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http://dx.doi.org/10.7467/KSAE.2014.22.5.029

Thermal Characteristics of Oil-cooled In-wheel Motor in Electric Vehicles  

Lim, Dong Hyun (Green Car Power System R&D Division, Korea Automotive Technology Institute)
Kim, Sung Chul (Green Car Power System R&D Division, Korea Automotive Technology Institute)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.22, no.5, 2014 , pp. 29-34 More about this Journal
Abstract
Cooling the in-wheel motor in electric vehicles is critical to its performance and durability. In this study, thermal flow analysis was conducted by evaluating the thermal performance of two conventional cooling models for in-wheel motors under the continuous rating base speed condition. For conventional model #1, in which cooling oil was stagnant in the lower end of the motor, the maximum temperature of the coil was $221.7^{\circ}C$; for conventional model #2, in which cooling oil was circulated through the exit and entrance of the housing and jig, the maximum temperature of the coil was $155.4^{\circ}C$. Therefore, both models proved unsuitable for in-wheel motors since the motor control specifications limited the maximum temperature to $150^{\circ}C$.
Keywords
Electric vehicle; Heat dissipation; In-wheel motor; Thermal performance; Cooling oil;
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Times Cited By KSCI : 1  (Citation Analysis)
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