Transactions of China Electrotechnical Society  2018, Vol. 33 Issue (10): 2293-2302    DOI: 10.19595/j.cnki.1000-6753.tces.170229
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A PWM Full Order Robustness Sliding Mode Control for Phase-Shifted Full-Bridge Converter
Gao Ming, Wang Dazhi, Li Zhao
College of Information Science and Engineering Northeastern University Shenyang 110819 China;

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Abstract  The traditional phase-shifted full-bridge converter uses the method of period averaging model to design linear control links, which cannot satisfy the robustness demand for distributed power supply. This paper proposed a PWM full order sliding mode control for phase-shifted full-bridge with four subsystems. Based on the equivalent dynamic model of PSFB, the integral element is introduced in the sliding surface to eliminate the steady-state error. Meanwhile, the analysis of the sliding mode motion in the state space and its strict existence conditions were carried out, and the equivalent PWM control function was provided. On the basis of the equivalent function, the switching control was involved and the robustness conditions were analyzed. The experimental results show that the proposed control strategy can not only improve the robustness and adjusting performance, but also fix switching frequency to avoid the frequency changes when the operating conditions change.
Key wordsPhase-shifted full-bridge      full order sliding mode control      fixed switching frequency      PWM sliding mode control      robustness     
Received: 22 April 2017      Published: 24 May 2018
PACS: TM422  
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Gao Ming
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Gao Ming,Wang Dazhi,Li Zhao. A PWM Full Order Robustness Sliding Mode Control for Phase-Shifted Full-Bridge Converter[J]. Transactions of China Electrotechnical Society, 2018, 33(10): 2293-2302.
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