CN111751722A - Oil-gas pump motor fault detection method and device - Google Patents
Oil-gas pump motor fault detection method and device Download PDFInfo
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- CN111751722A CN111751722A CN202010546823.XA CN202010546823A CN111751722A CN 111751722 A CN111751722 A CN 111751722A CN 202010546823 A CN202010546823 A CN 202010546823A CN 111751722 A CN111751722 A CN 111751722A
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The invention discloses a fault detection method and a fault detection device for an oil-gas pump motor, which relate to the technical field of oil-gas pump motors and are used for obtaining a first preset current threshold; obtaining real-time current of a motor bus; obtaining a motor bus current fluctuation value according to the motor bus real-time current; judging whether the fluctuation value exceeds a first preset current threshold value or not; if the fluctuation value exceeds a first preset current threshold value, obtaining a first instruction, wherein the first instruction is used for controlling the motor to stop running and judging whether the motor is locked; if the motor is locked, the motor locked-rotor time is obtained; obtaining a first predetermined time threshold; judging whether the motor stalling time exceeds a first preset time threshold value or not; and if the motor stalling time exceeds a first preset time threshold, obtaining a second instruction, wherein the second instruction is used for checking a motor bearing. The technical effects of judging whether the motor is locked or not according to the fluctuation condition of the motor current, and stopping the motor to run in time if the locked or locked are generated, thereby protecting the safety of the motor are achieved.
Description
Technical Field
The application relates to the technical field of oil-gas pump motors, in particular to a method and a device for detecting faults of an oil-gas pump motor.
Background
The gasoline stations can generate oil gas leakage in the processes of storing, transporting and selling gasoline, so that the problems of safety, environmental protection, low energy utilization rate and the like are caused, and the gasoline stations are forced to establish an oil gas recovery system for oil gas recovery. The oil-gas pump is used as a vital device in an oil-gas recovery system, and the safe operation of the oil-gas pump is particularly critical.
However, in the process of implementing the technical solution in the embodiment of the present application, the inventor of the present application finds that the above prior art has at least the following technical problems:
in the prior art, the oil-gas pump motor fault detection method can only detect whether the motor is in overpressure or under-voltage, cannot judge whether the motor is locked-rotor according to the fluctuation condition of current, and cannot stop the motor to run when the motor is locked-rotor, so that the motor is damaged.
Content of application
The embodiment of the application provides an oil-gas pump motor fault detection method and device, and solves the technical problems that in the prior art, the oil-gas pump motor fault detection method cannot judge whether the motor is locked or not according to the fluctuation condition of current, and even cannot stop the motor to run in time when the motor is locked or not, so that the motor is damaged, and the technical effect of judging whether the motor is locked or not according to the fluctuation condition of the motor current and protecting the motor safety if the motor is locked or not is achieved.
In order to solve the above problem, in a first aspect, an embodiment of the present application provides a method for detecting a fault of an oil and gas pump motor, where the method includes: obtaining a first predetermined current threshold; obtaining real-time current of a motor bus; obtaining a current fluctuation value of the motor bus according to the real-time current of the motor bus; judging whether the fluctuation value exceeds the first preset current threshold value or not; if the fluctuation value exceeds the first preset current threshold value, obtaining a first instruction, wherein the first instruction is used for controlling the motor to stop running and judging whether the motor is locked; if the motor is locked, obtaining the locked-rotor time of the motor; obtaining a first predetermined time threshold; judging whether the motor stalling time exceeds the first preset time threshold or not; and if the motor stalling time exceeds the first preset time threshold, obtaining a second instruction, wherein the second instruction is used for checking a motor bearing.
Preferably, the method comprises: obtaining motor operation information; judging whether the motor normally operates according to the motor operation information; if the motor cannot normally operate, obtaining a first current of the motor; obtaining a second predetermined current threshold; judging whether the first current exceeds the second preset current threshold value; if the first current exceeds the second current threshold, obtaining a third instruction, wherein the third instruction is used for controlling the motor to rotate towards a first rotating direction; and obtaining a fourth instruction, wherein the fourth instruction is used for controlling the motor to rotate towards a second rotation direction after the third instruction, and the second rotation direction and the first rotation direction are opposite rotation directions.
Preferably, the method comprises: obtaining a third predetermined time threshold; the motor alternately executes the third instruction and the fourth instruction by taking the third preset time threshold as a cycle; obtaining a second predetermined time threshold; obtaining a first running time, wherein the first running time is the time for the motor to execute the third instruction and the fourth instruction; judging whether the first running time reaches the second preset time threshold value or not; and if the first running time reaches the second preset time threshold, judging whether the motor is recovered to be normal.
Preferably, the judging whether the motor is normal or not includes: obtaining a fourth predetermined time; obtaining a fifth instruction, wherein the fifth instruction is used for controlling the motor to execute a unidirectional operation instruction within the fourth preset threshold value; judging whether the motor has jitter and/or noise when executing the fifth instruction; if the motor does not have the jitter and/or the noise when executing the fifth instruction, determining that the motor can normally operate; and if the motor does not have the jitter and/or the noise when executing the fifth command, obtaining a sixth command, wherein the sixth command is used for carrying out rotor inspection on the motor.
Preferably, the method comprises: obtaining a first position signal; obtaining a second position signal, wherein the second position signal and the first position signal are position signals which are adjacent to each other twice and have phase change; obtaining a first time at which the first position signal is spaced from the second position signal; obtaining a fifth predetermined time threshold; judging whether the first time exceeds a fifth preset time threshold value; and if the first time exceeds the preset time threshold, determining that one Hall sensor has a fault.
Preferably, the method comprises: the method comprises the steps that an upper computer of the motor obtains operation information of the motor, wherein the operation information comprises current, voltage and temperature; and analyzing the operation information, and judging whether the motor has the information of no fault in the operation process.
Preferably, the analyzing the operation information to determine whether the motor has no fault information found in the operation process includes: the degree of dispersion J of the operation information measurement data is expressed by the following equation:
wherein, the a [ i]Is an ideal signal; b [ i ]]Is an actual signal; obtaining a predetermined threshold; if J is larger than the preset threshold value, determining that no fault information is found in the motor in the operation process; and if J is smaller than the preset threshold value, determining that no fault information is found in the motor in the operation process.
In a second aspect, an embodiment of the present application further provides an oil and gas pump motor fault detection device, the device includes:
a first obtaining unit for obtaining a first predetermined current threshold;
the second obtaining unit is used for obtaining real-time current of a motor bus;
the third obtaining unit is used for obtaining a current fluctuation value of the motor bus according to the real-time current of the motor bus;
a first judgment unit for judging whether the fluctuation value exceeds the first predetermined current threshold;
a fourth obtaining unit, configured to obtain a first instruction if the fluctuation value exceeds the first predetermined current threshold, where the first instruction is used to control the motor to stop operating and determine whether the motor is locked;
a fifth obtaining unit, configured to obtain a motor stalling time if the motor stalls;
a sixth obtaining unit configured to obtain a first predetermined time threshold;
a second judging unit, configured to judge whether the motor stalling time exceeds the first predetermined time threshold;
a seventh obtaining unit, configured to obtain a second instruction if the motor stalling time exceeds the first predetermined time threshold, where the second instruction is used to check a motor bearing.
Preferably, the apparatus comprises:
an eighth obtaining unit configured to obtain motor operation information;
the third judging unit is used for judging whether the motor normally operates according to the motor operation information;
a ninth obtaining unit, configured to obtain the first current of the motor if the motor cannot operate normally;
a tenth obtaining unit for obtaining a second predetermined current threshold;
a fourth judging unit configured to judge whether the first current exceeds the second predetermined current threshold;
an eleventh obtaining unit configured to obtain a third instruction for controlling the motor to rotate in a first rotation direction if the first current exceeds the second current threshold;
a twelfth obtaining unit, configured to obtain a fourth instruction, where the fourth instruction is used to control the motor to rotate in a second rotation direction after the third instruction, and the second rotation direction and the first rotation direction are opposite rotation directions to each other.
Preferably, the apparatus comprises:
a thirteenth obtaining unit configured to obtain a third predetermined time threshold;
a first execution unit, configured to alternately execute the third instruction and the fourth instruction by the motor with the third predetermined time threshold as a cycle;
a fourteenth obtaining unit configured to obtain a second predetermined time threshold;
a fifteenth obtaining unit configured to obtain a first operating time, which is a time when the motor executes the third instruction and the fourth instruction;
a fifth judging unit configured to judge whether the first operating time reaches the second predetermined time threshold;
and the sixth judging unit is used for judging whether the motor is recovered to be normal or not if the first running time reaches the second preset time threshold.
Preferably, the sixth judging unit includes:
a sixteenth obtaining unit configured to obtain a fourth predetermined time;
a seventeenth obtaining unit, configured to obtain a fifth instruction, where the fifth instruction is used to control the motor to execute a unidirectional operation instruction within the fourth predetermined threshold;
a seventh judging unit, configured to judge whether there is jitter and/or noise when the motor executes the fifth instruction;
a first determination unit for determining that the motor can normally operate if the motor does not have the jitter and/or noise while executing the fifth command;
an eighteenth obtaining unit configured to obtain a sixth instruction for performing a rotor check on the motor if the motor does not have the shake and/or the noise while executing the fifth instruction.
Preferably, the apparatus comprises:
a nineteenth obtaining unit for obtaining a first position signal;
a twentieth obtaining unit, configured to obtain a second position signal, where the second position signal and the first position signal are position signals that are adjacent to each other twice and are phase-exchanged;
a twenty-first obtaining unit for obtaining a first time at which the first position signal is alternated with the second position signal;
a twenty-second obtaining unit configured to obtain a fifth predetermined time threshold;
an eighth judging unit, configured to judge whether the first time exceeds the fifth predetermined time threshold;
a second determination unit to determine that one of the Hall sensors is malfunctioning if the first time exceeds the predetermined time threshold.
Preferably, the apparatus comprises:
a twenty-third obtaining unit, configured to obtain operation information of the motor by an upper computer of the motor, where the operation information includes current, voltage, and temperature;
and the ninth judging unit is used for analyzing the operation information and judging whether the motor has the information of no fault in the operation process.
Preferably, the ninth judging unit includes:
the degree of dispersion J of the operation information measurement data is expressed by the following equation:
wherein a [ i ] is an ideal signal; b [ i ] is the actual signal;
a twenty-fourth obtaining unit for obtaining a predetermined threshold;
a third determination unit, configured to determine that no fault information is found in the operation process of the motor if J is greater than the predetermined threshold;
a fourth determination unit configured to determine that no undiscovered fault information has occurred in the motor during operation if J is less than the predetermined threshold.
In a third aspect, an embodiment of the present application further provides an oil and gas pump motor fault detection apparatus, including a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor implements the following steps when executing the program: obtaining a first predetermined current threshold; obtaining real-time current of a motor bus; obtaining a current fluctuation value of the motor bus according to the real-time current of the motor bus; judging whether the fluctuation value exceeds the first preset current threshold value or not; if the fluctuation value exceeds the first preset current threshold value, obtaining a first instruction, wherein the first instruction is used for controlling the motor to stop running and judging whether the motor is locked; if the motor is locked, obtaining the locked-rotor time of the motor; obtaining a first predetermined time threshold; judging whether the motor stalling time exceeds the first preset time threshold or not; and if the motor stalling time exceeds the first preset time threshold, obtaining a second instruction, wherein the second instruction is used for checking a motor bearing.
In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the following steps: obtaining a first predetermined current threshold; obtaining real-time current of a motor bus; obtaining a current fluctuation value of the motor bus according to the real-time current of the motor bus; judging whether the fluctuation value exceeds the first preset current threshold value or not; if the fluctuation value exceeds the first preset current threshold value, obtaining a first instruction, wherein the first instruction is used for controlling the motor to stop running and judging whether the motor is locked; if the motor is locked, obtaining the locked-rotor time of the motor; obtaining a first predetermined time threshold; judging whether the motor stalling time exceeds the first preset time threshold or not; and if the motor stalling time exceeds the first preset time threshold, obtaining a second instruction, wherein the second instruction is used for checking a motor bearing.
One or more technical solutions in the embodiments of the present application have at least one or more of the following technical effects:
the embodiment of the application provides a method and a device for detecting the motor fault of an oil-gas pump, wherein the method comprises the following steps: obtaining a first predetermined current threshold; obtaining real-time current of a motor bus; obtaining a current fluctuation value of the motor bus according to the real-time current of the motor bus; judging whether the fluctuation value exceeds the first preset current threshold value or not; if the fluctuation value exceeds the first preset current threshold value, obtaining a first instruction, wherein the first instruction is used for controlling the motor to stop running and judging whether the motor is locked; if the motor is locked, obtaining the locked-rotor time of the motor; obtaining a first predetermined time threshold; judging whether the motor stalling time exceeds the first preset time threshold or not; and if the motor stalling time exceeds the first preset time threshold, obtaining a second instruction, wherein the second instruction is used for checking a motor bearing. The technical problem that whether the motor is locked up or not can not be judged according to the fluctuation condition of current and the motor can not be stopped in time to cause the motor damage when the motor is locked up in the oil-gas pump motor fault detection method in the prior art is solved, and the technical effects that whether the motor is locked up or not is judged according to the fluctuation condition of the motor current and the motor is stopped in time to protect the motor safety if the motor is locked up are achieved.
The foregoing description is only an overview of the technical solutions of the present application, and the present application can be implemented according to the content of the description in order to make the technical means of the present application more clearly understood, and the following detailed description of the present application is given in order to make the above and other objects, features, and advantages of the present application more clearly understandable.
Drawings
FIG. 1 is a schematic flow chart of a method for detecting a fault in a motor of an oil and gas pump according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a motor fault detection device of an oil and gas pump in an embodiment of the invention;
fig. 3 is a schematic structural diagram of another oil-gas pump motor fault detection device in the embodiment of the invention.
Description of reference numerals: a first obtaining unit 11, a second obtaining unit 12, a third obtaining unit 13, a first judging unit 14, a fourth obtaining unit 15, a fifth obtaining unit 16, a sixth obtaining unit 17, a second judging unit 18, a seventh obtaining unit 19, a bus 300, a receiver 301, a processor 302, a transmitter 303, a memory 304, and a bus interface 306.
Detailed Description
The embodiment of the application provides an oil-gas pump motor fault detection method and device, and solves the technical problems that in the prior art, the oil-gas pump motor fault detection method cannot judge whether a motor is locked or not according to the fluctuation condition of current, and even cannot stop the motor to run in time when the motor is locked or not, so that the motor is damaged, and the technical effect of judging whether the motor is locked or not according to the fluctuation condition of the motor current and protecting the motor safety if the motor is locked or not is stopped in time when the motor is locked or not is achieved.
In order to solve the technical problems, the technical scheme provided by the application has the following general idea:
a method of detecting a fault in an oil and gas pump motor, the method comprising: obtaining a first predetermined current threshold; obtaining real-time current of a motor bus; obtaining a current fluctuation value of the motor bus according to the real-time current of the motor bus; judging whether the fluctuation value exceeds the first preset current threshold value or not; if the fluctuation value exceeds the first preset current threshold value, obtaining a first instruction, wherein the first instruction is used for controlling the motor to stop running and judging whether the motor is locked; if the motor is locked, obtaining the locked-rotor time of the motor; obtaining a first predetermined time threshold; judging whether the motor stalling time exceeds the first preset time threshold or not; and if the motor stalling time exceeds the first preset time threshold, obtaining a second instruction, wherein the second instruction is used for checking a motor bearing. The technical problem that whether the motor is locked up or not can not be judged according to the fluctuation condition of current and the motor can not be stopped in time to cause the motor damage when the motor is locked up in the oil-gas pump motor fault detection method in the prior art is solved, and the technical effects that whether the motor is locked up or not is judged according to the fluctuation condition of the motor current and the motor is stopped in time to protect the motor safety if the motor is locked up are achieved.
The technical solutions of the present application are described in detail below with reference to the drawings and specific embodiments, and it should be understood that the specific features in the embodiments and examples of the present application are detailed descriptions of the technical solutions of the present application, and are not limitations of the technical solutions of the present application, and the technical features in the embodiments and examples of the present application may be combined with each other without conflict.
Example one
The method is applied to an oil-gas pump motor fault detection system, the detection system comprises an upper computer and a Hall sensor, the Hall sensor is used for detecting current and position information of the motor, the Hall sensor is in communication connection with the upper computer, and the upper computer controls operation of the motor. The method comprises the following steps:
step S110: obtaining a first predetermined current threshold;
specifically, the first predetermined current threshold is a preset current threshold, and is used for determining whether a motor bus current fluctuation value exceeds a range, and the first predetermined current threshold is preset in the upper computer.
Step S120: obtaining real-time current of a motor bus;
specifically, the real-time current is a real-time current value of the motor bus in the operation process of the motor.
Step S130: obtaining a current fluctuation value of the motor bus according to the real-time current of the motor bus;
specifically, a minimum value and a maximum value of the real-time current in a first time period are obtained, and the fluctuation value is the maximum value-the minimum value.
Step S140: judging whether the fluctuation value exceeds the first preset current threshold value or not;
step S150: if the fluctuation value exceeds the first preset current threshold value, obtaining a first instruction, wherein the first instruction is used for controlling the motor to stop running and judging whether the motor is locked;
specifically, when the fluctuation value is larger than the first preset current threshold value, it is indicated that the current fluctuation of the bus is too large and the current is unstable, the upper computer sends the first instruction, and the first instruction is used for immediately turning off the power supply of the motor. And after the motor stops running, detecting whether the motor is locked or not. And obtaining the rated current of the bus of the motor, wherein when the locked rotor phenomenon occurs, the torque of the motor is zero, the torque is not zero, and the bus current of the motor is more than 7 times of the rated current. Therefore, when the torque of the motor is zero, the torque is not zero, and the current of the bus is greater than 7 times of the rated current, whether the motor is in a locked-rotor phenomenon or not is judged.
Step S160: if the motor is locked, obtaining the locked-rotor time of the motor;
specifically, when it is determined that the motor is locked, a first time point is obtained, wherein the first time point is a starting time when the bus current of the motor is greater than 7 times the rated current. And obtaining a second time point, wherein the second time point is a time point when the motor stops running, and the locked-rotor time is the second time point-the first time point.
Step S170: obtaining a first predetermined time threshold;
step S180: judging whether the motor stalling time exceeds the first preset time threshold or not;
step S190: and if the motor stalling time exceeds the first preset time threshold, obtaining a second instruction, wherein the second instruction is used for checking a motor bearing.
Specifically, when the stalling time is longer than the first preset time threshold, the motor stalling time is over long, the winding of the motor is possibly burnt, the upper computer sends a second instruction, and the instruction immediately checks whether the bearing of the motor is damaged; and when the locked rotor time is less than the first preset time threshold, the locked rotor time of the motor is not long, and the winding of the motor cannot be burnt. Whether the motor winding is burnt out or not is judged according to the locked rotor time, the motor bearing is checked through instructions, the safety of the motor bearing is ensured, and therefore the technical effect of ensuring the normal operation of the motor is achieved.
Further, the method comprises:
obtaining motor operation information;
judging whether the motor normally operates according to the motor operation information;
if the motor cannot normally operate, obtaining a first current of the motor;
obtaining a second predetermined current threshold;
judging whether the first current exceeds the second preset current threshold value;
if the first current exceeds the second current threshold, obtaining a third instruction, wherein the third instruction is used for controlling the motor to rotate towards a first rotating direction;
and obtaining a fourth instruction, wherein the fourth instruction is used for controlling the motor to rotate towards a second rotation direction after the third instruction, and the second rotation direction and the first rotation direction are opposite rotation directions.
Specifically, the motor is a brushless direct current motor, the brushless direct current motor does not operate for a long time, rust may be generated in the brushless direct current motor to cause a clamping groove, and the motor cannot operate when the motor is normally started. The operation information of the motor is mainly the rotating speed information of the motor, and whether the motor operates normally can be judged according to the rotating speed information. And when the rotating speed of the motor is less than the normal starting rotating speed of the motor, judging that the motor cannot normally operate. And when the motor cannot normally run, acquiring real-time current information of the motor bus, namely the first current.
When the motor is started, the motor rotates according to an initial rotation direction, when the first current is larger than the second preset current threshold value, the situation that the motor has a clamping groove phenomenon in the initial rotation direction is indicated, at the moment, the motor is controlled to rotate around the first direction, and the first rotation direction is opposite to the initial rotation direction. When the motor is along the rotatory second time quantum of first direction of rotation, just first electric current is not more than when the second predetermined current threshold value, explain the draw-in groove phenomenon disappears, sends the third instruction, control the motor is followed the second direction of rotation rotates the third time quantum, reaches under the circumstances of guaranteeing that the motor is not burnt out, adopts levogyration dextrorotation method to eliminate the draw-in groove phenomenon, guarantees the motor can normal operating's technological effect.
Further, the method comprises:
obtaining a third predetermined time threshold;
the motor alternately executes the third instruction and the fourth instruction by taking the third preset time threshold as a cycle;
obtaining a second predetermined time threshold;
obtaining a first running time, wherein the first running time is the time for the motor to execute the third instruction and the fourth instruction;
judging whether the first running time reaches the second preset time threshold value or not;
and if the first running time reaches the second preset time threshold, judging whether the motor is recovered to be normal.
Specifically, the motor alternately rotates in the first rotation direction and the second rotation direction with the third predetermined time threshold as a cycle, that is, the first time period + the second time period is equal to the third predetermined time threshold, where the third predetermined time threshold is 1-2 minutes. The first operation time is the time for the motor to periodically and alternately operate, when the first operation time is equal to the second preset time threshold, namely when the motor operates for the first preset time threshold duration, whether the motor is normal or not is judged, and if the motor is normal, the phenomenon of the clamping groove disappears.
Further, the determining whether the motor is normal includes:
obtaining a fourth predetermined time;
obtaining a fifth instruction, wherein the fifth instruction is used for controlling the motor to execute a unidirectional operation instruction within the fourth preset threshold value;
judging whether the motor has jitter and/or noise when executing the fifth instruction;
if the motor does not have the jitter and/or the noise when executing the fifth instruction, determining that the motor can normally operate;
and if the motor does not have the jitter and/or the noise when executing the fifth command, obtaining a sixth command, wherein the sixth command is used for carrying out rotor inspection on the motor.
Specifically, after the motor is periodically and alternately operated, the motor is controlled to operate unidirectionally for the fourth predetermined time in the first rotation direction or the second rotation direction. In the one-way operation process, judging whether the motor has abnormal phenomena such as jitter, noise and the like, if the abnormal phenomena do not exist, indicating that the motor is recovered to be normal and can be normally used; and if the abnormal phenomenon exists, checking the rotor of the motor. The technical effect of ensuring the use safety of the motor is achieved by further judging whether the motor has other abnormal phenomena after the clamping groove phenomenon is eliminated by using a left-handed and right-handed rotation method and ensuring the normal operation of the motor.
Further, the method comprises:
obtaining a first position signal;
obtaining a second position signal, wherein the second position signal and the first position signal are position signals which are adjacent to each other twice and have phase change;
obtaining a first time at which the first position signal is spaced from the second position signal;
obtaining a fifth predetermined time threshold;
judging whether the first time exceeds a fifth preset time threshold value;
and if the first time exceeds the preset time threshold, determining that one Hall sensor has a fault.
Specifically, the Hall sensor provides a position signal in the running process of the motor, and the motor can accurately carry out phase change operation according to the position signal. When the Hall sensor breaks down, the position signal can be continuously at a high level or a low level, and when the motor carries out reversing operation according to the position signal, the motor shakes slightly, and the rotating speed is not stable; in severe cases, the motor windings are damaged, and the position signal must be monitored.
The first position signal and the second position signal are position signals provided by the Hall sensor, and the first position signal and the second position signal are different. Normally, the first position signal and the second position signal appear at intervals, and the intervals are the same. And obtaining a time interval between the first position signal and the second position signal in real time, namely the first time, and when the first time is greater than a fifth preset time threshold, indicating that the first position signal and the second position signal do not alternate, so that a fault of one Hall sensor can be determined. At the moment, the operation of the motor is immediately stopped, the Hall sensor in the motor is detected, the Hall sensor with the fault is found, whether the Hall sensor has the fault or not is judged according to the interval time of the position signal, and the technical effect of avoiding damage to the motor due to the fault of the Hall sensor is achieved.
Further, the method comprises:
obtaining a predetermined period of the first position signal and the second position signal;
and when the first time is more than 2 times of the preset period, judging that one Hall sensor has a fault.
Specifically, the predetermined period is a complete period in which the first position signal and the second position signal are normally exchanged once. And when the first time is more than 2 times of the preset period, namely when the first position signal and the second position signal are not converted in two preset periods, judging that one Hall signal has a fault. The technical effects of shortening the time for judging the failure of the Hall sensor, accelerating the response speed of the detection system, timely finding the failure of the Hall sensor method, timely carrying out power-off protection on the motor and avoiding the damage of the motor are achieved.
Further, the method comprises:
the method comprises the steps that an upper computer of the motor obtains operation information of the motor, wherein the operation information comprises current, voltage and temperature;
and analyzing the operation information, and judging whether the motor has the information of no fault in the operation process.
Specifically, the operation information is information such as voltage, current and temperature in the operation process of the motor, and the operation information is transmitted to the upper computer in real time through a 485 or 232 bus. And in the running process of the motor, the upper computer detects the fault information of the motor in real time according to the running information. After the motor finishes running, the upper computer analyzes all running information during the running of the motor and judges whether the motor does not find fault information in running devices or not, so that the running information during the running of the motor is reached, hidden fault information existing in the motor is found, the potential safety hazard of the motor is found in time, and the technical effect of normal and safe running of the motor is ensured.
Further, the analyzing the operation information to determine whether the motor has no fault information found in the operation process includes:
the degree of dispersion J of the operation information measurement data is expressed by the following equation:
wherein a [ i ] is an ideal signal; b [ i ] is the actual signal;
obtaining a predetermined threshold;
if J is larger than the preset threshold value, determining that no fault information is found in the motor in the operation process;
and if J is smaller than the preset threshold value, determining that no fault information is found in the motor in the operation process.
Specifically, the present embodiment is suitable for analyzing the operation information of the motor, such as current, voltage, and temperature, to find a hidden fault existing in the motor, taking current information as an example. In a fourth time interval, n actual current signals are taken at the same time interval, a [ i ] is an ideal current signal corresponding to the ith actual current signal, b [ i ] is the ith actual current signal, wherein the time length of the fourth time interval can be set by a user according to requirements. The fourth time interval is selected in the steady-state operation process of the motor, because the rotating speed of the motor is adjusted in different ways during the acceleration and deceleration of the motor, the current signal changes continuously, and the ideal current signal is difficult to determine. In the fourth time period, the discrete degree J of the n current signals is:
wherein b [ i ] is the ith actual current signal; and ai is the ideal current signal corresponding to the ith actual current signal.
When J is larger than the preset threshold, the current abnormality of the motor in the operation process is shown in the fourth time period, the condition that no fault information is found in the motor in the operation process is determined, the abnormal current needs to be further analyzed, and the fault information which is not found is determined; when J is smaller than the preset threshold, the fact that no current abnormality occurs in the motor in the operation process in the fourth time period is indicated, and it is determined that no fault information is found in the motor in the operation process. The technical effects that whether the operation information is abnormal or not is judged according to the dispersion of the operation information in the steady-state operation process of the motor, the hidden fault of the motor is found, and the accuracy of a monitoring system is improved are achieved.
Example two
Based on the same inventive concept as the oil-gas pump motor fault detection method in the foregoing embodiment, the present invention further provides an oil-gas pump motor fault detection apparatus, as shown in fig. 2, the apparatus includes:
a first obtaining unit 11, wherein the first obtaining unit 11 is used for obtaining a first predetermined current threshold value;
the second obtaining unit 12 is used for obtaining real-time current of a motor bus by the second obtaining unit 12;
a third obtaining unit 13, where the third obtaining unit 13 is configured to obtain a current fluctuation value of the motor bus according to the real-time current of the motor bus;
a first judging unit 14, wherein the first judging unit 14 is used for judging whether the fluctuation value exceeds the first preset current threshold value;
a fourth obtaining unit 15, where the fourth obtaining unit 15 is configured to obtain a first instruction if the fluctuation value exceeds the first predetermined current threshold, where the first instruction is used to control the motor to stop running, and determine whether the motor is locked;
a fifth obtaining unit 16, where the fifth obtaining unit 16 is configured to obtain a motor stalling time if the motor stalls;
a sixth obtaining unit 17, the sixth obtaining unit 17 being configured to obtain a first predetermined time threshold;
a second determining unit 18, where the second determining unit 18 is configured to determine whether the motor stalling time exceeds the first predetermined time threshold;
a seventh obtaining unit 19, where the seventh obtaining unit 19 is configured to obtain a second instruction if the motor stalling time exceeds the first predetermined time threshold, and the second instruction is used to check a motor bearing.
Preferably, the apparatus comprises:
an eighth obtaining unit configured to obtain motor operation information;
the third judging unit is used for judging whether the motor normally operates according to the motor operation information;
a ninth obtaining unit, configured to obtain the first current of the motor if the motor cannot operate normally;
a tenth obtaining unit for obtaining a second predetermined current threshold;
a fourth judging unit configured to judge whether the first current exceeds the second predetermined current threshold;
an eleventh obtaining unit configured to obtain a third instruction for controlling the motor to rotate in a first rotation direction if the first current exceeds the second current threshold;
a twelfth obtaining unit, configured to obtain a fourth instruction, where the fourth instruction is used to control the motor to rotate in a second rotation direction after the third instruction, and the second rotation direction and the first rotation direction are opposite rotation directions to each other.
Preferably, the apparatus comprises:
a thirteenth obtaining unit configured to obtain a third predetermined time threshold;
a first execution unit, configured to alternately execute the third instruction and the fourth instruction by the motor with the third predetermined time threshold as a cycle;
a fourteenth obtaining unit configured to obtain a second predetermined time threshold;
a fifteenth obtaining unit configured to obtain a first operating time, which is a time when the motor executes the third instruction and the fourth instruction;
a fifth judging unit configured to judge whether the first operating time reaches the second predetermined time threshold;
and the sixth judging unit is used for judging whether the motor is recovered to be normal or not if the first running time reaches the second preset time threshold.
Preferably, the sixth judging unit includes:
a sixteenth obtaining unit configured to obtain a fourth predetermined time;
a seventeenth obtaining unit, configured to obtain a fifth instruction, where the fifth instruction is used to control the motor to execute a unidirectional operation instruction within the fourth predetermined threshold;
a seventh judging unit, configured to judge whether there is jitter and/or noise when the motor executes the fifth instruction;
a first determination unit for determining that the motor can normally operate if the motor does not have the jitter and/or noise while executing the fifth command;
an eighteenth obtaining unit configured to obtain a sixth instruction for performing a rotor check on the motor if the motor does not have the shake and/or the noise while executing the fifth instruction.
Preferably, the apparatus comprises:
a nineteenth obtaining unit for obtaining a first position signal;
a twentieth obtaining unit, configured to obtain a second position signal, where the second position signal and the first position signal are position signals that are adjacent to each other twice and are phase-exchanged;
a twenty-first obtaining unit for obtaining a first time at which the first position signal is alternated with the second position signal;
a twenty-second obtaining unit configured to obtain a fifth predetermined time threshold;
an eighth judging unit, configured to judge whether the first time exceeds the fifth predetermined time threshold;
a second determination unit to determine that one of the Hall sensors is malfunctioning if the first time exceeds the predetermined time threshold.
Preferably, the apparatus comprises:
a twenty-third obtaining unit, configured to obtain operation information of the motor by an upper computer of the motor, where the operation information includes current, voltage, and temperature;
and the ninth judging unit is used for analyzing the operation information and judging whether the motor has the information of no fault in the operation process.
Preferably, the ninth judging unit includes:
the degree of dispersion J of the operation information measurement data is expressed by the following equation:
wherein a [ i ] is an ideal signal; b [ i ] is the actual signal;
a twenty-fourth obtaining unit for obtaining a predetermined threshold;
a third determination unit, configured to determine that no fault information is found in the operation process of the motor if J is greater than the predetermined threshold;
a fourth determination unit configured to determine that no undiscovered fault information has occurred in the motor during operation if J is less than the predetermined threshold.
Various changes and specific examples of the oil-gas pump motor fault detection method in the first embodiment of fig. 1 are also applicable to the oil-gas pump motor fault detection device in the present embodiment, and through the foregoing detailed description of the oil-gas pump motor fault detection method, those skilled in the art can clearly know the implementation method of the oil-gas pump motor fault detection device in the present embodiment, so for the brevity of the description, detailed description is not repeated here.
EXAMPLE III
Based on the same inventive concept as the oil and gas pump motor fault detection method in the previous embodiment, the invention also provides an oil and gas pump motor fault detection device, on which a computer program is stored, which when executed by a processor implements the steps of any one of the above-mentioned oil and gas pump motor fault detection methods.
Where in fig. 3 a bus architecture (represented by bus 300), bus 300 may include any number of interconnected buses and bridges, bus 300 linking together various circuits including one or more processors, represented by processor 302, and memory, represented by memory 304. The bus 300 may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface 306 provides an interface between the bus 300 and the receiver 301 and transmitter 303. The receiver 301 and the transmitter 303 may be the same element, i.e., a transceiver, providing a means for communicating with various other apparatus over a transmission medium.
The processor 302 is responsible for managing the bus 300 and general processing, and the memory 304 may be used for storing data used by the processor 302 in performing operations.
Example four
Based on the same inventive concept as the oil and gas pump motor fault detection method in the foregoing embodiments, the present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of:
obtaining a first predetermined current threshold;
obtaining real-time current of a motor bus;
obtaining a current fluctuation value of the motor bus according to the real-time current of the motor bus;
judging whether the fluctuation value exceeds the first preset current threshold value or not;
if the fluctuation value exceeds the first preset current threshold value, obtaining a first instruction, wherein the first instruction is used for controlling the motor to stop running and judging whether the motor is locked;
if the motor is locked, obtaining the locked-rotor time of the motor;
obtaining a first predetermined time threshold;
judging whether the motor stalling time exceeds the first preset time threshold or not;
and if the motor stalling time exceeds the first preset time threshold, obtaining a second instruction, wherein the second instruction is used for checking a motor bearing.
In a specific implementation, when the program is executed by a processor, any method step in the first embodiment may be further implemented.
One or more technical solutions in the embodiments of the present application have at least one or more of the following technical effects:
the embodiment of the application provides a method and a device for detecting the motor fault of an oil-gas pump, wherein the method comprises the following steps: obtaining a first predetermined current threshold; obtaining real-time current of a motor bus; obtaining a current fluctuation value of the motor bus according to the real-time current of the motor bus; judging whether the fluctuation value exceeds the first preset current threshold value or not; if the fluctuation value exceeds the first preset current threshold value, obtaining a first instruction, wherein the first instruction is used for controlling the motor to stop running and judging whether the motor is locked; if the motor is locked, obtaining the locked-rotor time of the motor; obtaining a first predetermined time threshold; judging whether the motor stalling time exceeds the first preset time threshold or not; and if the motor stalling time exceeds the first preset time threshold, obtaining a second instruction, wherein the second instruction is used for checking a motor bearing. The technical problem that whether the motor is locked up or not can not be judged according to the fluctuation condition of current and the motor can not be stopped in time to cause the motor damage when the motor is locked up in the oil-gas pump motor fault detection method in the prior art is solved, and the technical effects that whether the motor is locked up or not is judged according to the fluctuation condition of the motor current and the motor is stopped in time to protect the motor safety if the motor is locked up are achieved.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A method of detecting a fault in an oil and gas pump motor, the method comprising:
obtaining a first predetermined current threshold;
obtaining real-time current of a motor bus;
obtaining a current fluctuation value of the motor bus according to the real-time current of the motor bus;
judging whether the fluctuation value exceeds the first preset current threshold value or not;
if the fluctuation value exceeds the first preset current threshold value, obtaining a first instruction, wherein the first instruction is used for controlling the motor to stop running and judging whether the motor is locked;
if the motor is locked, obtaining the locked-rotor time of the motor;
obtaining a first predetermined time threshold;
judging whether the motor stalling time exceeds the first preset time threshold or not;
and if the motor stalling time exceeds the first preset time threshold, obtaining a second instruction, wherein the second instruction is used for checking a motor bearing.
2. The method of claim 1, wherein the method comprises:
obtaining motor operation information;
judging whether the motor normally operates according to the motor operation information;
if the motor cannot normally operate, obtaining a first current of the motor;
obtaining a second predetermined current threshold;
judging whether the first current exceeds the second preset current threshold value;
if the first current exceeds the second current threshold, obtaining a third instruction, wherein the third instruction is used for controlling the motor to rotate towards a first rotating direction;
and obtaining a fourth instruction, wherein the fourth instruction is used for controlling the motor to rotate towards a second rotation direction after the third instruction, and the second rotation direction and the first rotation direction are opposite rotation directions.
3. The method of claim 2, wherein the method comprises:
obtaining a third predetermined time threshold;
the motor alternately executes the third instruction and the fourth instruction by taking the third preset time threshold as a cycle;
obtaining a second predetermined time threshold;
obtaining a first running time, wherein the first running time is the time for the motor to execute the third instruction and the fourth instruction;
judging whether the first running time reaches the second preset time threshold value or not;
and if the first running time reaches the second preset time threshold, judging whether the motor is recovered to be normal.
4. The method of claim 3, wherein said determining whether the motor is back to normal comprises:
obtaining a fourth predetermined time;
obtaining a fifth instruction, wherein the fifth instruction is used for controlling the motor to execute a unidirectional operation instruction within the fourth preset threshold value;
judging whether the motor has jitter and/or noise when executing the fifth instruction;
if the motor does not have the jitter and/or the noise when executing the fifth instruction, determining that the motor can normally operate;
and if the motor does not have the jitter and/or the noise when executing the fifth command, obtaining a sixth command, wherein the sixth command is used for carrying out rotor inspection on the motor.
5. The method of claim 1, wherein the method comprises:
obtaining a first position signal;
obtaining a second position signal, wherein the second position signal and the first position signal are position signals which are adjacent to each other twice and have phase change;
obtaining a first time at which the first position signal is spaced from the second position signal;
obtaining a fifth predetermined time threshold;
judging whether the first time exceeds a fifth preset time threshold value;
and if the first time exceeds the preset time threshold, determining that one Hall sensor has a fault.
6. The method of claim 1, wherein the method comprises:
the method comprises the steps that an upper computer of the motor obtains operation information of the motor, wherein the operation information comprises current, voltage and temperature;
and analyzing the operation information, and judging whether the motor has the information of no fault in the operation process.
7. The method of claim 6, wherein the analyzing the operation information to determine whether the motor has no fault information during operation comprises:
the degree of dispersion J of the operation information measurement data is expressed by the following equation:
wherein a [ i ] is an ideal signal; b [ i ] is the actual signal;
obtaining a predetermined threshold;
if J is larger than the preset threshold value, determining that no fault information is found in the motor in the operation process;
and if J is smaller than the preset threshold value, determining that no fault information is found in the motor in the operation process.
8. An oil and gas pump motor fault detection device, characterized in that the device includes:
a first obtaining unit for obtaining a first predetermined current threshold;
the second obtaining unit is used for obtaining real-time current of a motor bus;
the third obtaining unit is used for obtaining a current fluctuation value of the motor bus according to the real-time current of the motor bus;
a first judgment unit for judging whether the fluctuation value exceeds the first predetermined current threshold;
a fourth obtaining unit, configured to obtain a first instruction if the fluctuation value exceeds the first predetermined current threshold, where the first instruction is used to control the motor to stop operating and determine whether the motor is locked;
a fifth obtaining unit, configured to obtain a motor stalling time if the motor stalls;
a sixth obtaining unit configured to obtain a first predetermined time threshold;
a second judging unit, configured to judge whether the motor stalling time exceeds the first predetermined time threshold;
a seventh obtaining unit, configured to obtain a second instruction if the motor stalling time exceeds the first predetermined time threshold, where the second instruction is used to check a motor bearing.
9. An oil and gas pump motor fault detection device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the program implements the steps of the method of any one of claims 1 to 7.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 7.
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| CN202010546823.XA CN111751722B (en) | 2020-06-16 | 2020-06-16 | Oil-gas pump motor fault detection method and device |
| PCT/CN2020/138994 WO2021253781A1 (en) | 2020-06-16 | 2020-12-24 | Fault detection method and apparatus for oil-gas pump electric motor |
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| CN202010546823.XA CN111751722B (en) | 2020-06-16 | 2020-06-16 | Oil-gas pump motor fault detection method and device |
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| CN111751722B CN111751722B (en) | 2022-02-01 |
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| WO2021253781A1 (en) * | 2020-06-16 | 2021-12-23 | 苏州大学 | Fault detection method and apparatus for oil-gas pump electric motor |
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| CN116776074B (en) * | 2023-08-21 | 2024-01-02 | 威晟汽车科技(宁波)有限公司 | Method and device for identifying locked rotor of electronic water pump |
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| WO2021253781A1 (en) | 2021-12-23 |
| CN111751722B (en) | 2022-02-01 |
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