中国电气工程学报（英文） ›› 2021, Vol. 7 ›› Issue (1): 118-127.doi: 10.23919/CJEE.2021.000011

• • 上一篇    

  

  • 收稿日期:2020-07-12 修回日期:2020-10-26 接受日期:2021-02-25 发布日期:2021-04-19

Optimal Rotor Poles and Structure for Design of Consequent Pole Permanent Magnet Flux Switching Machine

Wasiq Ullah*, Faisal Khan, Muhammad Umair   

  1. Department of Electrical and Computer Engineering, COMSATS University Islamabad (Abbottabad Campus), Abbottabad 22040, Pakistan
  • Received:2020-07-12 Revised:2020-10-26 Accepted:2021-02-25 Published:2021-04-19
  • Contact: * E-mail: wasiqullah014@gmail.com
  • About author:Wasiq Ullah is from Afghanistan and was born in District Peshawar, Khyber Pakhtunkhwa, Pakistan in 1995. He received his B.S. and M.S. degrees in electrical (power) engineering from COMSATS University Islamabad (Abbottabad Campus), Abbottabad, Pakistan in 2018 and 2020 respectively. He is currently pursuing his PhD degree in electrical (power) engineering from COMSATS University Islamabad (Abbottabad Campus), Abbottabad, Pakistan.From 2018, he has been research associate with electric machine design research group. His research interests include analytical modelling, design analysis and optimization of permanent magnet flux switching machines, linear flux switching machines, hybrid excited flux switching machines and novel consequent pole flux switching machines for high speed brushless AC applications.Faisal Khan was born in District Charsadda, Khyber Pakhtunkhwa, Pakistan in 1986. He received his B.S. degree in electronics engineering from COMSATS University Islamabad (Abbottabad Campus), Pakistan in 2009 and his M.S. degree in electrical engineering from COMSATS University Islamabad (Abbottabad Campus), Pakistan in 2012. He received his Ph.D. degree in electrical engineering from Universiti Tun Hussein Onn Malaysia, Malaysia in 2017.From 2010 to 2012, he was a lecturer at the University of Engineering & Technology, Abbottabad, Pakistan. Since 2017, he has been as assistant professor with the Electrical Engineering Department, COMSATS University Islamabad (Abbottabad Campus), Pakistan. He is the author of more than 70 publications, one patent, and has received multiple research awards. His research interests include design and analysis of flux-switching machines, synchronous machines, and DC machines.Muhammad Umair was born in District Peshawar, Khyber Pakhtunkhwa, Pakistan in 1995. He received his B.S. degrees in electrical (power) engineering from COMSATS University Islamabad (Abbottabad Campus), Abbottabad, Pakistan in 2018. He is currently pursuing his M.S degree in electrical (power) engineering at COMSATS University Islamabad (Abbottabad Campus). His research interests include the design, analysis, optimization and experimental validation of flux-switching machines.

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关键词: AC Machine, consequent pole, flux bridge, flux switching machine, permanent magnet, rotor pole number, rotor structure, stress analysis

Abstract: Permanent magnet flux switching machines (PMFSM) have attracted significant research interest and are considered as competent candidates when higher torque density is primary requirement. However, conventional PMFSMs uses excessive rare earth PM volumes which ultimately increases machine the machine weight and PM cost. Moreover, the PMs extended at the stator yoke results in stator leakage flux which degrades the performance. To suppress the leakage flux and diminish the PM volume, the consequent pole PMFSM (CPPMFSM) with flux bridges and barriers encompassing partitioned circumferential and radial magnetized PMs is proposed, thereby ensuring an alternate magnetic path for the working harmonics which improves the modulation effect and flux distribution. Moreover, the influence of the rotor pole number on seven different rotor structures namely, curved rotor, trapezoidal rotor, wide rotor tooth tip, wide rotor base width, rectangular segmented and eccentric rotors are investigated based on the electromagnetic performance and stress distribution. Finite element analysis (FEA) reveals that the 12S-13P CPPMFSM with a wider rotor base offers comparatively better electromagnetic performance. Compare to the conventional PMFSM, the proposed CPPMFSM reduces the PM volume which minimizes the overall machine cost and weight, suppresses the torque ripples by 16.49%, diminishes total harmonic distortion (THD) by 35.24% and decreases cogging torque by 32.88%. Furthermore, the torque and power density are enhanced by 7.028% and 7.025% respectively.

Key words: AC Machine, consequent pole, flux bridge, flux switching machine, permanent magnet, rotor pole number, rotor structure, stress analysis