Fuzzy logic based topological approach for monitoring speed reversal in induction motor

This paper discusses a fuzzy-logic extended robust vector control for asynchronous motor in case of fault. Direct torque control is known to produce quick and robust response in AC drive system. However, in the steady state, fault may occur. So, the performance of conventional PID regulator can be improved by implementing fuzzy logic techniques. First, the whole system including the capacitors, the induction generator, and the loads is modeled. The model is obtained using the Park transformation. The results are compared with standard PID control. This approach is applied on three-phase asynchronous motor (LS90Lz). The study presented improves the transient response time and servo system accuracy. An inversion of the rotational reference velocity is considered and the results are very consistent.

I. Introduction

Applicability of classical control methods has been demonstrated in many practical control problems in the industry. However, it has been demonstrated that unanswered questions still remain, which can probably be solved with the fuzzy system approach [1], [2].