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Control Method for Phase-Shift Full-Bridge Center-Tapped Converters Using a Hybrid Fuzzy Sliding Mode Controller

Department of Electrical and Computer Engineering, Ajou University, 206, World cup-ro, Yeongtong-gu, Suwon 16499, Korea
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Electronics 2019, 8(6), 705; https://doi.org/10.3390/electronics8060705
Received: 15 May 2019 / Revised: 18 June 2019 / Accepted: 21 June 2019 / Published: 22 June 2019
(This article belongs to the Section Power Electronics)
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Abstract

This paper presents a control method for phase-shift full-bridge center-tapped (PSFB-CT) converters using hybrid fuzzy sliding mode controllers (SMCs). Conventionally, the output voltage of a PSFB-CT converter is controlled by using a proportional-integral (PI) controller. However, the dynamic characteristic of the converter is undesirable, and the converter is not robust to disturbances. In order to overcome these disadvantages, the SMC based on PI control has been applied for the PSFB-CT converter. However, there is a chattering problem when the SMC gain is increased to improve the dynamic characteristic. In this paper, a control method for the PSFB-CT converter using fuzzy logic control is proposed. By varying the gain of the SMC through the fuzzy logic control, not only can the dynamic characteristic of the PSFB-CT converter be improved, but the chattering problem can also be relieved. The effectiveness of the proposed control method for the PSFB-CT converter was verified by the simulation and experimental results. View Full-Text
Keywords: insulated DC/DC converter; phase-shift full-bridge center-tapped (PSFB-CT) converter; sliding mode controller (SMC); fuzzy logic control insulated DC/DC converter; phase-shift full-bridge center-tapped (PSFB-CT) converter; sliding mode controller (SMC); fuzzy logic control
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Lee, Y.J.; Bak, Y.; Lee, K.-B. Control Method for Phase-Shift Full-Bridge Center-Tapped Converters Using a Hybrid Fuzzy Sliding Mode Controller. Electronics 2019, 8, 705.

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