Flux Weakening Mechanism of Interior Permanent Magnet Synchronous Machines With Segmented Permanent Magnets

Author

Shiying Duan ; Libing Zhou ; Jin Wang

Author_Institution

State Key Lab. of Adv. Electromagn. Eng. & Technol., Huazhong Univ. of Sci. & Technol., Wuhan, China

Volume

24

Issue

3

fYear

2014

fDate

Jun-14

Firstpage

1

Lastpage

5

Abstract

The flux weakening mechanism of interior permanent magnet synchronous machines with segmented permanent magnets (PMs) in the rotor is studied in this paper. Air gap flux density with and without segments are analyzed and compared, based on both analytical and finite element methods. Frozen permeability technique is used to separate the PM component flux density in iron bridges at load condition, to find out the influence of demagnetizing current on flux variation. Design parameters are optimized to improve the field weakening capability. A novel explanation is proposed to explain the improvement effect of the flux weakening capability by magnet segmentation.

Keywords

air gaps; demagnetisation; finite element analysis; iron; magnetic flux; magnetic permeability; permanent magnet machines; rotors; synchronous machines; Fe; PM component flux density; air gap flux density; demagnetizing current; finite element methods; flux variation; flux weakening mechanism; frozen permeability technique; interior permanent magnet synchronous machines; iron bridges; load condition; magnet segmentation; optimized design parameters; rotor; segmented permanent magnets; Bridge circuits; Bridges; Demagnetization; Iron; Permanent magnet motors; Permanent magnets; Rotors; Field weakening capability; frozen permeability technique; segmented interior permanent magnet synchronous machine (IPMSM);

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2013.2280847

Filename

6589117