Abstract
The aim behind the development of the project is to limit the current at starting of motor and to develop the high starting torque. There are different methods of starting of 3-phase Slip-Ring induction Motor. However, we selected the rotor resistance method of control for Starting the Induction Motor. Here a Programmable Logic Controller is used which will be programmed as per our need. We have designed a control panel and programmed the PLC according to our need. The motor starts with high rotor resistance and as time elapse the rotor resistance will be shorted and the motor runs at rated speed. The resistance has been cut from the rotor in three parts in three different time intervals. The process of management of time and controlling of relays is the function of the PLC. Depending on PLC output, the relays will get shorted and the resistance will be removed from the rotor terminal.
Keywords: PLC, 3-phase Slip-Ring induction Motor
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