A Field Distribution of Dynamic-Link Magnetic Circuit for Room-Temperature Magnetic Refrigeration

Author

Lu, D.W. ; Wu, H.B. ; Xu, X.N. ; Jin, X.

Author_Institution

Dept. of Phys., Nanjing Univ.

Volume

16

Issue

2

fYear

2006

fDate

6/1/2006 12:00:00 AM

Firstpage

1554

Lastpage

1557

Abstract

A prevalent room-temperature magnetic refrigerator of permanent magnets usually utilize the structure of stationary magnetic circuit. A new notional method of dynamic-link magnetic circuit (DLMC) is proposed in this paper. The DLMC is made up of a changeable magnetic circuit, and it may generate a time-varying magnetic field in a certain space when some parts of the DLMC move. A typical DLMC is introduced in the paper, and a numerical value calculation and an experiment measuring for the DLMC are presented then. The research result shows that such a DLMC may produce a large variation of magnetic field when it is used in a rotary magnetic refrigerator. Although the minimum field is not equal to zero strictly, but it is much smaller than the maximum field, and the time-varying magnetic fields may be used to magnetize and demagnetize the magnetic refrigerants

Keywords

magnetic circuits; magnetic cooling; magnetic fields; permanent magnets; refrigeration; refrigerators; demagnetization; dynamic-link magnetic circuit; magnetic refrigerants; magnetization; permanent magnets; room-temperature magnetic refrigeration; rotary magnetic refrigerator; stationary magnetic circuit; time-varying magnetic field; Cooling; Extraterrestrial measurements; Magnetic circuits; Magnetic devices; Magnetic field measurement; Magnetic materials; Permanent magnets; Refrigerants; Refrigeration; Superconducting magnets; Calculation; dynamic-link magnetic circuit; measuring; permanent magnet; room-temperature magnetic refrigerator;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2006.873327

Filename

1643152