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DC bus powered crane power system

A DC bus and power system technology, applied to the improvement of the power system and the field of gantry cranes, can solve the problems of low working efficiency of the engine unit, and achieve the effects of saving equipment maintenance, saving energy, and working stably

Inactive Publication Date: 2007-04-11
罗中柱
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a crane power system with low operating cost in order to make up for the defect of low working efficiency of the engine unit of the crane power system in the prior art

Method used

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  • DC bus powered crane power system
  • DC bus powered crane power system
  • DC bus powered crane power system

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Embodiment Construction

[0024] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0025] Fig. 2 is the logical block diagram of the crane power system powered by the DC bus of the present invention, including a generator set 2 installed on the crane, a power supply and distribution system 3 connected to the output of the generator set, and a frequency conversion system 4 for obtaining electric energy from the power supply and distribution system 3 , and the speed-regulating motor 5 driven by the frequency conversion system 4 , and the DC energy storage device 6 bidirectionally connected with the power supply and distribution system 3 .

[0026] The working principle of the crane power system powered by the DC bus of the present invention is shown in FIG. 4 . The generator set 2 is composed of a diesel engine 21 and an asynchronous alternator 22 , and the power supply and distribution system 3 connected to the output end of the alterna...

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PUM

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Abstract

This invention discloses a hoist power system supplied by DC bus including a generator set, a supply and distribution system, a frequency conversion system and a speed regulation motor, in which, the supply and distribution system includes a large power commutation device, a DC bus and an energy management unit, the DC bus is parallel with a DC energy-storage device capable of supplying the conversion system at the same time, which includes several inverters connected on the DC bus, the speed regulation motor is a lifted motor, a jumbo motor or a trolley motor, in which, the lifted motor is converted to generator mode to store the re-generated energy source to an energy storage device when a lifted subject falls, the energy management unit controls the operation speed and generation volume of the generator set to realize real time match of output power and load power.

Description

technical field [0001] The invention relates to the technical field of cranes, in particular to the improvement of the power system of the lifting equipment. It is suitable for heavy-duty cranes with generator sets in ports, docks and other areas. It is mainly used for large and medium-sized port cranes, especially for gantry cranes. Background technique [0002] At present, the general power system configuration of mobile heavy cranes with generator sets in ports is to use high-power internal combustion generator sets in fixed-speed (power frequency) power generation mode to generate three-phase alternating current, which is transmitted to various electrical loads through the power supply and distribution system. , supplied to different inverter-driven lifting motors, cart motors and trolley motors, and other auxiliary electrical equipment. Its principle is shown in Figure 1, and the frequency converter converts AC / DC / AC twice. [0003] The power system of a conventional ...

Claims

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Application Information

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IPC IPC(8): H02P23/02H02P27/04H02P27/06H02J7/00H02J15/00H02P9/00
Inventor 罗中柱
Owner 罗中柱
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