基于DSP的数字化SVPWM三相逆变器闭环系统

基于空间矢量脉宽调制技术SVPWM(SpaceVectorPulseWidthModulation)电流谐波少、转矩脉动小、噪声低等优点设计了一种高性能的SVPWM三相逆变器系统。该系统采用具有高效缓冲电路、适用于高开关频率的三相逆变器主电路,控制系统基于DSPTMS320LF2407A,具有高速数据采集和实时数据处理的特点。通过应用SVPWM算法、快速傅里叶变换FFT(FastFourierTransform)算法和数字比例积分微分PID(Proportional-Integral-Derivative)算法等数字处理技术,采用闭环控制,具有良好人机交互界面和通信功能。实验结果表明,该系统控制精度高、动稳态性能好。

DSP-based closed-loop control system of three-phase SVPWM inverter

Owing to less current harmonics,lower torque ripple and lower noise of SVPWM(Space Vector Pulse Width Modulation)technique,a three-phase SVPWM inverter system is designed with high performance.Its main circuit has efficient snubber,applicable to high on-off frequency,and its control system is based on DSP(Digital Signal Processor)TMS320LF 2407A,suitable for high speed data sampling and real-time data processing.Applying SVPWM algorithm,FFT(Fast Fourier Transform)algorithm,digital PID(Proportional-Integral-Derivative)algorithm,a closed-loop control system of digital three-phase SVPWM inverter is made,which has friendly man-machine interface and commu-nication function.Experiment results show that the system has higher control precision,better static and dynamic performance.