A new circuit topology of induction heating equipment consisting of voltage controlled hybrid resonant inverter is described in the present work and also it is simulated in PSIM. High frequency inverters are generally installed in modern induction heating equipments to produce the high frequency alternating magnetic field for better controllability, cost effectiveness and energy efficiency. In most of the cases of high frequency inverter, the inverter operates near the resonant frequency band to implement the soft switching technique which minimizes the switching loss. But earlier generally the switching frequency was varied to increase or decrease the heat in the work piece. This method has certain disadvantages. But in the proposed scheme shown here, there is a provision of changing the dc link voltage to change the intensity of heating. So in this method, the amount of heat produced in the work piece can be controlled, both by switching frequency control and supply voltage control resulting in the increase of controllability.

Keywords: High frequency, Hybrid resonant inverter, PSIM, Low pass (LP) filter, Induction heating, Controllability