Simulation of Step-down Cycloconverter For Speed Control of Single Phase Induction Motor
Keywords:
Speed control, induction motor, cycloconverter, Simulink, Split phase, MATLAB.Abstract
This paper describes new techniques for controlling naturally commutated,
circulating current free cycloconverter when used to drive induction motors. Simulation of
step-down cycloconverter for speed control of split phase capacitor start induction motor is
shown in this paper. The cycloconverter is device that converts ac supply of one frequency
into ac supply of different frequency without any dc stage in between. It can be also consider
as a static frequency changer and typically contains silicon-controlled rectifiers. A.C. motors
have the great advantages of being relatively inexpensive and very reliable. Induction motors
in particular are very robust and therefore used in many domestic appliances such as washing
machines, vacuum cleaners, water pumps, and used in industries as well. The induction motor
is known as a constant-speed machine, the difficulty of varying its speed by a cost effective
device is one of its main disadvantages. As the AC supply frequency cannot be changed, so
the use of a thyristor controlled cycloconverter which enables the control of speed in steps for
an induction motor is solution for this problem.
