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Abstract

An analysis of the influence of inverter PWM speed control methods on the operation of a brushless DC (BLDC) motor was carried out. Field-circuit models of the BLDC motor were developed taking into account rotational speed control by two classic methods: the unipolar H_ON_L_PWM and the bipolar H_PWM_L_PWM. Waveforms of the electrical and mechanical quantities and the motor parameters were computed. The results of the computations were verified by measurements performed on a specially designed test stand. On the basis of the measuredwaveforms of the electrical and mechanical quantities the dependence of the drive system efficiencies and power losses on rotational speed was determined for the two methods of inverter control.

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Authors and Affiliations

Marek Paweł Ciurys
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Abstract

This paper takes a 50 kW interior permanent magnet brushless DC motor as an example, and explores the influence of the degree of stator slot skew on the overall motor magnetic density and air gap magnetic density; then reveals the influences of stator slot skewed structure on a series of key electromagnetic properties like no-load back electromotive force (B-EMF), cogging torque, electromagnetic torque, torque fluctuation, electromagnetic loss, input power, output power and operating efficiency. On this basis, a relatively best range of the skew degrees is obtained. The research work in this paper has direct reference value for the further improvement of design and manufacture, operation and maintenance, control and protection of such motors.
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Bibliography

[1] Zhang Chen, Principle and Application of Brushless DC Motor, China Machinery Industry Press, Beijing (1996).
[2] Tang Renyuan, Modern Permanent Magnet Motor Theory and Design, Mechanical Industry Press, Beijing (2005).
[3] LiWeiqi, LinRongwen, Tao Tao, Optimized design based on the air gap length of the built-in permanent magnet brushless DC motor, Electric Switchgear, vol. 58, no. 05, pp. 58–63 (2020).
[4] Parsa L., Hao L., Interior Permanent Magnet Motors with Reduced Torque Pulsation, IEEE Transactions on Industrial Electronics, vol. 55, no. 2, pp. 602–609 (2008), DOI: 10.1109/TIE.2007.911953.
[5] Ren Dejiang, Huang Qu, Li Jianjun, Wu Ning, Cogging torque optimization analysis of built-in permanent magnet synchronous motor, Explosion-Proof Electric Machine, vol. 54, no. 4, pp. 4–7+43 (2019).
[6] Zhao W., Lipo T.A., Kwon B., Torque Pulsation Minimization in Spoke-type Interior Permanent Magnet Motors with Skewing and Sinusoidal Permanent Magnet Configurations, IEEE Transactions on Magnetics, vol. 51, no. 11, pp. 1–4 (2015), DOI: 10.1109/TMAG.2015.2442977.
[7] AimengW., Heming L.,Weifu L., Haisen Z., Influence of skewed and segmented magnet rotor on IPM machine performance and ripple torque for electric traction, IEEE International Electric Machines and Drives Conference, pp. 305–310 (2009), DOI: 10.1109/IEMDC.2009.5075222.
[8] Adrian Młot, Marcin Kowol, Janusz Kołodziej, Andrzej Lechowicz, Piotr Skrobotowicz, Analysis of IPM motor parameters in an 80-kW traction motor, Archives of Electrical Engineering, vol. 69, no. 2 (2020), DOI: 10.24425/aee.2020.133038.
[9] Yang Zhihao, Yang Mengxue, Wang Sinuo, Bao Xiaohua, The influence of stator skew on the performance of permanent magnet synchronous motors, Transactions of the Chinese Society of Electrical Engineering, vol. 14, no. 3, pp. 97–102 (2019).
[10] Wang Dongliang, Chen Wei, Discussion on the electromagnetic design of concentrated winding permanent magnet motor from the perspective of torque fluctuation, Electric Tool, vol. 4, pp. 15–17 (2017), DOI: 10.16629/j.cnki.1674-2796.2017.04.004.
[11] Xiaodong S., Zhou S., Long C., Zebin Y., Skew Angle Optimization Analysis of a Permanent Magnet Synchronous Motor for EVs, IEEE International Conference on Applied Superconductivity and Electromagnetic Devices (ASEMD), pp. 1–2 (2018), DOI: 10.1109/ASEMD.2018.8558826.
[12] Wang Changcheng, Guo Hui, Sun Pei, Liu Ningning,Wang Yansong, Qin Yifei, A method for reducing cogging torque of permanent magnet synchronous motors, Light Industry Machinery, vol. 36, no. 6, pp. 62–66 (2018).
[13] He Qiang, Magnetic field analysis and cogging torque study of brushless DC permanent magnet motors, Hefei University of Technology (2016).
[14] Hongwei Fang, Hongxu Chen, Analysis and reduction of the cogging torque of flux-modulated generator for wave energy conversion, Energy Procedia, vol. 158, pp. 327–332 (2019), DOI: 10.1016/j.egypro.2019.01.097.
[15] Fu Lixin et al., GB/T 1029-2005 Three-phase synchronous motor test method, China Standard Press, Beijing (2006).
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Authors and Affiliations

Xue-gui Gan
1
ORCID: ORCID
Zhen-nan Fan
1
ORCID: ORCID
Jing-can Li
2
ORCID: ORCID

  1. The Key Laboratory of Fluid and Power Machinery, Ministry of Education, Xihua University, Chengdu, China
  2. State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing, China
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Abstract

This paper presents an algorithm and optimization procedure for the optimization of the outer rotor structure of the brushless DC (BLDC) motor. The optimization software was developed in the Delphi Tiburón development environment. The optimization procedure is based on the salp swarm algorithm. The effectiveness of the developed optimization procedurewas compared with genetic algorithm and particle swarmoptimization algorithm. The mathematical model of the device includes the electromagnetic field equations taking into account the non-linearity of the ferromagnetic material, equations of external supply circuits and equations of mechanical motion. The external penalty function was introduced into the optimization algorithm to take into account the non-linear constraint function.
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Authors and Affiliations

Łukasz Knypiński
1
ORCID: ORCID
Ramesh Devarapalli
2
ORCID: ORCID
Yvonnick Le Menach
3
ORCID: ORCID

  1. Poznan University of Technology, Poland
  2. Department of EEE, Lendi Institute of Engineering and Technology, Vizianagaram, India
  3. Lille University, France

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