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

  • 제17권5호
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  • Pages.401-408
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  • 2012
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  • 1229-2214(pISSN)
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  • 2288-6281(eISSN)
전력전자학회 (The Korean Institute of Power Electronics)
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IPMSM 드라이브에서 전류 기울기 정보를 이용한 데드타임 및 인버터 비선형성 효과의 간단한 제거 기법

Simple On-line Elimination Strategy of Dead Time and Nonlinearity in Inverter-fed IPMSM Drive Using Current Slope Information

  • Park, Dong-Min (Dept. of Electrical Engineering and Information System Engineering, Seoul National Univ. of Science and Technology) ;
  • Kim, Myung-Bok (Automotive Components R&D Group, Korea Institute of Industrial Technology) ;
  • Kim, Kyeong-Hwa (Dept. of Electrical Engineering and Information System Engineering, Seoul National University of Science and Technology)
  • 투고 : 2012.06.19
  • 심사 : 2012.07.25
  • 발행 : 2012.10.20
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초록

A simple on-line elimination strategy of the dead time and inverter nonlinearity using the current slope information is presented for a PWM inverter-fed IPMSM (Interior Permanent Magnet Synchronous Motor) drive. In a PWM inverter-fed IPMSM drive, a dead time is inserted to prevent a breakdown of switching device. This distorts the inverter output voltage, resulting in a current distortion and torque ripple. In addition to the dead time, inverter nonlinearity exists in switching devices of the PWM inverter, which is generally dependent on operating conditions such as the temperature, DC link voltage, and current. The proposed scheme is based on the fact that the d-axis current ripple is mainly caused by the dead time and inverter nonlinearity. To eliminate such an influence, the current slope information is determined. The obtained current slope information is processed by the PI controller to estimate the disturbance caused by the dead time and inverter nonlinearity. The overall system is implemented using DSP TMS320F28335 and the validity of the proposed algorithm is verified through the simulation and experiments. Without requiring any additional hardware, the proposed scheme can effectively eliminate the dead time and inverter nonlinearity even in the presence of the parameter uncertainty.

키워드

참고문헌

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