Based On The Dsp's Asynchronous Motor Vector Control System Research And Design

A closed-loop vector-control system of AC motors is presented in the paper. By the use of the digital signal processor(DSP) TMS320LF2407 developed for motor control purpose, it can realize uncoupling of stator's current and the algorithm of SVPWM, then it achieves the speed closed-loop control of AC motors. The main contents and innovations of this paper are as follows:1. Analysis of the mathematics model of the field oriented vector-control system, design of the closed-loop PI controller of speed, torque and flux; Studies on the control principle and algorithm of SVPWM, and analysis of the two control methods of SVPWM.2. The algorithm of SVPWM that is adopted by the system implements motor speed -regulation by control of magnitude and phase of motor flux. It can generate less harmonics in the output current of power inverter and less losses of AC motor, reduce pulsant component in output torque and raise availability of DC supply voltage.3. By means of high-speed calculation and abundant function module of TMS320LF2407, the algorithm and the effect of SVPWM has been greatly optimized.4. Aim for the higher precision and reliability of rotor flux, the improved combinatorial model has been adopted.5. Design of the software and hardware of the control system, lots of experiments that have been performed prove the rationality and feasibility of the control system.