Application of Improved Bridgeless Power Factor Correction Based on One-cycle Control in Electric Vehicle Charging System

Abstract

In view of high power factor and high efficiency requirements in electric vehicle charging systems, an improved bridgeless power factor correction based on one-cycle control in the pre-regulator is proposed in this article. First, the working principle of a boost power factor correction converter and a one-cycle control strategy are analyzed. Second, a simulation model is built by MATLAB/Simulink (The MathWorks, Natick, Massachusetts, USA), and an experimental plant is developed by electron devices. Finally, simulation and experiment results show that the power factor of the front-end circuit in charging system amounts to more than 0.99, and the total harmonic distortion of current is less than 4%. The efficiency is greatly improved, and pre-stabilized output voltage is achieved. The proposed topology can facilitate the design of the DC/DC circuit in the final stage.

Keywords:

• electric vehicle charging system
• one-cycle control
• bridgeless power factor correction
• improved bridgeless boost topology

Acknowledgments

This work was partially supported by the National Natural Science Foundation of China (grant 61105030), the Fundamental Research Funds for the Central Universities (ZYGX2011J021), and the Scientific and Technical Supporting Programs of Sichuan Province (2013GZ0054).