Abstract This paper suggests a hybrid PWM DC/DC converter comprised of the Full-Bridge (FB) converter and the PWM resonant converter for on-board chargers. It has hybrid characteristics having output characteristics of the FB converter and switching characteristics of the PWM resonant converter. They are coupled in a single transformer so that the power distribution problem which causes increase of the transformer size can be solved. Because the transformer leakage inductance is used as a resonant parameter and the output inductor current ripple is very small, a dissipative snubber circuitry and output current filter can be removed. Zero-voltage-zero-current switching(ZV-ZCS) operation of bottom switches and ZVS operation of top switches can be accomplished by a proper design of the resonant parameter. The feasibility of the proposed charger is verified with a 6.6 kW prototype.

中文翻译：

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混合 PWM DC/DC 转换器，用于带单变压器的 EV 车载充电器

摘要 本文提出了一种由全桥 (FB) 转换器和 PWM 谐振转换器组成的混合 PWM DC/DC 转换器，用于车载充电器。它具有FB转换器的输出特性和PWM谐振转换器的开关特性的混合特性。它们耦合在单个变压器中，从而可以解决导致变压器尺寸增加的配电问题。由于变压器漏电感用作谐振参数，并且输出电感电流纹波非常小，因此可以去除耗散缓冲器电路和输出电流滤波器。通过适当设计谐振参数可以实现底部开关的零电压零电流开关（ZV-ZCS）操作和顶部开关的 ZVS 操作。