Insulation state monitoring device for high-voltage motor for mine main ventilator

Abstract

The invention discloses an insulation state monitoring device of a high voltage motor for a main fan used for mines, aiming to monitor insulation parameters, such as stator temperature, insulation resistance, local discharging parameters and the like on line so as to improve the stability and the reliability of the main fan for mines. The insulation state monitoring device comprises a local discharging sensor unit, a local discharging signal amplification unit, a local discharging signal filter unit, a three-phase voltage transformer, a trigger signal generation unit, a data acquisition board, a three-phase reactor unit, a sampling resistance network unit, an insulation resistance signal conditioning unit, an insulation resistance signal A / D conversion unit, a temperature sensor unit, a temperature signal conditioning unit, a coprocessing CPU (Central Processing Unit) unit, an RS-485 communication unit and an industrial control computer, wherein the local discharging sensor unit is composed of three local discharging sensors; the primary side of the three-phase voltage transformer is connected with a three-phase high-voltage power grid; the secondary side of the three-phase voltage transformer is connected into the trigger signal generation unit; and the industrial control computer has the main frequency of 3GHz, a memory of 4G and a hard disk of 500G.

Description

technical field [0001] The invention relates to the field of on-line monitoring and fault diagnosis of a mine main ventilator, in particular to a high-voltage motor insulation state monitoring device for a mine main ventilator. technical background [0002] Mine main ventilator is one of the key equipment in mine production. It shoulders the important task of diluting gas concentration, taking away harmful dust, and providing fresh air to underground personnel. If it fails, it will endanger mine production safety and workers' lives. It will bring immeasurable losses to coal mines and cause bad social impact. The electric motor for mine main ventilator is the most complicated part of mine main ventilator. If the motor insulation problem cannot be found in time, it will be a major safety hazard in coal mine production. Therefore, on-line monitoring of the insulation status of high-voltage motors used in mine main ventilators and early warning of potential insulation failures ...

AI Technical Summary

Problems solved by technology

The electric motor for the mine main ventilator is the most complicated part of the mine main ventilator. If the motor insulation problem cannot be found in time, it will be a major safety hazard in coal mine production

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