Evaluation of Performance of Flux Switching Motor in Segmented Rotor Using Permanent Magnet For Direct Drive


  • Enwelum I. Mbadiwe
  • Erwan B. Sulaiman






Direct Drive, Flux Switching Motor, High Torque, Permanent Magnet, Segmented Rotor


The torque action provided by combustion engine in conventional vehicles has been boosted by added electric motor, a device which also provide torque, for fuel economy in hybrid electric vehicle. Meanwhile, the complicated nature of combustion engine still poses economic imperatives as petroleum resources are getting depleted. Interestingly, vehicles propelled by electric motor powered by electricity, will completely eliminate combustion engine using fossil oil and also provide clean and reliable vehicles for personal transportation. Since electric motor is a core component, high torque motors are necessary for direct drive application. This papers presents a feasible 24 stator - 10 rotor segments flux switching motor (FSM) using 1 kg weight of PM. FSM is advance form of synchronous machine with double frequency that locates all active materials on the stator only. Permanent magnet (PM) flux source is chosen because it offers loss free excitation without external circuit connection. The JMAG® Studio tool version 14.1 was employed for 2D- FEA design and performance investigation of motor in terms of cogging torque and average torque.  Finally, simulation result of proposed motor successfully achieved 352Nm and constant power of 36kW projecting it as viable candidate for high torque necessary for direct drive application.


[1] Haimandan K & Ravikumar S, An approach to CO2 capture for mitigating global warming and climate change, An Overview Recent Advances in Space Technology and Climate Change, (2011), pp. 298-2804.

[2] Zhao F, Lee J, Choe Y & Kwon B, Efficiency optimal design of interior permanent for scooter, International Conference on Electrical Machine and System, IEEE, (2013), pp. 949-953.

[3] Eudy L & Zuboy, Overview of advanced technology transportation, International Renewable Energy Lab, US, (2004).

[4] Chan, CC, The state of the art of electric, hybrid, and fuel cell vehicles, Proceedings of the IEEE, (2007), pp. 704-718.

[5] Alexander M, Environmental assessment of full electric transportation portfolio, Greenhouse Gas Emission, Electric Power Research Institute, pp. 152, (2015)

[6] Zhu Q, Switched flux permanent magnet machines innovation continues, In Proceeding International Conference on Electrical machines and Systems, (2011), pp. 1-10.

[7] Jenal M, Erwan S, Kumar R, A new switched flux machine employing alternate circumferential and radial permanent magnet for light weight ev, Journal of Magnetics, Vol. 21, no 4, (2016), pp.537-543.

[8] Erwan S. Kosaka T & Matsui N, Design and analysis of high torque density and high power density hybrid dual excitation switched flux machine for traction drive in hevs, Renewal and Sustainable Energy, (2011), pp. 517-524.

[9] Erwan S. Kosaka T & Matsui N, Design and analysis of high torque density and high power density hybrid dual excitation switched flux machine for traction drive in hevs, Renewal and Sustainable Energy, (2011), pp. 517-524.

[10] Jenal M, Erwan S, Khan F & Haron ZA, A 2-D FEA based design study on salient rotor three-phase permanent magnet flux switching machine with concentrated winding, Applied Mechanics and Materials, Vol. 785, (2015), pp. 274-279.

[11] Kannan S, Novel rotor and stator swapped switched reluctance motor, IEEE International Conference on Power Electronics, Drives and Energy Systems, (2013).

[12] Thomas S, Zhu ZQ & Jewell GW, Comparison of flux switching and surface mounted permanent magnet generators for aerospace applications, In Proceeding, IET PEMD, (2010), pp. 1-5.

[13] Raminosoa T. Gerada C & Galea M, Design consideration for a fault tolerant flux switching permanent magnet machine, IEEE Transactions Industrial Electronics, (2011), pp. 2818-2825.

[14] Theodore W, Electrical Machines, Drives and Power Systems, Pearson Education Inc., New Jersey, Sixth Edition, (2006), pp. 235-236-

[15] Bhattacharya SK, Electrical Machines, McGraw Hill Education (India) Private Limited, New Delhi, Fourth Edition, (2014), pp. 9-10.

[16] Hoang E, Lecrivain M & Gabsi M, A new structure of a switching flux synchronous polyphase machine with hybrid excitation, In Proc. 12th Euro Conference on Power Electronics and Application, (2007), pp. 1-8.

[17] Wu S, Song L & Cui S, Study on improving the performance of permanent magnet wheel motor for electric vehicle application, IEEE Transactions on Magnetics Applications, Vol. 43, (2007), pp. 438-442.

[18] Zulu A, Mecrow BC & Armstrong M, Permanent magnet flux switching motor employing a segmental rotor, IEEE Transactions on Industry Applications, Vol. 6, (2012), pp. 2259-2267.

[19] Chen XY, Deng ZQ, Wang XL & Li SX, New design of reluctance motor with segmental rotors, Proc. IET International Conference on Power Electronics and Drives, (2010).

[20] Erwan S, Khan F & Ahmad MZ, Investigation of field excitation switched flux motor with segmental rotor, IEEE Conference on Clean Energy and Technology (CEAT), (2013).

[21] Mecrow BC, Bedford TJ, Bennet JW & Celik T, The use of segmental rotors for 2-phase flux switching motor, 17th Proc. International Conference on Electrical Machines, paper 608, (2006).

[22] Ahmad MZ, Erwan S, Haron ZA & Kosaka T, Preliminary studies on a new outer rotor permanent magnet flux switching machine with hybrid excitation for direct drive, In Proc. IEEE International Conference on Power and Energy, (2012), pp. 928-933.

[23] Mecrow BC, El-Kharashi, Finch JW & Jack AG, Segmental rotor switched reluctance motor with single tooth windings, In Electric Power Applications, IEEE Proc. Electrical Power Applications, Vol. 150, Issue 5, (2003), pp. 591-599.

[24] Omar MF, Erwan S, Khan F, Romala GM & Husin ZA, Comparison between single phase and three-phase fefsm with non- overlap windings and salient rotor, ARPN Journal of Engineering and Applied Sciences, (2013).

[25] Dorrell DG, Andrew MK, Mircea P, Lyndon Evans & David AS, Comparison of different motor design drives for hybrid electric vehicles, Energy Conversion Congress and Exposition (ECCE) IEEE, (2010), pp. 3352-3359.

[26] Fei W, Patrick CKL,Bing X & Demin W, Design improvement of outer rotor permanent magnet flux switching machine for direct drive urban electric vehicle propulsion, 39th Annual Conf. of the IEEE, Industrial Electronics Society (IECON), (2013), pp. 7319-7324.

[27] Laba A & Kar N, Outer rotor switched reluctance motor design for in-wheel drive electric bus applications, In Proceeding of the 20th International Conference on Electrical Machines, (2012), pp. 418-423.

[28] Raminosoa T, Hamiti M, Gelea M & Gerada C, Feasibility and electromagnetic design of direct-drive wheel actuator for green taxiing, Energy Conversion Congress and Exposition (ECCE), (2011), pp. 298-2804.

[29] Ahmad MZ, Haron ZA, Erwan S & Kosaka T, Design studies on 12s-10p outer-rotor hefsm for in-wheel drive ev applications, IEEE Conference on Sustainable Utilization and Development in Engineering and Technology, (2013).

[30] Rauch SE & Johnson LJ, Design principles of flux switch alternators, AIEE, Vol. 74, pt. III, (1955), pp. 1261-1268.

[31] Fei W, Shen J, Wang C & Luk PCK, Design and analysis of a new outer rotor permanent magnet flux switching machine for electric vehicle propulsion, International Journal for Computation and Mathematics in Electrical and Electronics Engineering, Vol. 30, (2011).

[32] Galea M, Gerada C & Hamiti T, Design considerations for an outer rotor field wound, flux switching machine, 20th Inter. Conf. on Electrical Machines (ICEM), (2012).

[33] Enwelum IM & Erwan S, Flux switching permanent magnet motor using segmented outer rotor structure for electric scooter, Indonesian Journal of Electrical Engineering and Computer Science (IJEECS), Vol. 6, (2017), pp. 379-386.

[34] Liang X & Luy Y, Harmonics analysis in induction motors, Conference on Electrical and Computer Engineering, (2006).

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