Design and Verification of In-slot Oil-Cooled Tooth Coil Winding PM Machine for Traction Application
Artikel i vetenskaplig tidskrift, 2021

Tooth coil windings, in particular when using a double layer structure, present opportunities for in-slot liquid cooling. Since the windings are not overlapping, access to the slot from the end section for coolant liquids is enabled. In this paper, a solution for in-slot and instator direct oil cooling for a tooth coil winding machine is presented. The coils are pre-wound on bobbins and inserted on the stator teeth. The novelty of the design consists in the integration of the cooling, using a thermally conductive epoxy resin to create the channels within the slot as well as the positioning of the stator yoke cooling channels. A 50 kW machine for an automotive traction application is designed, manufactured and tested. Conjugate heat transfer simulations are used in the design process in combination with finite element analysis for the loss mapping. The thermal model is verified with measurements at 6 l/min oil flow and 17.5 A/mm2 continuous and 35 A/mm2 30 s peak. The thermal model is then used to establish a continuous operating point of 25 A/mm2 .

Cooling

Modeling

Permanent magnet motors

Författare

Alessandro Acquaviva

Chalmers, Elektroteknik, Elkraftteknik

Stefan Skoog

Chalmers, Elektroteknik, Elkraftteknik

Torbjörn Thiringer

Chalmers, Elektroteknik, Elkraftteknik

IEEE Transactions on Industrial Electronics

0278-0046 (ISSN) 15579948 (eISSN)

Vol. 68 5 3719-3727 9059039

Multifysiksimulering av kylsystemet och dess komponenter i ett el/hybrid-fordon

Energimyndigheten (41376-1), 2016-03-01 -- 2019-12-31.

Styrkeområden

Transport

Energi

Ämneskategorier

Annan elektroteknik och elektronik

DOI

10.1109/TIE.2020.2985009

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Senast uppdaterat

2022-04-05