Back Electromotive Force Analysis of Outer-Rotor Hybrid Excitation Flux Switching Motor

Gadafi M. Romalan, Md Zarafi Ahmad, Siti Khalidah Rahimi, Kausalya Nadaraja

Abstract


Outer-rotor machine installed for in-wheel drive electric vehicles becomes trending nowadays. Previously, outerrotor hybrid excitation flux switching motor (OR-HEFSM) in wheel drive has been proposed to eliminate the transmission gear conventionally used in single drive electric vehicles. However, the back EMF of existing OR-HEFSM is not purely sinusoidal waveform due to harmonic content and high level of cogging torque. This kind of problem might be lead to create noise and tremor in the motor. In this paper, rotor pole skewing technique is adopted to improve back EMF waveform, harmonic content and cogging torque. The analyses carried out based on 2D FEA and 3D FEA using JMAG Designer Version 14.0. Besides, the flux linkage, flux distribution and output performances are also investigated. The results obtained show that the skewing method has improved the back-EMF waveform and reduce the cogging torque. The 3D FEA result indicates the peak to peak value of cogging torque has reduced by 91.42% with skewed rotor method. The torque and power performance of 3D-FEA has maximum values of 248.33Nm with 44.42% and 162.79kW with 33.42%, respectively in which higher when compared with 2D-FEA and skewing.

Keywords


Outer-Rotor; Hybrid Excitation Flux Switching Motor; Cogging Torque; Skewing;

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References


M. Z. Ahmad, E. Sulaiman, G. M. Romalan, M. Jenal and T. Kosaka, “Three-phase variable flux outer-rotor switched flux permanent magnet machine,” in 2016 XXII Int. Conf. on Electrical Machines (ICEM), pp. 2563-2569, 2016.

M. Z. Ahmad, E. Sulaiman, Z. A. Haron and T. Kosaka, “Design improvement of a new outer-rotor hybrid excitation flux switching motor for in-wheel drive EV,” in 2013 IEEE 7th Int. Power Engineering and Optimization Conf. (PEOCO), pp. 298-303, 2013.

M. M. A. Mazlan, E. Sulaiman, M. Z. Ahmad and S. M. N. S. Othman, “Design optimization of single-phase outer-rotor hybrid excitation flux switching motor for electric vehicles,” in 2014 IEEE Student Conf. on Research and Development, pp. 1-6, 2014.

M. Jenal, E. Sulaiman, M. Z. Ahmad, F. Khan and M. F. Omar, “A new alternate circumferential and radial flux (AlCiRaF) permanent magnet flux switching machine for lightweight EV,” 2016 XXII Int. Conf. Electrical Machines (ICEM), pp. 2399-2405, 2016.

G. M. Romalan, E. Sulaiman, M. Z. Ahmad, M. F. Omar and M. K. Hassan, “Structural and assembly design of outer-rotor hybrid excitation flux switching motor based on finite element analysis approach,” in 2015 IEEE Conf. on Energy Conversion (CENCON), pp. 305-309, 2015.

M. Z. Ahmad, Z. A. Haron, E. Sulaiman and T. Kosaka, “Design studies on 125-10p outer-rotor HEFSM for in-wheel drive EV applications,” in 2013 IEEE Conf. on Sustainable Utilization and Development in Engineering and Technology (CSUDET), pp. 46-51, 2013.

F. Khan, E. Sulaiman, M. F. Omar and M. Jenal, “Performance comparison of wound field flux switching machines,” in 2015 IEEE Conference on Energy Conversion (CENCON), pp. 310-314, 2015.

E. Sulaiman, T. Kosaka, N. Matsui and M. Z. Ahmad, “Design studies on high torque and high power density hybrid excitation flux switching synchronous motor for HEV applications,” in 2012 IEEE Int. Power Engineering and Optimization Conf., pp. 333-338, 2012.

M. M. A. Mazlan, E. Sulaiman and T. Kosaka, “Design study of single phase outer-rotor hybrid excitation flux switching motor for hybrid electric vehicles,” in 2014 IEEE 8th Int. Power Engineering and Optimization Conf. (PEOCO2014), pp. 138-143, 2014.

E. Sulaiman, N. S. M. Amin, Z. A. Husin, M. Z. Ahmad and T. Kosaka, “Design study and analysis of hybrid excitation flux switching motor with DC excitation in radial direction,” in 2013 IEEE 7th Int. Power Engineering and Optimization Conf. (PEOCO), pp. 40-45, 2013.


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ISSN: 2180-1843

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