Study On BLDC Motor Control System Based On DSP

Brushless DC Motor has the advantages of simple structure,reliable operation and easy maintenance of AC Motor.At the same time,it has the advantages of high efficiency,no excitation loss and easily adjusting speed of DC Motor.It has been widely used in the industry control domain.Small and medium-sized power of the speed control system is gradually being replaced by the Brushless DC Motor speed control system.The thesis is based on this consideration,the research of the Brushless DC Motor speed control technology and methods has been done.The basic component parts,the basic running principle and the mathematical model of the Brushless DC Motor are expounded in the thesis.Then based on P-fuzzy self-adaptive PID control system is designed.In matlab/simulink window,the simulation model of the Brushless DC Motor speed control system is established.As opposed to the conventional PID controller,the system has a better static and dynamic performance,and has a strong adaptability in changes of the parameters and the load disturbance,and achieves good control effect.Based on detailed analysis of the theory of direct torque control,the scheme is designed about the BLDCM-DTC.The stator flux space vector and electromagnetic torque as variables is controlled,the purpose is to control the electromagnetic torque directly.Based on Matlab/Simulik software,the simulation model of brushless DC motor direct torque control system is established,and the study of simulation is implemented.Simulation results show that the scheme of DTC can inhibit the brushless DC motor torque ripple effectively.Last a DSP based control system is designed for experimental use,A solid foundation is made for the follow-up study of BLDCM-DTC.