Helical retaining sleeve for eddy current loss reduction in high-speed SPM machine

A rotor retaining sleeve is mechanically necessary in the structure of high-speed SPM machines to prevent structural failure. However, the significant eddy current loss within metal sleeves leads to a reduction in electromagnetic efficiency and serious thermal and mechanical issues. Therefore, sever...

Full description

Saved in:
Bibliographic Details
Published in:Electrical engineering 2021-08, Vol.103 (4), p.2087-2092
Main Authors: Al-ani, Mahir, Barrans, Simon
Format: Article
Language:English
Subjects:
Current loss
Economics and Management
Eddy current testing
Eddy currents
Electrical Engineering
Electrical Machines and Networks
Energy Policy
Engineering
Finite element method
High speed
Loss reduction
Mechanical properties
Original Paper
Power Electronics
Rotors
Sleeves
Structural failure
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A rotor retaining sleeve is mechanically necessary in the structure of high-speed SPM machines to prevent structural failure. However, the significant eddy current loss within metal sleeves leads to a reduction in electromagnetic efficiency and serious thermal and mechanical issues. Therefore, several techniques and methods have been proposed and developed to reduce such losses. In this paper, a helical retaining sleeve is proposed to reduce losses by cutting the flow path of the eddy currents. Using FEA, a comparison is made of the electromagnetic and mechanical performance of the proposed sleeve against a conventional sleeve having the same material and dimensions. It is concluded that the eddy current loss reduces significantly when the helical sleeve is used, whereas the mechanical stress is broadly unchanged in the central region of the rotor with only a small increase around the ends when compared with the conventional sleeve.
ISSN:0948-7921
1432-0487
DOI:10.1007/s00202-021-01218-4