中文摘要：

通过对MRAS和SMO进行分析，提出了一种基于MRAS和SMO相结合的永磁同步电机无速度传感器的控制方法。由SMO算法实现永磁同步电机定子电流的估计，构成MRAS算法的可调模型部分，实现了永磁同步电机转子转速的估计和整个系统的三闭环控制，详细介绍了基于MRAS和SMO相结合的永磁同步电机无速度传感器控制系统的建立并进行了测试。测试结果表明，该控制系统具有良好的低速调速功能、动静态性能和鲁棒性。

英文摘要：

From the anlysis of MRAS and SMO,a control method based on PMSM which is a combination of MRAS and SMO was proposed. The estimation of stator current is realized by SMO method which is composed of the adjustable model of MRAS method and realized the estimation of the rotor speed as well as the three close-loop feedback control of the whole system. How to build a speed sensorless control system of PMSM was illustrated based on the combination of MRAS and SMO and tested it. The test turned out that this control system have a good low speed adjustment and dynamic performance and robustness.