Abstract
PLC CONTROLLED STARTING ASYNCHRONOUS MOTORS WİTH REACTANCE COİL
Programmable logic controllers (PLCs) are electronic systems that designed too perate in
industrial facilities and operate according to digital principles. These devices are designed to
control a system with it shown analog ordigital input/output modules, functions such as
logical control, timing and counting. In addition, PLCs can be used to collect data depending
on various processes in production. These data are measurable data such as temperature,
ambient temperature, humidity and the like. In this study, starting condition of three phase
asynchronous motor controlled by PLC is investigated. Asynchronous motors draw about 3 to
7 times their rated current during the starting time. This current value is harmful to the
network. Thus, this current value is reduced by connecting the reactance coil to the stator of
the induction motors. The most commonly used motor type in the industry are asynchronous
motors. The fact that it has a simple structure that works with alternating current and also
requires low maintenance has made them more preferred in the industry than other motor
types. PLCs are devices that can control the execution of thework in a specific order. For
example; It can be used in the systems where the floors will be controlled in which order the
elevators will be in which order. PLCs are long lasting and reliable. They can work safely in
dusty, dirty, humid, electrically noisy environments. PLCs are very small and space-saving
devices according to their capabilities. This allows the PLCs to be installed in any
environment without any problems. In addition to logic-based operations, PLCs also include
commands for performing mathematical operations. These features are one of the reasons that
make PLCs superior. In order to be effective in today's world of competition, it is necessary to
use automation systems with PLC intensively in the industry.
Keywords
Programmable controllers, Asynchronous motor, Starting current of asynchronous motor
