This paper presents the technique of how to
minimize power from the supply when a three-phase
induction motor is under the load test. The load test
enables the determination of the value of load power,
current and power factor of the induction motor. In
practice, a DC generator or eddy current brake is
applied for the mechanical test. The objective of this
paper is to propose a load test method using two pulleys
for changing speed of an induction motor. The second
induction machine is controlled to operate as an
induction generator in order to transfer the energy to
the supply, therefore the power required during the test
is obviously reduced. The study of how to control the
induction motor operated as generator will be the useful
information for developing the induction generator
system (IG) to work with variable speed and load, and
to make it work as a stand alone generator.