Equal Losses control strategy for all switches of intermediate frequency heating power supply

Abstract

The energy loss of the switches of the lead legs and lag legs during the operation of the intermediate frequency heating power supply using the traditional full bridge control method has a certain difference, and the greater the power of the device, the more obvious the difference. This phenomenon seriously affects the reliability of high-power intermediate frequency heating power supplies. In this paper, the original full-bridge inverter drive is adjusted, and the conditions for implementing ZVS are analyzed. Finally, the equal losses control strategy for all switches is achieved by using the waveform generated by the FPGA controller.