The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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Reduction of Current Distortion in PWM Inverter by Variable DC-link Voltage of DC-DC Converter for FCEV

FCEV 구동용 DC-DC 컨버터 가변 DC-link 전압 제어에 의한 PWM 인버터의 전류 왜곡 저감

  • Ko, An-Yeol (School of Info. and Comm. Eng., Sungkyunkwan University) ;
  • Kim, Do-Yun (School of Info. and Comm. Eng., Sungkyunkwan University) ;
  • Lee, Jung-Hyo (Automotive Components Development 4 Team. LG Innotek) ;
  • Kim, Young-Real (Dept. of Electric. & Electron. Eng., Anyang University) ;
  • Won, Chung-Yuen (School of Info. and Comm. Eng., Sungkyunkwan University)
  • Received : 2014.05.07
  • Accepted : 2014.10.30
  • Published : 2014.12.20
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Abstract

A design and control method of DC/DC converter, which can control variable DC-link voltage to drive a fuel cell electric vehicle (FCEV), is proposed in this study. Given that a fuel cell has low-voltage and high-current characteristics, the required voltage for operating motor must be output through the DC/DC boost converter in the system to drive an FCEV. The proposed converter can choose the output voltage of battery or fuel cell in consideration of the driving mode, as well as control DC-link voltage in accordance with the back electromotive force. The switching lag-time to prevent shortage of pulse-width modulation inverter arms makes distorted current waveform caused by voltage distortion. Through this control method, the proposed converter can reduce the output voltage distortion and current ripple of the inverter, thereby reducing the distorted torque. Simulations and experimental results are presented to verify the reliability of the proposed DC/DC converter.

Keywords

References

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