Analysis and design of a load-independent clamped class E inverter

IF 3.2 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Aeu-International Journal of Electronics and Communications Pub Date : 2025-09-10 DOI:10.1016/j.aeue.2025.156034

Yang Wang, Qisheng Qiu, Chao Qi, Wei Wang, Xiyu Mo

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Abstract

This paper proposes a load-independent clamped Class E inverter. Compared to conventional Class E inverters, the proposed topology enables the circuit to achieve Zero-Voltage Switching (ZVS) and maintain a constant output voltage over a wide range of load variations (20 Ω to 50 Ω), without requiring any feedback control loop. Key innovations include replacing the choke inductor with a finite-valued series resonant inductor and introducing a clamping circuit comprising a clamping switch and a large-value clamping capacitor. The working principle and analytical methodology are detailed. A prototype was designed and experimentally validated under the following conditions: operating frequency of 1 MHz, input voltage of 15 V, and nominal load of 20 Ω. Results demonstrate that the topology successfully achieves load-independent constant-voltage output. The measured normalized switch voltage stress is 2.86, and a peak efficiency of 94.4 % is attained at the nominal load.

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负载无关箝位E类逆变器的分析与设计

本文提出了一种负载无关的箝位E类逆变器。与传统的E类逆变器相比，所提出的拓扑结构使电路能够实现零电压开关（ZVS），并在广泛的负载变化范围内保持恒定的输出电压（20 Ω至50 Ω），而不需要任何反馈控制回路。关键创新包括用有限值串联谐振电感代替扼流圈电感，并引入由箝位开关和大值箝位电容器组成的箝位电路。详细介绍了该方法的工作原理和分析方法。在工作频率为1 MHz，输入电压为15 V，标称负载为20 Ω的条件下，设计了样机并进行了实验验证。结果表明，该拓扑结构成功地实现了负载无关的恒压输出。测量的归一化开关电压应力为2.86，在标称负载下达到94.4%的峰值效率。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Aeu-International Journal of Electronics and Communications 工程技术-电信学

CiteScore

6.90

自引率

18.80%

发文量

292

审稿时长

4.9 months

期刊介绍： AEÜ is an international scientific journal which publishes both original works and invited tutorials. The journal''s scope covers all aspects of theory and design of circuits, systems and devices for electronics, signal processing, and communication, including: signal and system theory, digital signal processing network theory and circuit design information theory, communication theory and techniques, modulation, source and channel coding switching theory and techniques, communication protocols optical communications microwave theory and techniques, radar, sonar antennas, wave propagation AEÜ publishes full papers and letters with very short turn around time but a high standard review process. Review cycles are typically finished within twelve weeks by application of modern electronic communication facilities.