and expert system, have exhibited particular superiorities.
Artificial Intelligent Controller (AIC) could be the best
controller for Induction Motor control. Over the last two
decades researchers have been working to apply AIC for
induction motor drives [1-6]. This is because that AIC
possesses advantages as compared to the conventional PI, PID
and their adaptive versions. Mostly, it is often difficult to
develop an accurate system mathematical model since the
unknown and unavoidable parameter variations, and unknown
load variation due to disturbances, saturation and variation
temperature. High accuracy is not usually imperative for most
of the induction motor drive, however high performance IM
drive applications, a desirable control performance in both
transient and steady states must be provided even when the
parameters and load of the motor varies during the operation.
Controllers with fixed parameters cannot provide these
requirements unless unrealistically high gains are used. Thus,
the conventional constant gain controller used in the variable
speed induction motor drives become poor when the
uncertainties of the drive such as load disturbance, mechanical
parameter variations and unmodelled dynamics in practical
applications. Therefore, control strategy must be adaptive and
robust. As a result several control strategies have been
developed for induction motor drives within last two decades.
This paper presents the speed control scheme of scalar
controlled induction motor drive in open loop and closed loop
mode, involves decoupling of the speed and reference speed
into torque and flux producing components. Fuzzy logic,
artificial neural network and Adaptive Neuro-Fuzzy controller
(ANFIS) based control scheme has been simulated. The
performance of fuzzy logic, artificial neural network and
Adaptive Neuro-Fuzzy controller (ANFIS) based controllers
is compared with that of the conventional proportional integral
controller in open loop and closed loop. The dynamic
performance of the Induction motor drive has been analyzed
for constant and variable loads. Fig.1 and Fig.2 shows
proposed control scheme for an induction motor in open loop
and closed loop[9-12].