Study On Digital Control Technique Of Doubly Salient Electro-Magnetic Motor System

Doubly Salient Electro-Magnetic Motor is a relatively new type of AC brushless machine, which offers an excellent balance between cost, reliability, power density, and high-speed capability. The use of Digital Signal Processor (DSP) controller simplifies the control system, and makes it possible to implement optimized control algorithms.First, this thesis introduces the basic structure, static characteristic, operation principle of Doubly Salient Electro-Magnetic Motor and Generator. Then the thesis introduces the modeling of Doubly Salient Electro-Magnetic Motor and Generator using Pspice. Rotor position must be known to determine the working sequence of each phase and the time they works. Angle-control affects the direction of the motor. It also affects the current waveforms in windings and then affects the torque. This thesis analyzes the angle-control theory and proposes a way to find the optimized angle. Simulation is performed to verify the results.This thesis introduces the hardware and software design of the digital control system of Doubly Salient Electro-Magnetic Motor, which mainly discusses the speed and current loops and angle optimization control. The design of a digital voltage regulator with Built-in-Test function using Doubly Salient Electro-Magnetic Generator is also introduced.Prototypes of Doubly Salient Electro-Magnetic Motor and Generator control system is set up. The experiment results are obtained on the prototypes, which prove that the theories and analysis are correct.