Novel Control Method for Hysteresis-band Current with Quasi-constant Frequency based on Current Change Rate

doi:10.11930/j.issn.10.11930.2015.1.127

Abstract

Abstract: Switching frequency of hysteresis-band current control is inconstant, which leads to the difficulties of filter design and the problem of sampling rate. On the basis of analyzing the relationship between hysteresis-band and switching frequency, a novel hysteresis-band current control method with quasi-constant frequency based on current change rate is proposed to solve this problem. With rapid response and good stability, the proposed method can adjust the hysteresis band according to the current change rate so as to keep the switching frequency constant. As this method doesn’t require the information about the system’s parameters, it is simple and easy to be implemented. Simulation and experimental results have validated the method’s effectiveness.

Key words: non-linear control, variable band-width, converter, hysteresis-band current control, switching frequency, direct current control, quasi-constant frequency

CLC Number:

GU Zhenjiang, LU Yi, HU Yinghong, LIU Shaoyu. Novel Control Method for Hysteresis-band Current with Quasi-constant Frequency based on Current Change Rate[J]. journal1, 2015, 48(1): 127-130.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.10.11930.2015.1.127

https://www.electricpower.com.cn/EN/Y2015/V48/I1/127

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