谷值电流型脉冲序列控制反激变换器分析

发布时间：2018-08-14 12:16

【摘要】：工作于电感电流连续导电模式(CCM)的脉冲序列控制反激变换器存在的低频振荡现象,严重影响了脉冲序列控制开关变换器的稳态及瞬态性能。为消除该低频振荡现象,提出了开关变换器的谷值电流型脉冲序列控制技术。在一个开关周期内,谷值电流型脉冲序列控制开关变换器的励磁电感储能变化量为零,有效解决了脉冲序列控制CCM反激变换器的低频振荡问题。论文对谷值电流型脉冲序列控制CCM反激变换器的工作原理及控制策略进行了系统、深入的分析。研究了不同负载时控制脉冲循环周期内的脉冲组合方式和输出电压纹波。设计实现了谷值电流型脉冲序列控制器,仿真与实验结果验证了理论分析的正确性及控制器设计的可行性。
[Abstract]:The low frequency oscillation of the flyback converter based on the pulse sequence control of the inductance current continuous conducting mode (CCM) seriously affects the steady and transient performance of the pulse sequence controlled switching converter. In order to eliminate the low frequency oscillation, a valley current mode pulse sequence control technique for switching converter is proposed. In a switching cycle, the change of excitation inductance energy storage of the switching converter with valley current mode pulse sequence control is zero, which effectively solves the low frequency oscillation problem of CCM flyback converter controlled by pulse sequence. In this paper, the working principle and control strategy of CCM flyback converter controlled by valley current mode pulse sequence are systematically analyzed. The pulse combination mode and output voltage ripple in the control pulse cycle with different loads are studied. The valley current pulse sequence controller is designed and implemented. The simulation and experimental results verify the correctness of the theoretical analysis and the feasibility of the controller design.
【作者单位】：磁浮技术与磁浮列车教育部重点实验室西南交通大学电气工程学院;
【基金】：国家自然科学基金资助项目(51177140、61371033)
【分类号】：TM46

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