Optimal switching frequency range determination for inductively coupled heating systems incorporating a compensation resonant circuit

Eun Seong Kim; Sung-Min Park

Optimal switching frequency range determination for inductively coupled heating systems incorporating a compensation resonant circuit

Eun Seong Kim

Sung-Min Park

Vol. 26, No. 4, pp. 887-895, Apr. 2026

10.1007/s43236-026-01306-3

Induction heating

Inductively coupled heating

Power control

Dual coil

Abstract

This paper presents an operating switching frequency range selection algorithm for an inductively coupled heating system that incorporates a compensation resonant circuit to improve the load-side power factor and overall power conversion efficiency. The integration of the compensation resonant circuit introduces an additional resonant frequency at which the output power reaches its maximum, thereby generating multiple resonant frequencies. Consequently, an operating frequency region exhibiting a higher load-side power factor can be identified even under identical output power conditions. The proposed algorithm determines the optimal switching frequency range that achieves a higher load-side power factor across multiple resonant frequency regions while maintaining the same output power. Its validity was confirmed by MATLAB simulations and experimental tests.

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Cite this article

[IEEE Style]

E. S. Kim and S. Park, "Optimal switching frequency range determination for inductively coupled heating systems incorporating a compensation resonant circuit," Journal of Power Electronics, vol. 26, no. 4, pp. 887-895, 2026. DOI: 10.1007/s43236-026-01306-3.

[ACM Style]

Eun Seong Kim and Sung-Min Park. 2026. Optimal switching frequency range determination for inductively coupled heating systems incorporating a compensation resonant circuit. Journal of Power Electronics, 26, 4, (2026), 887-895. DOI: 10.1007/s43236-026-01306-3.