Heat transfer analysis of a traction machine with directly cooled laminated windings

Summary, in English

A directly enhanced cooled winding in an electrical traction machine has the potential to extend the operation range, which is in particular attractive for a traction application when operating near peak power for extended periods of time. This paper presents the heat transfer analysis of a modular machine segment with a laminated winding. The laminated winding has a great potential when it comes to production of the winding and the thermal management of the excessive power losses in the winding. The prototype is built and assessed based on experimental measurements and finite element analysis. The results indicate some practical challenges of integrating the combined heat exchanger and winding and controlling the coolant flow through the machine construction. The prototype machine shows a limited enhanced cooling capability mostly due to flow leakage while the results from the simulation models indicate the great potential of direct cooled windings.

• Author: Avo Reinap; Francisco J. Márquez-Fernández; Rasmus Andersson; Conny Högmark; Mats Alakula; Anders Göransson
• Department/s: Industrial Electrical Engineering and Automation
• Publishing year: 2014-12-12
• Language: English
• Publication/Series: 2014 4th International Electric Drives Production Conference, EDPC 2014 - Proceedings
• Links: http://dx.doi.org/10.1109/EDPC.2014.6984395
• Document type: Conference paper
• Publisher: IEEE - Institute of Electrical and Electronics Engineers Inc.
• Topic: Energy Engineering
• Keywords: Design of electrical machines; Direct air-cooled windings; Finite element analysis; Hybrid vehicle drives; Laminated windings; Slot fill factor
• Conference name: 2014 4th International Electric Drives Production Conference, EDPC 2014
• Conference date: 2014-09-30 - 2014-10-01
• Conference place: Nuremberg, Germany
• Status: Published
• ISBN/ISSN/Other: ISBN: 9781479950089