Fuzzy PID controller for fast direct torque control of induction motor drives

Abstract

Direct torque control (DTC) has been employed to give fast torque response, which is very important in traction and electric vehicle applications, in high dynamic performance Induction Motor (IM) drives. Fast torque response can be achieved by optimizing the selection of the inverter voltage vectors in the conventional DTC. This paper introduces a method for selecting voltage vectors; in DTC controlled IM drives, to achieve fast torque response at constant switching frequency. Also, the application of the Fuzzy PID (FPID) control technique improves the system speed and torque responses. Simulation results show that both torque and speed responses are faster with the proposed controller than the conventional DTC.