Investigation of a thermal model for a Permanent Magnet assisted Synchronous Reluctance motor

The use of High Power Density (HPD) electric machines in applications such as Electric Vehicles amplifies the need for their optimal thermal design in conjunction with their electromagnetic design. Permanent Magnet Synchronous Reluctance Machines (PMaSynRMs) are specialized Interior Permanent Magnet Synchronous Machines where the magnet content in the flux barrier paths is reduced resulting in a relatively economical design. This paper provides the overview of a study of a thermal model for a Five Phase Permanent Magnet Synchronous Reluctance Machine with two flux barrier paths. The proposed thermal model is then verified with experimental results and FEA simulations. Once developed, its use for online temperature estimation or integrated with an optimization algorithm will be considered as future work.

[1]  Tomy Sebastian,et al.  Temperature effects on torque production and efficiency of PM motors using NdFeB magnets , 1993, Conference Record of the 1993 IEEE Industry Applications Conference Twenty-Eighth IAS Annual Meeting.

[2]  L. Vandevelde,et al.  Temperature dependency of the efficiency of Line Start Permanent Magnet Machines , 2012, 2012 XXth International Conference on Electrical Machines.

[3]  Gunnar Kylander,et al.  Thermal Modelling of Small Cage Induction Motors , 1995 .

[4]  Wilfried Hofmann,et al.  Analysis of the temperature dependence of losses in electrical machines , 2013, 2013 IEEE Energy Conversion Congress and Exposition.

[5]  Andrea Cavagnino,et al.  Evolution and Modern Approaches for Thermal Analysis of Electrical Machines , 2009, IEEE Transactions on Industrial Electronics.

[6]  P.J. Masson,et al.  High power density superconducting motor for all-electric aircraft propulsion , 2005, IEEE Transactions on Applied Superconductivity.

[7]  T.M. Jahns,et al.  Thermal analysis of multibarrier interior PM synchronous Machine using lumped parameter model , 2004, IEEE Transactions on Energy Conversion.

[8]  D. R. Turner,et al.  Lumped parameter thermal model for electrical machines of TEFC design , 1991 .

[9]  Oskar Wallmark,et al.  Thermal analysis of permanent-magnet synchronous reluctance machines , 2011, Proceedings of the 2011 14th European Conference on Power Electronics and Applications.

[10]  E.L. Brancato,et al.  Estimation of lifetime expectancies of motors , 1992, IEEE Electrical Insulation Magazine.

[11]  Shuang Zhao,et al.  Thermal Analysis of a PMaSRM Using Partial FEA and Lumped Parameter Modeling , 2012, IEEE Transactions on Energy Conversion.

[12]  Sai Sudheer Reddy Bonthu,et al.  Optimal design of five-phase permanent magnet assisted synchronous reluctance motor for low output torque ripple , 2014, 2014 IEEE Energy Conversion Congress and Exposition (ECCE).

[13]  Seungdeog Choi,et al.  Fault tolerant control of five-phase permanent magnet assisted synchronous reluctance motor based on dynamic current phase advance , 2015, 2015 IEEE Energy Conversion Congress and Exposition (ECCE).

[14]  Mohamad Mahmoudi.  Thermal modelling of the Synchronous Reluctance Machine , 2012 .