Evaluation of three cooling concepts for an electric vehicle motor - Lumped parameter models
Paper i proceeding, 2020

Three different cooling solutions for the same permanent magnet electric vehicle traction machine are compared using 2D finite element method generated loss maps and a thermal lumped parameter network. Two water jackets, with a wave and a spiral shaped channel, are compared to an end-shield cooling channel with end winding potting. The coolant convection is estimated using 3D conjugate heat transfer simulation software, presented in an accompanying paper. The continuous and overload torque capability are determined as well as the winding temperatures and energy losses during a set of low, middle and high-speed drive cycles. The results indicate very similar performance for the two water jackets. With the end-shield cooling the continuous torque is considerably higher at low speed levels, higher torque levels can be sustained for a certain time, and the drive cycle winding temperatures and losses are lower compared to the cooling jackets.

Electric vehicles

Lumped parameter network

Traction motors

Performance evaluation

Automotive application

Permanent magnet machines

Thermal analysis



Emma Grunditz

Chalmers, Elektroteknik, Elkraftteknik

Sonja Lundmark

Chalmers, Elektroteknik, Elkraftteknik

Mikael C D Alatalo

Chalmers, Elektroteknik, Elkraftteknik

Proceedings - 2020 International Conference on Electrical Machines, ICEM 2020

Vol. 23 August 2020 860-866 9271015
9781728199450 (ISBN)

2020 International Conference on Electrical Machines, ICEM 2020
Virtual Gothenburg, Sweden,




Annan elektroteknik och elektronik



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