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Torque Ripple and Harmonic Density Current Study in Induction Motor: Two Rotor Slot Shapes

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The variation of the rotor slot geometry causes diminution of joule losses, noise and vibrations, which improves Induction Motor IM performance and efficiency. In this paper, we propose a comparative study of the two IM design structures by varying the slot shapes based on the Finite Element Method (FEM). This software is used to estimate the magnetic field density, the magnetic flux and the harmonic current densities Simulation results prove that the optimal form of rotor slots is the round shape since the gain in torque ripple peak to peak may reach 40% compared to rectangular one.
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Torque Ripple; Induction Motor; FEM; Electric Vehicle; Harmonic; Current Density

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J. Guzinski, H. Abu-Rub, Sensorless induction motor drive for electric vehicle application, International Journal of Engineering, Science and Technology Vol. 2, No. 10, 2010, pp. 20-34

M. A. Herwald, Control Design and analysis of an advanced induction motor electric vehicle drive, thesis 29 April 1999.

C. Shumei, D. Ying, S. Liwei, Rotor Slots Design of Induction Machine for Hybrid Electric Vehicle Drives, IEEE, Vehicle Power and Propulsion Conference, VPPC’06, 2006

B. Virlan, A. Simion, L. Livadaru, A. Muteanu, A. M. Mihai and S. Vlasceanu, External Rotor Shape Estimation of an induction motor by FEM Analysis octombrie-decembrie, Buletinul AGIR nr. 4/2011nr.

M. Afaque Iqbal, G. Singh, Review on Influence of Rotor Geometry on the Performance of Single-Phase Capacitor-Run Induction Motor, International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering , June 2014.

V. Fireteanu, T. Tudorache and O. A. Turcanu, Optimal Design of Rotor Slot Geometry of Squirrel-Cage Type Induction Motors Romania, 1 -4244-0743-5/07/2007 IEEE.

V. A. Galindo, X. M. Lopez-FDEZ, J. A. DiasPinto and P. Coimbra, Parametric study of rotor slot shape on a cage Induction Motor, ISEF01, 2002.

J. Guzinski, H. Abu-Rub, Calculation of Electromagnetic Fields in Electrical Machines using Finite Elements Method, International Journal of Engineering and Industries, volume 2, Number 1, March, 2011.

K. J. Hammadi, S. Hachem Farhan, M. Ibrahim Gamai, Analysis AND Monitoring Characteristic Performance OF Squirrel-Cage Induction Motor WITH Broken Bars, Journal of Engineering and Development, Vol. 17, No.3, August 2013, ISSN 1813- 7822

K. Yamazaki, A. Suzuki, M. Ohto and T. Takakura, Harmonic Loss and Torque Analysis of High Speed Induction Motors, 978-1-4577-0541 IEEE, 2011.

J. K. Kamoun, N. Ben Hadj, M. Chabchoub, R. Neji, and M. Ghariani, An Induction Motor FEM-Based Comparative Study: Analysis of Two Topologies, Eighth International Conference and Exhibition on Ecological Vehicles and Renewable Energies (EVER), March 2013.

D. A. González, J. A. Tapia, and A. L. Bettancourt, Design Consideration to Reduce Cogging Torque in Axial Flux Permanent-Magnet Machine, IEEE Trans. Magn., vol. 43, no. 8, pp. 3435–3440, Aug,2007.

L. Dosiek and P. Pillay, “Cogging Torque Reduction in Permanent Magnet Machines,” IEEE Trans. Ind. Appl., vol. 43, no. 6, pp. 1565–1571, Nov./Dec.2007.

S. Williamson, C. I. McClay, "Optimisation of the geometry of closed rotor slots for cage Induction Motors, Industry Applications Conference Thirtieth IAS Annual Meeting, IAS'95., IEEE, Volume: 1,1995.

H. Jia, M. Cheng, W. Hua, W. Zhao, and W. Li,“Torque Ripple Suppression in Flux-Switching PM Motor by Harmonic Current Injection Based on Voltage Space-Vector Modulation,” IEEE Trans. Magn., vol. 46, no. 6, pp. 1527–1530, Jun. 2010.

L. Zhu, S. Z. Jiang, Z. Q. Zhu and C. C. Chan,“Analytical Methods for Minimizing Cogging Torque in Permanent-Magnet Machines,” IEEE Trans. Magn., vol. 45, no. 4, pp. 2023–2031, Apr. 2009.

K. Lu, P. O. Rasmussen and E. Ritchie, An Analytical Equation for Cogging Torque Calculation in Permanent Magnet Motors,” 17th International Conference on Electrical Machines, Chania, Kreta,Grækenland, 2006.

A. Kiyoumarsi, Prediction of Torque Pulsations in Brushless Permanents-Magnet Motors Using Improved Analytical Technique, Journal of Electrical Engineering, vol. 61, no. 1,pp. 37–43,2010.

S. Rashidae and S. A. Gholamian,"Reduction of cogging Torque in IPM Motors by Using the Taguchiand Finite Eement Method,” International Journal of Computer Science & Engineering Survey, vol. 2, no.2, May 2011

C. Y. Hsiao, S. N. Yeh and J. C. Hwang, A Rapid Simulation Method for Cogging Torque Calculation of Permanent-Magnet Synchronous Machines, The 32nd symposium on electrical power engineering, Taiwan's new North City, 2-3 December 2011.

A. Kumar, S. Marwaha and A. Marwaha, “Comparison of methods of minimization of cogging torque in wind generators using FE analysis,” Journal Indian Institute of Science, vol. 86, pp. 355-362 Jul./Aug. 2006.

K. Yamazaki, Y. Haruishi, and T. Ara, Calculation of Negative Torque Caused by Slot Ripples of Induction Motors, IEEE Transactions on magnetics, VOL. 40, NO. 2, MARCH 2004.

M. Ghariani, R. Trigui, N. Masmoudi, L. Kamoune, A new model of the induction motor in dynamic regime with the variable parameters for the electric regime with the variable parameters for the electric vehicle, Seventh International Conference on Modeling and Simulation of Electric Hatch and Systems ELECTRIMAX, 18-21 August 2002 Montreal, Quebec, Canada.

A. Lee, Emulating the lateral dynamics of a range of vehicles using a four-wheel-steering vehicle, SAE paper No. 950304, International Congress and Exposition, Detroit, Michigan, USA, 1995.

Hachicha, M.R., Ghariani, M., Neji, R., Finite element observer for induction machine in electric vehicle power train, (2013) International Review of Electrical Engineering (IREE), 8 (6), pp. 1751-1758.

Aghasi, M., Faraji, V., Behnia, H., Khaburi, D.A., Banadaki, A.D., Predictive DTC-ISVM for Doubly-Fed Induction Machine system fed by Indirect Matrix Converter, (2012) International Review on Modelling and Simulations (IREMOS), 5 (2), pp. 854-864.


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