CN112556755A - Method and device for judging fault according to motor temperature - Google Patents
Method and device for judging fault according to motor temperature Download PDFInfo
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- CN112556755A CN112556755A CN202011417752.XA CN202011417752A CN112556755A CN 112556755 A CN112556755 A CN 112556755A CN 202011417752 A CN202011417752 A CN 202011417752A CN 112556755 A CN112556755 A CN 112556755A
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Abstract
The invention provides a method and a device for judging faults according to motor temperature, comprising the following steps: s100, acquiring the running temperature of the motor; acquiring magnetic field data of a motor, and presetting a magnetic field parameter threshold; obtaining vibration data of a motor, and presetting a vibration parameter threshold; s200, presetting a maximum temperature change value, acquiring a temperature value set in a first time period, extracting the highest temperature and the lowest temperature in the first time period, and calculating the absolute value of the difference between the highest temperature and the lowest temperature to obtain a first temperature change value; comparing the first temperature change value with the maximum temperature change value to obtain a comparison result; s300, when the first temperature change value is larger than the maximum temperature change value, the magnetic field parameter and the vibration parameter are acquired in combination with the first time period, and whether at least one of the magnetic field parameter and the vibration parameter exceeds a threshold value is judged. The invention can effectively reduce the temperature misjudgment of the motor and improve the accuracy of motor fault judgment.
Description
Technical Field
The invention relates to the field of motor temperature judgment, in particular to a method and a device for judging a fault according to the motor temperature.
Background
At present, a motor serves as a key power component of a large-scale factory, service life and maintenance of the motor become an important direction of current research, particularly fault judgment of the motor is carried out, fault judgment of most motors in the prior art is still traditional, and most of the fault judgment is realized through manual timing maintenance.
In addition, the service performance and service life of the motor are influenced by overhigh temperature in the working process of the motor, so the temperature judgment also becomes a key problem of motor monitoring, particularly in some factories for iron and steel making, because a large amount of high temperature is generated during blast furnace iron making, high-temperature airflow can accompany, the temperature judgment of the motor working in the same environment can be influenced by instantaneous high-temperature airflow, the existing temperature judgment simply depends on real-time temperature data obtained by a temperature sensor to judge the motor fault, and the deep analysis of temperature change is not carried out, so the judgment method has certain defects, and the misjudgment is easy to occur, and the accuracy of the motor fault judgment is lack.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method and a device for judging a fault according to the temperature of a motor, which can effectively reduce temperature misjudgment and improve the accuracy of motor fault judgment. The technical scheme is as follows:
in one aspect, the invention provides a method for judging a fault according to the temperature of a motor, which comprises the following steps:
s100, acquiring the running temperature of the motor;
acquiring magnetic field data of a motor, and presetting a magnetic field parameter threshold;
obtaining vibration data of a motor, and presetting a vibration parameter threshold;
s200, presetting a maximum temperature change value, acquiring a temperature value set in a first time period, extracting the highest temperature and the lowest temperature in the first time period, and calculating the absolute value of the difference between the highest temperature and the lowest temperature to obtain a first temperature change value; comparing the first temperature change value with the maximum temperature change value to obtain a comparison result;
s300, when the first temperature change value is larger than the maximum temperature change value,
acquiring the magnetic field parameter and the vibration parameter in combination with the first time period, and judging whether at least one of the magnetic field parameter and the vibration parameter exceeds a threshold value;
s310, if the fault state exceeds the threshold value, judging that the motor is in a fault state, and simultaneously sending out first alarm information;
and S320, if the motor voltage does not exceed the threshold value, judging that the motor is in a normal state and is influenced by the ambient temperature.
Further, the method includes step S210, when the first temperature change value is greater than the maximum temperature change value, presetting a normal range value of the motor temperature, detecting whether the temperature of the motor is recovered to normal within a subsequent continuous equal interval time period, and if so, determining that the motor is normal; if not, executing step S300.
Further, when the first temperature variation value is greater than the maximum temperature variation value, the magnetic field parameter and the vibration parameter are acquired in combination with a first time period, and whether at least one of the magnetic field parameter and the vibration parameter exceeds a threshold value is judged, if not, the method further comprises the following steps:
s400, adjusting a time period for collecting motor temperature, magnetic field and vibration data to be set as a second time period, wherein the second time period is smaller than the first time period, acquiring a temperature value set in the second time period, extracting the highest temperature and the lowest temperature in the second time period, and calculating the absolute value of the difference between the highest temperature and the lowest temperature to obtain a second temperature change value; and comparing the second temperature change value with the maximum temperature change value.
Further, when a second temperature variation value is obtained and compared with the maximum temperature variation value, the method further comprises the following steps:
s410, when the second temperature change value is larger than the maximum temperature change value,
acquiring the magnetic field parameter and the vibration parameter in combination with the second time period, and judging whether at least one of the magnetic field parameter and the vibration parameter exceeds a threshold value;
s420, if the current value exceeds the threshold value, judging that the motor is in a fault state, and simultaneously sending out second alarm information;
and S430, if the current motor voltage does not exceed the threshold value, judging that the motor is in a normal state and is influenced by the ambient temperature.
Further, the method also comprises the following steps: and S500, obtaining a change oscillogram of the temperature data, the magnetic field data and the vibration data according to time, performing fault pre-judgment analysis according to the change trend of each parameter, and sending out early warning information.
In another aspect, the present invention further provides a device for determining a fault according to a temperature of a motor, including:
the temperature acquisition module is used for acquiring the operating temperature of the motor;
the magnetic field parameter acquisition module is used for acquiring magnetic field data of the motor and presetting a magnetic field parameter threshold;
the vibration parameter acquisition module is used for acquiring vibration data of the motor and presetting a vibration parameter threshold;
the temperature judgment and comparison module is used for presetting a maximum temperature change value, acquiring a temperature value set in a first time period, extracting the highest temperature and the lowest temperature in the first time period, and calculating the absolute value of the difference between the highest temperature and the lowest temperature to obtain a first temperature change value; comparing the first temperature change value with the maximum temperature change value to obtain a comparison result;
when the first temperature change value is larger than the maximum temperature change value, acquiring the magnetic field parameter and the vibration parameter in combination with the first time period, and judging whether at least one of the magnetic field parameter and the vibration parameter exceeds a threshold value;
if the current state exceeds the threshold value, judging that the motor is in a fault state, and simultaneously sending out first alarm information;
if the current value does not exceed the threshold value, the motor is judged to be in a normal state and is influenced by the ambient temperature.
Further, the temperature judgment and comparison module is further configured to preset a normal range value of the motor temperature when the first temperature change value is greater than the maximum temperature change value, and detect whether the temperature of the motor is restored to the normal range value within a subsequent continuous equal interval time period.
Further, still include:
the automatic adjusting module is used for adjusting a time period for collecting motor temperature, magnetic field and vibration data, setting the time period as a second time period, acquiring a temperature value set in the second time period, extracting the highest temperature and the lowest temperature in the second time period, and calculating the absolute value of the difference between the highest temperature and the lowest temperature to obtain a second temperature change value; and comparing the second temperature change value with the maximum temperature change value.
Further, still include:
the automatic adjusting module is further configured to, when the second temperature change value is greater than the maximum temperature change value, obtain the magnetic field parameter and the vibration parameter in combination with the second time period, and determine whether at least one of the magnetic field parameter and the vibration parameter exceeds a threshold value; if the current state exceeds the threshold value, judging that the motor is in a fault state, and simultaneously sending out second alarm information; if the current value does not exceed the threshold value, the motor is judged to be in a normal state and is influenced by the ambient temperature.
And the early warning judgment module is used for obtaining a change oscillogram of the temperature data, the magnetic field data and the vibration data according to time, carrying out fault early warning analysis according to the change trend of each parameter and sending out early warning information.
The invention has the beneficial effects that: respectively acquiring temperature, a magnetic field and vibration parameters when a motor runs, acquiring a temperature value set in a first time period, extracting the highest temperature and the lowest temperature in the first time period, and calculating the absolute value of the difference between the highest temperature and the lowest temperature to obtain a first temperature change value, and if the first temperature change value is greater than the maximum temperature change value, in order to avoid large temperature change caused by instantaneous high temperature of the external environment, acquiring the magnetic field parameters and the vibration parameters in the first time period and judging whether at least one of the magnetic field parameters and the vibration parameters exceeds a threshold value; if one or two of the motor state signals exceed the threshold value, the motor is judged to be in a fault state, and first alarm information is sent out at the same time; or when the first temperature change value is larger than the maximum temperature change value, detecting whether the temperature of the motor is recovered to be normal or not in the subsequent continuous equal interval time period, if so, judging that the motor is normal, and then, combining the magnetic field parameter and the vibration parameter to judge. Through the collection and judgment mode of the temperature data and the addition of the auxiliary check parameters, the motor temperature fault judgment is more accurate, and the occurrence of the motor fault misjudgment condition caused by the influence of instantaneous high temperature or ambient temperature is effectively reduced.
Drawings
Fig. 1 is a flowchart of a method for determining a fault according to a temperature of a motor according to the present invention.
Fig. 2 is another flowchart of a method for determining a fault according to a temperature of a motor according to the present invention.
Fig. 3 is a further flowchart of a method for determining a fault according to a temperature of a motor according to the present invention.
Fig. 4 is another flowchart of a method for determining a fault according to a temperature of a motor according to the present invention.
Fig. 5 is a schematic block diagram of a device for determining a fault according to a temperature of a motor according to the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, in one aspect, the present invention provides a method for determining a fault according to a temperature of a motor, including the steps of:
s100, acquiring running temperature data of a motor;
acquiring magnetic field data of a motor, and presetting a magnetic field parameter threshold;
obtaining vibration data of a motor, and presetting a vibration parameter threshold;
s200, presetting a maximum temperature change value, acquiring a temperature value set in a first time period, extracting the highest temperature and the lowest temperature in the first time period, and calculating the absolute value of the difference between the highest temperature and the lowest temperature to obtain a first temperature change value; comparing the first temperature change value with the maximum temperature change value to obtain a comparison result;
in this embodiment, the value of the first time period may be taken according to actual needs, and may be 15 minutes, 20 minutes, and the like; the maximum temperature change value is a threshold value of the temperature change amount, and may be set according to actual conditions, and is not particularly limited.
S300, when the first temperature change value is larger than the maximum temperature change value,
acquiring the magnetic field parameter and the vibration parameter in combination with the first time period, and judging whether at least one of the magnetic field parameter and the vibration parameter exceeds a threshold value;
s310, if the fault state exceeds the threshold value, judging that the motor is in a fault state, and simultaneously sending out first alarm information;
and S320, if the motor voltage does not exceed the threshold value, judging that the motor is in a normal state and is influenced by the ambient temperature.
In the embodiment, whether the temperature rise of the motor is abnormal is judged by combining the magnetic field parameter and the vibration parameter, when the voltage is higher than the rated value by more than 10%, the magnetic field strength of the stator and the rotor is increased, the iron loss is increased, and the heat is generated, so that the temperature rise of the motor is influenced by abnormal magnetic field; if the basis of motor installation other mechanical problems such as not firm cause the vibration, also can lead to the friction to generate heat, consequently vibrate unusual also can influence the temperature rise of motor.
Respectively acquiring temperature, a magnetic field and vibration parameters when a motor runs, acquiring a temperature value set in a first time period, extracting the highest temperature and the lowest temperature in the first time period, and calculating the absolute value of the difference between the highest temperature and the lowest temperature to obtain a first temperature change value, and if the first temperature change value is greater than the maximum temperature change value, in order to avoid large temperature change caused by instantaneous high temperature of the external environment, acquiring the magnetic field parameters and the vibration parameters in the first time period and judging whether at least one of the magnetic field parameters and the vibration parameters exceeds a threshold value; if one or two of the motor state signals exceed the threshold value, the motor is judged to be in a fault state, and first alarm information is sent out at the same time; or when the first temperature change value is larger than the maximum temperature change value, detecting whether the temperature of the motor is recovered to be normal or not in the subsequent continuous equal interval time period, if so, judging that the motor is normal, and then, combining the magnetic field parameter and the vibration parameter to judge. Through the collection and judgment mode of the temperature data and the addition of the auxiliary check parameters, the motor temperature fault judgment is more accurate, and the occurrence of the motor fault misjudgment condition caused by the influence of instantaneous high temperature or ambient temperature is effectively reduced.
Referring to fig. 2, after step S200 is executed, step S is preferably further included
S210, when the first temperature change value is larger than the maximum temperature change value, presetting a normal range value of the motor temperature, detecting whether the temperature of the motor is restored to a normal range within a subsequent continuous equal interval time period, and if so, judging that the motor is normal; if not, executing step S300.
In the embodiment, if the temperature of the motor is interfered by the external environment temperature, the setting is carried out in the last continuous time period when the first temperature change value is detected to be greater than the maximum temperature change value; for example, in the iron-making process, the temperature of the motor is correspondingly reduced after heat flow is blown away; if the temperature of the motor is restored to the normal temperature value range, the motor is proved to be normal but is influenced by the environmental temperature; if the temperature of the motor still exceeds the temperature threshold for a subsequent period of time, it is verified that the motor has failed or is still affected by the ambient temperature. In order to ensure the accuracy of fault alarm, if the temperature of the motor still exceeds the temperature threshold value in the subsequent continuous time period, step S300 is executed, and the magnetic field and the vibration parameter are combined to jointly judge whether the motor has a fault.
Referring to fig. 3, preferably, when the first temperature change value is greater than the maximum temperature change value, the magnetic field parameter and the vibration parameter are acquired in combination in a first time period, and it is determined whether at least one of the magnetic field parameter and the vibration parameter exceeds a threshold, and if neither of the magnetic field parameter and the vibration parameter exceeds the threshold, the method further includes the steps of:
s400, adjusting a time period for collecting motor temperature, magnetic field and vibration data to be set as a second time period, wherein the second time period is smaller than the first time period, acquiring a temperature value set in the second time period, extracting the highest temperature and the lowest temperature in the second time period, and calculating the absolute value of the difference between the highest temperature and the lowest temperature to obtain a second temperature change value; and comparing the second temperature change value with the maximum temperature change value.
In this embodiment, the time period for collecting the temperature, the magnetic field, and the vibration data of the motor is adjusted, where the adjustment time period refers to a time period for shortening the collection time period, and since the magnetic field parameter and the vibration parameter at this time are both normal range values, but the temperature rise of the motor is still at an abnormal value, the operation health degree of the whole motor still needs to be detected to be undetermined, and in order to reflect the fault in time, the operation state of the motor needs to be closely concerned, so that the health condition of the motor is judged by shortening the parameter values for collecting the operation states.
It should be noted that the operation parameters of the motor may further include any one or a combination of more of voltage, current, rotation speed, pressure, vibration acceleration, axial locus or axial displacement.
Referring to fig. 3, preferably, when a second temperature variation value is obtained and compared with the maximum temperature variation value, the method further includes the steps of:
s410, when the second temperature change value is larger than the maximum temperature change value,
acquiring the magnetic field parameter and the vibration parameter in combination with the second time period, and judging whether at least one of the magnetic field parameter and the vibration parameter exceeds a threshold value;
s420, if the current value exceeds the threshold value, judging that the motor is in a fault state, and simultaneously sending out second alarm information;
and S430, if the current motor voltage does not exceed the threshold value, judging that the motor is in a normal state and is influenced by the ambient temperature.
In this embodiment, if it is detected that the motor is in the fault state within the second time period, since the motor is already in the fault state to be confirmed at this time, the alarm level of the second alarm message should be greater than the alarm level of the first alarm message to remind the staff of the fault level condition.
Referring to fig. 4, preferably, the method further comprises the steps of:
and S500, obtaining a change oscillogram of the temperature data, the magnetic field data and the vibration data according to time, performing fault pre-judgment analysis according to the change trend of each parameter, and sending out early warning information.
In the embodiment, in order to intelligently pre-judge the fault of the motor, a variation oscillogram corresponding to each parameter is generated according to a time sequence on the acquired operation parameters, and early warning service can be performed on the fault of the motor in advance through waveform trend analysis; the change trend value of each parameter is estimated by calculating the change amplitude value in unit time of each parameter, and when the change amplitude value reaches a certain early warning time and an early warning value, early warning information is sent to a worker, so that the worker can predict the fault reason in advance and have sufficient time to arrange maintenance.
On the other hand, based on the same inventive concept, the invention also provides a device for judging the fault according to the motor temperature, the principle is the same as that of the method for judging the fault according to the motor temperature, and repeated description is omitted here. The method specifically comprises the following steps: with reference to figure 5 of the drawings,
the temperature acquisition module 10 is used for acquiring the operating temperature of the motor;
the magnetic field parameter acquisition module 20 is used for acquiring magnetic field data of the motor and presetting a magnetic field parameter threshold;
the vibration parameter acquisition module 30 is used for acquiring vibration data of the motor and presetting a vibration parameter threshold;
the temperature judgment and comparison module 40 is used for presetting a maximum temperature change value, acquiring a temperature value set in a first time period, extracting the highest temperature and the lowest temperature in the first time period, and calculating the absolute value of the difference between the highest temperature and the lowest temperature to obtain a first temperature change value; comparing the first temperature change value with the maximum temperature change value to obtain a comparison result;
when the first temperature change value is larger than the maximum temperature change value, acquiring the magnetic field parameter and the vibration parameter in combination with the first time period, and judging whether at least one of the magnetic field parameter and the vibration parameter exceeds a threshold value;
if the current state exceeds the threshold value, judging that the motor is in a fault state, and simultaneously sending out first alarm information;
if the current value does not exceed the threshold value, the motor is judged to be in a normal state and is influenced by the ambient temperature.
In the present embodiment, the temperature acquiring module 10 is a temperature sensor; the magnetic field parameter acquisition module 20 is a magnetic field sensor; the vibration parameter acquisition module 30 is a vibration sensor; the temperature judging and comparing module 40 is a control module such as a CPU or an MCU. The temperature judgment and comparison module 40 is respectively connected with the temperature acquisition module 10, the magnetic field parameter acquisition module 20 and the vibration parameter acquisition module 30.
Preferably, the temperature judgment and comparison module is further configured to preset a normal range value of the motor temperature when the first temperature change value is greater than the maximum temperature change value, and detect whether the temperature of the motor is restored to the normal range value within a subsequent continuous equal interval time period.
Preferably, the method further comprises the following steps: the automatic adjusting module 50 is configured to adjust a time period for acquiring motor temperature, magnetic field and vibration data, set the time period as a second time period, acquire a temperature value set in the second time period, extract a highest temperature and a lowest temperature in the second time period, and calculate an absolute value of a difference between the highest temperature and the lowest temperature to obtain a second temperature change value; and comparing the second temperature change value with the maximum temperature change value.
Preferably, the method further comprises the following steps: the automatic adjustment module 50 is further configured to, when the second temperature change value is greater than the maximum temperature change value, obtain the magnetic field parameter and the vibration parameter in combination with the second time period, and determine whether at least one of the magnetic field parameter and the vibration parameter exceeds a threshold;
if the current state exceeds the threshold value, judging that the motor is in a fault state, and simultaneously sending out second alarm information;
if the current value does not exceed the threshold value, the motor is judged to be in a normal state and is influenced by the ambient temperature.
Preferably, the method further comprises the following steps: and the early warning judgment module 60 is configured to obtain a change oscillogram of the temperature data, the magnetic field data, and the vibration data according to time, perform failure early warning analysis according to a change trend of each parameter, and send out early warning information.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. A method for judging a fault according to the temperature of a motor is characterized by comprising the following steps:
s100, acquiring running temperature data of a motor;
acquiring magnetic field data of a motor, and presetting a magnetic field parameter threshold;
obtaining vibration data of a motor, and presetting a vibration parameter threshold;
s200, presetting a maximum temperature change value, acquiring a temperature value set in a first time period, extracting the highest temperature and the lowest temperature in the first time period, and calculating the absolute value of the difference between the highest temperature and the lowest temperature to obtain a first temperature change value; comparing the first temperature change value with the maximum temperature change value to obtain a comparison result;
s300, when the first temperature change value is larger than the maximum temperature change value,
acquiring the magnetic field parameter and the vibration parameter in combination with the first time period, and judging whether at least one of the magnetic field parameter and the vibration parameter exceeds a threshold value;
s310, if the fault state exceeds the threshold value, judging that the motor is in a fault state, and simultaneously sending out first alarm information;
and S320, if the motor voltage does not exceed the threshold value, judging that the motor is in a normal state and is influenced by the ambient temperature.
2. The method for determining fault according to motor temperature of claim 1, further comprising the step of performing step S200 and then determining fault according to motor temperature
S210, when the first temperature change value is larger than the maximum temperature change value, presetting a normal range value of the motor temperature, detecting whether the temperature of the motor is restored to a normal range value within a subsequent continuous equal interval time period, and if so, judging that the motor is normal; if not, go to step S300.
3. The method according to claim 1, wherein when the first temperature variation value is greater than the maximum temperature variation value, the magnetic field parameter and the vibration parameter are acquired in combination with a first time period, and whether at least one of the magnetic field parameter and the vibration parameter exceeds a threshold value is determined, and if neither of the magnetic field parameter and the vibration parameter exceeds the threshold value, the method further comprises the following steps:
s400, adjusting a time period for collecting motor temperature, magnetic field and vibration data to be set as a second time period, wherein the second time period is smaller than the first time period, acquiring a temperature value set in the second time period, extracting the highest temperature and the lowest temperature in the second time period, and calculating the absolute value of the difference between the highest temperature and the lowest temperature to obtain a second temperature change value; and comparing the second temperature change value with the maximum temperature change value.
4. The method for judging a fault according to the temperature of the motor according to claim 3, wherein when a second temperature variation value is derived and compared with the maximum temperature variation value, further comprising the steps of:
s410, when the second temperature change value is larger than the maximum temperature change value,
acquiring the magnetic field parameter and the vibration parameter in combination with the second time period, and judging whether at least one of the magnetic field parameter and the vibration parameter exceeds a threshold value;
s420, if the current value exceeds the threshold value, judging that the motor is in a fault state, and simultaneously sending out second alarm information;
and S430, if the current motor voltage does not exceed the threshold value, judging that the motor is in a normal state and is influenced by the ambient temperature.
5. The method for judging a fault according to the temperature of the motor of claim 1, further comprising the steps of:
and S500, obtaining a change oscillogram of the temperature data, the magnetic field data and the vibration data according to time, performing fault pre-judgment analysis according to the change trend of each parameter, and sending out early warning information.
6. An apparatus for determining a fault based on a temperature of a motor, comprising:
the temperature acquisition module is used for acquiring the operating temperature of the motor;
the magnetic field parameter acquisition module is used for acquiring magnetic field data of the motor and presetting a magnetic field parameter threshold;
the vibration parameter acquisition module is used for acquiring vibration data of the motor and presetting a vibration parameter threshold;
the temperature judgment and comparison module is used for presetting a maximum temperature change value, acquiring a temperature value set in a first time period, extracting the highest temperature and the lowest temperature in the first time period, and calculating the absolute value of the difference between the highest temperature and the lowest temperature to obtain a first temperature change value; comparing the first temperature change value with the maximum temperature change value to obtain a comparison result;
when the first temperature change value is larger than the maximum temperature change value, acquiring the magnetic field parameter and the vibration parameter in combination with the first time period, and judging whether at least one of the magnetic field parameter and the vibration parameter exceeds a threshold value;
if the current state exceeds the threshold value, judging that the motor is in a fault state, and simultaneously sending out first alarm information;
if the current value does not exceed the threshold value, the motor is judged to be in a normal state and is influenced by the ambient temperature.
7. The system for determining a fault according to motor temperature of claim 6,
the temperature judgment and comparison module is further used for presetting a normal range value of the motor temperature when the first temperature change value is larger than the maximum temperature change value, and detecting whether the temperature of the motor is restored to the normal range value within the subsequent continuous equal interval time period.
8. The system for determining a fault based on motor temperature of claim 6, further comprising:
the automatic adjusting module is used for adjusting a time period for collecting motor temperature, magnetic field and vibration data, setting the time period as a second time period, acquiring a temperature value set in the second time period, extracting the highest temperature and the lowest temperature in the second time period, and calculating the absolute value of the difference between the highest temperature and the lowest temperature to obtain a second temperature change value; and comparing the second temperature change value with the maximum temperature change value.
9. The system for determining a fault based on motor temperature of claim 8, further comprising:
the automatic adjusting module is further configured to, when the second temperature change value is greater than the maximum temperature change value, obtain the magnetic field parameter and the vibration parameter in combination with the second time period, and determine whether at least one of the magnetic field parameter and the vibration parameter exceeds a threshold value;
if the current state exceeds the threshold value, judging that the motor is in a fault state, and simultaneously sending out second alarm information;
if the current value does not exceed the threshold value, the motor is judged to be in a normal state and is influenced by the ambient temperature.
10. The system for determining a fault based on motor temperature of claim 6, further comprising:
and the early warning judgment module is used for obtaining a change oscillogram of the temperature data, the magnetic field data and the vibration data according to time, carrying out fault early warning analysis according to the change trend of each parameter and sending out early warning information.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114295155A (en) * | 2021-10-22 | 2022-04-08 | 广东省建设工程质量安全检测总站有限公司 | Microprocessing monitoring method, microprocessing monitoring device, microprocessing monitoring equipment and storage medium for electrical equipment |
| CN115792362A (en) * | 2022-10-31 | 2023-03-14 | 国家能源蓬莱发电有限公司 | Power plant thermal control equipment monitoring method and related device |
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