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Fault Tolerant Control Methods for Dual Type Independent Multi-Phase BLDC Motor under the Open-Switch Fault Conditions

  • Kim, Yong-Hyu (Automotive Parts Technology Support Center) ;
  • Heo, Hong-Jun (Dept. of Electrical Engineering, Pusan National University) ;
  • Park, June-Ho (Dept. of Electrical Engineering, Pusan National University) ;
  • Kim, Jang-Mok (Dept. of Electrical Engineering, Pusan National University)
  • Received : 2017.06.20
  • Accepted : 2017.11.06
  • Published : 2018.03.01

Abstract

Dual type Independent multi-phase BLDC Motor (DI-BLDCM) is designed to be robust to faulty conditions of motor and drive system. Despite the efforts of the motor design, open-switch faults of DI-BLDCM drive system cause the torque ripple of the motor. This torque ripple makes unwanted sound noise and mechanical vibration of associated systems. This paper proposes four methods for compensating the torque ripple and compares the characteristics of each proposed method. All proposed methods are able to reduce the torque ripple to similar level of the healthy condition, although the motor operates in open-switch fault conditions. However, these methods have different characteristics in various fault conditions. Therefore, from the results of the comparison, the suitable method is selected for the various fault conditions. The feasibility of the proposed methods is proved by the several experimental results.

Acknowledgement

Supported by : Korea Institute of Energy Technology Evaluation and Planning

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