中文摘要：

为了克服常规PID速度控制器的缺点，有效抑制状态变量的超调问题，加快转子的收敛速度，增强系统的抗干扰性，提出了一种用于表面式永磁同步电动机的上下界滑模变结构速度控制器。与常规PID速度控制器不同，该控制器将速度误差与系统状态量的变化相关联，通过预设负载转矩的上下界值来实时改进滑模控制率。该控制器可取代常规PID控制器应用于永磁同步电动机矢量调速系统中。仿真和实验结果表明，基于上下界的滑模变结构控制器能够有效地提高系统的静态、动态特性与鲁棒性。

英文摘要：

A sliding mode variable structure speed controller was proposed for surface permanent magnet synchronous motor in order to overcome the drawback of conventional PID speed controller,to effectively curb the state variables of overshoot problems, to speed up the convergence speed of the rotor, and to en-hance the anti-interference of the system.Unlike conventional PID speed controller, the controller associ-ated speed error with the quantity of system state.The load torque values is real-time controlled by the default upper and lower bounds sliding mode variable structure controller.It can replace the conventional PID controller with the applications to the permanent magnet synchronous motor vector control system. Simulation and experimental results show that sliding mode variable structure controller based on the up-per and lower bounds can effectively improve the static and dynamic characteristics and robustness of the system.