Assessment of cooling integration with direct cooled windings

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding

Abstract

This paper presents and assesses the cooling integration of medium size electrical machines with distributed hair-pin type of windings. By introducing a hollow or profiled conductor the generated heat can be removed right where it is created. The cooling duct in conductor that can be connected either to series or parallel cooling flows increases DC resistance up to 1.5 times when comparing commercially available small hollow conductors. Any added heating power is compensated by cooling and added pumping power that can bring the continuous operation to a new peak level though at lower efficiency. This article targets production oriented calculations and experiments for conjugate heat transfer analysis where the advantage of direct cooled hair-pin type of windings is compared to more conventional rectangular solid conductors. A machine design, which is suitable for traction application, is selected to investigate the power losses in the machine winding and experimental work on direct cooled test cells is used to support the thermal design and evaluate the benefits of the cooling integration.

Details

Authors
Organisations
External organisations
  • Lund University
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Electrical Engineering, Electronic Engineering, Information Engineering

Keywords

  • conjugate heat transfer, cooling integration, distributed windings, finite element method, hollow conductors
Original languageEnglish
Title of host publication2018 IEEE International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles and International Transportation Electrification Conference, ESARS-ITEC 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781538641927
Publication statusPublished - 2019 Jan 14
Publication categoryResearch
Peer-reviewedYes
Event2018 IEEE International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles and International Transportation Electrification Conference, ESARS-ITEC 2018 - Nottingham, United Kingdom
Duration: 2018 Nov 72018 Nov 9

Conference

Conference2018 IEEE International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles and International Transportation Electrification Conference, ESARS-ITEC 2018
CountryUnited Kingdom
CityNottingham
Period2018/11/072018/11/09