Abstract
In this paper, a new control scheme of Class-E inverter for induction heating (IH) jar applications with clamped voltage characteristics using pulse-frequency modulation (PFM) is introduced. To reduce the voltage stress of the switch, the proposed PFM control scheme doesn't need any auxiliary circuit in comparison to a family of active clamped Class E (ACCE) inverter. It can decrease voltage stress of switch through modulation of switching frequency. The Class-E inverter using the proposed control scheme has the advantages of not only the same output power when it is compared with a hybrid-active clamped Class-E (hybrid-ACCE) inverter but also zero-voltage-switching (ZVS), which are characteristics of conventional Class-E and active clamped Class-E (ACCE) inverter. The control principles of the proposed method are explained in detail and its validity is verified through experimental results.
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