Design of dual-magnet memory machines

Author

Li, Fuhua ; Chau, K.T. ; Liu, Chunhua

Author_Institution

Dept. of Electr. & Electron. Eng., Univ. of Hong Kong, Hong Kong, China

fYear

2011

fDate

20-23 Aug. 2011

Firstpage

1

Lastpage

6

Abstract

The memory machine, which adopts the aluminum-nickel-cobalt (AlNiCo) as the permanent magnet (PM) material, has attracted a wide attention. In this paper, by incorporating two kinds of PM materials including the neodymium-iron-boron (NdFeB) and the AlNiCo, the dual-magnet memory machine is proposed, which has more distinguished merits than its single-magnet counterpart. Due to the high coercivity of the NdFeB, the overall power density is augmented notably. Also, the risk of accidental demagnetization is significantly reduced. Most importantly, the design on how to combine these two kinds of PMs is discussed in detail, with emphasis on their shape, thickness and relative position. Both simulation and experimentation are given to illustrate the validity of the proposed design.

Keywords

aluminium alloys; boron alloys; cobalt alloys; iron alloys; neodymium alloys; nickel alloys; permanent magnet machines; permanent magnets; AlNiCo; NdFeB; accidental demagnetization risk; dual-magnet memory machine; permanent magnet material; power density; Air gaps; Bridge circuits; Bridges; DC motors; Load modeling; Magnetic flux; Torque;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines and Systems (ICEMS), 2011 International Conference on

Conference_Location

Beijing

Print_ISBN

978-1-4577-1044-5

Type

conf

DOI

10.1109/ICEMS.2011.6073591

Filename

6073591