Capacitor charge balance control strategy of Buck converter

2009 IEEE 6th International Power Electronics and Motion Control Conference Pub Date : 2009-05-17 DOI:10.1109/IPEMC.2009.5157441

Yaai Chen, Jinghua Zhou, Weiping Zhang, Weihai Li, S. Xie

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引用次数: 4

Abstract

Taking Buck converter for example, this paper studies the non-linear characteristics and capacitance charge-balance control strategy of switching regulations systems under large-signal disturbance. In order to reduce the transient overshoot and recovery time of the output voltage under large-signal disturbance, the paper adopts capacitive charge-balance principle, deduces a new digital control algorithm and builds the MATLAB simulation model for this control algorithm. The simulation results show that the algorithm can optimize the response of the converter and improve the dynamic performances when the load current changes suddenly. Based on TMS320F28335 digital signal processor (DSP), a prototype is developed and its output power is 60W. Through the prototype, the capacitive charge-balance control strategy is verified under large-signal disturbance. The experimental results show this kind of control strategy is suitable to the large signal condition and provide a new method for controlling and dealing with the system in large-signal condition.

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Buck变换器电容电荷平衡控制策略

本文以Buck变换器为例，研究了大信号干扰下开关调节系统的非线性特性和电容电荷平衡控制策略。为了减少输出电压在大信号干扰下的瞬态超调和恢复时间，本文采用电容式电荷平衡原理，推导出一种新的数字控制算法，并建立了该控制算法的MATLAB仿真模型。仿真结果表明，该算法可以优化变换器在负载电流突变时的响应，提高变换器的动态性能。基于TMS320F28335数字信号处理器(DSP)，研制了输出功率为60W的样机。通过样机验证了电容式电荷平衡控制策略在大信号干扰下的有效性。实验结果表明，这种控制策略适用于大信号条件，为系统在大信号条件下的控制和处理提供了一种新的方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2009 IEEE 6th International Power Electronics and Motion Control Conference

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