Recent advances in non-oriented electrical steel for EV/HEV traction motor

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Recent advances in non-oriented electrical steel for EV/HEV traction motor

Tanaka, Ichiro / Yashiki, Hiroyoshi

To improve efficiency of traction motors for environmentally friendly vehicles, we have developed two kinds of non-oriented electrical steels: low core loss and high magnetic induction grades for stator core and high-strength grades highly suitable for rotor core of IPM (interior permanent magnet) motors. Excellent magnetic properties of the developed steel for stator core were ascribed to recrystallization texture control by phosphorus addition. Phosphorus segregation at initial grain boundaries enhances beneficial recrystallization texture evolution. High-strength of the developed steel for rotor core of IPM motors was achieved by dislocation strengthening through niobium addition. Solute niobium moderately retards recrystallization kinetics; then the retardation leads to specific microstructure favorable for great strength. The newly developed electrical steels of notable characteristics will significantly contribute to an improvement in performance of traction motors for electric vehicles and hybrid electric vehicles, and furthermore, motors for appliances, particularly compressor motors for air conditioners.

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Title :

Recent advances in non-oriented electrical steel for EV/HEV traction motor

Additional title:

Neue Fortschritte bei der Entwicklung eines nicht kornorientierten elektrotechnischen Stahles für Fahrzeuge mit elektrischem Antrieb und mit Hybridantrieb

Contributors:

Tanaka, Ichiro (author) / Yashiki, Hiroyoshi (author)

Published in:

TMS, TMS Annual Meeting & Exhibition, 140 ; 339-346

Publication date :

2011

Size :

8 Seiten, 11 Bilder, 2 Tabellen, 11 Quellen

ISBN :

978-1-11802-945-9

DOI :

https://doi.org/10.1002/9781118062111.ch37