Optimal Current Control Method of BLDC Motor Utilizing Maximum Torque Point

  • Park, Chang-Seok (Dept. of advanced engineering, Graduate school Kyungnam University) ;
  • Jang, Jung-Hoon (Dept. of advanced engineering, Graduate school Kyungnam University) ;
  • Jung, Tae-Uk (Dept. of Electrical engineering of Kyungnam University)
  • Received : 2017.05.16
  • Accepted : 2017.06.12
  • Published : 2017.07.31


This paper proposes an optimal current control method for improving efficiency of Brushless Direct Current (BLDC) motor. The proposed optimal current control method is based on the maximum torque point analysis of Finite Element Analysis (FEA). The proposed method can increase the effective voltage at the maximum torque point of BLDC motor and increase the output torque per unit current to increase the efficiency. In order to verify the proposed optimal current control method, have developed the prototype of a 50 [W] class motor drive and experimented by 20 [W] motor using the dynamometer set. This was verified.


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