Title :
Investigation of influence of permanent magnet shape on field-control parameters of variable flux memory motor with FEM
Author :
Liu, Hengchuan ; Lin, Heyun ; Fang, Shuhua ; Huang, Xueliang
Author_Institution :
Sch. of Electr. Eng., Southeast Univ., Nanjing
Abstract :
In this paper, the magnetic field distributions of a variable flux memory motor with different rotor permanent magnet (PM) shapes under no-load and d-axis demagnetization are analyzed by finite element method (FEM). A detailed description on the changes of bypass flux and zero flux density area in the rotor is given. The influence of PM shape on the field-control parameters of the motor, such as the maximum air gap flux per pole, the maximum demagnetizing ampere-turns and the flux density on the midline of PM are numerically investigated. It is found that the utilization of PM can be considerably improved by choosing a reasonable PM shape. When the PM shape coefficient is less than 0.6, the demagnetizing effects of PM can be guaranteed easily.
Keywords :
air gaps; demagnetisation; finite element analysis; machine control; magnetic flux; permanent magnet motors; shape memory effects; air gap flux; bypass flux; d-axis demagnetization; field-control parameters; finite element method; magnetic field distributions; permanent magnet shape; variable flux memory motor; zero flux density area; Demagnetization; Finite element methods; Magnetic analysis; Magnetic fields; Permanent magnet motors; Rotors; Shafts; Shape; Stators; Synchronous motors;
Conference_Titel :
Automation Congress, 2008. WAC 2008. World
Conference_Location :
Hawaii, HI
Print_ISBN :
978-1-889335-38-4
Electronic_ISBN :
978-1-889335-37-7
