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Direct Coil Cooling of a High Performance Switched Reluctance Machine (SRM) for EV/HEV Applications

Liu, Zhengyu and Winter, Thomas and Schier, Michael (2015) Direct Coil Cooling of a High Performance Switched Reluctance Machine (SRM) for EV/HEV Applications. SAE World Congress and Exhibition 2015, 21.-23. Apr. 2015, Detroit, USA. DOI: 10.4271/2015-01-1209

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Abstract

This paper presents the development of a novel direct coil cooling approach which can enable high performance for electric traction motor, and in further significantly reduce motor losses. The proposed approach focuses on bypassing critical thermal resistances in motor by cooling coils directly in stator slots with oil flow. Firstly, the basic configuration and features are shown: sealed stator slots to air gap, pressure reservoirs on both side of the slots and slot channels for oil flow. The key to enhance thermal performance of the motor here is based on introducing fluid guiding structure in the slot channels. Next, heat transfer in the channel with guiding structure is investigated by CFD and compared with bare slot channel without guiding structure. For studying the effectiveness of proposed cooling concept, numerical analysis is conducted to compare it with HEV favored oil impingement cooling. Finally, thermal performance of the proposed cooling approach is verified and compared with water/glycol jacket cooling on a switched reluctance machine prototype for EV application inside a public funded project ODIN.

Item URL in elib:https://elib.dlr.de/101946/
Document Type:Conference or Workshop Item (Speech)
Title:Direct Coil Cooling of a High Performance Switched Reluctance Machine (SRM) for EV/HEV Applications
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Liu, Zhengyuzhengyu.liu (at) de.bosch.comUNSPECIFIED
Winter, Thomasthomas.winter (at) de.bosch.comUNSPECIFIED
Schier, Michaelmichael.schier (at) dlr.deUNSPECIFIED
Date:2015
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.4271/2015-01-1209
Status:Published
Keywords:Switches Reluctance Motor, Electric Machine, Thermal Management, Direct Coil Cooling
Event Title:SAE World Congress and Exhibition 2015
Event Location:Detroit, USA
Event Type:international Conference
Event Dates:21.-23. Apr. 2015
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Terrestrial Vehicles (old)
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - Fahrzeugenergiesystem III (old)
Location: Stuttgart
Institutes and Institutions:Institute of Vehicle Concepts > Fahrzeug-Energiekonzepte
Deposited By: Schier, Michael
Deposited On:25 Jan 2016 15:12
Last Modified:25 Jan 2016 15:12

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