I am currently building an induction heater and would like to verify my approach to this as I'm uncertain if it is correct. Below is the topology of the resonant tank circuit I have constructed. The tank circuit illustrated is coupled to a H bridge driver via a current transformer, with a resonant frequency of 12.841KHz.
Each capacitor is rated at a peak current loading of 25A at 10KHz, achieving 50A in their current configuration. Therefore, considering peak current flow and factoring it against the ESR of the circuit (0.013 Ohms), the peak voltage of the secondary circuit must not exceed 0.65V assuming no impedance due to reactance is present. However, this would only be capable of producing 32.5W (0.65V x 50A) which is far below what I am aiming to achieve.
The primary side of the circuit supplies 48V (960VA) to the primary coil of the CT. The transformer ratio calculated gives: Vp/Vs = 48V/0.65V = 73.8 turns. This seems excessive and likely to result in a very high inductance/impedance on the primary side of the circuit, inhibiting current flow / overall power.
My questions are:
1) Is my approach to designing this circuit correct so far? If not, what mistakes am I making?
2) Does my power calculation reflect the total power of the circuit or just the power lost?