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首页> 外文会议>9th International Conference on Power Electronics-ECCE Asia >Soft-switching single stage isolated AC-DC converter for single-phase high power PFC applications
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Soft-switching single stage isolated AC-DC converter for single-phase high power PFC applications

机译：用于单相大功率PFC应用的软开关单级隔离式AC-DC转换器

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In this paper, a novel single-stage isolated AC-DC converter is proposed for single-phase high power PFC applications. The circuit is derived by combining the boost converter and the matrix-based isolated AC-DC converter. Compare to traditional PFC plus DC/DC configuration, this topology has no diode front end and the number of semiconductors in the current path is minimized. Thus the conduction loss is decreased. By adding a small clamping capacitor and two small size commutation inductors, softswitching for all switches can be realized. Thus the system efficiency can be significantly improved. Furthermore, traditional PWM technology can be applied. Problems of resonant based soft-switching converters including large EMI filter size, high devices voltage and current stress, and low light load efficiency can be avoided. In this paper, the topology derivation and circuit operational analysis are given. The control strategy is introduced and a simulation is carried out to verify the circuit.
机译：本文针对单相大功率PFC应用提出了一种新型的单级隔离式AC-DC转换器。该电路是通过组合升压转换器和基于矩阵的隔离式AC-DC转换器而得出的。与传统的PFC加DC / DC配置相比，该拓扑没有二极管前端，并且电流路径中的半导体数量得以最小化。因此，减小了传导损耗。通过增加一个小型钳位电容器和两个小型换向电感器，可以实现所有开关的软开关。因此，可以显着提高系统效率。此外，可以应用传统的PWM技术。可以避免基于谐振的软开关转换器出现的问题，包括较大的EMI滤波器尺寸，较高的器件电压和电流应力以及较低的轻负载效率。本文给出了拓扑推导和电路运行分析。介绍了控制策略，并进行了仿真以验证电路。

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