Bridge crane is very widely used in industrial and mining enterprises, a kind of hoisting machinery, bridge crane, and more than a locomotives now attachment

Bridge crane is very widely used in industrial and mining enterprises, a kind of hoisting machinery, bridge crane, and more than a locomotives now attachment, use frequently, every day a lot of work. Bridge crane can work directly affect the completion of tasks of locomotive overhaul and the safety of person and equipment. Drag the original use of bridge crane system consists of wound rotor ac asynchronous motor, the rotor resistance multistage speed regulation in the series circuit, the CAM controller, the relay - hoist gantry crane control, the main shortcomings of this control system is: the motor rotor series resistance speed governing energy consumption type of slip speed regulation, large energy consumption and mechanical properties of soft, small range of speed regulation, and the smoothness is poor; Mechanical shock, steel crane the service life; Therefore, only completely change the way the original speed regulation can fundamentally solve the problem of bridge crane high failure rate. With the rapid development of electronic technology, frequency conversion speed governor performance, reliability, all had the very big enhancement, for its application in bridge crane drive system provides favorable conditions. We first for locomotive diesel engine assembling important work to 32 tons bridge crane frame of the big car drag system and hook system for frequency conversion transformation, to improve its operating performance, reduce the failure rate.