异步电机V/F控制方法的死区补偿

异步电机V/F控制在低速运行的情况下会由于死区效应而产生扭矩的脉动,严重影响到电机的正常运行。使用电压矢量定向的方法对电流进行解耦,可以为判断电流换向的时机提供依据。与传统的直接判断电流方向的方法相比,通过电压矢量定向的方法能够更加准确地判断出电流的方向,在相同的情况下,电压矢量定向的死区补偿方法能够使电流波形更加圆滑,输出更大的转矩。

Dead zone compensation of V/F control for induction motor

Due to the effect of the dead zone, V/F control of induction motor in the low -speed operation will couse torque ripple and seriously affect the normal operation of the motor. By using the method of voltage vector orientation,the current decoupling can provide the basis for judging the timing of the current commutation. Compared with the traditional method of detecting the current directly, the method of voltage vector orientation may more correctly for judging the direction of current. In the same case the current waveform will be more smooth and the torque will be greater by using the dead zone compensation method of voltage vector oriented.