Dsp-based Asynchronous Motor Svpwm Study

Electric drives are very important application in the economy, national defense science and technology. Lots of production mechanics need regulate speed for the need of running, producing, transporting and saving energy. Before the eighties of the twentieth century, many devices mostly use DC motor speed regulation system. But because of DC motor's complicated structure, manufacture consuming time, constant maintenance and so on, people try to replace the DC motor speed regulation with AC motor speed regulation .By the development of power electronics, PWM technology, computer control and AC motor control, AC speed regulation system is replacing AC speed regulation system by its many faults such as solidity, safety and so on.After introduce the main technologies of AC regulation speed, the paper deduces in details the voltage space vector pulse width modulation (SVPWM) technology and SVPWM's vector selection of constant ratio of voltage and frequency. Following the analysis of the ordinary SVPWM technology project, the paper presents a new space vector PWM with smaller torque purple running low frequency. The simulation proves the conclusion, after faults and defaults are analyzed in contrast of traditional SVPWM. The paper shows the simulation configuration model of voltage PWM inverter and motor and discusses the simulation steps and items with MATLAB/SIMULINK.The power hardware system is based on DSP TMS320F243 and intelligent power module (IPM), and the DSP software is programmed to realize the modulation. The voltage and current of motor side are measured in the experiment. Experience and reference are provided in applying the TMS320F243 in SVPWM variable frequency speed regulation.