Phase-Shifted Half-Bridge Resonant Inverter For Driving Magnetron

This paper presents a phase-shifted half-bridge resonant inverter 1.6 kW (4 kV, 400 mA) for driving a magnetron for the sulfur plasm tube. In the presented High voltage power supply (HVPS), with control of the switching scheduling and the phase-shifting of the on-state, the switching losses decreased. Also, using the series-resonance circuit has provided the condition of soft switching (ZVS). The power supply, depending on the required power, can control the peak and average power in minimum-loss condition. The HVPS samples the magnetic current of the transformer and then phase-shifts the switching and balances the magnetic current of the transformer as well. The maximum power of a microwave is 1600 W and its average power is 200-400 W, which is controlled according to on-state times of the inverter. Other advantages of the proposed design are the simplicity of the power circuit, reduction in the switching losses, and the leakage inductance of the power transformer. The design results have been simulated and verified through the MATLAB software.