Development of Power Supply for Induction Heating System

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This paper describes a POWER MOSFET inverter suitable for medium frequency induction heating applications. A series scheme is employed, which is operated at zero phase of the resonant load by PLL control. This ensures maximum power transfer, good efficiency, low EMI noise and reliable operation. Circuit configuration and performance are discussed and design criteria are given. Implementation of a prototype rated at 5KW, $100{\sim}300KHz$ is discribed and experimental results are given.