A Novel Compensator for Eliminating DC Magnetizing Current Bias in Hybrid Modulated Dual Active Bridge Converters

Yunpeng Yao; Shen Xu; Weifeng Sun; Shengli Lu

A Novel Compensator for Eliminating DC Magnetizing Current Bias in Hybrid Modulated Dual Active Bridge Converters

Vol. 16, No. 5, pp. 1650-1660, Sep. 2016

10.6113/JPE.2016.16.5.1650

DC bias

Dual active bridge converter

Efficiency

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Abstract

This paper proposes a compensator to eliminate the DC bias of inductor current. This method utilizes an average-current sensing technique to detect the DC bias of inductor current. A small signal model of the DC bias compensation loop is derived. It is shown that the DC bias has a one-pole relationship with the duty cycle of the left side leading lag. By considering the pole produced by the dual active bridge (DAB) converter and the pole produced by the average-current sensing module, a one-pole-one-zero digital compensation method is given. By using this method, the DC bias is eliminated, and the stability of the compensation loop is ensured. The performance of the proposed compensator is verified with a 1.2-kW DAB converter prototype.

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Cite this article

[IEEE Style]

Y. Yao, S. Xu, W. Sun, S. Lu, "A Novel Compensator for Eliminating DC Magnetizing Current Bias in Hybrid Modulated Dual Active Bridge Converters," Journal of Power Electronics, vol. 16, no. 5, pp. 1650-1660, 2016. DOI: 10.6113/JPE.2016.16.5.1650.

[ACM Style]

Yunpeng Yao, Shen Xu, Weifeng Sun, and Shengli Lu. 2016. A Novel Compensator for Eliminating DC Magnetizing Current Bias in Hybrid Modulated Dual Active Bridge Converters. Journal of Power Electronics, 16, 5, (2016), 1650-1660. DOI: 10.6113/JPE.2016.16.5.1650.