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开关DC/DC变换器多级脉冲调节控制方法

, PP. 107-113

Keywords: 开关DC/DC变换器,多级脉冲调节,控制方法,Buck变换器,电流断续模式

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Abstract:

提出了一种新型的开关DC/DC变换器控制方法——多级脉冲调节(MPA)控制方法。MPA控制器在每个开关周期起始时刻根据变换器的输出电压误差,在强弱等级不同的多级脉冲中选取一个作为该周期的有效控制信号。文中分析和讨论了MPA控制原理,研究了工作于电流断续模式的MPA控制Buck变换器的工作过程和小信号模型。分析结果表明,MPA控制具有优异的鲁棒性、瞬态特性和稳态特性。仿真和实验结果验证了理论分析的正确性。

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