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Monday 7 July 2008
Frequency Kobelco cranes partsconversion adjusts --three
Frequency
Kobelco cranes partsconversion adjusts --three
Systematic allocation plan of Fig. 1
The electric transmission
Hydraulic pumps control system of the hoist mainly and links the operations area to make up by the FR-A740-C9 series frequency converter of Mitsubishi, Siemens PLC control system, deal with pace designated signal to link operations area by control system through PLC, output looks preface and frequency to regulate frequency converter control and drive direction and rotational speed of the electrical machinery, replace a bunch of resistance of original traditional winding type rotor and adjust and drive the system rapidly. Among them the systematic structure chart of big car is as shown in Fig. 2, one raises the systematic structure chart as shown in Fig. 3.
Cart of Fig. 2, car frequency conversion adjust the systematic structure chart of the speed
3 of Fig. raise frequency conversion and adjust the systematic structure chart of the speed
The main characteristics of 3.2 control systems
(1) Original
hydraulics parts 4 exchange, wind the line asynchronous motor rotor central point directly short to connect, all rotor cable, resistor of return circuit, quick rheostat and all contactor cancel frequently.
(2) Drive a vehicle jacket 3 stainless steel switch board, protect grade IP54. Roll raise frequency conversion one of switch board, heavy, car one of switch board, + PLC of frequency conversion, apply the brake resistance first cupboard, the stainless steel cupboard has realized the antiseptic, dampproof, dustproof purpose, in order to adapt to oxidizing the requirement with abominable working environment of dust of corrosivity of the aluminium trade.
(3) The frequency converter selects FR-A740-C9 serial high-performance frequency converters for use, controlling a frequency converter systems soft ware which raises the electrical machinery adopts the lifting machine to employ greatly, the frequency converter systems soft ware which controls the big, car electrical machinery selects the standard for use to employ greatly.
(4) PLC selects
Kato genuine cranes partsSIEMENS S7- 200 series for use, controls making, stopping, fast, slow, order of promoting, transferring etc. that the handle sends out to PLC, corresponding PLC sends out positive and negative transferring to and various pace of the frequency converter of instruction control, in order to reach the best state
Japan construction machineries parts of a control of the bridge type hoist. |
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