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Development of Digital Control for High Power Permanent-Magnet Synchronous Motor Drives

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  • Ming-Hung Chen
  • Hao-Ting Tseng

Abstract

This paper is concerned with the development of digital control system for high power permanent-magnet synchronous motor (PMSM) to yield good speed regulation, low current harmonic, and stable output speed. The design of controller is conducted by digitizing the mathematical model of PMSM using impulse invariance technique. The predicted current estimator, which is insensitive to motor feedback currents, is proposed to function under stationary frame for harmonic current suppression. In the AC/DC power converter, mathematical model and dc -link voltage limit of the three-phase switch-mode rectifier are derived. In addition, a current controller under synchronous frame is introduced to reduce the current harmonics and increase the power factor on the input side. A digital control system for 75 kW PMSM is realized with digital signal processor (R5F5630EDDFP). Experimental results indicate that the total harmonic distortion of current is reduced from 4.1% to 2.8% for 50 kW output power by the proposed predicted current estimator technique.

Suggested Citation

  • Ming-Hung Chen & Hao-Ting Tseng, 2014. "Development of Digital Control for High Power Permanent-Magnet Synchronous Motor Drives," Mathematical Problems in Engineering, Hindawi, vol. 2014, pages 1-10, June.
    • Handle: RePEc:hin:jnlmpe:926727
    DOI: 10.1155/2014/926727
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