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Intelligent frequency conversion combination switch

A combination switch, intelligent technology, applied in the direction of controlling multiple AC motors, etc., can solve the problems of many fault points, complex fault handling, changing pump flow, etc., to achieve the effect of easy production process, reduced cost investment, and reduced length

Pending Publication Date: 2021-03-26
BEIJING HUAHAI MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The first is a power frequency combination switch plus a comprehensive protection device for lighting signals. Its disadvantages: it can only provide power frequency power supply with a fixed frequency, and cannot adjust the speed of the pump motor to achieve the purpose of changing the pump flow; because the pump station generally has 3 - 4 voltage levels, this power supply mode needs to be equipped with a variety of different types of power frequency combination switches and lighting signal comprehensive protection devices, which increases the difficulty of maintenance and troubleshooting, and also increases the number of communication circuits, making the control system more efficient. complex
[0004] The second is the multi-circuit split inverter processing frequency combination switch plus lighting signal comprehensive protection device. Its disadvantages are: the split inverter is added on the basis of the power frequency power supply, which makes the power supply system more complicated, and the maintenance and failure It is more difficult to deal with; there are more communication circuits, and there are at least two types of communication, the control is difficult, there are many fault points, and the fault handling is more complicated; the addition of multi-circuit inverters makes the cost increase significantly
[0005] The existing variable frequency combination switch usually only has one voltage level, which cannot meet the diverse voltage requirements of load equipment
In a general pumping station system, there are at least 5 main pump motors that need frequency conversion and speed regulation, and there are even 8-10. In order to meet the frequency conversion and speed regulation of these main pump motors, it is necessary to configure each motor in the frequency conversion combination switch Inverter, which will lead to extremely high purchase cost of inverter switch

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Embodiment Construction

[0026] In order to make the purpose, content, and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] Such as figure 1 As shown, an intelligent frequency conversion combination switch provided by the present invention includes a frequency conversion main circuit isolating switch G1, a power frequency main circuit isolating switch G2, a power frequency auxiliary circuit isolating switch G3, a frequency converter, a power frequency / frequency double switching contactor KM3, KM4, KM5, KM6, KM7, KM8, frequency conversion main circuit contactor KM1, power frequency main circuit contactor KM2, power frequency auxiliary 1140V output contactor K1, K2, K3, auxiliary 660V output contactor K4, K5, K6, auxiliary 127V output contactors K7, K8, K9, auxiliary transformer 3300V / 1140V, auxiliary transformer 1140V / 660V, auxiliary ...

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Abstract

The invention relates to an intelligent frequency conversion combination switch, and belongs to the technical field of hydraulic pump stations of underground fully mechanized coal mining faces of coalmines. The intelligent frequency conversion combination switch is used for supplying power, six sets of frequency converters, a 10kV / 1140V transformer, four 1140V-8 power frequency combination switches and two ZBZ-10.0 comprehensive protection devices are omitted compared with a common power supply mode, the cost investment is greatly reduced, meanwhile, due to the fact that the size of one intelligent frequency conversion combination switch is similar to the size of a three-combination frequency converter, the power supply mode of the intelligent frequency conversion combination switch is used to help coal mine clients to greatly reduce the length of the equipment train, so that the equipment maintenance and production process becomes easier. Meanwhile, the control system can control starting, stopping, protection and speed regulation of the whole pump station through communication between one path and the intelligent frequency conversion combination switch.

Description

technical field [0001] The invention relates to the technical field of a hydraulic pump station for a fully mechanized mining face in a coal mine, in particular to an intelligent frequency conversion combination switch. Background technique [0002] At present, the power supply system of the hydraulic pump station in the fully mechanized mining face of the coal mine adopts the following structure: [0003] The first is a power frequency combination switch plus a comprehensive protection device for lighting signals. Its disadvantages: it can only provide power frequency power supply with a fixed frequency, and cannot adjust the speed of the pump motor to achieve the purpose of changing the pump flow; because the pump station generally has 3 - 4 voltage levels, this power supply mode needs to be equipped with a variety of different types of power frequency combination switches and lighting signal comprehensive protection devices, which increases the difficulty of maintenance a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P5/74
CPCH02P5/74
Inventor 褚峰伟杨淑芳杜建华
Owner BEIJING HUAHAI MACHINERY
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