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Hybrid mode control for wide range soft-switched full-bridge converter with auxiliary parallel inductor networks

机译:具有辅助并联电感器网络的宽范围软开关全桥转换器的混合模式控制

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摘要

Aiming at the limitations of conventional phase-shifted full-bridge (PSFB) converter, such as, narrow zero-voltage switching (ZVS) range and large duty cycle losses, here, a wide range soft-switched full-bridge (FB) converter using hybrid mode control is proposed. Given using of two auxiliary inductors under light load, the energy that required for soft switching is satisfied and thus, ZVS can be achieved, and, therefore, efficiency of converter can be improved significantly under light load. Furthermore, the duty cycle losses of the secondary side are reduced by using a transformer with the small leakage inductor. Based on these merits, the proposed converter has some advantage for the wide range load variation applications without duty cycle losses. This paper presents the circuit configuration of the proposed converter and analyses its operating principles. Experimental results of an 800 W 200/50 V prototype are presented to validate the effectiveness of the proposed converter.
机译:针对常规相移全桥(PSFB)转换器的局限性,例如狭窄的零电压开关(ZVS)范围和较大的占空比损耗,此处采用宽范围的软开关全桥(FB)转换器提出了使用混合模式控制的方法。如果在轻负载下使用两个辅助电感器,则可以满足软开关所需的能量,因此可以实现ZVS,因此,在轻负载下可以显着提高转换器的效率。此外,通过使用带有小漏感的变压器,可以减少次级侧的占空比损耗。基于这些优点,提出的转换器在宽负载变化应用中具有一些优势,而没有占空比损失。本文介绍了所提出的转换器的电路配置,并分析了其工作原理。提出了800 W 200/50 V原型的实验结果,以验证所提出转换器的有效性。

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