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Vacuum Encapsulation of Traction Motor for Better Thermal Performance
Technical Paper
2017-26-0098
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Major decision driving constraints in the automobile sector is space and cost. With the advent of electric vehicles, these constraints apply for electric drive motor also. For applications involving neighborhood electric vehicles (NEV), the challenges become manifold with target cost of complete drivetrain system, including motor, controller & transmission, being very low. This and application of low cost axle mount drive systems prohibits usage of liquid cooled systems. In this scenario, ways to improve thermal performance of motor can be - to reduce heat generation, increase heat conduction and to increase heat rejection so that temperature of winding is kept under thermal limit of insulation used. Major area of thermal hotspots in the motor is at the end windings where direct conductive path to the housing is less. In this paper, thermal performance of the motor is improved by introducing vacuum encapsulation at the end winding thereby increasing net heat conduction. The encapsulation process affords better heat transfer from the coils to the frame, enhance winding rigidity, create total protection against moisture and prevent corrosion thereby improving the performance and life of the traction motors in applications such as electric vehicles. The process of impregnation & incorporation of silicon wedges is also eliminated. The analysis & validation of motors with different potting materials are done in bench level to compare its thermal performance.
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Citation
Ahamed, R., Vavilapalli, K., Jones, C., and Abhijith, V., "Vacuum Encapsulation of Traction Motor for Better Thermal Performance," SAE Technical Paper 2017-26-0098, 2017, https://doi.org/10.4271/2017-26-0098.Also In
References
- Dr. Werner Hollstein. Thermosetting resin systems for stator encapsulation in electro-mobility and industrial motors Huntsman Advanced Materials (Schweiz) Gmbh Basel
- Badran Omar , Sarhan Hussain , Alomour Bilal Thermal Performance Analysis of Induction Motor HTech Journals
- Boglietti A. and Cavagnino A. Analysis of the End winding Cooling Effects in TEFC Induction Motors IEEE Transactions on Industry Applications 43 5 1214 1222 0093-9994
- Staton David and Pickering. Stephen Recent Advancement in the Thermal Design of Electric Motors SMMA 2001 Fall Technical Conference 3-5 Oct, 2001