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在当前三相永磁同步电机(PMSM)的控制,一般都是传统的PI控制,因为PI调节器的结构简单、可靠性高、参数简单、便于计算等优点,受到工业界广泛应用。但是,由于三相PMSM本身内部结构复杂,各个参数之间具有强耦合性,所以系统的抗外界干扰能力很差,传统的PI调节器并不能满足系统控制要求。而滑模控制,所具有的抗外界干扰能力强、响应速度快等优点,恰恰弥补了PI调节器的不足,在三相PMSM速度控制中能够具有更好的效果。
In the current control of three-phase permanent magnet synchronous motor (PMSM), the traditional PI control is generally adopted. Because of its simple structure, high reliability, simple parameters and easy calculation, the PI regulator has been widely applied in the industry. However, due to the complicated internal structure of the three-phase PMSM and the strong coupling between the various parameters, the capability of the system to resist external interference is poor. The traditional PI regulator can not meet the requirements of system control. The sliding mode control, with the ability of anti-interference ability, fast response and other advantages, just make up for the lack of PI regulator, three-phase PMSM speed control can have better results.