Nonlinear Modeling And Speed Governing Of The Hybrid Excitation Doubly Salient Motor

HEDSM combines the merits of both DSPM and EEDSM, overcomes their defects and becomes a new research focus in the field of doubly salient motor. Due to self-magnetic material properties of DSPM, it’s air-gap magnetic field is constant, it’s speed range is limited. EEDSM of the speed can be realized by adjusting excitation current, but excitation loss is larger. Now, the research on HEDSM is mainly focused on its fundamental theory and the research method at home and abroad, including the static characteristics, the steady-state performance and the stability analysis, etc. This article based on the theory of HEDSM study modeling and speed control of motors and other aspects.Firstly, the development history about doubly salient motor and the research situation on hybrid excitation motor are reviewed in this dissertation. The basic structure and the flux-adjusting principle are presented. Furthermore, the speed governing and operation principle are introduced.Secondly, This article based on the electrical theory construct the mathematical model, and using the ideal linear inductance model instead of nonlinear inductance. The speed regulation simulation model of HEDSM, main controller and field current controller are established with the help of Simulink and Simpowersystems toolbox of MATLAB software. The simulation model of HEDSM is prerequisite of studying increase magnetic speed and weak magnetic speed. With the simulation model, the process of HEDSM speed governing system is studied and the simulation result is analyzed. The results show that the motor has a speed performance, wide speed range, and good dynamic performance..