无速度传感器矢量控制系统转速辨识的复合算法

Complex Speed Identify Arithmetic Research on Speed-Sensorless Vector Control System

针对电机开环速度估计和磁化电流无功功率模型参考自适应法的优缺点,提出了一种将二者结合起来的转速辨识复合算法。该方法提高了转速辨识的动态性能和稳态辨识精度,并解决了磁化电流无功功率模型在转速过零点的失控问题。通过仿真及试验证明了该方法的正确性。

With the advantages and faults of direct speed estimating arithmetic and the Model Reference Adaptive System（MRAS） speed identify method which is based on the reactive power of induction motor magnetizing current, a kind of complex speed identify method, which combine with the direct speed estimating arithmetic and the MRAS speed identify method is put forward. Then, the dynamic characteristic and identification precision are im- proved highly. Simultaneously, the problem, when motor runs across the zero point of speed it will be out of control, is settled. Finally, computer simulations and experimental results verify its validity.