中文摘要：

据永磁同步电机的数学模型及滑模变结构控制理论,设计了新的滑模观测器用于估算电机的转子位置和速度,实现永磁同步电机无传感器控制。在传统滑模观测器基础上进行了三次改进,采用饱和函数代替开关函数,将饱和函数进行反正切函数优化,并引入截止频率可变的低通滤波器。设计了一种应用滑模变结构理论与常规PID控制的混合控制方法,削弱了抖振问题,提高了转子位置和速度估算精度,实现了永磁同步电机的精确控制。仿真结果验证了其可行性和有效性。

英文摘要：

According to the mathematical model of permanent magnet synchronous motor ( PMSM ) and the variable structure control theory of the sliding-mode controller, a novel sliding-mode controller was designed to estimate the position and speed of the rotor, realizing sensor-less control of PMSM. The controller is improved three times of three based on the traditional sliding-mode controller;namely the saturation function is adopted to replace the sign function, then the saturation function is replaced by the arctangent function where the low pass filter uses variable frequency as feedback to the controller. A hybrid controller was proposed, which used the compound sliding mode variable structure theory and the traditional PID control algorithm, realizing accurate control of the PMSM. The estimation of the position and speed of the rotor was improved greatly by effectively reducing the chattering problem. The simulation results showed the feasibility and effectiveness of the proposed method.