负120°电压矢量参与调节的直接转矩控制系统

The System of DTC with Regulation of-120° Voltage Vectors

在直接转矩控制中以磁链偏差、转矩偏差以及磁链位置来合理的选择电压矢量 ,力求形成逼近圆形的多边形磁链 ,并且在转速给定突然变小时加入负 12 0°电压矢量 ,以帮助零电压矢量的调节 ,在电机转速要求为零且要有电磁转矩输出时该电压矢量显得尤为重要 ,这样的系统在matlab/simulink中得以实现 。

This paper describes how to select voltage vectors reasonably in the control system of direct torque,according to field link error,torque error and location of field link.The purpose is to develop a polygon field link of approximately circular shape.When given speed suddenly decreases, 120° voltage vectors are added to help regulation of zero voltage vectors,and the 120° voltage vector is very important when motor wants output of torque at zero speed.The system is simulated in the MATLAB/simulink and achieves good results.