【摘要】 在电压型逆变器供电的交流异步电机驱动系统中,应用模型参考自适应(MRAS)磁链观测器进行磁链观测时,常用定子电压给定值代替实际值,从而带来幅值误差和直流偏值,造成磁链观测误差,影响电机低速运行的稳定性.为了提高交流异步电机无速度传感器矢量控制的低速性能,提出了一种定子电压幅值和直流偏置补偿办法,仿真实验验证了所提出方法的有效性更多还原

【Abstract】 When the induction motor system is driven by the voltage inverter, the MRAS (Model Reference Adaptive System) flux observer can be used to observe flux.In such cases, the reference value of the stator voltage, not the practical value, is used, which will cause amplitude error and DC offset, and affect the stability of low speed directly. This paper presents a new compensation method for stator voltage amplitude and DC offset, which can improve the performance of the speed sensor-less vector control of induction motor. The validity of the proposed method is also verified by simulation.更多还原