All-metal induction heating (IH) systems have been introduced to heat both ferromagnetic and non-ferromagnetic pots using dual resonant frequencies. They are designed for heating ferromagnetic pots using a first harmonic operation mode (FHOM) and for heating the non-ferromagnetic pots using a third harmonic operation mode (THOM). All-metal IH systems employing dual resonant frequencies consist of an IH inverter and a power factor correction (PFC) circuit to transfer desired power to pots by increasing the input voltage of the IH inverter. In this paper, the input voltage is designed to obtain an efficiency-optimized operating point. To obtain an appropriate input voltage, power loss analyses are conducted using first harmonic approximation (FHA). Based on analysis results, the input voltage of the IH inverter can be selected to improve its power conversion efficiency. A 2-kW half-bridge series resonant inverter prototype is implemented to verify the effectiveness of the proposed design by heating ferromagnetic pots using the FHOM with a 2-kW transfer power and by heating non-ferromagnetic pots using the THOM with a 1-kW transfer power.

中文翻译：

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使用高匝数线圈的全金属感应加热应用的半桥串联谐振逆变器的输入电压选择方法

已引入全金属感应加热 (IH) 系统以使用双谐振频率加热铁磁和非铁磁锅。它们设计用于使用一次谐波操作模式 (FHOM) 加热铁磁锅，并使用三次谐波操作模式 (THOM) 加热非铁磁锅。采用双谐振频率的全金属 IH 系统由 IH 逆变器和功率因数校正 (PFC) 电路组成，通过增加 IH 逆变器的输入电压将所需功率传输到电位器。在本文中，输入电压旨在获得效率优化的工作点。为了获得合适的输入电压，使用一次谐波近似 (FHA) 进行功率损耗分析。根据分析结果，可选择IH逆变器的输入电压以提高其电源转换效率。实施了一个 2 kW 半桥串联谐振逆变器原型，通过使用具有 2 kW 传输功率的 FHOM 加热铁磁罐和使用具有 1 kW 传输功率的 THOM 加热非铁磁罐来验证所提议设计的有效性转移权力。