very good video sir! jsut what i was looking for for my tesla coil. there arent enough explaination video's of flyback transformers and you explained them professionally and clearly. your channel deserves much more attention!
I think I have ordered the correct parts to build this circuit. One change I plan to make is with the TWO LED 'warning' system. An AND-gate function can be made with only two diodes, allowing a more noticeable single BRIGHT RED LED to give the "warning"
At about timestamp 5:11 you say that "the current has nowhere to go now except to charge capacitor C1..." Why will it not go through Q1?? THANKS FOR THE BEST EXPLANATION SO FAR!!!
How would you use a digital signal to turn the ZVS on and off when the load is a capacitor and it has charged to the desired voltage or falls below the desired voltage?? Perhaps: (1) Use a comparator (with hysteresis) and power transistor to cut on/off the supply voltage? OR (2) Pull both mosfet gates LOW with an open-drain transistor controlled by the comparater? What do you think?? Thanks
Is this circuit durable to high frequencies, can it work with high resonant frequencies like 500kHz. I mean should we modify the circuit with active gate drive.
Sure, You see in my demo I was operating it close to 275 Khz and the gate waveforms were very good. This circuit should work well upto 1 Mhz without any modifications (I never had to take it that high honestly). But it is capable. When it comes to very high frequency the gate diode needs to be very fast and the gate resistor can be reduced a bit to reduce the rise time of the gate charging pulse (by how much exactly i need to experiment a bit but that's the theory). To answer your query, Yes it can handle 500 Khz. Just keep the voltages 4 times less than the max VDS voltage of the mosfet just as an insurance.
In your circuit description, I don't see exactly how, when G1 is on and G2 is off, how L2 is ALSO charged. In the ZVS boards Q1 and Q2 are SEPARATE coils wound on SEPARATE coils wound on two toriods (usually placed at quite long distances from each other on the circuit board). Is it because this description is for single-toriod circuits (like a center tapped heater coil)? What about the circuits that have the 3-output terminals?
It "works", but how about Miller capacitance? Just show us the GATE-driver signal(s), for starters, as a function of workload insertion/removal would be nice too. Some display of "purity" on a spectrum analyzer would be icing on that cake...
Thanks for showing interest and happy that it works. In my testing I didn't find any major distortion in the gate signal for the kind of loading I was doing. But sadly I don't have a spectrum analyser ☹️. My channel is just in the infancy and hopefully I will be able to do it once the channel grows. I basically make do with what I can get my hands on and this is my passion. Hopefully in the future. Thanks for the support.
@@TheKnurdLab By the way, maybe you've also noticed this somewhat vague statement in recent years: « This schematic diagram is copied by the german patent nr. 35 19 489 / 30.11.1989 » Problem being i never managed to actually find said patent anywhere, but i was hoping maybe you or someone else have. In addition,it might satisfy the viewer's curiousity to eventually observe galvanically-isolated coupling performed at the "RF Choke" (L3) level. So please consider having a quick look at what i happened to stumble on, just a couple days ago: ruclips.net/video/kXx0NxmcTq4/видео.html It ain't even new, the guy modulated his power stage but i figure he could as well attempt to extract feedback signals that are presumably measurable in amplitude, frequency and phase... This would provide a convenient enough opportunity to expand the circuit using a smart-slave daugther (option) board without disabling the initial stand-alone function. This way good old fallback Mazzilli/Royer ZVS mode shall remain available for additional dependability, while smart mode should open up fresh new perspectives as to "scan" for microphonics in presence of a permanent "bias" magnet, evaluate susceptor temperature, etc. Good day, have fun!!
@@TheKnurdLab It seems i may have not noticed this capture the 1st time: ruclips.net/video/c6s-km-UiHA/видео.html 5:55 Gate Voltage Waveform for MOSFET Q1 & Q2 While i'm passing by, why not also bring attention to some stimulating detail revealed in the schematic of this next video: ruclips.net/video/My_J3xzDaZ0/видео.html 4K Sub Special - Plasma Pen Full Tutorial (You'll want one after watching) (2018-Feb-27) {Schematic @ 19m59} Those gate(s) bias ain't hard-wired anymore...
It is basically a buck converter on a chip I guess. Not worked with them though. But I will try to do a video on buck converters and their working principle perhaps in the near future.
This is a CDEK SDS1102X 110Mhz/1GSa/s bought from Amazon. It is good entry level and using it since a year. Helps me a lot. Also Hantek DSO2C10 is a good and cheap option. Has an inbuilt waveform generator and lot more other features too.
The geometry of the coil is not a problem as long as you know the inductances and the capacitances involved to calculate your operating frequency (if looking for a particular operating frequency). There are many online calculators for that. When it comes to the max power, the upper limit of the mosfet drain to source voltage is the limiting factor. Also is the current through the capacitors. For example, If your calculated capacitance for a target frequency is 1uF, then you may try using 5 * 0.22uF caps in parallel so they share the current and get less hot. Select a mosfet whose max VDS is atleast more than 4 times that of your supply voltage. You are good to go! This circuit can safely operate upto 24V although that is very close to the safety margin. Its got to do with the mosfet's fragility than your safety margins. If you are unlucky and have some spikes, you will blow the mosfet.
Yes it is ok as long as you see both the status LEDs are lighting up. If only one LED is ON it means one MOSFET is latched ON and the circuit is not oscillating. In that case switch OFF power immediately and check the connections.
I managed to build it from parts salvaged from an old TV set and easily available electronic parts. Sorry it is not for sale and meant only to explain the workings and science behind it for educational purposes. All the details are explained in the video and please be careful while working with high voltages. High voltage is fatal and please read all the safety warnings and disclaimers.
I can suggest that you increase the switching device's power handling capacity to increase the overall capacity of your circuit. For example use a higher power rated MOSFET so long as the voltage requirement is met.
very good video sir! jsut what i was looking for for my tesla coil. there arent enough explaination video's of flyback transformers and you explained them professionally and clearly. your channel deserves much more attention!
Happy to know you found it useful. Thanks for the kind words.
Nice explanation Sir 🤗
“Sir-cute” 😂😂
I think I have ordered the correct parts to build this circuit. One change I plan to make is with the TWO LED 'warning' system. An AND-gate function can be made with only two diodes, allowing a more noticeable single BRIGHT RED LED to give the "warning"
At about timestamp 5:11 you say that "the current has nowhere to go now except to charge capacitor C1..."
Why will it not go through Q1??
THANKS FOR THE BEST EXPLANATION SO FAR!!!
You gained a subscriber
How would you use a digital signal to turn the ZVS on and off when the load is a capacitor and it has charged to the desired voltage or falls below the desired voltage??
Perhaps:
(1) Use a comparator (with hysteresis) and power transistor to cut on/off the supply voltage?
OR
(2) Pull both mosfet gates LOW with an open-drain transistor controlled by the comparater?
What do you think??
Thanks
The flyback voltage is ac or dc?
Nice video
Thanks.
Great
Thank you
One more thing...shouldn't there be a red dot at the negative battery point to the other components??
Is this circuit durable to high frequencies, can it work with high resonant frequencies like 500kHz. I mean should we modify the circuit with active gate drive.
Sure, You see in my demo I was operating it close to 275 Khz and the gate waveforms were very good. This circuit should work well upto 1 Mhz without any modifications (I never had to take it that high honestly). But it is capable. When it comes to very high frequency the gate diode needs to be very fast and the gate resistor can be reduced a bit to reduce the rise time of the gate charging pulse (by how much exactly i need to experiment a bit but that's the theory). To answer your query, Yes it can handle 500 Khz. Just keep the voltages 4 times less than the max VDS voltage of the mosfet just as an insurance.
In your circuit description, I don't see exactly how, when G1 is on and G2 is off, how L2 is ALSO charged. In the ZVS boards Q1 and Q2 are SEPARATE coils wound on SEPARATE coils wound on two toriods (usually placed at quite long distances from each other on the circuit board).
Is it because this description is for single-toriod circuits (like a center tapped heater coil)? What about the circuits that have the 3-output terminals?
Why do the gate resistors draw large current??
0:30 "to produce very high currents and high frequency", I think you wanted to say "to produce High voltage" "high current" "high frequency"
@@Agni_Puthra nice, anyway great video, new subscriber achieved
It "works", but how about Miller capacitance? Just show us the GATE-driver signal(s), for starters, as a function of workload insertion/removal would be nice too. Some display of "purity" on a spectrum analyzer would be icing on that cake...
Thanks for showing interest and happy that it works. In my testing I didn't find any major distortion in the gate signal for the kind of loading I was doing. But sadly I don't have a spectrum analyser ☹️. My channel is just in the infancy and hopefully I will be able to do it once the channel grows. I basically make do with what I can get my hands on and this is my passion. Hopefully in the future. Thanks for the support.
@@TheKnurdLab By the way, maybe you've also noticed this somewhat vague statement in recent years:
« This schematic diagram is copied by the german patent nr. 35 19 489 / 30.11.1989 »
Problem being i never managed to actually find said patent anywhere, but i was hoping maybe you or someone else have.
In addition,it might satisfy the viewer's curiousity to eventually observe galvanically-isolated coupling performed at the "RF Choke" (L3) level. So please consider having a quick look at what i happened to stumble on, just a couple days ago:
ruclips.net/video/kXx0NxmcTq4/видео.html
It ain't even new, the guy modulated his power stage but i figure he could as well attempt to extract feedback signals that are presumably measurable in amplitude, frequency and phase... This would provide a convenient enough opportunity to expand the circuit using a smart-slave daugther (option) board without disabling the initial stand-alone function. This way good old fallback Mazzilli/Royer ZVS mode shall remain available for additional dependability, while smart mode should open up fresh new perspectives as to "scan" for microphonics in presence of a permanent "bias" magnet, evaluate susceptor temperature, etc.
Good day, have fun!!
@@TheKnurdLab It seems i may have not noticed this capture the 1st time:
ruclips.net/video/c6s-km-UiHA/видео.html
5:55 Gate Voltage Waveform for MOSFET Q1 & Q2
While i'm passing by, why not also bring attention to some stimulating detail revealed in the schematic of this next video:
ruclips.net/video/My_J3xzDaZ0/видео.html
4K Sub Special - Plasma Pen Full Tutorial (You'll want one after watching) (2018-Feb-27) {Schematic @ 19m59}
Those gate(s) bias ain't hard-wired anymore...
Also if you could give similar explanation for LED drivers e.g. HW9315 IC circuit
It is basically a buck converter on a chip I guess. Not worked with them though. But I will try to do a video on buck converters and their working principle perhaps in the near future.
@@TheKnurdLab particularly the constant current and power factor correction action, It is hard to understand how high pf correction work
Hi sir, what is the DSO brand and what is its price. I am looking forward to buy one. Any suggestions will be helpful
This is a CDEK SDS1102X 110Mhz/1GSa/s bought from Amazon. It is good entry level and using it since a year. Helps me a lot. Also Hantek DSO2C10 is a good and cheap option. Has an inbuilt waveform generator and lot more other features too.
How much watt this driver support. Its working on pancake coil ?
The geometry of the coil is not a problem as long as you know the inductances and the capacitances involved to calculate your operating frequency (if looking for a particular operating frequency). There are many online calculators for that. When it comes to the max power, the upper limit of the mosfet drain to source voltage is the limiting factor. Also is the current through the capacitors. For example, If your calculated capacitance for a target frequency is 1uF, then you may try using 5 * 0.22uF caps in parallel so they share the current and get less hot. Select a mosfet whose max VDS is atleast more than 4 times that of your supply voltage. You are good to go! This circuit can safely operate upto 24V although that is very close to the safety margin. Its got to do with the mosfet's fragility than your safety margins. If you are unlucky and have some spikes, you will blow the mosfet.
Is it OK to run the ZVS driver with no load??????
Yes it is ok as long as you see both the status LEDs are lighting up. If only one LED is ON it means one MOSFET is latched ON and the circuit is not oscillating. In that case switch OFF power immediately and check the connections.
Sir I want this what is the price ....
I managed to build it from parts salvaged from an old TV set and easily available electronic parts. Sorry it is not for sale and meant only to explain the workings and science behind it for educational purposes. All the details are explained in the video and please be careful while working with high voltages. High voltage is fatal and please read all the safety warnings and disclaimers.
I want to make 2000 watt need schematic.
Sorry it doesn't work that way! This is an educational channel. I don't sell designs.
@@TheKnurdLab ok,by the way good video 👍
Thank you.
I can suggest that you increase the switching device's power handling capacity to increase the overall capacity of your circuit. For example use a higher power rated MOSFET so long as the voltage requirement is met.
@@TheKnurdLab thank you🙏
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