Journal of Magnetics

The Korean Magnetics Society (한국자기학회)
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A Design Optimization of Asymmetric Air-gap Structure for Small 3-phase Permanent Magnet SPM BLDC Motor

  • Kam, Seung-Han (Department of Electrical Engineering, Kyungnam University) ;
  • Jung, Tae-Uk (Department of Electrical Engineering, Kyungnam University)
  • Received : 2015.02.03
  • Accepted : 2015.03.19
  • Published : 2015.03.31
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Abstract

As many researchers are relentlessly trying to improve the power generation schemes from the power grid, to meet the constantly increasing electricity demand. In this paper, the results of a finite element analysis are carried out to study on a design optimization of an asymmetric air-gap structure in 3-phase Permanent Magnet Brushless DC Motors. To achieve a high efficiency for a 3-phase PM BLDC motor, the asymmetric air-gap structure is proposed considering the rotation direction of a motor. Generally, a single-phase BLDC motor is applied asymmetric air-gap structure for starting. This is because the asymmetric air-gap structure causes reluctance variation so the motor can utilize reluctance torque toward a rotation direction. In this paper, the asymmetric air-gap is applied to 3-phase BLDC SPM motor so it utilizes reluctance torque with alignment torque. A proposed model is designed by 2-D FE analysis and the results are verified by experimental test.

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Cited by

  1. Effect of Geometrical Parameters on Optimal Design of Synchronous Reluctance Motor vol.21, pp.4, 2016, https://doi.org/10.4283/JMAG.2016.21.4.544