Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [zvs]

Zero-Voltage Switch driver, a.k.a. Mazzilli oscillator

62 questions
10
votes
4 answers

What is a flyback?

Trying to find this answer is so difficult that I can't even tell whether What is the difference between a transformer and a coupled inductor? is asking the same thing. Some reading suggests that a "flyback" element (which may be called a "flyback…
feetwet
  • 2,322
  • 9
  • 31
  • 55
5
votes
3 answers

ZVS driver charging capacitor bank

I built a ZVS driver to make some big, high-voltage sparks a while ago. It worked off three voltages, 24 V, 50 V, and 80 V, and had no issues. The only part of it that got really hot were the 1 kΩ, 3 W resistors. Recently I decided to play around…
Andrew
  • 123
  • 9
4
votes
1 answer

P-channel MOSFET ZVS Flyback Driver

I want to make a ZVS flyback driver, but all the sites say to use 2 n-channel MOSFETs and I only have one powerful n-channel MOSFET. I have a bunch of p-channel MOSFETs, specifically, 2 of powerful Fairchild SFH9154 MOSFETs. I am wondering if there…
skyler
  • 10,136
  • 27
  • 80
  • 130
4
votes
1 answer

How do I size a zener diode for use as a freewheel diode for a ZVS induction heater?

My electronics experience is "hobbyist" and I'm in some new territory with this question, so forgive me if this question turns out to have an easy answer or prove to be dumb. I have a basic ZVS induction heater circuit: It runs on 12VDC and works…
redeyedjim
  • 53
  • 6
3
votes
2 answers

Troubleshooting ZVS flyback failure

I built a ZVS flyback driver a couple months ago, and it worked great and amazed people with the arcs it managed to create. I used 2 IRFP250 MOSFETs and the results were great. One day I was wanting even bigger arcs, and I combined two 12 volt…
skyler
  • 10,136
  • 27
  • 80
  • 130
3
votes
1 answer

buck converter in CRM

I would like to simulate the ZVS Synchronous rectification buck converter, I know if I operate in ZVS I need to change the switching frequency of the buck converter. Here are my questions: How to model the variable frequency of buck converter? I…
Jitter456
  • 555
  • 2
  • 7
3
votes
2 answers

What is the meaning of zero voltage switching (ZVS) and zero current switching (ZCS)?

I was reading about induction heating circuits in a electronics textbook and saw the terms ZVS and ZCS which are abbreviation for Zero Voltage Switching and Zero Current Switching respectively. There are many academic articles about these topics,…
Hesam Qodsi
  • 215
  • 2
  • 3
  • 9
2
votes
1 answer

Can this ZVS driver power a Cockcroft Walton Multiplier?

I'm having trouble figuring out how to connect my ZVS driver (30-50khz) to this Cockcroft Walton multiplier (CWM.) I'm starting to wonder if it can even work with this circuit. Its maximum arc gap is 1 cm, so I'm assuming when the input is 20VDC…
HelloCthulhu
  • 31
  • 3
2
votes
2 answers

Getting Right parts and building ZVS flyback correctly

I recently built a 555 timer flyback driver. I used 2 IRFP450 MOSFET's in parallel to drive it and I got pretty good arcs. Something always seemed to fail, and I always was buying another 555 chip or another MOSFET. I powered it at 12 volts with a…
skyler
  • 10,136
  • 27
  • 80
  • 130
2
votes
2 answers

How does zero voltage switching work if VDS = 0?

One of the fundamental criteria to put a MOSFET in to saturation is for its VDS > VGS-VT. It's also my understanding that zero voltage switching works by first decreasing VDS (ideally to 0) before applying a VGS>VT. This eliminates switching losses…
Jake Hertz
  • 363
  • 2
  • 8
2
votes
1 answer

SMPS Simulation Help

Finally bit the bullet and considered getting help with a simulation I'm looking to get right. Just a heads up, I have limited experience with SMPS simulation in both LTSpice and Multisim. The circuit I'm attempting to simulate is an interesting ZVS…
justaguy
  • 43
  • 7
1
vote
1 answer

LTspice transformer not working as expected

I made this ZVS circuit on LTspice and want to make high voltages with it. The ZVS circuit does work fine and output high power but the transformer I made doesn't work fine. I want x400 step up which means the inductance ratio of the inductors has…
user347232
1
vote
1 answer

ZVS driver not oscillating - powersupply

I'm using a ZVS driver to create a spark for a plasma speaker. The circuit above is the one I'm using for my project however I have run into some issues whihc I do not understand. First of all the circuit works when tested in LTspice but I had to…
Raphael Buitendag
  • 11
  • 1
1
vote
2 answers

In a ZVS circuit, why does frequency increase when an arc forms?

In a GreatScott video, when he made an arc using a ZVS circuit, the frequency jumped from 40 kHz to around 80 kHz when the arc formed. I read that this is because the inductance is reduced because of the higher current flowing, but I still don't…
asker
  • 13
  • 2
1
vote
1 answer

ZVS Oscillator for Wireless Power Transfer

I am designing a wireless power transfer system based on the Royer oscillator ZVS principle. I based my circuit on the following image, this can be found in the application note [ANP032] page 21. The circuit I have designed is given below. The…
EmeraldMonk
  • 175
  • 8
1
2 3 4 5