CDC Electronic Workshop - More experimenting with Gate Drive Transformers

Cool Dude Clem's Electronic Workshop is back! (I can't do that thing at the end now becuase the annotaions have changed their look)

But anyway in this video I experiment with making a good gate drive transformer for a mosfet half-bridge, and the results have been pretty darn good. There's also a description of how a half-bridge actually works becuase no-one has seemed to explain that, the only thing I can't explain is why the sound is utter crap in that part of the video.

Category:

Science & Technology

Tags:

• Electronic
• Experiments
• Experimental
• Transformers
• Half
• Bridge
• Mosfet
• SG3525
• Volts
• Amps
• High
• Voltage
• Flyback
• Singing
• Arc
• Audio
• Modulate

[robot797]

cant you just give us all the circuts

becaus i want to build this

it seems reliable and gives potential to tune

[CoolDudeClem]

@robot797 I have a few more videos comming up about this kind of thing, I will show a schematic of this setup in the next video.

[Films4You]

Audio take care SOPA/PIPA don't catch you

Make only your own music

[CoolDudeClem]

@Films4You All the music I played in this video is copyright free 8-Bit music, so there shouldn't be any problem there, and even tho there is some music from a game playing where I do the intro, again that should still be ok.

[Alex1M6]

Glad you got it working, I like this driver much better than the ZVS as you can actually control it via a pot. Regarding the audio volume from the arc I have found using a 2.2uF or larger non-polorised capacitor on the audio input helps allot. The larger the capacitor on the audio input the louder you can turn up the volume before the sound starts distorting.

[sk7ca]

Dude! don't hold a pair of a TP cable with your fingers at these voltages! you never know if the ground connection breaks and you'll zap yourself pretty badly. at least tape those wires to a plastic stick of some sort. 

[ee2008117]

@CoolDudeClem Thankz !!

true But The GDT is Attached with the MOSFETs Gate and Source!!

So its All right to operate With the GDTs u have shown In this video with Half bridge Inverter Whose Load Current will Be 25 A ????

[ee2008117]

@CoolDudeClem So High Current doesnot effect The GDT ???

and Can I use Multiple MOSFETs i.e Parallel 2 or 3 MOSFETS in half bridge Inverter With Single GDT >???

[CoolDudeClem]

@ee2008117 You won't need think wires on the GDT, the mosfets in the halfbridge will handle all the current, in my next video I will show the schematic of this circuit.

[ee2008117]

@CoolDudeClem Ok Thankz For Ur reply !!

Now For Induction Furnace As u know It Consumes Alot Of Current !

So my Question Is that the winding Of GDT is Effected By this ???

Means In Ur Video U have Used thin Wire For Gdt ... As I have To uSe Atleast 25 A Current Through Half Bridge Inverter ?? Is I Have To Wind GDT With Thicker Wires ????

[CoolDudeClem]

@ee2008117 Ok, the push-pull was just to buffer the output from the chip so the chip doesn't have to work as hard, it's a bit like an amplifier only there's no amplification, but in some caes if the GDT is good enough it's not needed. For winding the GDT I first twisted 3 wires round each other, then wound them round the core about 30 times (I think(I don't know exactly how many turns I used)), the capacitors were 10000uf electolytics.

[bandbgamesroom]

f(bleep)cking camera was paused all the time i thought it was recording