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Motor state detection, analysis and early warning method and equipment
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A state detection and state analysis technology, used in motor generator testing, mechanical component testing, machine/structural component testing, etc.
Pending Publication Date: 2022-02-25
MAINTENANCE BRANCH OF STATE GRID FUJIAN ELECTRIC POWER
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Abstract
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Problems solved by technology
This solution is mainly aimed at specific units, and is not suitable for diagnosing motors of various types and working conditions
Method used
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Embodiment 1
[0045] refer to figure 1 , a motor state detection analysis early warning method, comprising the following steps:
[0046] Corresponding sensors are installed at specific positions of the motor to be detected, and the sensors include at least vibration sensors, noise sensors, voltage sensors, current sensors and temperature sensors; the collected parameters can be increased by increasing the type or number of sensors.
[0047] Each state quantity of the motor to be detected at the current moment is collected by each of the sensors, and the state quantity at least includes vibration acceleration, vibration frequency, noise, voltage, current and temperature, and is filtered and denoised; the purpose of filtering and denoising is to filter out Noise or artifacts in the signal, improving the signal-to-noise ratio, smoothing analytical data, always interfering with the signal, and sharing frequency components. In this embodiment, filtering is performed through a band-pass filter. ...
Embodiment 2
[0057] A motor state detection analysis early warning method, on the basis of Embodiment 1, the motor state analysis model is:
[0058]
[0059] Among them, B(t) is the comprehensive state quantity of the motor at time t, Δ i (t) is the deviation value of the i-th state quantity at time t, g i is the weight of the i-th state quantity, determined through field experiments. The model analyzes the motor to be detected from multiple dimensions, and the accuracy of the model analysis can be improved by increasing the state quantity.
Embodiment 3
[0061] A motor state detection analysis early warning method, on the basis of the second embodiment, the vibration frequency of the motor to be detected is obtained through the vibration sensor, and the vibration acceleration of the motor to be detected is obtained through the vibration frequency at each moment; time t 1 When the vibration acceleration sum is the deviation value of the vibration frequency Δ 1 (t 1 ),Δ 2 (t 1 ) are:
[0062] Δ 1 (t 1 ) = a(t 1 )-e 1 (t 1 )a(t 0 );
[0063] Δ 2 (t 1 ) = f(t 1 )-e 2 (t 1 )f(t 0 );
[0064] Among them, a(t 1 ) and f(t 1 ) are time t 1 When the vibration acceleration and vibration frequency of the motor to be detected, a(t 0 ) and f(t 0 ) are time t 0 When the vibration acceleration and vibration frequency of the motor to be detected, e 1 (t 1 ) and e 2 (t 1 ) are time t 1 The vibration acceleration deviation coefficient and the vibration frequency deviation coefficient of the motor to be detected at time...
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Abstract
The invention relates to a motor state detection, analysis and early warning method and equipment, and the method comprises the following steps: installing corresponding sensors at a specific position of a to-be-detected motor, the sensors at least comprising a vibration sensor, a noise sensor, a voltage sensor, a current sensor and a temperature sensor; collecting each state quantity of the motor to be detected at the current moment through each sensor, and filtering and denoising; establishing a motor state analysis model; and performing comprehensive analysis through the motor state analysis model and each state quantity of the to-be-detected motor to obtain the motor state quantity of the to-be-detected motor at the current moment. The equipment detects the state of the motor through the method. According to the method, the state of the motor to be detected is analyzed from multiple dimensions through the motor state analysis model, and the motor state quantity of the motor at the current moment is obtained. According to the invention, by pre-storing the standard state quantity of each type of motor, the state quantity of the motor is compared with the standard state quantity, so that the current working condition of the motor is obtained.
Description
technical field [0001] The invention relates to a motor state detection, analysis and early warning method and equipment, belonging to the technical field of motor state detection. Background technique [0002] The converter station uses a large number of rotating equipment, such as the main circulation pump, spray pump, water supply pump motor in the valve cooling system, and the combined internal fan motor of the HVACsystem. Motor failure will lead to valve cooling or HVACsystem shutdown, endangering the safe and stable operation of the DC system. At present, the inspection of motors in the station is limited to infraredtemperature measurement, and the inspection method is single and the cycle is long (infraredtemperature measurement for valve cooling once a week, and infraredtemperature measurement for HVAC once a month). About 60-70% of motor faults can be reflected through vibration and noise. It is necessary to detect the state quantities such as motor vibration ...
Claims
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Application Information
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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/34G01K13/04G01H17/00G01M13/00
CPCG01R31/343G01K13/04G01H17/00G01M13/00
Inventor 范彦琨何志甘黄东方张锦吉姚国华王则祥林剑平张颜真付胜宪陈德兴徐显烨李升晖
Owner MAINTENANCE BRANCH OF STATE GRID FUJIAN ELECTRIC POWER
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