Abstract
An overhead crane, also known as an industrial crane, crane, or overhead travelling crane, is a device that lifts, lowers, and transports items horizontally. It is used to carry extremely heavy or bulky loads through the overhead area of a facility, as opposed to through aisles or on the floor. Gear box is used with purpose of reduction in speed; as a result, torque output will be increased. In place of gear box for achieving lower rpm at high torque, use of a permanent magnet direct drive (PMDD) in conjunction with a variable frequency drive (VFD) is written in this paper. Prototype of the same is designed to lift 100kg load and checked for its performance. Modelling and simulation are done in Simcentre MotorSolve for PMDD. This alternate arrangement can be used for hoisting mechanism of EOT crane which is able to give the torque of 40-65 N.m at 25-50 RPM to lift 100 kg load.
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