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Combined speed regulating device for frequency changer of mine ventilator

A technology of speed regulating device and frequency converter, which is applied in the direction of output power conversion device, cooling/ventilation/heating transformation, circuit layout on support structure, etc. Larger, higher manufacturing costs and other issues, to achieve the effect of improved work stability and reliability, wide range of air volume adjustment, and reliable starting performance

Active Publication Date: 2011-04-27
PINGAN ELECTRICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This increases its manufacturing cost, and takes up a lot of space in the coal mine roadway, and the heat dissipation efficiency is not high
At the same time, its working stability and reliability are difficult to be guaranteed.

Method used

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  • Combined speed regulating device for frequency changer of mine ventilator
  • Combined speed regulating device for frequency changer of mine ventilator
  • Combined speed regulating device for frequency changer of mine ventilator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1, the present invention consists of two half-shells connected and fixed by the flameproof joint surface, and the two ends are closed to form a cylindrical inverter body 1, which is arranged between the connecting surfaces of the two half-shells. There is an explosion-proof joint surface, the inverter body 1 is installed in the center of the cross-section of the inverter fan duct 2, and a support connection device 10 is arranged between the inverter body 1 and the inverter fan cylinder 2. The support connection device 10 in the present invention can be used. Supporting members such as connecting screws, connecting struts or connecting struts are used. The wall of the inverter body 1 is provided with a connection cable connection hole, and the inverter fan duct 2 is provided with a connection box connection hole corresponding to the position of the connection cable connection hole provided on the inverter body 1. The connection wires of the junction box outsid...

Embodiment 2

[0021] In Embodiment 2, the present invention can also be fitted with a filter in the frequency converter body 1 . By installing the filter, the conducted interference and emission interference generated by the inverter can be reduced, the voltage and current harmonic interference can be resisted, the power quality can be improved, the external interference of the frequency conversion device can be reduced, and the reliability of the safe use of other electronic devices in the well can be improved. see figure 1 and figure 2 , and the rest are the same as in Example 1.

Embodiment 3

[0022] Embodiment 3, the present invention can also install a filter device composed of a magnetic ring in the wiring pipe device 3, and convert the high frequency component into heat loss by using the eddy current loss of the magnetic ring to the high frequency signal. Therefore, the magnetic ring actually absorbs the high-frequency components, which can also be called an absorption filter. It no longer needs to install special filters at the incoming and outgoing ends of the frequency conversion speed control device, which reduces the space of the inverter body and saves materials. see figure 1 and figure 2 , and the rest are the same as the above-mentioned embodiments.

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Abstract

The invention provides a frequency converter speed regulation device specially used for a combined mine fan, which solves the technical problems that the existing speed regulation device of the frequency converter has large laneway occupying space, the heat dissipation efficiency is not high, the existing speed regulation device has bad operation stability and reliability and the like. The key point of the technical proposal is that the frequency converter body is formed by the connection of two semi-shells; furthermore, an explosive-proof welding surface is arranged between the connecting surfaces; the frequency converter body is arranged in the center of the cross-section of fan drum of a frequency converter; a supporting connection device is arranged between the frequency converter body and the fan drum of the frequency converter; the wall of the frequency converter is provided with a wiring cable connection hole; the frequency converter fan drum is provided with a wiring box connection hole; the connection wire of the wiring box arranged outside the fan drum of the frequency converter respectively passes through the wiring box connection hole and the wiring cable connection hole and is then connected with the electric bus which is arranged inside the frequency converter body. The frequency converter speed regulation device effectively solves the heating problem of the power element of the frequency converter regulation device, improves the operation stability and reliability and can be widely applied to the control on the equipments such as fans, local fan and the like under wells.

Description

technical field [0001] The invention relates to a frequency converter speed regulating device, in particular to a frequency converter speed regulating device used in ventilation equipment. Background technique [0002] At present, the main ventilation equipment in the underground excavation process of coal mines is a local fan, and the local fan is an AC motor. Because the AC motor has the advantages of simple structure, convenient manufacture, reliable operation, and low price, but it cannot easily achieve economical wide-range smooth speed regulation like a DC motor. For the working environment of coal mines, it is hoped that the fan or local fan control device that can adjust the air volume and control the gas emission speed according to actual needs can achieve the purpose of energy saving and safe gas discharge. In this situation, the variable frequency speed regulators used in coal mines came into being. It is a power control device that converts the power frequency ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05K7/02H02M1/12H05K9/00H02M1/00H05K7/20
Inventor 陈重新肖务理胡新明罗梅林周明辉黄科李柳春
Owner PINGAN ELECTRICAL
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