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Up gradation of Overhead Crane using VFD

Sayali T.Nadhe, Supriya N.Lakade, Ashwini S.Shinde

The industrial revolution have put the use of overhead crane in variety of diverse applications to move heavy and oversized objects that other material handling methods cannot. Electrical technology for crane control has undergone a significant change during the last few decades. The shift from Ward Leonard system to DC drive technology and the advent of powerful Insulated Gate Bipolar Transistors (IGBTs) during the 1990s enabled the introduction of the AC drive for motor speed control. Conventional system uses slip ring induction motor for crane control. In this paper we are exploring the method for upgrading conventional system for overhead crane control using Variable Frequency Drive(VFD) and demonstrate that upgraded technology provide cost effective means to make system more efficient, productive and safer.