大功率牵引交流感应电动机的混合控制方法

Hybrid Control Method of High Power Drive AC Induction Motor

在低速区采用圆形磁链轨迹的间接定子量控制,通过计算定子磁链的周期变化量来获得定子电压矢量信息,从感应电动机的数学模型入手,建立交流感应电动机的磁链观测器模型,利用电磁转矩脉动理论分析间接定子量控制适宜于低速范围;在高速区采用十八边形磁链轨迹的转矩控制方法,以实现交流感应电动机全速域控制。试验结果验证了该方式的有效性。

In the low speed range, indirect stator-quantities control of circular stator flux linkage was adopted and the stator voltage vector was obtained by calculating the periodic variation of stator flux. Flux observer model was established according to mathematical model of induction motor. Electromagnetic torque ripple theory analysis showed that the indirect stator-quantities control was applicable to the low speed range. In high speed range, the torque control of eighteen-corner stator flux linkage was adopted to realize all speed control of AC induction motor. The experimental results verified the effectiveness of the method.