Reduction of Cogging Torque in AFPM Machine Using Elliptical-Trapezoidal-Shaped Permanent Magnet

Authors

  • S. Ali Department of Electrical and Computer Engineering, COMSATS University Islamabad, Islamabad, Pakistan
  • J. Ikram Department of Electrical and Computer Engineering, COMSATS University Islamabad, Islamabad, Pakistan
  • C. P. Devereux Research and Development Lab. Omnidex Group Limited, Guangzhou 510050, P.R. China
  • S. S. H. Bukhari School of Electrical and Electronics Engineering, Chung-Ang University, Seoul, South Korea , Department of Electrical Engineering, Sukkur IBA University, Sukkur, Sindh, Pakistan
  • S. A. Khan Department of Electrical and Computer Engineering, COMSATS University Islamabad, Islamabad, Pakistan
  • N. Khan Department of Electrical and Computer Engineering, COMSATS University Islamabad, Islamabad, Pakistan
  • J.-S. Ro School of Electrical and Electronics Engineering, Chung-Ang University, Seoul, South Korea , 5 Department of Intelligent Energy and Industry, Chung-Ang University, Seoul, South Korea

Keywords:

Axial flux machine, cogging torque, elliptical-trapezoidal magnet, FEA, slot-less, torque ripples

Abstract

The reduction in cogging torque enables smooth operation and an increase in the torque density of the machine. This research aims to minimize cogging torque in dual rotor single stator axial flux permanent magnet (AFPM) machine. Reduction in cogging torque makes the back EMF sinusoidal and reduces the torque ripples in AFPM machine. In this paper, an elliptical trapezoidal-shaped permanent magnet (PM) is proposed to minimize torque ripples of the AFPM machine. The 3D finite element analysis (FEA) is used for the analysis of AFPM machine. The optimization of AFPM machine is done by employing the asymmetric magnet-overhang along with the parameters of elliptical-shaped PM using Genetic algorithm (GA).

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Author Biographies

S. Ali, Department of Electrical and Computer Engineering, COMSATS University Islamabad, Islamabad, Pakistan

Salman Ali was born in Pakistan on 1st April 1992. Ali received his B.S. degree in Electrical Engineering from Federal Urdu University Islamabad in 2015 and the M.S. degree in Electrical Engineering from COMSATS University Islamabad in 2019. He was Research Associate in COMSATS University from 2017 to 2019. Currently, He is serving as Electro-Mechanical Development Engineer in R&D Department of Omnidex Group Limited since 2019. His research interests are design, analysis and prototyping different topologies of electrical machines. Until now, most of his research is in the design, analysis, and prototyping of axial flux permanent magnet machines.

J. Ikram, Department of Electrical and Computer Engineering, COMSATS University Islamabad, Islamabad, Pakistan

Junaid Ikram received his B.E. degree in Electrical Engineering from University of Engineering and Technology Lahore, Pakistan in 2005, M.S. degree from Hanyang University, South Korea in 2009 and he did his Ph.D. degree in Electrical Engineering from Comsats University Islamabad, Pakistan in 2017. Currently he is working as a Senior Engineer in COMSATS University Islamabad. His research interests include design, analysis and optimization of axial flux machines, vernier machines, wound rotor synchronous machine, hybrid flux switching machines and modeling of the machine losses.

C. P. Devereux, Research and Development Lab. Omnidex Group Limited, Guangzhou 510050, P.R. China

Christopher P. Devereux was born in England in 1947 but spent the next 4 years of his early life in Abbottabad, Pakistan. On returning to England Christopher Devereux progressed through an uneventful British schooling until 17 when he organized and led an expedition into the Amazonas of Brazil. This inspired him to start a lifetime of travel basing himself first in Central and South America, then back to the UK and then on to China where he started and now runs an engineering company. He follows in his grandfather’s footsteps (who filed over 200 engineering patents for the Indian railway system) in developing new engineering concepts and is the holder, himself, of several patents.

S. S. H. Bukhari, School of Electrical and Electronics Engineering, Chung-Ang University, Seoul, South Korea , Department of Electrical Engineering, Sukkur IBA University, Sukkur, Sindh, Pakistan

Syed Sabir Hussain Bukhari received his B.E degree in Electrical Engineering from Mehran University of Engineering and Technology Jamshoro, Pakistan, in 2009, and Ph.D. from the Department of Electronic Systems Engineering, Hanyang University, South Korea in 2017. He joined Sukkur IBA University as an Assistant Professor in December 2016. He is currently working as a Research Professor at Chung-Ang University, Seoul, South Korea under Korean Research Fellowship (KRF) program. His main research interests include electric machine design, power quality, and drive controls.

S. A. Khan, Department of Electrical and Computer Engineering, COMSATS University Islamabad, Islamabad, Pakistan

Shahid A. Khan received the B.S. degree in Electrical Engineering from the University of Engineering and Technology, Lahore, Pakistan, and the M.S. and Ph.D. degrees in Radio Communications from the Universality of Portsmouth, U.K. In 2003, he joined COMSATS University Islamabad (CUI) as an Assistant Professor and elevated to a professor within few years. He worked as the HOD, the Chairman, and the Dean of the Faculty of Engineering. He is currently the Founder of various engineering programs in different campuses of CIIT. He has established many teaching and research labs by securing funding of about ten million USD. He has authored over 80 research articles published in international journals and conferences. On the basis of his meritorious services, he has been honored with multiple awards and memberships in the field of engineering education.

N. Khan, Department of Electrical and Computer Engineering, COMSATS University Islamabad, Islamabad, Pakistan

Nasrullah Khan received the B.Sc. degree in Electrical Engineering degree from UET Lahore, in 1984, the M.Sc. degree from Reading University, U.K., in 1988, and the Ph.D. degree from Essex University, U.K., in 1992. He has 21 years teaching and research and 12 years practical field experience. He has done several research projects in COMSATS and abroad. He has 34 years local and foreign teaching, research, and field experience.

J.-S. Ro, School of Electrical and Electronics Engineering, Chung-Ang University, Seoul, South Korea , 5 Department of Intelligent Energy and Industry, Chung-Ang University, Seoul, South Korea

Jong-Suk Ro received the B.S. degree in Mechanical Engineering from the Han-Yang University, Seoul, South Korea, in 2001, and the Ph.D. degree in Electrical Engineering from Seoul National University (SNU), Seoul, South Korea, in 2008. He conducted research at the Research and Development Center of Samsung Electronics as a Senior Engineer, from 2008 to 2012. From 2012 to 2013, he was with the Brain Korea 21 Information Technology of SNU, as a Postdoctoral Fellow. He conducted research at the Electrical Energy Conversion System Research Division, Korea Electrical Engineering and Science Research Institute, as a Researcher, in 2013. From 2013 to 2016, he worked with the Brain Korea 21 Plus, SNU, as a BK Assistant Professor. In 2014, he was with the University of Bath, Bath, U.K. He is currently an Associate Professor with the School of Electrical and Electronics Engineering, Chung-Ang University, Seoul, South Korea. His research interests include the analysis and optimal design of next-generation electrical machines using smart materials such as electromagnet, piezoelectric, and magnetic shape memory alloy.

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Published

2021-10-21

How to Cite

[1]
S. . Ali, “Reduction of Cogging Torque in AFPM Machine Using Elliptical-Trapezoidal-Shaped Permanent Magnet”, ACES Journal, vol. 36, no. 08, pp. 1090–1098, Oct. 2021.

Issue

2021: Vol 36 Iss 8

Section

Articles