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ZVS Induction heater 2000W 40A 50V
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strawberry:
ZVS Induction heater 15..50V 40A 2kW
Stanby loss with 6 capacitors: 6A@50V
MOSFETS: IRFP4227
Capacitors: WIMA FKP4 0.22uF 1000Vdc
Tank coil: D35mm H35mm 5w
PCB fabricator: PCBway
Power supply:  DPS-2500AB 2000W P-CLASS PROLIANT BLADE POWER SUPPLY

https://youtu.be/1Z1EJBMwy5Q
Altium source files : https://drive.google.com/open?id=0BwVLiaRx-ca4c2pJVlhLRmEyNDQ
Coil : https://www.ebay.com/itm/303569445933
bktemp:
Nice design. What does your work coil look like?

One neat trick I have seen is using a small mosfet instead of the diodes (D2 and D3 in your design):
Connect the gate to 15V, source to the gate of the main mosfet and drain to drain of the opposite mosfet. So the gate voltage follows the drain voltage as long it is below ~13V.
Using this method all the gate drive power is derived from the tank circuit. So you don't need any pullup resistor or the addional gate drive stage.
The only drawback is, the 15V auxiliary supply must be present before the main voltage is applied, otherwise it may no start up correctly.
strawberry:
Cu pipe
T3sl4co1l:
Cute, but how is it different from the cheap junk one made in China?  Is this one safe from exploding when the coil is open or short circuited?  Does it have power control?  Can it be scaled up to practical sizes (10kW+)?

Tim
RadioNerd:
It looks like you are not using any water cooling for the work coil.
Can you use it for several minutes without overheating?
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