Coupled Electro-Thermal Analysis of Permanent Magnet Synchronous Motor for Electric Vehicles

Tikadar, Amitav; Kumar, Nitish; Joshi, Yogendra; Kumar, Satish

doi:10.1109/itherm45881.2020.9190562

Title: Coupled Electro-Thermal Analysis of Permanent Magnet Synchronous Motor for Electric Vehicles

Journal Article · Wed Jul 01 00:00:00 EDT 2020 · I-THERM - Intersociety Conference on Thermal Phenomena in Electronic Systems

DOI:https://doi.org/10.1109/itherm45881.2020.9190562· OSTI ID:1843426

Tikadar, Amitav ^[1]; Kumar, Nitish ^[1]; Joshi, Yogendra ^[1]; Kumar, Satish ^[1]

Georgia Inst. of Technology, Atlanta, GA (United States)

Permanent magnet synchronous motors (PMSM) are extensively used in electric vehicles. However, high internal heat generation and inefficient heat dissipation often limit the operational reliability, and longevity of the PMSM. Therefore, proper quantification of heat generation in electric motor and advanced embedded motor cooling techniques remain topics of immense interest. In order to accurately predict electro-magnetic performance, i.e., efficiency, component-wise heat losses and the corresponding temperature distribution of a jacket cooled machine, this paper presents a two-way iteratively coupled electro-thermal modeling framework. Finite element based software Motor-CAD has been utilized for electro-magnetic performance calculation of BMW i3 PMSM. Finite volume based computational fluid dynamics/heat transfer (CFD/HT) software ANSYS® FLUENT® has been employed to simulate the temperature distribution of the PMSM, using the electro-magnetic losses as heat input. Computed heat losses, stator, winding, rotor, and magnet temperatures are utilized as coupling parameters between the electro-magnetic and thermal models. A conventional one-way coupling algorithm has also been developed and compared to the newly proposed two-way coupling algorithm. Numerical results confirm that at high current density, one-way coupling algorithm significantly over-predicts the motor temperature compared to the two-way algorithm. A comprehensive analysis has been carried out to characterize the influences of current density, speed, and forced convection heat transfer coefficient on the heat losses, overall efficiency, and maximum temperature of the PMSM. Lastly, an efficiency map has been interpreted from the coupled electro-magnetic simulation.

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Research Organization:: Georgia Institute of Technology, Atlanta, GA (United States)

Sponsoring Organization:: USDOE Advanced Research Projects Agency - Energy (ARPA-E)

Grant/Contract Number:: AR0001023

OSTI ID:: 1843426

Journal Information:: I-THERM - Intersociety Conference on Thermal Phenomena in Electronic Systems, Conference: 2020 19th IEEE Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems (ITherm), Orlando, FL (United States), 21-23 Jul 2020; ISSN 1087-9870

Publisher:: IEEECopyright Statement

Country of Publication:: United States

Language:: English

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permanent magnet synchronous motor (PMSM)
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