基于SVPWM的永磁同步电机直接转矩控制系统

Direct Torque Control of Permanent Magnet Synchronous Motor Based on Space Vector PWM

传统的直接转矩控制系统存在转矩脉动大、开关频率不固定等缺点,限制了直接转矩控制策略的工程应用,提出一种采用空间矢量调制(SVPWM)技术的永磁同步电机直接转矩控制实现方案。该方案以新型的转矩单闭环直接转矩控制系统结构为基础,采用SVPWM技术代替传统开关表方式,并对转矩调节器进行了改进设计。最后,通过实验验证了理论分析的正确性和系统实现的可行性。

Aiming at the problems of large torque ripple and unfixed switching frequency in the conventionaldirect torque control,which limits the application of engineering,a kind of permanent magnet synchronous motordirect torque control scheme based on SVPWM technique was proposed. Taking the new structure of the single torqueloop of DTC system as a basis,used SVPWM instead of the traditional switch table method,and also improved thetorque regulator. The validity of the theory analysis and the feasibility of the system are verified by the experiments.