Energy consumption braking device for tunnel fan

A technology of energy-consumption braking and fan, applied in electromechanical devices, ventilation of mines/tunnels, mining devices, etc., can solve the problems of high cost and high energy consumption of devices, and reduce consumables, energy consumption, and power consumption and the effect of starting frequency

Pending Publication Date: 2019-02-12
CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cooling fan needs to be started frequently, the device itself consumes a lot of energy and costs a lot

Method used

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  • Energy consumption braking device for tunnel fan
  • Energy consumption braking device for tunnel fan
  • Energy consumption braking device for tunnel fan

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Embodiment Construction

[0015] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0016] In the description of the embodiments of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer " and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only ...

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Abstract

The embodiment of the invention provides an energy consumption braking device for a tunnel fan. A direct current is injected into a stator winding coil of the tunnel fan through an isolation transformer and a rectification module, a magnetic field with the direction being opposite to the direction of a magnetic field generated due to the fact that the tunnel fan continues to rotate forward becauseof inertia is generated, about half of the braking time can be reduced effectively, the braking process of the tunnel fan is rapidly achieved, the braking effect is significant, and the problems caused by the excessively long braking time can be effectively avoided. By additionally arranging the isolation transformer and the rectification module in the energy consumption braking device, an energyconsumption braking resistor of a traditional energy consumption braking device can be omitted, power consumption and the starting frequency of the tunnel fan are lowered, and energy consumption of the energy consumption braking device is effectively lowered. Meanwhile, the equipment mounting space is optimized, the size of a control cabinet of the tunnel fan can be decreased, consumables are reduced, and cost lowering and energy saving are achieved.

Description

technical field [0001] The embodiment of the present invention relates to the technical field of urban rail transit, and more specifically, relates to a dynamic braking device for a tunnel fan. Background technique [0002] At present, the "Subway Design Code" GB50157-2013 requires that the time required for the fan in a subway tunnel to change from a normal state to an accident state (that is, the switching time between forward and reverse states) should not exceed 60s. The forward and reverse state switching of the subway tunnel fan is usually realized by the energy consumption braking device of the tunnel fan. [0003] The traditional energy consumption braking scheme of tunnel fans is mainly realized through the soft stop function of the soft starter. The soft starter uses three-phase parallel thyristors as the voltage regulating device, which are connected in series to the power supply and the stator end of the tunnel fan. When using a soft starter to start the motor,...

Claims

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Application Information

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IPC IPC(8): E21F1/08E21F17/00F04D27/00H02K7/14
CPCH02K7/14E21F1/003E21F1/08E21F17/00F04D27/008
Inventor 李强卢光明李汉伟庄永宁吴江涛王德发刘苏敏龚孟荣周龙袁剑
Owner CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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