Design And Research Of High Power Density Disc PMSM

Because of the high torque density and good dynamic response, Disc permanent magnet motor has been promoted and applied rapidly in the driving, servo and control areas. This paper studies the design of disc permanent magnet synchronous motor. The major works are in the follows.Firstly, by a comparative study of the torque density of disc and radial permanent magnet motor from sizing equation, the relationship of two motors' torque density has been analyzed. The main parameters formula of the six-phase disc permanent magnet synchronous motor is also put forward, such as armature reactance and slot leak reactance. The corresponding finite element method of these parameters also been introduced, the two results are basically the same. Based on research of the leakage coefficient of the structure with little-pole and much-tooth, the finite element calculation of leakage coefficient is presented.Secondly, with the six-phase motor with 22 poles and 24 slots presenting, the motor size is decreased and produce technology is reduced. On the basis of optimization of the shape of permanent magnet by the use of Fourier analysis and finite element method, it can make permanent magnet motor gap magnetic distortion and torque ripple reduced. The influence of the performance of the back-EMF wave and cogging torque in the different width of slot openings is quantitatively analyzed.Based on the research of the magnetic field distribution characteristics of disc permanent magnet motors, electromagnetic design process of disc permanent magnet motors with the diving ring way is compiled. By comparing with the prototype design value and measure results, electromagnetic procedures of disc permanent magnet motor has been improved and amended. A practical and reliable CAD software has been established now.Through stiffness calculation of rotor plate of DPMSM and natural frequency of stator and rotor, which ensured the reliable operation. Finally, based on above studies a prototype of DPMSM with a one-rotor-two-stators configuration and rated power 5kW has been designed the tests have been finished. Experimental Measure results and theoretical analysis are basic agreement。...