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Electric tire type gantry crane common DC bus device

A gantry crane and tire-type technology, applied in the direction of AC motor control, electrical components, single-network parallel feeding arrangement, etc., can solve the problems of energy waste and mutual utilization of energy, so as to reduce energy consumption and solve high energy consumption Problems, Effects of Realizing Recycling

Inactive Publication Date: 2011-12-14
CHINA WATERBORNE TRANSPORT RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, because the electric tire type gantry crane generally adopts the frequency conversion speed regulation control method, that is, the hoisting mechanism, the trolley running mechanism, and the cart traveling mechanism adopt independent frequency conversion speed regulation systems, which leads to the electric state and power generation of multiple motors. The energy between the states cannot be utilized mutually, the load potential energy of the hoisting mechanism and the energy generated by the braking of the traveling mechanism of the cart and trolley are all consumed by the brake resistor of the frequency converter in the form of heat energy, resulting in a large amount of energy waste

Method used

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  • Electric tire type gantry crane common DC bus device
  • Electric tire type gantry crane common DC bus device
  • Electric tire type gantry crane common DC bus device

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Embodiment Construction

[0009] Such as figure 1 As shown, the motor (3) with the encoder (7) is connected to the inverter system (2) to realize the closed-loop control of the motor; the inverter system (2) is connected to the common On the busbar (5), the common busbar (5) is connected to the rectification / feedback system (1); the grid voltage is rectified through the positive bridge in the rectification / feedback unit (13), generating stable, Reliable DC voltage. The fed back electric energy is fed back to the power grid through the autotransformer (12) after inversion by the reverse bridge in the rectification / feedback unit (13), thereby realizing the feedback of electric energy. The PLC control system (4) is connected to the rectification / feedback system (1) and the inverter system (1) through the industrial field bus Profibus, which improves the stability and efficiency of the system.

[0010] Such as figure 2 As shown, the rectification feedback / system (1) consists of five parts, the three-ph...

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Abstract

The invention relates to a common DC bus device applied to electric tire-type gantry cranes, which solves the problem of mutual utilization of energy between multiple motors in the electric state and power generation state, and can combine the load potential energy of the hoisting mechanism and the mechanism of the operating mechanism The energy generated during operation is fed back to the grid, which reduces the energy consumption of the electric tire gantry crane. The device consists of four parts: rectification / feedback system, common bus, inverter system and PLC system. The inverter system is used to drive the motor, and is connected to the rectification / feedback system through a common busbar through fast fuses. The common busbar will realize the mutual utilization of energy among different motors, and the electric energy generated by the motors will be fed back to the grid through the rectification / feedback system. The PLC system is connected to the rectification / feedback system and inverter system through the industrial field bus, which realizes the smooth and stable speed regulation of the electric tire gantry crane and the high recovery and utilization rate of energy.

Description

Technical field [0001] The invention relates to a common direct current bus device applied to an electric tire type gantry crane, which can effectively reduce the power consumption of the equipment during operation. Background technique [0002] At present, because the electric tire type gantry crane generally adopts the frequency conversion speed regulation control method, that is, the hoisting mechanism, the trolley running mechanism, and the cart traveling mechanism adopt independent frequency conversion speed regulation systems, which leads to the electric state and power generation of multiple motors. The energy between the states cannot be utilized mutually, the load potential energy of the hoisting mechanism and the energy generated by the braking of the traveling mechanism of the cart and trolley are all consumed by the brake resistor of the frequency converter in the form of heat energy, resulting in a large amount of energy waste. If this part of energy can be rec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02P27/06
Inventor 姚立柱刘晋川饶京川
Owner CHINA WATERBORNE TRANSPORT RES INST
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