Implementation of Remote Self-Tuning Fuzzy PID Controller for Induction Motor Through Ethernet

Due to the non-linearity, complexity and time-varying dynamics of the Induction motor, therefore conventional controllers such as proportional-integral-derivative (PID) controller cannot ensure speed step response specifications in all speed range. This paper presents self tuning fuzzy PID (STFPID) controller to improve speed control of high speed three phase induction motor. the Mamdani Method fuzzy logic controller (FLC) tunes only the PID gains separately and the structure of the PID is not altered. In this paper, a two inputs and three outputs self adapting fuzzy PID controller was designed to control the speed of induction motor drive. The programmable logic controller (PLC) type Siemens Simatic 57-300 dominates the control system and the real time data communication between the PLC and personal computer (PC) using third party software like Lab VIEW is realized using OLE for Process Control (OPC) server. Fuzzy logic is developed using fuzzy toolbox available in Lab VIEW and OPC server fetch data from the OPC server. The proposed method can be used to realize data process and advanced control to improve the quality of the whole control system. The experimental results demonstrate that the remote STFPID controller (FLC is PC based and PID PLC based) has better performance in both transient and steady state response when compared with conventional PID controller in both PLC and PC modes.