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The amount of current drawn from the supply will vary with the temperature and size of the object being heated.
The maximum current is determined by the saturation current of the inductor.
When the saturation current is reached, the voltage that turns on the one ON transistor will start to fall, turning off that transistor and turning on the other transistor.
It's a sell oscillating converter that depends upon the inductor saturation current for operation.
Choke (inductor L2)
This limits the power to your induction heater. If yours is not oscillating, then you may need more inductance to prevent voltage drop in your PSU. You will need to experiment with how much inductance you need. Better to have too much, than too little as this will only limit the power of the heater. Too little may mean it wont work at all.
GaryThe maximum current is determined by the saturation current of the inductor.
When the saturation current is reached, the voltage that turns on the one ON transistor will start to fall, turning off that transistor and turning on the other transistor.
It's a sell oscillating converter that depends upon the inductor saturation current for operation.