Research On Series Resonant Induction Heating Power Supply

Induction heating, as a heating method, has many advantages compared with traditional heating. The technology of induction heating has been used in many applications nowadays. And the development of the power semiconductors accelerates the technical renovation of induction heating.Mainly analyses the theory of induction heating power supply. After comparison of some inverter's topologies, this paper selects the series inverter. The active state of series resonant interver are analyzed through theoretical and simulational analysis and the conclusion that induction quasi-resonant state is the better functional mode is drawn. The phase control rectifier as the power control mode had been determined in the article through the analysis of series resonant induction heating power supply's characteristics of load and power regulation.The switching processes of series resonant inverter is researched. The zero-voltage-switching (ZVS) strategy to minimize the power loss is presented. The phase-locked loops theory and the basic structure of the phase-locked loops has been analyzed. Base on the analysis, a circuit is designed which solve the problem that the short circuit.