Frequency Kobelco cranes parts conversion adjusts --two
Posted on Jul. 7, 2008 at 08:08 (Subscribe)
Frequency
the practical application
(4) Rotor component in order to consume energy purely of a bunch of resistance when the hoist starts, adjusts speed, waste a large amount of electric energy. In addition, because of adjusting the restriction of the speed resistance, adjust speed range narrowly, it is small to start the torque, lengthen the time of starting, influence production efficiency;
(5) It is carried on under the motion state that the system cherishes the floodgate, damage the brake greatly, the floodgate cover is worn and torn seriously.
Problem existing to actual production, determine hoist implement by new to link control cabinet, PLC, high-performance frequency conversion adjust, fit whole technological transformation
3 systems transform the implementation of the scheme
3.1 Systematic disposition
The electric transmission of the bridge type hoist of packing shop has * 2 motor 7.5kW of carts, * 1 motor 2.2kW of cars, one raises * 1 motor 15kWs. The technological transformation scheme implemented adopts 3 frequency converters to control 4 electrical machineries, among them one raises the motor and car motor to drive with a FR-A740-37KW-C9 and FR-A740-3.7KW-C9 frequency converter respectively, two motors of cart are driven with a FR-A740-30KW-C9 frequency converter, realizes synchronous operation, each frequency
0 comments :: post a comment :: travel post link ::