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

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

Abstract

The laminated rotor Induction Machine (IM), with its simple construction and manufacturing, 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 rpm√kW, 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 rpm√kW, thus opening the use of the rare-earth free Induction Machine for a wider application range previously limited to PM machines.

• Journal Article Type: Article
• Acceptance Date: Nov 8, 2021
• Online Publication Date: Jan 10, 2022
• Publication Date: Jan 1, 2022
• Deposit Date: Jan 12, 2022
• Publicly Available Date: Jan 12, 2022
• Journal: Electronics (Switzerland)
• Electronic ISSN: 2079-9292
• Publisher: MDPI AG
• Peer Reviewed: Peer Reviewed
• Volume: 11
• Issue: 2
• Pages: 210
• DOI: https://doi.org/10.3390/electronics11020210
• Keywords: Electrical and Electronic Engineering; Computer Networks and Communications; Hardware and Architecture; Signal Processing; Control and Systems Engineering
• Public URL: https://nottingham-repository.worktribe.com/output/7223330
• Publisher URL: https://www.mdpi.com/2079-9292/11/2/210