Piecewise Linear Approximation Minimum Current Trajectory for Dual Active Full-bridge Bidirectional DC-DC Converter

Luo, NY;Wen, HQ;Bu, QL

[Luo, Ningyu; Wen, Huiqing; Bu, Qinglei] Xian Jiaotong Liverpool Univ, Dept Elect & Elect Engn, Suzhou 215123, Peoples R China.

2020 IEEE 9TH INTERNATIONAL POWER ELECTRONICS AND MOTION CONTROL CONFERENCE (IPEMC2020-ECCE ASIA)

Pages:2446-2451

DOI:10.1109/IPEMC-ECCEAsia48364.2020.9367989

Publication Year:2020

Document Type:Conference Paper

Identifier:http://hdl.handle.net/20.500.12791/001599

Abstract

This paper will introduce a controller based on the piecewise linear approximation minimum current trajectory(PWL-MCT) for the series resonant dual active-bridge(SR-DAB) dc-dc converters based on the minimum current trajectory(MCT). The linear approximation is based on the minimum current trajectory, thus it can maintain an approximately optimized switching loss at full working range. The power flow through the Dual active-bridge DC-DC converter is controlled by adjusting the duty factor for both primary side and secondary side of the converter and the phase shifting angle between each side s voltage signal simultaneously. While applying the proposed controller, the tank rms current optimizing effect of this converter was proved to perform closely enough to the one applied with original minimum current trajectory controller.

Keywords

tank rms current minimum current trajectory series resonant piecewise linear approximation DAB

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