无速度传感器调速系统控制策略

Control strategy of speed control system without speed sensor

为了使异步电机变得高效可控,以无速度传感器为背景,对无速度传感器调速进行探讨,提出了一种具有限定幅值补偿的新型定子磁链观测器,采用低通滤波器替代纯积分器,对低通滤波器造成的幅值衰减相位误差问题进行改善,解决了传统磁链观测器在低速时辨识精度低的问题;再建立了并联结构的模型参考自适应系统对电机转速进行估计,通过仿真验证理论分析的正确性和方法的可行性。

In order to make induction motor more efficient and controllable,speed sensorless speed regulation is discussed.A new stator flux observer with limited amplitude compensation is proposed.Low pass filter is used instead of pure integrator to improve the amplitude attenuation phase error caused by low-pass filter and solve the problem of traditional flux observer at low speed The correctness of the theoretical analysis and the feasibility of the method are verified by simulation.