Design and Analysis of Magnet Proportioning for Dual-Memory Machines

Author

Fuhua Li ; Chau, K.T. ; Chunhua Liu ; Jiang, J.Z. ; Winson Yong Wang

Author_Institution

Univ. of Hong Kong, Hong Kong, China

Volume

22

Issue

3

fYear

2012

fDate

6/1/2012 12:00:00 AM

Firstpage

4905404

Lastpage

4905404

Abstract

The dual-memory machine utilizes two kinds of permanent magnets (PMs), namely the aluminum-nickel-cobalt (Al-Ni-Co) and neodymium-iron-boron (Nd-Fe-B) materials, to provide effective flux-mnemonic feature. Namely, the Al-Ni-Co PM can be forward or backward magnetized in such a way that it can coordinate with the Nd-Fe-B PM to online tune the air-gap flux density. Based on the proposed DC-excited memory machine structure, the magnet proportioning between the Al-Ni-Co PM and the Nd-Fe-B PM is analysed. Both simulation and experimentation are carried out to verify the validity of the proposed dual-memory machine design.

Keywords

aluminium alloys; boron alloys; brushless DC motors; cobalt alloys; iron alloys; neodymium alloys; nickel alloys; permanent magnet machines; superconducting magnets; AlNiCo; DC-excited memory machine structure; NdFeB; air-gap flux density; aluminum-nickel-cobalt material; dual-memory machines; flux-mnemonic feature; magnet proportioning; neodymium-iron-boron material; permanent magnets; Air gaps; Magnetic circuits; Magnetic flux; Magnetic hysteresis; Magnetization; Neodymium; Windings; Dual-memory; flux-mnemonic machine; magnet proportioning; memory machine; permanent magnet machine;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2011.2180494

Filename

6111198