Overhead crane new application - inverter

   Speaking of  bridge gantry crane , has a wide application in industrial and mining enterprises, mainly used to achieve the object of lifting and transport. Its frequency control system is mainly about the following characteristics:
1 The original four AC induction motor rotor winding shorted directly to the center, all the rotor circuit cables, resistors, contactors frequency sensitive rheostat and the abolition of all;
2 In the lane Tops 3 stainless steel control cabinet, protection class ip54. Frequency control cabinet a winch, big, car inverter + plc control cabinet one, a braking resistor cabinet, stainless steel cabinet to achieve the anti-corrosion, moisture, dust purpose alumina industry to adapt to the harsh corrosive dust working environment requirements;
3  jib crane  inverter selection abb acs800 series high performance inverter, inverter motor control winch hoist system software application macros, control large car motor drive system software use the standard application macros;
4.plc selection siemens s7-200 series plc issued control handle to open, stop, fast, slow, promotion, decentralization and other instructions, the corresponding plc issued a directive to control the drive Reversible and various speeds to reach the bridge crane's best control state;
5 braking torque generated by the drive when the eot crane  motor from the load receiving mechanical energy into electrical energy it into the inverter, resulting in DC pressure, the inverter must deal with this part of the energy, or the DC circuit the capacitor is overcharged, over-voltage protection action will make it stop running, so set the inverter DC circuit braking unit and braking resistor, the crane falling released during braking energy consumption in the braking resistor ;
6.plc according to the control program, the input control signal and enhanced decentralization and other instructions to complete various conditions  hoist crane  coordination and control;
7 linkage console has two, can multiple speed control.