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A High Power Density Integrated Charger for Electric Vehicles with Active Ripple Compensation

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  • Liwen Pan
  • Chengning Zhang

Abstract

This paper suggests a high power density on-board integrated charger with active ripple compensation circuit for electric vehicles. To obtain a high power density and high efficiency, silicon carbide devices are reported to meet the requirement of high-switching-frequency operation. An integrated bidirectional converter is proposed to function as AC/DC battery charger and to transfer energy between battery pack and motor drive of the traction system. In addition, the conventional H-bridge circuit suffers from ripple power pulsating at second-order line frequency, and a scheme of active ripple compensation circuit has been explored to solve this second-order ripple problem, in which a pair of power switches shared traction mode, a ripple energy storage capacitor, and an energy transfer inductor. Simulation results in MATLAB/Simulink validated the eligibility of the proposed topology. The integrated charger can work as a 70 kW motor drive circuit or a converter with an active ripple compensation circuit for 3 kW charging the battery. The impact of the proposed topology and control strategy on the integrated charger power losses, efficiency, power density, and thermal performance has also been analysed and simulated.

Suggested Citation

  • Liwen Pan & Chengning Zhang, 2015. "A High Power Density Integrated Charger for Electric Vehicles with Active Ripple Compensation," Mathematical Problems in Engineering, Hindawi, vol. 2015, pages 1-18, November.
    • Handle: RePEc:hin:jnlmpe:918296
    DOI: 10.1155/2015/918296
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