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International Journal of Rotating Machinery
Volume 2017 (2017), Article ID 4854169, 9 pages
Research Article

Research and Modeling of the Bidirectional Half-Bridge Current-Doubler DC/DC Converter

School of Automation, Wuhan University of Technology, Wuhan, China

Correspondence should be addressed to Xinchao Dong; moc.qq@429194304

Received 19 October 2016; Revised 18 December 2016; Accepted 4 January 2017; Published 1 February 2017

Academic Editor: Qiaoling Tong

Copyright © 2017 Liang Huang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Due to its high step-up voltage ratio, high utilization rate, and good stability, the bidirectional half-bridge current-doubler topology is widely used in lithium battery system. This paper will further analyze the bidirectional half-bridge current-doubler topology. Taking into account the fact that the current is not equal to the two times current inductance may lead to a greater transformer magnetizing current leaving the transformer core saturation occurring. This paper will focus on the circuit modeling of steady-state analysis and small signal analysis, analyzing the influence parameters for the inductor current by steady-state model and analyzing the stability of the system by the small signal model. The PID controllers and soft start algorithm are designed. Then the influence of circuit parameters on the steady state and the effect of soft start algorithm is verified, and finally the function of the soft start algorithm is achieved by the experimental prototype.