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Transient thermal modeling and analysis of railway traction motors
(Dept. Electric Power and Energy Systems)ORCID iD: 0000-0002-6283-7661
2018 (English)In: IEEE transactions on industrial electronics (1982. Print), ISSN 0278-0046, E-ISSN 1557-9948Article in journal (Refereed) Accepted
Abstract [en]

This paper presents a practical approach to modeland analyze transient thermal effects in open air-cooled electrictraction motors. The developed thermal modeling method enablesaccurate estimation of temperature in critical parts of the motorincluding winding and bearing. Advantages of both numericaland analytical modelling methods are exploited with the aim ofrealizing accurate estimation of hot spot temperatures in tractionmotors while keeping the computation time within a reasonablerange. Computational fluid dynamics (CFD) simulations arecarried out to model the cooling fan’s performance and airflow distribution in the motor in order to provide heat transferboundary inputs to the developed combined finite element (FE)and lumped parameter (LP) thermal model. The combinationof the FE and LP models keeps the size of the model relativelysmall and enables running transient calculations reasonably fast.Also, the developed model provides the possibility to studythe influence of stator and rotor duct blockages on the motorthermal performance which is a common root of failure intraction applications during operation in dirty environments. Theproposed thermal model is verified using experimental results ona traction motor equipped with temperature sensors in motorcritical parts and a good agreement between estimated andmeasured temperatures is achieved. Finally, a calibrated fullyanalytical model using the abovementioned developed model isimplemented to further reduce simulation running time andcalculate motor temperature under normal running condition.

Place, publisher, year, edition, pages
2018.
Keyword [en]
Computational fluid dynamics (CFD), finite element (FE) modeling, induction machine, lumped parameter thermal model, railway application, traction motor.
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Electrical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-224218OAI: oai:DiVA.org:kth-224218DiVA, id: diva2:1190282
Funder
StandUp
Available from: 2018-03-14 Created: 2018-03-14 Last updated: 2018-03-14

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Zhang, HuiWallmark, Oskar
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  • harvard1
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  • modern-language-association-8th-edition
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