Study On Indirect Vector Control System Based On DSP

The indirect vector control system based on DSP are studied , simulated and system realized in the thesis.The vector control is one of the advanced theories, which is based on motor unification principle, energy conversion and vector coordinate transformation theory. By transforming the model of AC motor to DC motor, the stator current is decomposed into two DC parts which are orientated towards the rotator magnetic field and controlled respectively. Thus the magnetic flux and torque are decoupled. In which way, it controls the asynchronous motor in DC motor way.The vector control theory and indirect vector control theory are introduced in detail firstly in the thesis, and the indirect vector control system is designed. At the same time, the comparion between Sine PWM and current SPWM and Space Vector PWM is carried. The principle and method of realization of SVPWM is presented, The indirect vector control system is established and simulated in MATLAB. The simulation results show that the controll systems realize decoupling between magnetic flux and torque, and transient and stable performance of the control system is all right.The hardware circuit and software design of the indirect vcetor control system based on DSP are detailedly introduced finally. The flow chart of control system is also presented. The software of whole control system is writed in assemble language. The result of experiment shows the hardware circuit and software design is right, control system is reliable and can meet the requirements of the design.