串级控制系统在电机控制中的仿真研究

The Simulation Research of Cascade Control System in the Control of Motor

当前对电机的控制技术和调节质量要求很高,而传统的单回路控制系统无法更好地满足对控制电机的高要求,现将串级控制系统应用到电机的控制中去。串级控制系统是一个双回路系统,它的副回路的对象惯性小,工作频率高,而主回路惯性大,工作频率低。由于控制系统增加了一个副回路,当干扰落于副回路时,其抗干扰能力比同等条件下的单回路控制系统提高了。仿真发现,该系统能通过改变PI调节器、PID调节器的参数,使超调量减小5%,调节时间缩短7%,体现出串级控制系统在电机控制中的优越性。

At present, optimal control technology and high regulating quality of motor are required, but the traditional single-loop control system is unable to meet such high requirements of the control motors. Cascade control system is applied to the control of motor, which is a double-loop system. The object inertia of it＇s Vice-loop is small, and the frequency of work is high, but the inertia of main circuit is large, and frequency of work is low. As a Vice-loop is increased in the control system, that is approximately equal to the interference falls in the Vice-loop, the capability of anti-jamming is more improved than the single-loop control system in the same conditions. Through the simulation, it is found that this system can reduce the amount of overshoot by 5%, and shorten regulation time by 7% through changing the parameters of PI regulator, PID regulator. The superiority of cascade control system is reflected in the control of motor.