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单周期控制Cuk变换器的启动问题与解决方案

, PP. 30-34

Keywords: Cuk变换器,单周期控制,启动问题,全局稳定性,辅助时钟

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Abstract:

开关变换器的单周期控制技术具有动态响应快、开关频率固定、输入扰动抑制能力强等特点.将单周期控制用于一些拓扑结构较复杂的变换器时,会给变换器的启动带来问题.首先分析了单周期控制Cuk变换器的启动问题,然后结合变换器的全局稳定性,采用固定占空比控制的辅助方案,很好地解决了启动问题,实现了Cuk变换器的单周期控制.最后对提出的解决方案进行了仿真分析和实验验证,仿真和实验结果均表明解决方案是正确与有效的.

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