A Comparative study on the performance of SSDR coreless AFPM generators with conventional and Halbach magnet arrays

  • Asiful Habib Mr.
  • Dr. Che Hang Seng
  • Dr. Erwan bin Sulaiman
  • Dr. Mahdi


An axial flux permanent magnet (AFPM) generator is known to be a good candidate for both low and high-speed applications. In this paper, a comprehensive comparison of four coreless AFPM generators are presented with conventional and Halbach magnet arrangement combined with Iron and ironless rotor (epoxy). With the same coreless stator structure, four different AFPM generators with different rotor magnet arrangement and materials are compared in terms of voltage, current, power, machine weight and power density. The analytical design approach is first presented and is subsequently validated using ANSYS Maxwell electromagnetic finite element analysis (FEA) software. It is found that even though coreless AFPM machine with conventional magnet and iron rotor gives the overall best performance, fully coreless topology using Halbach array with epoxy rotor has comparable power density and can be desirable in low scale power applications

Author Biographies

Dr. Che Hang Seng

Dr. Che Hang Seng, received his BEng degree in Electrical Engineering from the University of Malaya, Malaysia, in 2009. He then obtained his PhD degree in 2013 under auspices of a dual PhD programme between the University of Malaya and Liverpool John Moores University, Liverpool, UK. He currently serves as a senior lecturer in Power Energy Dedicated Advanced Center (UMPEDAC), University of Malaya, Malaysia. He is a frequent reviewer for various technical journals, and is currently serving as an associate editor of IET-Electrical Power Application (IET-EPA) journal. Dr. Che was the recipient of the 2009 Kuok Foundation Postgraduate Scholarship Award for his PhD study. In 2016, he received the Malaysia's Rising Star Award (by Ministry of Higher Education) under the Frontier Researcher category. His research interests include power electronic converters and drives, fault tolerant control and renewable energy generation.

Dr. Erwan bin Sulaiman


Associate Professor, Electrical department, UTHM

Dr. Mahdi

Dr. Mahdi was born in Isfahan, Iran.He received the B.Eng. degree in electricalengineering–power from Islamic Azad Univer-sity, Isfahan, Iran, in 2009, and the M.Eng. de-gree in electrical engineering–mechatronics andautomatic control from University TechnologyMalaysia, Skudai, Malaysia, in 2012. He is cur-rently working toward the Ph.D. degree in elec-trical engineering–motor drive at the Universityof Malaya, Kuala Lumpur, Malaysia.He has been a Researcher with UM PowerEnergy Dedicated Advanced Centre, University of Malaya, since 2013.His research interests include fault-tolerant control of machines anddrives as well as power electronics converters for electric vehicle applications

Electrical Engineering