Abstract:
As the demands of industries changes, so do the outputs of our basic electrical prime
movers, such as motors. DC motors are easier to control than AC motors, but they have
their own limitations as capacity increases. In contrast, AC motors, particularly
induction motors, are cost-effective, but speed control is difficult due to the need to
change the supply frequency. With the evolution of technology in driving systems,
controlling AC motors is now more cost-effective, simple to use, and allows for control
of a wide range of speeds both below and above the base speed. Motor drives can
change the voltage and frequency that is fed to the motor via a technique known as
Pulse Width Modulation (PWM). These devices are becoming more popular as a result
of their user-friendly features and low cost. These drives can be programmed for
automatic control, minimizing the need physical interference and can be configure
with computer because these drives employ an embedded system. AC drives are
increasingly being used in HVAC applications. Frequency drive are commonly used
in air handlers, chillers, pumps, and tower fans. The main goal ofthis dissertation is to
understand the operation, working and methodology to construct a flexy drive which
is basically an AC drive, using SPWM technique. In the future, this flexy drive
further be improved by using IGBT’s instead of MOSFETS. Flexy drive can further
be improved by controlling more than one motor or load using one drive.
