Title :
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
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);
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2013.2280847
