Measurements
Vrec: rectified voltage of the input AC source
PWM-In-low: input PWM signal for low side
Vge-low: low side gate-emitter voltage
I_IGBT_low: low side current through IGBT
VOUT: output voltage of the half bridge
IOUT: output current of the half bridge
power-in: input power of the circuit
power-load: output power of the circuit
This application circuit simulates an induction cooking with half bridge
topology (current resonance). The induction load is an equivalent circuit with
Lres-eq, Rload-eq, Cres1 and Cres2.
With the values 30µH and 2x360nF, the resonant frequency fres is about 34.2 kHz.
The Switching frequency is 40 kHz in the example circuit, which can be modified by
changing the wave form of the PWM-In-high/PWM-In-low signal generators.