Performance Entitlement by Using Novel High Strength Electrical Steels and Copper Alloys for High-Speed Laminated Rotor Induction Machines

Fengyu Zhang, David Gerada, Zeyuan Xu, Yuling He, He Zhang, Wei Hua, Chris Gerada

Research output: Journal PublicationArticlepeer-review

Abstract

The laminated rotor Induction Machine (IM), with its simple construction and manufac-turing, robustness, ease of control and comparatively lower cost remains by far the most utilized electromechanical energy converter. At very high speeds, traditionally its use is considered to be limited to the previously established operational limits of 2.5 × 105 rpmkW, beyond which the surface Permanent Magnet (PM) Machine and the solid rotor Induction Machine become the machines available for consideration. The aforesaid limits are derived from the use of classic materials. This paper reviews the recent developments in electrical steels and copper alloys and translates these into the resulting performance entitlement and operational limits through a case study involving a marine application, for which an existing rare-earth PM machine is in use. It is concluded that with novel materials, laminated rotor induction machines can be operated up to 6 × 105 rpmkW, thus opening the use of the rare-earth free Induction Machine for a wider application range previously limited to PM machines.

Original languageEnglish
Article number210
JournalElectronics (Switzerland)
Volume11
Issue number2
DOIs
Publication statusPublished - 1 Jan 2022

Keywords

  • Copper alloys
  • High speed
  • High strength electrical steel
  • Induction machines
  • Operational limits

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Signal Processing
  • Hardware and Architecture
  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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