基于转子磁链q轴分量的异步电机间接矢量控制转差频率校正

异步电机间接矢量控制系统在工业场合应用广泛，然而其性能易受转子电阻参数变化等因素影响。该文将定子电流矢量定向同步坐标系下的转子磁链观测器与间接矢量控制系统相结合，利用观测器得到的实际磁链计算转子磁场定向下转子磁链的q轴分量，并根据定向准确情况下转子磁链q轴分量为零的特点提出一种间接矢量控制转差频率校正方法，保证间接矢量控制系统对转子磁场的准确定向。详细介绍了该校正方法的基本原理和系统框图，并进行了稳定性分析。仿真和实验结果证明了该校正方法的有效性。

Slip Frequency Correction Method Base on Rotor Flux q Axis Component for Induction Machine Indirect Vector Control System

Induction machine with indirect vector control is very popular in industrial applications. However, it is sensitive to rotor resistance variation. A rotor flux observer in the stator current orientation synchronous reference frame is combined with an indirect vector control system, then the rotor flux q-axis component in rotor flux orientation reference frame yrq could be obtained with the observed rotor flux. When accurate rotor flux orientation is realized, yrq is zero, thus a slip frequency correction method is proposed to ensure accurate rotor flux orientation. Basic principles, schematic diagram and stability analysis are described. Simulation and experiment results confirm the validity of the proposed method.