Frequency converting control system of tower crane

A frequency conversion control and control system technology, applied in the direction of load hanging components, transportation and packaging, etc., can solve the problem that the advantages of high efficiency, safety and energy saving of frequency conversion controllers are not well reflected, the energy saving effect of frequency converter control systems is discounted, There are hidden dangers in the safe operation and reliability of equipment, and the effect of eliminating hidden dangers of permanent deformation, improving reliability and safety, and obvious energy saving effect

Inactive Publication Date: 2014-02-05
山东科能电气设备有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, in the prior art, since the tower crane operates under light load most of the time, the maximum operating speed of the existing frequency conversion control system remains at a fixed frequency of 50Hz even under no-load and light-load conditions, and the maximum operating speed It cannot be adjusted automatically according to the load situation. This state consumes high energy and restricts the further improvement of the production efficiency of the tower crane. Since the maximum operating speed cannot be adjusted according to the load, the energy-saving effect of the inverter control system is greatly reduced. The impact on the mechanical structure during the process is large, and there are still hidden dangers in the safe operation and reliability of the equipment. At the same time, the potential of the frequency converter has not been fully utilized, so that the advantages of high efficiency, safety and energy saving of the frequency conversion controller have not been well reflected.

Method used

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  • Frequency converting control system of tower crane
  • Frequency converting control system of tower crane
  • Frequency converting control system of tower crane

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Embodiment Construction

[0022] In order to better understand the present invention, the implementation manner of the present invention will be explained in detail below in conjunction with the accompanying drawings.

[0023] Such as Figure 1 to Figure 8 As shown, a tower crane frequency conversion control system includes a PLC control system 10 and a tower crane lifting frequency conversion control system 2. The tower crane variable amplitude and frequency conversion control system 4, the tower crane command control system 9, the tower crane braking system 11, the tower crane safety control system 12, the tower crane load and moment detection system 13 are connected, and the lifting drive system 5 is connected with the tower crane lifting frequency conversion control system 2 , the slewing drive system 6 is connected to the tower crane slewing frequency conversion control system 3, the variable amplitude drive system 7 is connected to the tower crane slewing frequency conversion control system 4, th...

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Abstract

The invention discloses a frequency converting control system of a tower crane. The frequency converting control system comprises a PLC (programmable logic controller) control system and a tower crane lifting frequency converting control system, wherein the PLC control system is respectively connected with the tower crane lifting frequency converting control system, a tower crane rotation frequency converting control system, a tower crane amplitude and frequency converting control system, a tower crane command control system, a tower crane braking system, a tower crane safe control system and a tower crane loading and torque detecting system; a lifting driving system is connected with the tower crane lifting frequency converting control system, a rotation driving system is connected with the tower crane rotation frequency converting control system, and an amplitude changing driving system is connected with the tower crane amplitude and frequency converting control system; an electromechanical magnetism braking power supply, the tower crane lifting frequency converting control system, the tower crane rotation frequency converting control system and the tower crane amplitude and frequency converting control system are respectively connected with a main power supply; the electromechanical magnetism braking power supply is used for providing an electromagnetic braking input power supply for the tower crane braking system, and the tower crane braking system is respectively used for providing a tower crane braking executing power supply for the lifting driving system, the rotation driving system and the amplitude changing driving system.

Description

technical field [0001] The invention relates to the technical field of electrical control of construction machinery equipment, in particular to a tower crane frequency conversion control system. Background technique [0002] With the continuous upgrading of tower crane control methods in construction, tower crane frequency conversion control has been widely used. The application of the frequency conversion control system greatly reduces the labor intensity of production, improves the safety of the operation of the tower crane, and reduces the impact on the mechanical structure of the operation links such as lifting, turning, and luffing. However, in the prior art, since the tower crane operates under light load most of the time, the maximum operating speed of the existing frequency conversion control system remains at a fixed frequency of 50Hz even under no-load and light-load conditions, and the maximum operating speed It cannot be adjusted automatically according to the l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66C13/18B66C13/48
Inventor 刘培涛徐少田徐伟
Owner 山东科能电气设备有限公司
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