Non-intrusive incipient failure detection method of asynchronous motor rotor
A technology of an asynchronous motor and a detection method, which is applied in the detection field and can solve the problems of increasing the interference of the mechanical fault of the sensor and the like
Inactive Publication Date: 2019-12-06
CHINA UNIV OF MINING & TECH
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Problems solved by technology
The vibration signal detection method is another effective method, but this method not only needs to add additional sensors but is also easily disturbed by other mechanical failures
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[0020] The specific embodiment of the present invention provides a non-intrusive induction motor initial failure detection method, the method is as follows:
[0021] After the signal acquisition and conditioning equipment collects the voltage / current signal of the motor, it transmits the converted standard voltage / current signal to the data acquisition card, and then transmits the signal to the computer through wireless communication. The software operating system on the computer mainly includes Real-time signal acquisition, real-time algorithm analysis, and real-time display of results. At the same time, the software platform of the detection system is released to the cloud, allowing users to perform remote detection and monitoring. The voltage and current signals in this embodiment, that is, the voltage and current signals at the input terminal of the asynchronous motor stator, can be collected using current clamps, Hall sensors, etc., so there is no need to invade the motor ho...
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The invention relates to a detection method capable of monitoring an incipient failure of an asynchronous motor rotor in an on-line way by a non-intrusive mode, and belongs to the technical field of detection. In order to achieve effective detection of the incipient failure of the asynchronous motor rotor and improve the safety, the reliability and the operation and maintenance efficiency of a motor system, the invention discloses a non-intrusive incipient failure detection method of the asynchronous motor rotor. According to the method, a motor stator voltage / current is used as an informationsource of failure detection, the information source is sent to an upper computer software operation system taking Labvie as a core for analysis after acquisition of a data acquisition card, and the functions o real-time acquisition of a voltage / current signal, failure detection and identification, remote and on-line monitoring and the like can be achieved. By the method, the problem of a traditional rotor fault detection method is solved, and meanwhile, a failure detection technology is also pushed to be developed in an intelligent detection direction with real-time, on-lime and remote-movingway.
Description
Technical field [0001] The invention relates to a non-intrusive detection method capable of on-line monitoring of the initial failure of an asynchronous motor rotor, and belongs to the technical field of detection. Background technique [0002] After an asynchronous motor has a rotor failure, it not only produces a deviation in the mechanical structure, but also transmits the fault information to the air gap flux, stator current, electromagnetic torque, and speed signals through electromagnetic coupling. Furthermore, a variety of fault detection methods have been produced, such as electromagnetic torque detection method, stator residual voltage detection method, speed detection method, vibration detection method, air gap flux detection method, stator voltage / current detection method, etc. Among them, the electromagnetic torque / speed detection method requires the installation of expensive torque / speed sensors, which not only increases the cost and complexity of the system, but als...
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Login to View More IPC IPC(8): G01R31/34
CPCG01R31/343G01R31/346
Inventor 史丽萍许浩高志宇童志刚祁晓雨王攀攀
Owner CHINA UNIV OF MINING & TECH