无PI/P调节器的异步电机间接转矩自控制算法

Indirect self control algorithm for induction motors without PI/P regulators

异步电机间接转矩自控制(ISC)中转矩比例积分(PI)调节器和磁链比例(P)调节器的存在降低了系统的可移植性。该文根据同步旋转坐标系下异步电机数学模型和磁链、转矩变化规律,提出了一种直接根据转矩和磁链误差计算磁链幅值增量、磁链相位暂态增量的新颖ISC算法。磁链相位的稳态增量可以根据转矩、转子磁链和电机转速得到。算法中对转矩误差信号进行了滑动平均数字滤波,实现了稳态时给定空间电压矢量的连续调节。该算法计算过程不涉及旋转变换,简单方便,而且不使用PI/P调节器,便于移植,同时保持了传统直接转矩控制动态响应迅速的优点。仿真和实验结果表明该算法具有良好的转矩和电流控制性能。

The torque PI regulator and flux P regulator make it difficult to implement the indirect self control （ISC） scheme in different systems. A novel ISC algorithm was developed to calculate the flux amplitude increment based on the flux error and the transient position angle increment based on the torque and flux errors in the synchronous frame. The steady position angle increment can be calculated from the torque, rotor flux, and motor speed. Errors in the torque are filtered to achieve a steady-state continuous voltage. Since the algorithm does not use a rotation transformation or PI/P regulators, it is quite simple and convenient. The algorithm has fast dynamic response, which is an advantage over traditional direct torque control （DTC）. Simulations and experimental results verify the good performance of the proposed control scheme.