The Development And Joint Simulation Analysis Of A Dynamic Reluctance Mesh Analysis Program For Permanent Magnet Synchronous Machine Based On MATLAB

The dynamic reluctance mesh (DRM) modeling analysis method for permanent magnet synchronous machine combines the features of the equipment magnetic circuit (EMC) method and the finite element method (FEM) which meets the requirements of the preliminary design and the design verification very well. Instead of the empirical equation and the assumed condition in EMC, DRM is based on the equipment reluctance network, which improves the calculation accuracy effectively. Meanwhile, the equivalent magnetic flux tube, as the elementary unit of DRM, largely reduces the number of mesh dissection, the total computing time and the computing resources need by FEM.This thesis studies a600kW permanent magnet synchronous machine (PMSM). A geometric method is introduced to facilitate the evaluation of the nonuniform airgap reluctance and a DRM model is built. A fast and effective DRM simulation program is developed based on MATLAB.The no-load characteristic of the PMSM is analyzed by the DRM simulation program. A comparative analysis shows that the step skew of rotor magnetic is effective to reduce the stator slot harmonic. A FEM simulation model is provided to verify the the DRM simulation program, and the comparison shows that the good accuracy and efficiency for the engineering purpose.The frozen permeability method is applied to the DRM simulation program. The relationship between the D-Q axis inductances parameters and the D-Q axis current is studied as the inductances changing with the saturation of iron core. As an extended study, the main characters under steady state are provided.An interface program is designed to joint the DRM program and the motor control system in MATLAB-Simulink. The maximum torque per ampere vector control strategy is proved to be better than the id=0control strategy due to the rapid speed response and high power factor. A dynamic parameter motor model derive from the DRM simulation results is applied into the control system instead of original model, and the results indicate the dynamic parameter model is in good match with the original one.