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引用次数: 18
摘要
分布式能源(DERs)的应用需要高电压增益升压DC-DC转换器。提出了一种具有任意正整数高增益比的双向开关电容器(SC)变换器。这些变换器效率高，易于控制，输出电压纹波小于1%。所提出的转换器还能够提供双向电力，这是电池存储应用的关键要求。建立了输入电压为20 V、输出功率为100 W、输出频率为75 kHz的9倍SC变换器样机并进行了测试。实验结果表明，在无驱动损耗的情况下，9倍SC变换器的最大效率可达98%以上，在25 W ~ 100 W的整个负载范围内，考虑驱动损耗，效率可达95.5%以上。
Family of cascaded high-voltage-gain bidirectional switched-capacitor DC-DC converters
High-voltage-gain step-up DC-DC converters are required for the applications of distributed energy resources (DERs). A family of bidirectional switched-capacitor (SC) converters with high gain ratio of any positive integer are proposed in this paper. These converters are of high efficiency, easy to control, and are with low output voltage ripple of less than 1%. The proposed converters are also capable of delivering bidirectional power, which is a key requirement for the applications with battery storage. A prototype of 9-time SC converter at 20 V input voltage, 100 W output, 75 kHz, is built and tested. Experiment results show that the maximum efficiency of the 9-time SC converter is over 98% without driver's loss and the efficiency over the entire load range between 25 W and 100 W is over 95.5% including the driver's loss.
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