International Scientific Journal of Engineering and Management

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Automatic Star Delta Starter Using Relays and Arduino for Induction Motor

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Automatic Star Delta Starter Using Relays and Arduino for Induction Motor

Automatic Star Delta Starter Using Relays and Arduino for Induction Motor

P.B. Khedkar (Lecturer )

Durga Kadam , Pathan Mahevish , Kadam Rukmin , Honrao Gayatri

Department of Electrical engineering

Government Polytechnic Nanded .

Abstract—Star or Delta starters are the most common reduced voltage starters in the 50 Hz industrial motors. They are used in an attempt to reduce the starting current applied to the motor during start. The Star/Delta starter is generally manufactured using three contactors, a timer and a thermal overload for operating a 3-phase motor at 440 volt at AC mains supply of 50 Hz. However, in our project we have taken up the same to operate a 3-phase motor at 440 volt AC mains 50 Hz with a set of 12 volt DC relays an electronically adjustable timer provided through arduino and a set of miniature circuit breakers. The interlocking arrangement often relay coils and the electronic arduino is all wired in low-voltage DC of 12 Volt fed from an in-built DC power supply for safe handling of the starter during the study, still retaining its application for a 3-phase motor starting with a single phasing prevention. The timer comprises of Arduino the output of which is fed to a relay for changing the mains supply from 3-phase star to delta. The project also has the provision of single phase protection, since the 3-phase motors may get burnt if any one phase goes missing during operation. The output to the lamps shall be completely cut off in the event of any phase failure. Furthermore, the project can be enhanced by using thyristors in a firing angle control principle for soft start of the induction motor that would overcome all the drawbacks of the star delta starter.

 

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