CN111896871A - Motor operation fault analysis system - Google Patents
Motor operation fault analysis system Download PDFInfo
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- CN111896871A CN111896871A CN202011009681.XA CN202011009681A CN111896871A CN 111896871 A CN111896871 A CN 111896871A CN 202011009681 A CN202011009681 A CN 202011009681A CN 111896871 A CN111896871 A CN 111896871A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- General Physics & Mathematics (AREA)
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The invention provides a motor operation fault analysis system which comprises a temperature sensor, a voltage sensor, a vibration sensor, a first conditioning circuit, a second conditioning circuit, a third conditioning circuit, an alarm device, a centralized control module, a display device, a storage device, a communication device and a power supply device, wherein the temperature sensor is used for testing the shell temperature of a motor to be tested, the temperature signal of a motor rotor can be obtained by combining the corresponding signal curve of the temperature of the motor rotor to be tested and the shell temperature of the motor to be tested, the vibration sensor is used for testing the vibration signal of the motor to be tested, the voltage sensor is used for testing the output voltage of the motor to be tested, and then the fault of the motor is effectively diagnosed according to the temperature of the motor rotor, the shell vibration and the working voltage.
Description
Technical Field
The invention relates to the field of intelligent testing, in particular to a motor operation fault analysis system.
Background
The motor fault diagnosis is scaled in industrial production and already exists since the motor is put into application in a large scale, but due to the limitation of the technological level, the fault diagnosis mainly depends on experienced experts or maintenance personnel to make subjective judgments from the aspects of motor temperature, sound, vibration and the like by means of personal experience and simple instruments.
The motor is used as the largest electric dragging equipment in modern industrial production, various motor faults are often generated under the influence of a plurality of factors in the actual operation process, the motor can be damaged, the serious losses of production halt, waste products and the like can be caused, and therefore severe social influence and huge economic loss are caused.
In order to diagnose motor faults, it is essential to analyze various fault mechanisms of the motor, and it is particularly important to know the causes and influences of the faults of the motor, and the motor fault mechanisms are preconditions for state monitoring and fault diagnosis. The motor fault diagnosis process is a process from signal detection to signal identification, and the state characteristics of various faults can be determined only by analyzing the fault mechanisms of the motor, so that a reasonable diagnosis method is selected, and whether the fault occurs or not is judged.
In the prior art, a motor fault can be detected through a vibration signal, and is also in certain relation with a current signal of the motor, a bearing fault affects air gap magnetic flux density so as to affect induced current frequency characteristics, and the fact that the bearing fault can be detected through stator current frequency analysis to diagnose the motor fault is proved through practice, frequency spectrum analysis is carried out on motor stator current through Fourier transform, and online fault diagnosis of the motor fault is realized.
However, in the prior art, when testing, the supply current of the motor to be tested cannot be guaranteed to be stable (i.e. high accuracy), and the casing of the motor to be tested needs to be opened for testing, and an effective model cannot be established in advance to realize parameter testing outside the motor so as to effectively monitor the motor rotor and the like.
Disclosure of Invention
Therefore, in order to overcome the above problems, the present invention provides a motor operation failure analysis system, which includes a temperature sensor, a voltage sensor, a vibration sensor, a first conditioning circuit, a second conditioning circuit, a third conditioning circuit, an alarm device, a centralized control module, a display device, a storage device, a communication device, and a power supply device, wherein the temperature sensor is used to test the housing temperature of the motor to be tested, the temperature signal of the motor rotor can be obtained by combining the corresponding signal curve of the temperature of the motor rotor to be tested and the housing temperature of the motor to be tested, the vibration sensor is used to test the vibration signal of the motor to be tested, the voltage sensor is used to test the output voltage of the motor to be tested, and then the failure of the motor is effectively diagnosed according to the temperature of the motor rotor, the housing vibration, and the working voltage.
Preferably, the motor operation fault analysis system comprises a temperature sensor, a voltage sensor, a vibration sensor, a first conditioning circuit, a second conditioning circuit, a third conditioning circuit, an alarm device, a centralized control module, a display device, a storage device, a communication device and a power supply device.
The output end of the temperature sensor is connected with the input end of the first conditioning circuit, the output end of the voltage sensor is connected with the input end of the second conditioning circuit, the output end of the vibration sensor is connected with the input end of the third conditioning circuit, the output end of the first conditioning circuit, the output end of the second conditioning circuit and the output end of the third conditioning circuit are all connected with the input end of the centralized control module, and the alarm device, the display device, the storage device, the communication device and the power supply device are all connected with the centralized control module.
Wherein, the motor operation failure analysis system further comprises a DC stabilized power supply and a power supply conversion circuit, the DC stabilized power supply is connected with the power supply conversion circuit, the power supply conversion circuit is connected with the motor to be tested, when the motor to be tested is tested, the current conversion circuit provides power supply for the motor to be tested, the temperature sensor is arranged on a motor shell to be tested and is used for monitoring a temperature signal of the motor shell to be tested, the temperature sensor transmits the acquired temperature signal to the first conditioning circuit, the first conditioning circuit transmits the received temperature signal to the centralized control module after signal processing, a corresponding signal curve of the rotor temperature of the motor to be tested and the shell temperature of the motor to be tested is stored in the centralized control module, and the centralized control module calculates the rotor temperature of the motor to be tested according to the curve, the centralized control module transmits the temperature signal obtained by calculation to the display device for display, the centralized control module transmits the temperature signal obtained by calculation to the storage device for storage, a temperature threshold value is also stored in the centralized control module, and if the temperature signal obtained by calculation of the centralized control module is greater than the temperature threshold value, the centralized control module controls the alarm device to send alarm information; the vibration sensor is arranged on the shell of the motor to be detected and is used for monitoring the vibration signal of the shell of the motor to be detected, the vibration sensor transmits the acquired vibration signal to the second conditioning circuit, the second conditioning circuit processes the received vibration signal and transmits the processed vibration signal to the centralized control module, the centralized control module transmits the received vibration signal to the display device for displaying, the centralized control module transmits the received vibration signal to the storage device for storage, the centralized control module extracts a characteristic value from the received vibration signal, a threshold value corresponding to the characteristic value is stored in the centralized control module, and if the vibration signal calculated by the centralized control module is greater than the threshold value corresponding to the characteristic value, the centralized control module controls the alarm device to send alarm information; the voltage sensor is arranged at the electric signal output end of the motor to be detected, the voltage sensor is used for monitoring a voltage signal at the electric signal output end of the motor to be detected, the voltage sensor transmits the acquired voltage signal to the third conditioning circuit, the third conditioning circuit performs signal processing on the received voltage signal and transmits the processed voltage signal to the centralized control module, the centralized control module transmits the received voltage signal to the display device for display, the centralized control module transmits the received voltage signal to the storage device for storage, a voltage threshold value is stored in the centralized control module, and if the voltage signal calculated by the centralized control module is greater than the voltage threshold value, the centralized control module controls the alarm device to send alarm information; the power supply device provides power support for the centralized control module.
Preferably, the motor operation fault analysis system further includes a synchronization module, a first temperature test module, a second temperature test module, and a data analysis module.
The synchronous module is connected with the first temperature testing module and the second temperature testing module, the first temperature testing module and the second temperature testing module are both connected with the data analysis module, and the data analysis module is connected with the centralized control module through the communication device.
Before the motor that awaits measuring tests, right the motor that awaits measuring applys power supply signal, first temperature test module set up in on the casing of the motor that awaits measuring, first temperature test module is used for the test the temperature signal of motor housing that awaits measuring, second temperature test module set up in on the motor rotor that awaits measuring, second temperature test module is used for the test motor rotor's temperature signal, synchronization module to first temperature test module with second temperature test module sends synchronizing signal, makes first temperature test module with second temperature test module's sampling initial point, sampling period unanimous, first temperature test module with the temperature signal transmission that second temperature test module will gather extremely data analysis module, data analysis module is according to receiving first temperature test module's temperature signal with second temperature test module's temperature signal draws institute And the corresponding signal curve of the temperature of the rotor of the motor to be tested and the temperature of the shell of the motor to be tested is transmitted to the centralized control module through the communication device.
Preferably, the power conversion circuit includes an operational amplifier (a 1), a diode (D1), a first resistor (R1), a second resistor (R2), a third resistor (R3), a fourth resistor (R4), a fifth resistor (R5), and a field-effect transistor (T1).
Wherein an output terminal of the regulated DC power supply is connected to an inverting input terminal of the operational amplifier (A1), a non-inverting input terminal of the operational amplifier (A1) is grounded, one terminal of the first resistor (R1) is connected to an inverting input terminal of the operational amplifier (A1), the other terminal of the first resistor (R1) is connected to an output terminal of the operational amplifier (A1), an anode of the diode (D1) is connected to one terminal of the first resistor (R1), a cathode of the diode (D1) is connected to the other terminal of the first resistor (R1), one terminal of the third resistor (R3) is connected to an output terminal of the operational amplifier (A1), the other terminal of the third resistor (R3) is connected to a gate of the field effect transistor (T1), a source of the field effect transistor (T1) is grounded, a drain of the field effect transistor (T1) is connected to one terminal of the fifth resistor (R5), the other end of fifth resistance (R5) with the one end of fourth resistance (R4) is connected, the one end of second resistance (R2) with the one end of third resistance (R3) is connected, the other end of second resistance (R2) is connected with power Vcc, the one end of fourth resistance (R4) with the inverting input of operational amplifier (A1) is connected, the other end of fourth resistance (R4) with the feed end of the motor that awaits measuring is connected.
Preferably, the centralized control module extracts a characteristic value from the received vibration signal, and the specific steps are as follows:
step 1: the centralized control module receives a vibration signal y (k), wherein k is a sampling point, k =1,2,3,4 … W, then,
step 2: the result is filtered, and then,
where M is the number of filtering passes, where the filter function b (i) is:
and step 3: performing function processing to obtain result s1(k) Then, there is,
wherein the content of the first and second substances,
is a window function;
and 4, step 4: and extracting a peak value or a frequency parameter from the result as a characteristic value.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention provides a motor operation fault analysis system which comprises a temperature sensor, a voltage sensor, a vibration sensor, a first conditioning circuit, a second conditioning circuit, a third conditioning circuit, an alarm device, a centralized control module, a display device, a storage device, a communication device and a power supply device, wherein the temperature sensor is used for testing the shell temperature of a motor to be tested, the temperature signal of a motor rotor can be obtained by combining the corresponding signal curve of the temperature of the motor rotor to be tested and the shell temperature of the motor to be tested, the vibration sensor is used for testing the vibration signal of the motor to be tested, the voltage sensor is used for testing the output voltage of the motor to be tested, and the fault of the motor is effectively diagnosed according to the temperature of the motor rotor, the shell vibration and the working voltage.
(2) Before testing the motor to be tested, the corresponding signal curve of the temperature of the rotor of the motor to be tested and the temperature of the shell of the motor to be tested is drawn by using the first temperature testing module and the second temperature testing module, and is transmitted to the centralized control module through the communication device, so that the motor to be tested does not need to be disassembled and assembled when the motor to be tested is formally tested, the temperature sensor is arranged on the rotor of the motor to obtain the temperature of the rotor of the motor, and the drawn corresponding signal curve of the temperature of the rotor of the motor to be tested and the temperature of the shell of the motor to be tested can be used when the motor to be tested of the same type is tested at a later stage.
(3) The invention also provides a motor operation fault analysis system, which is characterized in that the power supply conversion circuit provided by the invention can effectively eliminate spike signals caused by voltage mutation, and further can avoid damage of a motor to be tested caused by receiving overvoltage signals during testing, wherein the damage is caused by testing hardware.
Drawings
FIG. 1 is a schematic diagram of a motor operation fault analysis system of the present invention;
FIG. 2 is a schematic diagram of the corresponding signal curve of the temperature of the motor rotor to be measured and the temperature of the motor casing to be measured according to the present invention;
FIG. 3 is a schematic diagram of the voltage supply of the motor under test according to the present invention;
fig. 4 is a circuit diagram of the power conversion circuit of the present invention.
Detailed Description
The following describes the motor operation failure analysis system provided by the present invention in detail with reference to the accompanying drawings and embodiments.
As shown in fig. 1 and 3, the motor operation fault analysis system provided by the present invention includes a temperature sensor, a voltage sensor, a vibration sensor, a first conditioning circuit, a second conditioning circuit, a third conditioning circuit, an alarm device, a centralized control module, a display device, a storage device, a communication device, and a power supply device.
The output end of the temperature sensor is connected with the input end of the first conditioning circuit, the output end of the voltage sensor is connected with the input end of the second conditioning circuit, the output end of the vibration sensor is connected with the input end of the third conditioning circuit, the output end of the first conditioning circuit, the output end of the second conditioning circuit and the output end of the third conditioning circuit are all connected with the input end of the centralized control module, and the alarm device, the display device, the storage device, the communication device and the power supply device are all connected with the centralized control module.
Wherein, the motor operation failure analysis system further comprises a DC stabilized power supply and a power supply conversion circuit, the DC stabilized power supply is connected with the power supply conversion circuit, the power supply conversion circuit is connected with the motor to be tested, when the motor to be tested is tested, the current conversion circuit provides power supply for the motor to be tested, the temperature sensor is arranged on a motor shell to be tested and is used for monitoring a temperature signal of the motor shell to be tested, the temperature sensor transmits the acquired temperature signal to the first conditioning circuit, the first conditioning circuit transmits the received temperature signal to the centralized control module after signal processing, a corresponding signal curve of the rotor temperature of the motor to be tested and the shell temperature of the motor to be tested is stored in the centralized control module, and the centralized control module calculates the rotor temperature of the motor to be tested according to the curve, the centralized control module transmits the temperature signal obtained by calculation to the display device for display, the centralized control module transmits the temperature signal obtained by calculation to the storage device for storage, a temperature threshold value is also stored in the centralized control module, and if the temperature signal obtained by calculation of the centralized control module is greater than the temperature threshold value, the centralized control module controls the alarm device to send alarm information; the vibration sensor is arranged on the shell of the motor to be detected and is used for monitoring the vibration signal of the shell of the motor to be detected, the vibration sensor transmits the acquired vibration signal to the second conditioning circuit, the second conditioning circuit processes the received vibration signal and transmits the processed vibration signal to the centralized control module, the centralized control module transmits the received vibration signal to the display device for displaying, the centralized control module transmits the received vibration signal to the storage device for storage, the centralized control module extracts a characteristic value from the received vibration signal, a threshold value corresponding to the characteristic value is stored in the centralized control module, and if the vibration signal calculated by the centralized control module is greater than the threshold value corresponding to the characteristic value, the centralized control module controls the alarm device to send alarm information; the voltage sensor is arranged at the electric signal output end of the motor to be detected, the voltage sensor is used for monitoring a voltage signal at the electric signal output end of the motor to be detected, the voltage sensor transmits the acquired voltage signal to the third conditioning circuit, the third conditioning circuit performs signal processing on the received voltage signal and transmits the processed voltage signal to the centralized control module, the centralized control module transmits the received voltage signal to the display device for display, the centralized control module transmits the received voltage signal to the storage device for storage, a voltage threshold value is stored in the centralized control module, and if the voltage signal calculated by the centralized control module is greater than the voltage threshold value, the centralized control module controls the alarm device to send alarm information; the power supply device provides power support for the centralized control module.
In the foregoing embodiment, the system for analyzing an operation fault of a motor provided by the invention comprises a temperature sensor, a voltage sensor, a vibration sensor, a first conditioning circuit, a second conditioning circuit, a third conditioning circuit, an alarm device, a centralized control module, a display device, a storage device, a communication device and a power supply device, wherein the temperature sensor is used for testing the temperature of a shell of the motor to be tested, the temperature sensor is used for testing the temperature signal of the motor rotor in combination with a corresponding signal curve of the temperature of the motor rotor to be tested and the temperature of the shell of the motor to be tested, the vibration sensor is used for testing the vibration signal of the motor to be tested, the voltage sensor is used for testing the output voltage of the motor to be tested, and then the fault of the motor is effectively diagnosed according to the temperature of the motor rotor.
Furthermore, the centralized control module comprises a main control chip STM32F417 which is internally provided with a digital signal processing instruction set, so that the centralized control module not only can complete the function of measuring the motor operating parameters, but also can complete the analysis and processing of the measured data.
Furthermore, the storage device is a flash memory, and is used for storing a large amount of collected motor operation data.
Furthermore, since the vibration sensor detects mechanical vibration generated during the operation of the motor, the corresponding detection bandwidth is narrow, and the requirement on the bandwidth is not high when the vibration sensor is selected, so that the measurement of the vibration of the motor is completed by the three-axis acceleration sensor.
Further, the temperature sensor is a contact temperature measurement chip.
Furthermore, the first conditioning circuit performs high-pass filtering processing on the received temperature signal.
Furthermore, the second conditioning circuit performs low-pass filtering processing on the received voltage signal.
Furthermore, the third conditioning circuit performs amplification processing with a preset amplification factor on the received vibration signal.
As shown in fig. 2, the motor operation fault analysis system further includes a synchronization module, a first temperature test module, a second temperature test module, and a data analysis module.
The synchronous module is connected with the first temperature testing module and the second temperature testing module, the first temperature testing module and the second temperature testing module are both connected with the data analysis module, and the data analysis module is connected with the centralized control module through the communication device.
Before the motor that awaits measuring tests, right the motor that awaits measuring applys power supply signal, first temperature test module set up in on the casing of the motor that awaits measuring, first temperature test module is used for the test the temperature signal of motor housing that awaits measuring, second temperature test module set up in on the motor rotor that awaits measuring, second temperature test module is used for the test motor rotor's temperature signal, synchronization module to first temperature test module with second temperature test module sends synchronizing signal, makes first temperature test module with second temperature test module's sampling initial point, sampling period unanimous, first temperature test module with the temperature signal transmission that second temperature test module will gather extremely data analysis module, data analysis module is according to receiving first temperature test module's temperature signal with second temperature test module's temperature signal draws institute And the corresponding signal curve of the temperature of the rotor of the motor to be tested and the temperature of the shell of the motor to be tested is transmitted to the centralized control module through the communication device.
In the above embodiment, before testing the motor that awaits measuring, use first temperature test module and second temperature test module to draw the electric motor rotor temperature that awaits measuring with the corresponding signal curve of the electric motor shell temperature that awaits measuring, and pass through above-mentioned curve communication device transmits extremely centralized control module can need not to treat the electric motor that awaits measuring again and carry out the dismouting when formally treating the electric motor that awaits measuring and testing from this to and set up temperature sensor on electric motor rotor in order to learn electric motor rotor temperature, and when testing the electric motor that awaits measuring of same type in the later stage, all can use the drawing the electric motor rotor temperature that awaits measuring with the corresponding signal curve of the electric motor shell temperature that awaits measuring.
As shown in fig. 4, the power conversion circuit includes an operational amplifier (a 1), a diode (D1), a first resistor (R1), a second resistor (R2), a third resistor (R3), a fourth resistor (R4), a fifth resistor (R5), and a field-effect transistor (T1).
Wherein an output terminal of the regulated DC power supply is connected to an inverting input terminal of the operational amplifier (A1), a non-inverting input terminal of the operational amplifier (A1) is grounded, one terminal of the first resistor (R1) is connected to an inverting input terminal of the operational amplifier (A1), the other terminal of the first resistor (R1) is connected to an output terminal of the operational amplifier (A1), an anode of the diode (D1) is connected to one terminal of the first resistor (R1), a cathode of the diode (D1) is connected to the other terminal of the first resistor (R1), one terminal of the third resistor (R3) is connected to an output terminal of the operational amplifier (A1), the other terminal of the third resistor (R3) is connected to a gate of the field effect transistor (T1), a source of the field effect transistor (T1) is grounded, a drain of the field effect transistor (T1) is connected to one terminal of the fifth resistor (R5), the other end of fifth resistance (R5) with the one end of fourth resistance (R4) is connected, the one end of second resistance (R2) with the one end of third resistance (R3) is connected, the other end of second resistance (R2) is connected with power Vcc, the one end of fourth resistance (R4) with the inverting input of operational amplifier (A1) is connected, the other end of fourth resistance (R4) with the feed end of the motor that awaits measuring is connected.
In the above embodiment, the power conversion circuit provided by the invention can effectively eliminate the spike signal caused by the voltage jump, and further can avoid the damage of the motor to be tested caused by receiving the overvoltage signal during the test, which is caused by the test hardware.
Specifically, the centralized control module extracts a characteristic value from the received vibration signal, and the specific steps are as follows:
step 1: the centralized control module receives a vibration signal y (k), wherein k is a sampling point, k =1,2,3,4 … W, then,
step 2: the result is filtered, and then,
where M is the number of filtering passes, where the filter function b (i) is:
and step 3: performing function processing to obtain result s1(k) Then, there is,
wherein the content of the first and second substances,
is a window function;
and 4, step 4: and extracting a peak value or a frequency parameter from the result as a characteristic value.
Furthermore, the power supply device is an adjustable direct current power supply.
Further, the communication device is a wireless communication device.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (4)
1. A motor operation fault analysis system is characterized by comprising a temperature sensor, a voltage sensor, a vibration sensor, a first conditioning circuit, a second conditioning circuit, a third conditioning circuit, an alarm device, a centralized control module, a display device, a storage device, a communication device and a power supply device;
the output end of the temperature sensor is connected with the input end of the first conditioning circuit, the output end of the voltage sensor is connected with the input end of the second conditioning circuit, the output end of the vibration sensor is connected with the input end of the third conditioning circuit, the output ends of the first conditioning circuit, the second conditioning circuit and the third conditioning circuit are all connected with the input end of the centralized control module, and the alarm device, the display device, the storage device, the communication device and the power supply device are all connected with the centralized control module;
wherein, the motor operation failure analysis system further comprises a DC stabilized power supply and a power supply conversion circuit, the DC stabilized power supply is connected with the power supply conversion circuit, the power supply conversion circuit is connected with the motor to be tested, when the motor to be tested is tested, the current conversion circuit provides power supply for the motor to be tested, the temperature sensor is arranged on a motor shell to be tested and is used for monitoring a temperature signal of the motor shell to be tested, the temperature sensor transmits the acquired temperature signal to the first conditioning circuit, the first conditioning circuit transmits the received temperature signal to the centralized control module after signal processing, a corresponding signal curve of the rotor temperature of the motor to be tested and the shell temperature of the motor to be tested is stored in the centralized control module, and the centralized control module calculates the rotor temperature of the motor to be tested according to the curve, the centralized control module transmits the temperature signal obtained by calculation to the display device for display, the centralized control module transmits the temperature signal obtained by calculation to the storage device for storage, a temperature threshold value is also stored in the centralized control module, and if the temperature signal obtained by calculation of the centralized control module is greater than the temperature threshold value, the centralized control module controls the alarm device to send alarm information; the vibration sensor is arranged on the shell of the motor to be detected and is used for monitoring the vibration signal of the shell of the motor to be detected, the vibration sensor transmits the acquired vibration signal to the second conditioning circuit, the second conditioning circuit processes the received vibration signal and transmits the processed vibration signal to the centralized control module, the centralized control module transmits the received vibration signal to the display device for displaying, the centralized control module transmits the received vibration signal to the storage device for storage, the centralized control module extracts a characteristic value from the received vibration signal, a threshold value corresponding to the characteristic value is stored in the centralized control module, and if the vibration signal calculated by the centralized control module is greater than the threshold value corresponding to the characteristic value, the centralized control module controls the alarm device to send alarm information; the voltage sensor is arranged at the electric signal output end of the motor to be detected, the voltage sensor is used for monitoring a voltage signal at the electric signal output end of the motor to be detected, the voltage sensor transmits the acquired voltage signal to the third conditioning circuit, the third conditioning circuit performs signal processing on the received voltage signal and transmits the processed voltage signal to the centralized control module, the centralized control module transmits the received voltage signal to the display device for display, the centralized control module transmits the received voltage signal to the storage device for storage, a voltage threshold value is stored in the centralized control module, and if the voltage signal calculated by the centralized control module is greater than the voltage threshold value, the centralized control module controls the alarm device to send alarm information; the power supply device provides power support for the centralized control module.
2. The motor operation fault analysis system of claim 1, further comprising a synchronization module, a first temperature test module, a second temperature test module, and a data analysis module;
the synchronous module is connected with a first temperature testing module and a second temperature testing module, the first temperature testing module and the second temperature testing module are both connected with the data analysis module, and the data analysis module is connected with the centralized control module through the communication device;
before the motor that awaits measuring tests, right the motor that awaits measuring applys power supply signal, first temperature test module set up in on the casing of the motor that awaits measuring, first temperature test module is used for the test the temperature signal of motor housing that awaits measuring, second temperature test module set up in on the motor rotor that awaits measuring, second temperature test module is used for the test motor rotor's temperature signal, synchronization module to first temperature test module with second temperature test module sends synchronizing signal, makes first temperature test module with second temperature test module's sampling initial point, sampling period unanimous, first temperature test module with the temperature signal transmission that second temperature test module will gather extremely data analysis module, data analysis module is according to receiving first temperature test module's temperature signal with second temperature test module's temperature signal draws institute And the corresponding signal curve of the temperature of the rotor of the motor to be tested and the temperature of the shell of the motor to be tested is transmitted to the centralized control module through the communication device.
3. The motor operation fault analysis system of claim 1, wherein the power conversion circuit comprises an operational amplifier (a 1), a diode (D1), a first resistor (R1), a second resistor (R2), a third resistor (R3), a fourth resistor (R4), a fifth resistor (R5), and a field effect transistor (T1);
wherein an output terminal of the regulated DC power supply is connected to an inverting input terminal of the operational amplifier (A1), a non-inverting input terminal of the operational amplifier (A1) is grounded, one terminal of the first resistor (R1) is connected to an inverting input terminal of the operational amplifier (A1), the other terminal of the first resistor (R1) is connected to an output terminal of the operational amplifier (A1), an anode of the diode (D1) is connected to one terminal of the first resistor (R1), a cathode of the diode (D1) is connected to the other terminal of the first resistor (R1), one terminal of the third resistor (R3) is connected to an output terminal of the operational amplifier (A1), the other terminal of the third resistor (R3) is connected to a gate of the field effect transistor (T1), a source of the field effect transistor (T1) is grounded, a drain of the field effect transistor (T1) is connected to one terminal of the fifth resistor (R5), the other end of fifth resistance (R5) with the one end of fourth resistance (R4) is connected, the one end of second resistance (R2) with the one end of third resistance (R3) is connected, the other end of second resistance (R2) is connected with power Vcc, the one end of fourth resistance (R4) with the inverting input of operational amplifier (A1) is connected, the other end of fourth resistance (R4) with the feed end of the motor that awaits measuring is connected.
4. The motor operation fault analysis system of claim 1, wherein the centralized control module extracts a characteristic value from the received vibration signal, and the specific steps are as follows:
step 1: the centralized control module receives a vibration signal y (k), wherein k is a sampling point, k =1,2,3,4 … W, then,
step 2: the result is filtered, and then,
where M is the number of filtering passes, where the filter function b (i) is:
and step 3: performing function processing to obtain result s1(k) Then, there is,
wherein the content of the first and second substances,
is a window function;
and 4, step 4: and extracting a peak value or a frequency parameter from the result as a characteristic value.
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|---|---|---|---|---|
| CN113485201A (en) * | 2021-07-30 | 2021-10-08 | 王丹 | New energy automobile motor health detection control system |
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2020
- 2020-09-23 CN CN202011009681.XA patent/CN111896871A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113485201A (en) * | 2021-07-30 | 2021-10-08 | 王丹 | New energy automobile motor health detection control system |
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