An improved LLC resonant converter with phase-shift controlled dynamic series-parallel reconfiguration-windings for hold-up applications
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所属单位：自动化学院
发表刊物：Conf Proc IEEE Appl Power Electron Conf Expo APEC
摘要：This paper presents an improved LLC resonant converter with phase-shift controlled dynamic series-parallel reconfiguration windings for applications with hold-up time requirement, such as distributed power systems and server supplies. By adding two diodes to the secondary-side rectifiers, the structure of the secondary-side windings can be reconfigured to provide the regulated output voltage with phase-shift control. When the phase-shift angle achieves 180°, maximum voltage gain can achieve up to twice as normal operation. Since the converter always operates around the resonant frequency in normal state, high efficiency can be achieved. Without considering the voltage gain requirement, soft-switching of normal operation is the only consideration when designing the magnetizing inductance. Therefore, circulating current and conduction losses induced by the magnetizing inductance can be reduced significantly. Operation principles, characteristics and design considerations are discussed in detail. Experimental results are given to verify the effectiveness and advantages of the converter. © 2019 IEEE.
是否译文：否
发表时间：2019-05-24
合写作者：Tang, Xinxi,吴红飞,Sun, Kai,Ma, Xudong
通讯作者：Tang, Xinxi,邢岩