关键词: 异步电机, 无速度传感器, 转速估算, 模型参考自适应法

Abstract: Speed sensorless technology accurately calculates the rotor position and rotor speed of asynchronous motor by the data collected by voltage and current sensors. In order to solve the problems brought by the traditional MRAS (model reference adaptive method) in flux estimation, and a PI calculation method instead of integration calculation was proposed to solve the problem of integral saturation and inaccurate initial value.The accuracy and feasibility of the control methods were verified by simulation analysis and experiment.

Key words: asynchronous motor, speed sensorless, speed estimation, model reference adaptive system (MRAS)