The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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Cogging Torque Reduction Method of a Single-Phase BLDC Motor using Asymmetric Sloping Notch

비대칭 Sloping 노치를 적용한 단상 BLDC 전동기의 코깅토크 저감 방법

  • Park, Young-Un (Major of Electrical Engineering & GREEN ENERGY Research Institute, Sunchon national University) ;
  • So, Ji-Young (Major of Electrical Engineering & GREEN ENERGY Research Institute, Sunchon national University) ;
  • Woo, Kyung il (Dept. of Electrical Engineering, Pukyong National University) ;
  • Kim, Dae-Kyong (Dept. of Electrical Control Engineering & GREEN ENERGY Research Institute, Sunchon national University)
  • Received : 2017.08.18
  • Accepted : 2017.10.30
  • Published : 2017.11.01
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Abstract

This paper studied cogging torque reduction effect for sloping notch applied two notches on stator teeth. We have confirmed accuracy of FEM(Finite Element Method) through comparison previous model using asymmetric notch for experiment and 3D FEM results, and then cogging torque comparison of previous model and sloping notch model. Also the sloping notch model has been modified to step-sloping notch model to consider manufactur. The modification method of sloping notch changed the degree of slope of notch (a)(Notch(a) sloping Deg) and the degree of Slope of notch (b)(Notch(b) Sloping Deg). When Cogging torque is case of minimum, Notch (a) Sloping Deg is $-12[^{\circ}]$ and Notch(b) Sloping Deg $12[^{\circ}]$. In this case, cogging torque was about 23.9[mNm]. Cogging torque of previous model is about 40.8[mNm], so sloping notch model is less than previous model by 41.42[%]. Also, if sloping notch model is changed to step-sloping notch model, cogging torque of step-sloping notch model is about 24.82[mNm], Therefore the difference between the two cogging torque is about 3.85[%], so step-sloping notch model can be applied when considering manufacture.

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References

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