Crane frequency conversion speed regulation control system
A frequency conversion speed regulation and control system technology, applied in control systems, AC motor control, electromechanical devices, etc., can solve problems such as mechanical structure impact safety, achieve good safety, prolong service life, and reduce mechanical transmission impact.
Active Publication Date: 2012-02-01
SICHUAN CONSTR MACHINERY GRP
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is to propose a crane frequency conversion speed regulation control system to solve the problem that the speed regulation methods in the prior art are all stepped speed regulation, causing huge impact on the mechanical structure and low safety
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Embodiment
[0017] The crane frequency conversion speed regulation control system in this example includes linkage operation control platform, frequency converter, pulse coder, frequency conversion motor, resistance box, brake, reducer and reel; pulse coder, frequency conversion motor, resistance box and brake are all Connect the frequency converter; the frequency conversion motor is connected to the pulse encoder, brake and reel; the brake is also connected to the reel; the reducer is connected to the frequency conversion motor and the reel.
[0018] Start the power button of the tower crane, the main contactor in the power control box is closed, and the tower crane gets working power. Press the reset button, the contacts of the emergency stop button are in the normal state, the contactor in the inverter is closed, and the power supply starts to work.
[0019] When the linkage operation control platform gives the lifting operation control direction and braking switch signal and the given...
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The invention relates to an automatic control system, in particular to a variable-frequency speed-regulating control system of a crane. The invention discloses a variable-frequency speed-regulating control system of a crane, which solves the problem that in the prior art, the speed-regulating modes are step speed regulation respectively so as to cause huge impact on the mechanical structure and have low safety. The key point of the technical scheme is characterized in that the variable-frequency speed-regulating control system of the crane comprises a linkage operating control platform, a transducer, a safety protection device, a variable-frequency motor, a motor detect device, a reducer, a winding drum and a brake, wherein the linkage operating control platform provides linkage operatingcontrol instructions; the motor detect device, the variable-frequency motor, the safety protection device and the brake are all connected with the transducer; the variable-frequency motor is connectedwith the motor detect device, the brake and the winding drum; the brake is connected with the winding drum; and the reducer is connected with the variable-frequency motor and the winding drum. The variable-frequency speed-regulating control system has the beneficial effects of having wide speed regulation range, high positioning accuracy and good safety, reducing the mechanical transmission impact, prolonging the service life of the crane, and being especially applicable for column cranes.
Description
technical field [0001] The invention relates to an automatic control system, in particular to a crane frequency conversion speed regulation control system. Background technique [0002] At present, the speed regulation methods commonly used in the hoisting mechanism of domestic tower cranes (tower cranes) are traditional AC speed regulation methods, which roughly include: pole-changing speed regulation, winding motor rotor series resistance plus eddy current regulation and electromagnetic clutch shifting at the same time. Speed regulation, two winding motors, one rotor series resistance and the other motor energy consumption braking speed regulation, double winding motor rotor series resistance speed regulation, etc. [0003] The devices corresponding to the above several speed regulation methods are simple in structure and low in cost, but they also have disadvantages: all of them have stepped speed regulation, which will cause a huge impact on the mechanical structure an...
Claims
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IPC IPC(8): B66D1/12B66C13/16B66C13/22B66C13/30B66C13/40H02P27/04H02K11/00H02K11/20H02K11/21
Inventor 唐祖炜潘康乐朱晓丽
Owner SICHUAN CONSTR MACHINERY GRP