufacturer. What is ESR of capacitor? There is a series resistor inside a capacitor, by using 100kHz to remove the impedance 1/(2*pi*F*C), the impedance will become small, and we can then measure the true series resistor value. A bad E-capacitor will have a larger ESR and create a large ripple rather than filtering noise. Normally, a bad capacitor is larger than 3 ohm. Using this theory, we can measure to see if the capacitor is bad/ damaged or in good condition. Because this ESR meter only applies less than 15mV DC or peak to peak on a good capacitor, as a result it can be use as an in circuit tester as the low testing voltage will not turn on the semiconductor inside a circuit under test. Specification: 1) Accuracy: Up to 1% Wide Measurement Range: 1uF (for 0.1uF the error will be larger on equation 1/(2*pi*F*C) @ 100Khz ) 2) High Resolution: 4 digit, or 0.001Ohm @ 1 Ohm range 3) Measuring voltage: 40mV RMS (TESTING VOLTAGE) 4) Clamping voltage: 0.15V (open voltage) 5) Battery 2X AA 1.5V battery 6) External Power: 5V micro USB 7) Operating current 0.02A 8) Battery Life time: 80 Hours Thanks for watching, If you liked my videos and would like to support this channel you can make a donation @ http://goo.gl/GqtT4 or click the Show Your Support link, on are channel page and if you use bitcoins you can send us some bitcoins to 1MFGvF7NPaXC7RU5Trwo8z1dUbuowcuw5D Thanks for you support.
Views: 74009 fixitdaz
Simple 12V to 30V boost 200W inverter converter | How to make
 
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Simple 12V to 30V boost 200W inverter converter | How to make Simple 12V to 30V boost 200W inverter converter | How to make Simple 12V to 30V boost 200W inverter converter | How to make A boost converter (step-up converter) is a DC-to-DC power converter that steps up voltage (while stepping down current) from its input (supply) to its output (load). It is a class of switched-mode power supply (SMPS) containing at least two semiconductors (a diode and a transistor) and at least one energy storage element: a capacitor, inductor, or the two in combination. To reduce voltage ripple, filters made of capacitors (sometimes in combination with inductors) are normally added to such a converter's output (load-side filter) and input (supply-side filter). Download file here: http://123link.pro/bt9e70 (click link, click i;m not robot, wait 7 sec, click get link - ok ) #inverter #12vto220v #invertersine
Views: 1674 Homemade 102
Clearing and Core Drill machine for CBB60
 
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More details pls contact Mr.Robin Huang at [email protected] This machine can working for film capacitor with Cylinder shape with signal and dual core capacitor, High Voltage AC clearing adapt with Resonance Compensation intelligently for saving more energy. This machine after using AC low voltage take out the short circuit point and DC with Positive and Negative reversed (+/- and –/+ ) slowing rising for clearing, AC high voltage for clearing, then machinery will automatic testing for capacitance and capacity loss then go to automatic sorting. Core drilling function can be added. This kind of machine designed with high level automatic operation, only one work can working for 4-5 sets of this machines for saving the labor cost.
Views: 102 Robin Huang