Electrical Drives for Crane Application

Bond Graph Modeling and Control of Induction Motor used in Ladle Cranes

“…Motor Speed at on load condition reached at 52.1 rad/sec after attaining it after transition period of almost 100 sec. Total power drawn during on load is 190.685 Kw but initially during transition period the maximum power drawn is 7.92x10 5 Kw from the graph at Fig.14. Thus by changing the V/f ratio we can find the differences in graph and can design the induction motor for the optimum values.…”

“…For the lifting and lowering drive, the speed control in a wide speed range, from zero to nominal Because of the precision when rising and lowering ladle, the possibility of working at a very low speed and hold the ladle in the standstill is required, hanical brakes. The torque and power that have to be delivered by the drive may be obtained from the torque versus speed characteristic as called mechanical the differential equation of motion, et al, 1993; Mitrovic et al, 2011) [5]. The goal of this research is to present the physical model of the motor and to develop a bond graph models, in order to obtain a unified approach on modeling of the induction machines for control purposes , adopting an emphasize the control in lieu of the classical electrical engineering viewpoint.…”

The Monospiral Motorised Cable Reel in Crane Applications

“…In the paper [7] all the hoist drives are described in detail. In this paper, the cable reel drive from the point of motor selection is described.…”

“…One option is to select the drive which contains the braking chopper with an appropriate resistor. The other option is to select the drive with regenerative capability [7].…”

“…Some experts have only considered electrical energy saving methods. For example, [7,8] an energy-saving method based on energy recovery by active front end rectifier (AFE) at the input of frequency converter is proposed. The AFE provides four quadrant operation of drive, which means in motoring and regenerative operation mode.…”