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Dual-frequency induction heating technologyhas significant advantages over traditional single-frequency heating for gear quenching. In this paper, the absorption of gear induction heating energy is analyzed theoretically. Based on the simulation of high frequency, medium frequency and dual-frequency magnetic and thermal field with 2-mode 22tooth gear on ANSYS, it is concluded that the uniformity of the dual-frequency induction heating power supply has obvious advantages in heating. The structure of the dual inverter bridge synchronous dual-frequency induction power supply is studied, the dual inverter bridge synchronous dual-frequency sensor parameters are optimized, and the output variable voltage ratio of 5:1 is determined to achieve the maximum load current inflow to the load. Keywords-Gear Quenching; Induction Heating; Sychronous Dual Frequency; Variable Pressure Ratio

Designing and Optimization of Gear Synchronous Dual-Frequency Induction Heating Power Supply Based on ANSYS