摘  要：永磁同步电机（PMSM）直接转矩控制系统的关键之一是磁链的准确观测。结合一种适合PMSM直接转矩控制的正交反馈补偿定子磁链观测器。观测器从确保磁链和反电势正交的角度出发，保证了电机在宽运行范围定子磁链观测的准确性。实验结果表明，采用的观测器能在宽速度范围内精确地估算电机定子磁链，实现PMSM直接转矩控制系统的高性能控制。
关键词：正交补偿；磁链观测器；直接转矩控制；永磁同步电机；实验

Abstract: Flux observation is one of the key to keeping high performance of a direct-torque-controlled drive system.This paper proposed a nonlinear perpendicular flux observer with feedback compensation model,and combined with DTC for AC motor control.The flux observer can ensuring flux linkage to be perpendicular to back electromotive force,so that the stator flux linkage can be estimated accurately over a wide speed rang.The feasibility and correctness were verified by experiment results.
Key Words: Perpendicular compensation；Flux observer；Direct torque control；PMSM；Experiment