AC asynchronous motor state monitoring system

A state monitoring system, AC asynchronous motor technology, applied in the direction of motor generator testing, measuring electricity, measuring devices, etc., can solve problems such as unbalanced power supply, motor body asymmetry, sensor errors, etc., to improve reliability and have both Real-time, optimized supplementary effects

Pending Publication Date: 2021-06-25
SHANGHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing state monitoring systems are mostly based on a single current signal as the state parameter. However, using the current signal alone as the characteristic parameter will be affected by the inherent asymmetry of the motor body, unbalanced power supply, and sensor errors. Complex causes are often difficult to diagnose accurately

Method used

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  • AC asynchronous motor state monitoring system
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  • AC asynchronous motor state monitoring system

Examples

Experimental program
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Effect test

Embodiment 1

[0035] see Figure 1 to Figure 7, an AC asynchronous motor condition monitoring system, characterized in that it includes: a data acquisition module 1, an embedded terminal module 2 and a cloud computing and service center module 3. The data acquisition module 1 and the embedded terminal module 2 are on the device side, and the cloud computing and service center module 3 is on the cloud. Among them, the data acquisition module 1 collects key parameters of the motor and the surrounding environment, and transmits data to the embedded terminal module 2 . The embedded terminal module 2 preprocesses the obtained data, obtains the air gap flux linkage information of the motor through the method of model calculation according to the obtained data, and then extracts the fault characteristic parameters, performs edge calculation based on the physical model, and performs fast Fault diagnosis and control, and data transmission to cloud computing and service center module 3. The cloud c...

Embodiment 2

[0037] This embodiment is basically the same as Embodiment 1, and the special features are as follows:

[0038] Described data acquisition module 1 comprises: electrical information acquisition unit 11, temperature information acquisition unit 12 and vibration information acquisition unit 13, described electrical information acquisition unit 11 comprises voltage acquisition unit 111 and current acquisition unit 112, and described voltage acquisition unit 111 It is used to collect the voltage signal when the motor is running, and the current collection unit 112 is used to collect the stator current signal of the motor. The temperature information collection unit 12 is used to collect the temperature of the motor body and the temperature of the surrounding environment. The vibration information collection unit 13 is used to collect vibration signals of the motor housing. The collected data is transmitted to the embedded terminal module 2 in real time.

[0039] The embedded ter...

Embodiment 3

[0052] This embodiment is basically the same as the above-mentioned embodiment, and the special features are as follows:

[0053] Such as figure 1 and figure 2 As shown, the AC asynchronous motor condition monitoring system includes: data acquisition module 1, embedded terminal module 2 and cloud computing and service center module 3. The data acquisition module 1 and the embedded terminal module 2 are on the device side, and the cloud computing and service center module 3 is on the cloud. Among them, the data acquisition module 1 collects key parameters of the motor and the surrounding environment, and transmits data to the embedded terminal module 2 . The embedded terminal module 2 preprocesses the obtained data, obtains the stator flux information of the motor through the method of model calculation according to the obtained data, and then extracts the fault characteristic parameters, performs edge calculation based on the physical model, and quickly faults the motor Di...

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Abstract

The invention discloses an AC asynchronous motor state monitoring system, which comprises a data acquisition module, an embedded terminal module and a cloud computing and service center module. The data acquisition module acquires electrical signals, temperature signals, vibration signals and the like of the motor and the surrounding environment. The embedded terminal module is installed on a work site, collects collected data, extracts fault characteristic parameters, carries out real-time rapid fault diagnosis and control on the motor, and guarantees the safe operation of the motor. The cloud computing and service center module communicates with the embedded terminal module to obtain motor operation data, perform fault pre-diagnosis based on data driving, provide a function for a user to perform data query and send an early warning signal to a fault, and realize remote operation and maintenance and visualization. According to the AC asynchronous motor state monitoring system, an edge computing and cloud computing cooperation concept is introduced, a fault diagnosis scheme based on a physical model and data driving is comprehensively applied, accuracy, real-time performance and economical efficiency are considered, and the system is an effective way for state monitoring of an AC asynchronous motor.

Description

technical field [0001] The invention relates to the technical field of motor state monitoring, in particular to a state monitoring system for an AC asynchronous motor, which is a state monitoring system that comprehensively uses the physical model and data drive of the AC asynchronous motor. Background technique [0002] As the main power device of various electric drive equipment, AC asynchronous motor has the advantages of simple structure, convenient control, high energy efficiency, and no pollution, and is widely used in various electromechanical equipment. Due to the long-term operation of the motor, some structures and components will gradually deteriorate, which will evolve from minor faults to serious faults, and even cause serious production accidents, resulting in heavy losses of life and property. Therefore, research on how to timely detect the signal characteristics of abnormal operation or early faults of asynchronous motors, and judge what kind of faults are ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/34G01D21/02
CPCG01R31/343G01D21/02
Inventor 徐国卿张洪文
Owner SHANGHAI UNIV
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