Electronic Science and Technology ›› 2022, Vol. 35 ›› Issue (3): 71-78.doi: 10.16180/j.cnki.issn1007-7820.2022.03.011

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Design Analysis and Modeling Simulation of Brushless DC Motor

Xuanfeng SHANGGUAN,Tingyu YANG,Jinsong WEI,Yongjian LIU   

  1. School of Electrical Engineering and Automation,Henan Polytechnic University,Jiaozuo 454000,China
  • Received:2020-11-10 Online:2022-03-15 Published:2022-04-02
  • Supported by:
    National Natural Science Foundation of China(U1361109);National Natural Science Foundation of China(51777060);Natural Science Foundation of Henan(162300310117)


Research on the structure design and driving mode of single-phase brushless DC motor is carried out in this study. The basic equation of the motor under ideal working conditions is derived, and the design scheme of the motor is determined according to the actual needs of the project and combined with the design principles of the brushless DC motor. A single phase brushless DC motor with rated power of 38 W and rated speed of 750 rpm is designed using the summarized design scheme. The effect of the gradient air gap on the starting performance and the torque of the gear groove is analyzed, and the optimal air gap length is determined. By comparing the advantages and disadvantages of unipolar winding and bipolar winding form, the winding form is determined, and the number of turns is determined by combining the traditional motor design formula. The rationality of the design scheme is verified by the finite element method. According to the dynamic mathematical model of the motor, the model of the motor system is established in the Simulink environment, and the curves of the motor speed and torque are obtained by simulation. The simulation results are consistent with the theoretical analysis, which verifies the rationality of the motor design scheme and the validity of the motor model.

Key words: single-phase brushless DC motors, Simulink, performance analysis, mathematical modelling, design of electrical motor, tapered air-gap, cogging torque, modeling and simulation, finite element analysis

CLC Number: 

  • TN02