Variable frequency motor fault monitoring system

A variable frequency motor and fault monitoring technology, which is applied in the direction of motor generator testing, measuring electricity, measuring devices, etc., can solve the problems of false alarms of variable frequency motor faults, and achieve the effects of reducing false positives, improving accuracy, and reasonable alarm mechanism

Pending Publication Date: 2021-06-11
郑州恩普特科技股份有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a variable frequency motor fault monitoring system, which is used to solve the problem that the prior art monitoring variable frequency motor is prone to fault false alarms

Method used

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  • Variable frequency motor fault monitoring system

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Embodiment Construction

[0021] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0022] A kind of frequency conversion motor fault monitoring system of the present invention, the composition of this system is as follows figure 1 As shown, it includes edge-side data acquisition module, edge-side feature extraction module, remote data reading and parameter delivery module and monitoring system. Among them, the edge-side data acquisition module is used for synchronous acquisition of the current signal, vibration signal and temperature signal of the variable frequency motor.

[0023] In this embodiment, the hardware configuration of an edge-side data acquisition module mainly includes a vibration sensor, a current sensor, a temperature sensor, and an edge intelligent collector. The collector synchronously collects vibration signals, temperature signals, and three-phase Dynamic current signal.

[0024] The specific location...

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Abstract

The invention relates to a variable frequency motor fault monitoring system, and belongs to the field of fault diagnosis. According to the system, an electrical fault characteristic index, a vibration fault characteristic index and a temperature fault characteristic index of a motor are correspondingly calculated by collecting a dynamic current signal, a bearing vibration signal and a bearing temperature signal of motor equipment; and the vibration fault characteristic index and the temperature fault characteristic index are respectively substituted into a dynamically configured alarm threshold model function, a vibration alarm threshold and a temperature alarm threshold are solved, and an electrical alarm threshold is set by adopting the national standard and is used for early warning judgment. According to the invention, various types of signals of the variable frequency motor are utilized to carry out fault characteristic index discrimination, and a national standard threshold value is adopted to carry out alarm judgment on the electrical fault characteristic index; and for the vibration and temperature fault characteristic indexes, the threshold value calculated by the alarm threshold value model function is adopted to carry out alarm judgment, so that the alarm accuracy of equipment is improved, and the rate of missing alarm and false alarm is reduced.

Description

technical field [0001] The invention belongs to the field of equipment state monitoring and fault diagnosis, and in particular relates to a fault monitoring system for a variable frequency motor. Background technique [0002] In the prior art, frequency conversion motors are more and more widely used, and it is of great significance to ensure the safe and efficient operation of equipment, reduce unplanned downtime, and improve the operating rate of equipment and safe production. Traditional motor equipment status monitoring has a single monitoring index. In the case of variable speed, the alarm threshold of the monitoring index is fixed and the setting is unreasonable, resulting in inaccurate alarms and false alarms. Contents of the invention [0003] The purpose of the present invention is to provide a variable frequency motor fault monitoring system, which is used to solve the problem that the prior art monitoring variable frequency motor is prone to fault false alarms. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/34
CPCG01R31/343
Inventor 胡鑫陈磊李永耀雷文平王宏超李凌均王丽雅韩捷
Owner 郑州恩普特科技股份有限公司
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