基于离散变速趋近律的模糊滑模高频开关电源控制

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Abstract

Small signal model set up by state space averaging method has limitations to the case of set-point varying in larger parameter range. The quasi-linear modeling method is used to model the phase-shift full bridge high frequency switching power supply in this paper. On the basis of this model, a fuzzy sliding mode variable structure controller of the high frequency switching power supply is designed, by selecting linear switching function and control rate according to the variable rate reaching law. The controller is able to overcome the drawbacks of the traditional high frequency switching power supply controller, such as the low dynamic response and non-ideal adjustment of system mutation. The simulation results show that compared to the sliding mode variable structure controller, the proposed controller is better in control effect, robustness and dynamic performance, and also reduces the chattering effectively. The good control to 1.2kW high frequency switching power supply is realized by the proposed controller, which can further prove that the proposed method is effective.

Key words： High frequency switching power supply quasi-linear modeling switching function variable speed reaching law fuzzy sliding mode variable structure control

Received: 22 November 2013 Published: 30 October 2015

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TN624

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	Jiao Shangbin
	Liu Chen
	Huang Weichao
	Liu Ding
	Liang Yanming

Cite this article:

Jiao Shangbin,Liu Chen,Huang Weichao等. Fuzzy Sliding Mode Control of High Frequency Switching Power Supply Based on Discrete-Time Variable Rate Reaching Law[J]. Transactions of China Electrotechnical Society, 2015, 30(20): 108-117.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2015/V30/I20/108

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