四象限永磁同步电机伺服系统模糊自适应控制

Fuzzy Adaptive Control of Four Quadrant Permanent Magnet Synchronous Motor Servo System

为了实现永磁同步电机伺服系统的四象限运行,本文设计了新的背靠背变换器调节方案,给出了带有直流母线的背靠背四象限永磁同步电机驱动系统模型,网侧采取模型参考自适应调节,实现了直流母线电压可控和功率因数为1;机侧采取了基于模型参考的自适应模糊控制,实现电机侧的速率跟踪。通过网侧和机侧节制,实现了能量流的双向流动、直流母线电压可控、单位功率因数和永磁同步电机的四象限运行,并采用Matlab软件对伺服系统进行仿真验证。仿真结果表明,当电机侧采取了模型参考的自适应模糊调节和i*md=0的电压定向调节时,直流母线电压虽然具有微小的变动,但系统可以很快达到期望值,速度跟踪性能良好,证明了所提出的背靠背变流器的模糊自适应控制系统的有效性。该研究具有良好的应用前景。

In order to achieve the four quadrant operation of permanent magnet synchronousmotor(PMSM)speed drive system,a novel back-to-back convertercontrol scheme is presented in this paper,and the DC link of the back-to-back four quadrant permanent magnet synchronous motor drive system model is given.The direct model reference adaptive control(MRAC)controller is designed with new error function in the grid-sidefor the purpose of getting the controllable direct current(DC)bus voltage and unitypower factor control.Furthermore,the model reference fuzzy adaptive control(MRFAC)is designedto preciselyachieve the speed tracking control in the motor-side.The bidirectionalenergy flow,the controllableDC bus voltage,the unity power factor and the four quadrant operation of themotor are obtained based on the coordination control strategy of the grid-side and motor-side.Matlar software is used for simulation of the servo system.As can be seen from the Simulation results,the DC bus voltage has small fluctuation when the motor used the fuzzy direct MRAC control and voltage oriented control withi*md=0.But it returns to the steady state rapidly,and the system has good speed tracking performance.Simulation results confirm the effectiveness of the proposed control strategy.The study has a good prospect.