Abstract: For large power motors with fan or pump load, variable frequency speed regulation is an important means of energy saving. SVPWM (Space Vector Pulse Width Modulation) technology applied in variable frequency speed regulation system can not only improve the shortcoming of low voltage utilization in the PWM technology, but also have advantages of small torque ripple and low noise. In this paper, a SVPWM vector control AC asynchronous motor speed regulation system employing a core TMS320LF2407A-type DSP chip is presented. The basic principle of voltage space vector control is introduced, and the design of hardware and software in the system is analyzed. The obtained experimental results indicate that the speed regulation system has excellent dynamic and static performance and good control effect, so it has vast application prospect in high energy consuming devices such as fan and pump.

Key words: SVPWM, vector control, DSP, variable frequency speed regulation, asynchronous motor