Motor monitoring system
A technology of motor monitoring and motor under test, applied in the direction of motor generator testing, measuring electricity, measuring devices, etc., can solve problems such as inability to monitor, and achieve the effect of making up for the inability to effectively detect electrical faults of motors
Active Publication Date: 2020-06-16
深圳前海慧联科技发展有限公司
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Problems solved by technology
Motor faults are usually divided into mechanical faults and electrical faults. By monitoring the vibration method, only the mechanical faults of the motor can be monitored, accounting for about 53% of all motor faults, and up to 47% of the faults are electrical faults, which cannot be detected by vibration. effective monitoring
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[0050] The terms "first", "second" and the like in the description, embodiments, claims, and drawings of the present invention are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, of a sequence of steps or elements. A method, system, product or device is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to the process, method, product or device.
[0051] The invention discloses a motor monitoring method and device. Through a magnetic flux acquisition sensor installed on the surface of the motor casing, real-time signal data under two working conditions of the motor when the motor is stopped and running is obtained, and the magnetic flux signal is collected by the data acquisition ...
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The invention relates to a motor monitoring system, and the system comprises a sensor unit which is used for collecting the magnetic flux of the surface of a motor in an operation state and a shutdownstate, and requires to collect the magnetic flux data of at least one measuring point of the motor; a data acquisition unit which is used for acquiring and processing the data of the sensor unit andcalculating the characteristic value of the motor, wherein the data acquisition unit comprises a data acquisition module, an analog low-pass filtering module, an analog-to-digital conversion module, asignal processing and algorithm module, a data transmission module and a power consumption management module; and an on-line monitoring unit which is used for receiving the characteristic value transmitted by the data acquisition unit, calculating a deviation value of the magnetic flux data and sending alarm information when the deviation value is greater than a preset threshold, wherein the on-line monitoring unit comprises a data analysis and processing module, a data storage module, an alarm processing module and a data display module. The motor is monitored by monitoring the change of themagnetic flux of the motor shell, and the defect that the electrical fault of the motor cannot be effectively detected is overcome.
Description
technical field [0001] The invention relates to the field of on-line state monitoring of rotating machinery, in particular to a motor monitoring system. Background technique [0002] Motors are widely used in the industrial industry, and are used in all walks of life, especially in the industrial field. They are indispensable production equipment. More and more, the structure is more and more complex, and its maintenance is more and more difficult. [0003] For a long time, for various operating faults of the motor, mature and reliable relay protection measures have been mainly adopted, such as overvoltage protection, overcurrent protection, undervoltage protection, differential protection, reverse current protection, grounding protection and so on. These protective measures are only actions taken after the accident, and cannot prevent the occurrence of the accident. When these protective measures are taken, economic losses may still be caused. [0004] At present, most of...
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IPC IPC(8): G01R31/34
CPCG01R31/343
Inventor 马少立李桂民
Owner 深圳前海慧联科技发展有限公司