Abstract-
Due to the high percentage of induction motors in
industrial market, there exist a large opportunity for energy savings.
Replacement of working induction motors with more efficient ones
can be an important resource for energy savings. A calculation of
energy savings and payback periods, as a result of such a
replacement, based on nameplate motor efficiency or
manufacture’s data can lead to
large errors [1]. Efficiency of
induction motors (IMs) can be extracted using some procedures
that use the no-load test results. In the cases that we must estimate
the efficiency on-line, some of these procedures can’t be efficient.
In some cases the efficiency estima
tes using the rating values of the
motor, but these procedures can have errors due to the different
working condition of the motor. In this paper the efficiency of an
IM estimated by using the genetic algorithm. The results are
compared with the measured values of the torque and power. The
results show smaller errors for this procedure compared with the
conventional classical procedures, hence the cost of the equipments
is reduced and on-line estimation of the efficiency can be made.