Electronics > Projects, Designs, and Technical Stuff
ZVS Induction heater 2000W 40A 50V
BlackTM:
Hi strawberry.
Can you please tell me at what frequency does your induction heater work?
james_s:
The induction heater I built from a circuit I found online uses a small 15V standby power supply to get it oscillating and then there is a relay that applies full power when activated. Hasn't blown up yet.
strawberry:
--- Quote from: BlackTM on May 18, 2017, 07:24:45 pm ---Hi strawberry.
Can you please tell me at what frequency does your induction heater work?
--- End quote ---
It's roughly 90..100kHz( depends on work coil and capacitors)
--- Quote from: james_s on May 19, 2017, 12:30:25 am ---The induction heater I built from a circuit I found online uses a small 15V standby power supply to get it oscillating and then there is a relay that applies full power when activated. Hasn't blown up yet.
--- End quote ---
My schematic are the same, but additional gate drive emitter follower gives nice square wave for MOSFET gates.
calexanian:
Looks good. I have a couple of those cheap ones from china. I also have a big old lepel RF generator. I have always wanted to modify one of these circuits with a starter circuit that would always ensure a proper start. I think maybe a quick one shot pulse on one side to get it going, or introduce a low level recurring pulse on one side from a separate driver circuit that then just gets ignored once the power devices get going. I have mine connected to a foot switch and an LED riged up when it is running. If the light does not turn on I let up on the pedal momentarily and when I step back on it again it will usually start. I also use a variac to control the power level. Its a nice arrangement. Very accurate. Makes pretty welds in copper pipe if solder paste is used. Fantastic for copper tube wave guides. Gotta use water cooling for that though cause copper is hard to heat.
strawberry:
Lepel RF generator is something new for me, is it using vacuum tubes? Do you have schematic?
I am planing to build mains powered PLL induction heater. I am aiming on about 3kW power
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