Analysis of a Novel Fluz-Weakening Structure of High-Speed Permanent-Magnet Motors Based on Soft-Magnetic Ferrite
Soft-magnetic ferrite has advantages of high initial magnetic permeability, high electric resistivity, low loss and low cost in the high-frequency alternating field. Considering the characters of soft-magnetic ferrite, this paper uses a soft-magnetic ferrite ring as stator core and presents a novel field-weakening structure of high speed PM motors. Based on this structure, a novel field-weakening method of PM motors can be presented. The equivalent reluctance of permanent magnetic field circuit can be changed by altering saturation degree of soft-magnetic ferrite core in this method. For the convenience of analysis and calculation, considering the magnetic field distribution in the motors, this paper deduces an equivalent two-dimensional finite element model of three-dimensional magnetic field, by which the field-weakening parameters of high speed PM motor can be conveniently analyzed. The simulation results of finite element model prove: the field-weakening structure of high speed PM motor based on soft-magnetic ferrite, presented in this paper, is valid and feasible, offers a valid and applicative method for field-weakening control of high speed PM motor.
soft-magnetic ferrite permanent magnet motors field-weakening high speed motors
WANG Xing-hua FANG Xue GUO Ying-jie WANG Xiu-he
Electrical Engineering, Shandong University, Jinan 250061, China
国际会议
北京
英文
456-461
2006-08-29（万方平台首次上网日期，不代表论文的发表时间）