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http://dx.doi.org/10.7471/ikeee.2021.25.3.534

A Study on the Maximum Energy Transfer of a Small Industrial Induction Heater  

Lee, Jeong-Bin (Dept. of Smart Electrics, Korea Polytechnic College)
Kim, Tae-Myoung (Entec Korea Co., Ltd.)
Kim, Young-Wan (Dept. of IT Convergence Communication Engineering, Kunsan National University)
Publication Information
Journal of IKEEE / v.25, no.3, 2021 , pp. 534-539 More about this Journal
Abstract
Induction heating method that allows the maximum heating power to be delivered by varying switching frequency in the inductance change of the work coil of induction heater was proposed in this paper. Depending on the type of work piece in the work coil and proximity to the work coil, the resonance frequency of the resonant circuit will be changed. It may be difficult to deliver the maximum power due to the damage of the induced heater element or switching loss depending on the resonance frequency and switching frequency operating relationship. The switching frequency was variable to maintain the maximum power transmission by sensing the heating power due to the change of the resonance frequency. Through the result of the proposed method that can be controlled within the required output change range according to the change of the switching frequency corresponding to the change of the resonance frequency, the induction heater having a variable switching frequency characteristic that can transmit almost constant output power (within 0.43 dB) power efficiency was achieved.
Keywords
Induction heating; Work coil; Resonant frequency of induction heater; High frequency induction heater; Variable switching frequency;
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