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A frequency conversion motor insulation automatic detection system

A frequency conversion motor, automatic detection technology, applied in the direction of motor generator testing, dielectric strength testing, etc., can solve the problems of motor insulation changes, difficult to find, etc., to avoid accidents, wide range of applications, and improve the effect of technical management.

Active Publication Date: 2018-03-13
BEIJING SHOUGANG INT ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an automatic detection system for the insulation of variable frequency motors, which solves the problem that it is difficult to detect when the insulation of the motor changes

Method used

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  • A frequency conversion motor insulation automatic detection system
  • A frequency conversion motor insulation automatic detection system

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Experimental program
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Effect test

Embodiment 1

[0032] Set the motor to be detected on the screen of the PLC control and data acquisition system and the database 6, through the insulation detection manual automatic transfer switch 3, the main circuit operation and insulation detection switching safety contactor 4 of the frequency conversion motor, and the motor insulation detection working contactor 5. The conduction of the motor insulation detection circuit, the motor to be detected is detected by the motor leakage current signal acquisition device 1, and the detected signal is converted into an analog signal that can be uploaded by the measurement signal transmitter 2, and uploaded to the PLC control and The data acquisition system and the database 6 judge the acquisition signals through the PLC control and the data acquisition system and the database 6 . When the motor insulation detection value is normal, the PLC control and data acquisition system and the database 6 send a motor normal signal to the PLC system of the pr...

Embodiment 2

[0034]Set the motor to be detected on the screen of the PLC control and data acquisition system and the database 6, through the insulation detection manual automatic transfer switch 3, the main circuit operation and insulation detection switching safety contactor 4 of the frequency conversion motor, and the motor insulation detection working contactor 5. The conduction of the motor insulation detection circuit, the motor to be detected is detected by the motor leakage current signal acquisition device 1, and the detected signal is converted into an analog signal that can be uploaded by the measurement signal transmitter 2, and uploaded to the PLC control and The data acquisition system and the database 6 judge the acquisition signals through the PLC control and the data acquisition system and the database 6 . If there is a problem with the insulation of the motor, the PLC control and data acquisition system and the screen of the database 6 will send out an audible and visual al...

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Abstract

The invention relates to an automatic detection system for frequency conversion motor insulation, which belongs to the field of electric control. Motor leakage current signal acquisition device, measurement signal transmitter, insulation detection manual automatic transfer switch, frequency conversion motor main circuit operation and insulation detection switching safety contactor, motor insulation detection working contactor are all installed in the on-site motor control cabinet. When it is necessary to automatically detect the insulation resistance of the motor, the automatic switch of the insulation detection hand is switched to the automatic state, and the circuit breaker QF of the group stick motor is closed; when the detection data alarms, the automatic switch of the insulation detection hand is switched to the manual state, one by one Close the circuit breaker QF of the single motor circuit. The advantage is that it will not have any impact on the normal function of the original production line, which can reduce equipment overhaul and maintenance time, and reduce production loss caused by motor insulation accidents.

Description

technical field [0001] The invention belongs to the technical field of electrical control, and in particular relates to an automatic insulation detection system of a variable frequency motor. It is suitable for motor insulation detection of various voltage levels and different capacities. It can make statistics on the insulation of the motor, find the change rule of the motor insulation according to the statistical data of the motor insulation, and do a good job of maintenance and inspection of the motor with gradually reduced insulation, reducing the normal production of the production line. In the process, due to the sudden damage of the motor insulation, the parking accident rate is avoided, and the huge loss to the production caused by this is avoided. Background technique [0002] In the metallurgical industry, especially the hot rolling production line, there are many auxiliary drive motors. Taking hot rolling as an example, there are more than 790 auxiliary drive mot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/12G01R31/34
Inventor 吕冬梅刘燕王凤阁张玉杰刘克清周军刘自春
Owner BEIJING SHOUGANG INT ENG TECH
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