PWM-Based Sliding Mode Controller for Three-Level Full-Bridge DC-DC Converter that Eliminates Static Output Voltage Error

This paper proposes a pulse width modulation (PWM)-based sliding mode controller (SMC) for a full-bridge DC-DC converterthat can eliminate static output voltage error. Hysteretic SMC in DC-DC converter does not have a fixed switching frequency, andapplying hysteretic SMC to full-bridge converters is difficult. Fixed-frequency SMC, which is also called PWM-based SMC, basedon equivalent control overcomes these shortcomings. However, the controller order reduction in equivalent control in PWM-basedSMC causes static output voltage error. To resolve this issue, an integral item is added to the PWM-based SMC. Sliding modecoefficients are designed by applying a standard second-order system to the sliding mode surface. The effect of adding an integralitem on the controller is analyzed, and an integral coefficient design method is proposed. Experiment results on a three-levelfull-bridge DC-DC converter verify the control scheme and design method proposed in this paper.

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Cite this article

[IEEE Style]

J. Liu, F. Xiao, W. Ma, X. Fan, W. Chen, "PWM-Based Sliding Mode Controller for Three-Level Full-Bridge DC-DC Converter that Eliminates Static Output Voltage Error," Journal of Power Electronics, vol. 15, no. 2, pp. 378-388, 2015. DOI: 10.6113/JPE.2015.15.2.378.

[ACM Style]

Jilong Liu, Fei Xiao, Weiming Ma, Xuexin Fan, and Wei Chen. 2015. PWM-Based Sliding Mode Controller for Three-Level Full-Bridge DC-DC Converter that Eliminates Static Output Voltage Error. Journal of Power Electronics, 15, 2, (2015), 378-388. DOI: 10.6113/JPE.2015.15.2.378.