Journal of Magnetics

The Korean Magnetics Society (한국자기학회)
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Design and Torque Ripple Analysis of Brush-less DC Motor According to Delta Winding Connection

  • Lee, Tae-Yong (Department of Electrical and Computer Engineering, Sungkyunkwan University) ;
  • Seo, Myung-Ki (Department of Electrical and Computer Engineering, Sungkyunkwan University) ;
  • Kim, Yong-Jae (Department of Electrical Engineering, Chosun University) ;
  • Jung, Sang-Yong (Department of Electrical and Computer Engineering, Sungkyunkwan University)
  • Received : 2015.01.22
  • Accepted : 2015.06.10
  • Published : 2015.06.30
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Abstract

In this study, we describe the design method of a Brush-less DC (BLDC) motor with delta winding connection. After designing delta winding connection model with the $60^{\circ}$ flat-top region of the Back Electro-Motive Force (BEMF), an ideal current source analysis and a voltage source analysis, with a 6-step control, were conducted primarily employing Finite Element Method. In addition, as a current controller, we considered the Current Regulator with PI controller using Simulink for the comparison of torque characteristics. When the input current is controlled, the switching regions and reference signals are determined by means of the phase BEMF zero-crossing point. In reality, the input current variation depends on the inductance as well as input voltage, and it causes a torque ripple after all. Therefore, each control method considered in this research showed different torque ripple results. Based on the comparison, the causes of the torque ripple have been verified in detail.

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References

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