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The Korean Institute of Electrical Engineers (대한전기학회)
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Output Characteristic Comparison of BLDC Motor for Water Circulation System According to Sensorless Control Methods

물 순환 시스템용 BLDCM의 센서리스 제어 방식에 따른 출력 특성 비교

  • Kim, Sung-An (Dept. of Electrical Engineering, Dong-A University) ;
  • Cho, Yun-Hyun (Dept. of Electrical Engineering, Dong-A University)
  • Received : 2017.02.24
  • Accepted : 2017.08.24
  • Published : 2017.09.01
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Abstract

The sensorless control of blushless DC motor(BLDCM) is based on the $120^{\circ}$ control in which the back electromotive force(Back EMF) for estimating the position of the rotor can be detected. However, the $120^{\circ}$ control has a disadvantage that the torque constant is small as compared with $180^{\circ}$ control which can not detect the back EMF. The $150^{\circ}$ control which complements these problems makes it possible to detect the back EMF and improve the torque constant by 12.5% compared to the $120^{\circ}$ control. Therefore, this paper compares the output characteristics of BLDCM through finite element method analysis (FEA) by the conventional and proposed control methods of BLDCM for water circulation system and proposes design for downsizing and weight reduction of BLDCM according to secured torque constant. The validity of the proposed control and design proposal is proved through simulation and experimental results by comparing the output characteristics of $120^{\circ}$ control and $150^{\circ}$ control.

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References

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