Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Torque Maximization Control of 3-Phase BLDC Motors in the High Speed Region

  • Im, Won-Sang (School of Electrical Engineering, Pusan National University) ;
  • Kim, Jong-Pil (Mechanization Research Department, Automation Research Center, Institute of Industrial Technology, Samsung Heavy Industries Co., Ltd.) ;
  • Kim, Jang-Mok (School of Electrical Engineering, Pusan National University) ;
  • Baek, Kwang-Ryul (School of Electrical Engineering, Pusan National University)
  • Received : 2009.10.26
  • Published : 2010.11.20
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Abstract

This paper proposes a new torque control algorithm for BLDC motors to get the maximum torque in the high speed region. The delay of the phase currents is severe due to the stator reactance. The torque fluctuations of BLDC motors increase and the average torque is decreases due to a slow rise in the phase current when compared to the back EMF. In this paper, the phase current of BLDC motors under the high speed condition is analyzed and a torque maximization control is developed on the basis of using numerical analysis. Computer simulations and experimental results show the usefulness of the proposed control algorithm.

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References

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