Fuzzy Logic based Current Control Schemes for Vector-controlled Asynchronous Motor Drives

摘要

In this study, a kind of two-dimensional fuzzy PID controller is designed acted as current regulator of SVPWM asynchronous motor vector-controlled drives for the sake of improving the dynamic and steady state performance of current control of this type of system. Two kind of control schemes are proposed here according to the different requirements for current response performance of d and q axis in vector control. One kind is that a fuzzy PID controller is applied to the q-axis current loop and a conventional PI controller is applied to d-axis current loop. The other one is that a fuzzy PID controller is applied to the q-axis current loop and a conventional PI controller is applied to d-axis current loop. The simulation results show that the current regulator with fuzzy PID controller possesses better dynamic and steady state performance compared to counterpart of general PI controller.