Design, Analyses and Validation of Sliding Mode Control for a DAB DC-DC Converter

Zou, Shenli; Zheng, Sheng; Chinthavali, Madhu Sudhan

doi:10.1109/ITEC.2019.8790590

Design, Analyses and Validation of Sliding Mode Control for a DAB DC-DC Converter

Conference · Sat Jun 01 00:00:00 EDT 2019

DOI:https://doi.org/10.1109/ITEC.2019.8790590· OSTI ID:1570129

Zou, Shenli ^[1]; ^[2]; ^[2]

University of Maryland, College Park
ORNL

In this paper, a comprehensive voltage control loop design for a dual active bridge (DAB)DC-DC converter is proposed using the sliding mode control (SMC), where the coefficients are formed to ensure both small signal and large signal stability of the system. The major objectives of the proposed SMC are to enhance the converter dynamics and attain a tight output voltage regulation under fast load fluctuations or during start-up. In addition, dynamic performance of the system is examined considering the steady state error and overshoot. The proposed control method is capable of achieving soft-switching operation by determining the effective duty phase displacement range. To verify the proposed method, a hardware prototype of a DAB converter is developed and evaluated, and the effectiveness of the loop design is validated by the experiment. It is observed that overshoot is eliminated in the start-up test and the fast settling time is achieved.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC05-00OR22725

OSTI ID:: 1570129

Country of Publication:: United States

Language:: English

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