CN112865021B - Motor protection method, device, equipment and storage medium - Google Patents
Motor protection method, device, equipment and storage medium Download PDFInfo
- Publication number
- CN112865021B CN112865021B CN202011644910.5A CN202011644910A CN112865021B CN 112865021 B CN112865021 B CN 112865021B CN 202011644910 A CN202011644910 A CN 202011644910A CN 112865021 B CN112865021 B CN 112865021B
- Authority
- CN
- China
- Prior art keywords
- value
- current
- sampling
- motor
- adc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
Landscapes
- Control Of Electric Motors In General (AREA)
Abstract
The invention relates to the technical field of motors of intelligent cake making machines or intelligent dough making machines, and discloses a motor protection method, a device, equipment and a storage medium, wherein the method comprises the following steps: sampling the running parameters of the motor in real time to obtain the current running parameters; reading a sampling current value and/or a sampling rotating speed value from the current operation parameter; determining the running state of the motor according to the sampling current value and/or the sampling rotating speed value; when the running state of the motor is abnormal, the early warning signal is output, because the running parameter of the motor is sampled in real time, the sampling current value and/or the sampling rotating speed value are/is obtained according to the running parameter, the running state of the motor is determined according to the sampling current value and/or the sampling rotating speed value, and whether the early warning information is output or not is determined according to the judgment result after the running state of the motor is judged, the monitoring accuracy of the running state of the motor is improved, and the motor is protected better.
Description
Technical Field
The invention relates to the technical field of motors of intelligent cake making machines or intelligent dough making machines, in particular to a motor protection method, a device, equipment and a storage medium.
Background
Along with the more and more use of the motor in daily production and life, the motor may cause the invalid coil burning of the motor, belt burning, damage to the motor and a motor gear shaft and the like due to the blocking of the motor and the slipping of a transmission mechanism, so that not only can great economic loss be caused, but also safety production accidents can be caused, and serious consequences are caused, therefore, the monitoring of the running state of the motor is important for timely finding out abnormal conditions and taking corresponding countermeasures.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a motor protection method, a motor protection device, motor protection equipment and a storage medium, and aims to solve the technical problem that the running state of a motor cannot be accurately monitored in the prior art.
In order to achieve the above object, the present invention provides a motor protection method, including the steps of:
sampling the running parameters of the motor in real time to obtain the current running parameters;
reading a sampling current value and/or a sampling rotating speed value from the current operation parameter;
determining the running state of the motor according to the sampling current value and/or the sampling rotating speed value;
and when the running state of the motor is abnormal, outputting an early warning signal.
Optionally, the determining the operation state of the motor according to the sampled current value and/or the sampled rotation speed value specifically includes:
acquiring a sampling current ADC value of the motor in a standby state from the sampling current value to obtain a standby sampling current ADC value;
determining a machine characteristic sampling current ADC reference value of the motor according to a preset recursive algorithm and the standby sampling current ADC value;
acquiring a sampling current ADC value under the motor load state according to the sampling current value to obtain a load sampling current ADC value;
determining the actual working current value of the motor according to the machine characteristic sampling current ADC reference value and the load sampling current ADC value;
and determining the running state of the motor according to the actual working current value and/or the sampling rotating speed value.
Optionally, the determining an actual working current value of the motor according to the machine characteristic sampling current ADC reference value and the load sampling current ADC value specifically includes:
in the current timing period, when detecting that the data sampling operation is triggered, acquiring a preset number of load sampling current ADC values;
constructing a current ADC value array according to the load sampling current ADC values of the preset number, and acquiring a current ADC mean value corresponding to the current ADC value array;
continuously detecting whether the data sampling operation is triggered;
if so, adding the current ADC mean value into a current ADC value array corresponding to the next triggered data sampling operation;
acquiring the current ADC mean value of the current ADC value array added with the current ADC mean value, and detecting whether the current timing period is finished;
if so, taking the current ADC mean value as a load current ADC value of the motor;
if not, returning to the step of continuously detecting whether the data sampling operation is triggered or not, and taking the current ADC mean value obtained at the end of the current timing period as a load current ADC value;
and determining the actual working current value of the motor according to the machine characteristic sampling current ADC reference value and the load current ADC value.
Optionally, the operating state includes an over-current shutdown and a no-current shutdown:
determining the actual working current value of the motor according to the difference value of the machine characteristic sampling current reference ADC value and the load current ADC value;
accumulating the times that the actual working current value is greater than a preset threshold current in a first preset period to obtain first current abnormal times;
and when the first current abnormal frequency is greater than a first preset threshold value, judging that the running state of the motor is overcurrent shutdown.
Optionally, after the step of determining the actual operating current value of the motor according to the difference between the machine characteristic sampled current reference ADC value and the load current ADC value, the method further comprises:
accumulating the times of the actual working current value falling in a preset current interval in a second preset period to obtain second current abnormal times;
and when the second current abnormal times is larger than a second preset threshold value, judging that the running state of the motor is a currentless shutdown.
Optionally, the operating state further comprises a rotational speed anomaly:
obtaining a motor rotating speed sampling value and a belt wheel rotating speed sampling value according to the rotating speed sampling value;
when the sampled rotating speed value of the rotating speed of the motor is smaller than a preset rotating speed threshold value, entering a motor rotating speed abnormity judgment mode;
when entering a motor rotating speed abnormity judging mode, accumulating the times that the motor sampling rotating speed value is smaller than a preset rotating speed threshold value within a preset time to obtain the rotating speed abnormity times;
judging whether the abnormal times of the rotating speed are larger than a preset time threshold value or not;
if so, judging that the running state of the motor is abnormal in rotating speed;
if not, the motor rotating speed abnormity judging mode is exited.
Optionally, after the step of entering the abnormal motor rotation speed determination mode when the sampled motor rotation speed value is smaller than the preset rotation speed threshold, the method further includes:
when entering a motor rotating speed abnormity judging mode, determining a rotating speed ratio according to the motor rotating speed sampling value and the belt wheel rotating speed sampling value;
and when the rotating speed ratio is not consistent with the preset rotating speed ratio, judging that the running state of the motor is abnormal rotating speed.
In addition, in order to achieve the above object, the present invention also provides a motor protection device, including:
a sampling module: the system comprises a sampling module, a data processing module and a data processing module, wherein the sampling module is used for sampling the operation parameters of a motor in real time to obtain the current operation parameters;
a reading module: the sampling circuit is used for reading a sampling current value and/or a sampling rotating speed value from the current operating parameter;
a determination module: the motor control device is used for determining the running state of the motor according to the sampling current value and/or the sampling rotating speed value;
an output module: and the motor is used for outputting an early warning signal when the running state of the motor is abnormal.
In addition, to achieve the above object, the present invention also provides a motor protection apparatus, including: a memory, a processor and a motor protection program stored on the memory and executable on the processor, the motor protection program configured to implement the steps of the motor protection method as described above.
In addition, to achieve the above object, the present invention further provides a storage medium having a motor protection program stored thereon, wherein the motor protection program, when executed by a processor, implements the steps of the motor protection method as described above.
The method comprises the steps of sampling the running parameters of the motor in real time to obtain the current running parameters; reading a sampling current value and/or a sampling rotating speed value from the current operation parameter; determining the running state of the motor according to the sampling current value and/or the sampling rotating speed value; when the running state of the motor is abnormal, the invention outputs the early warning signal, because the invention samples the running parameter of the motor in real time, acquiring a sampling current value and/or a sampling rotating speed value according to the operating parameters, judging the operating state of the motor according to the sampling current value and/or the sampling rotating speed value, then, after the running state of the motor is judged, whether the early warning information is output or not is determined according to the judgment result, the monitoring accuracy of the running state of the motor is improved, thereby people do not need to select the motor with the performance exceeding the current use scene, the motor can be ensured to work in the optimal state, the phenomena that the motor is ineffective to burn coils and belts, damage to the motor and a motor gear shaft and the like caused by the motor rotation blocking and the transmission mechanism slipping are avoided, thereby improving the stability of the cake making machine and the dough making machine during working and ensuring the service life of the motor and the equipment.
Drawings
Fig. 1 is a schematic structural diagram of a motor protection device in a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating a first embodiment of a motor protection method according to the present invention;
FIG. 3 is a schematic flow chart illustrating a motor protection method according to a second embodiment of the present invention;
FIG. 4 is a schematic flow chart illustrating a motor protection method according to a third embodiment of the present invention;
FIG. 5 is a schematic flow chart illustrating a motor protection method according to a fourth embodiment of the present invention;
fig. 6 is a block diagram showing the structure of the first embodiment of the motor protection device of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a motor protection device in a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the motor protection apparatus may include: a processor 1001, such as a Central Processing Unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a WIreless interface (e.g., a WIreless-FIdelity (WI-FI) interface). The Memory 1005 may be a Random Access Memory (RAM) Memory, or a Non-Volatile Memory (NVM), such as a disk Memory. The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the configuration shown in fig. 1 does not constitute a limitation of the motor protection device and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a storage medium, may include therein an operating system, a data storage module, a network communication module, a user interface module, and a motor protection program.
In the motor protection apparatus shown in fig. 1, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 of the motor protection device of the present invention may be provided in the motor protection device, and the motor protection device calls the motor protection program stored in the memory 1005 through the processor 1001 and executes the motor protection method provided by the embodiment of the present invention.
An embodiment of the present invention provides a motor protection method, and referring to fig. 2, fig. 2 is a schematic flow diagram of a first embodiment of the motor protection method according to the present invention.
In this embodiment, the motor protection method includes the following steps:
step S10: sampling the running parameters of the motor in real time to obtain the current running parameters;
it should be noted that the execution main body of this embodiment is a motor operation state monitoring device, the motor operation device may sample operation parameters of the motor in real time during the operation of the motor, and convert the acquired analog signal into a digital signal through the conversion circuit, and the sampling mode may be ADC sampling, hall pulse sampling, or other sampling modes, which is not limited in this embodiment.
It should be understood that the motor may be a stirring motor of a cake making machine, a stirring motor of a dough making machine, or other motors, and the embodiment is not limited thereto.
The operation parameters of the motor may be voltage, rotation speed, current, frequency, etc. during the operation of the motor, which is not limited in this embodiment.
It should be understood that, the current operating parameters such as the sampling current value, the sampling rotation speed value, the sampling frequency, etc. can be obtained by sampling the operating parameters of the motor in real time, which is not limited in this embodiment.
Step S20: reading a sampling current value and/or a sampling rotating speed value from the current operation parameter;
it should be understood that the current operating parameter includes a sampling current value, a sampling rotation speed value, a sampling frequency, and the like, and thus the sampling current value and/or the sampling rotation speed value can be read from the current operating parameter.
Step S30: determining the running state of the motor according to the sampling current value and/or the sampling rotating speed value;
it can be understood that when the motor running state is abnormal, the voltage value and/or the rotating speed value of the motor will change correspondingly, so that the running state of the motor can be determined according to the sampled current value and/or the sampled rotating speed value of the motor.
Further, in order to improve the accuracy of monitoring the operating state of the motor, the step S30 specifically includes:
step S301: acquiring a sampling current ADC value of the motor in a standby state from the sampling current value to obtain a standby sampling current ADC value;
it should be understood that the sampling current ADC value in the standby state is a sampling current ADC value when the motor does not drive a load in the non-operating state, and the sampling current ADC value in the standby state of the motor can be obtained from the sampling current ADC value of the motor;
step S302: determining a machine characteristic sampling current ADC reference value of the motor according to a preset recursive algorithm and the standby sampling current ADC value;
it should be understood that, according to the standby sampling current ADC value, a mean value of the standby sampling current ADC value may be obtained by using a preset recursive algorithm, and the mean value of the standby sampling current ADC value is used as a reference ADC value for the machine sampling current characteristic of the motor, and it should be understood that a mapping relation table is maintained in a memory of the motor operation state monitoring device, and the mapping relation between the sampling current value and the sampling current ADC value may be obtained by reading the mapping relation table.
Step S303: acquiring a sampling current ADC value under the motor load state according to the sampling current value to obtain a load sampling current ADC value;
it should be understood that the load sampling current ADC value is a sampling current ADC value when the motor drives the load to operate in the operating state, and the load sampling current ADC value of the motor may be obtained from the sampling current ADC value of the motor.
Step S304: determining the actual working current value of the motor according to the machine characteristic sampling current ADC reference value and the load sampling current ADC value;
it should be understood that the load current ADC value may be determined according to a preset rule based on the load sampling current ADC value, and the actual operating current value may be determined according to a preset rule based on the load current ADC value and the machine sampling current characteristic reference ADC value.
Step S305: and determining the running state of the motor according to the actual working current value and/or the sampling rotating speed value.
It can be understood that when the motor running state is abnormal, the actual working current value and/or the rotating speed value of the motor will change correspondingly, so that the running state of the motor can be determined according to the actual working current value and/or the sampling rotating speed value of the motor.
Step S40: and when the running state of the motor is abnormal, outputting an early warning signal.
It should be understood that the motor protection device can judge whether the running state of the motor is abnormal or not and output an early warning signal when the running state of the motor is abnormal.
It should be understood that when the operation state of the motor is overcurrent shutdown, no-current shutdown and/or abnormal rotation speed, the motor protection device determines that the operation state of the motor is abnormal operation and outputs an early warning signal.
The embodiment samples the running parameters of the motor in real time to obtain the current running parameters; reading a sampling current value and/or a sampling rotating speed value from the current operation parameter; determining the running state of the motor according to the sampling current value and/or the sampling rotating speed value; when the running state of the motor is abnormal, the early warning signal is output, because the embodiment samples the running parameters of the motor in real time, acquiring a sampling current value and/or a sampling rotating speed value according to the operating parameters, judging the operating state of the motor according to the sampling current value and/or the sampling rotating speed value, after the running state of the motor is judged, whether the early warning information is output or not is determined according to the judgment result, the monitoring accuracy of the running state of the motor is improved, the motor is protected better, further, the characteristic sampling current reference ADC value of the motor is introduced, the influence of difference, unstable power supply voltage (such as voltage mutation) or other conditions on the monitoring of the running state of the motor can be filtered, so that the motor can be used in different scenes, the running state of the motor can be accurately monitored, and the motor can meet different use scenes.
Referring to fig. 3, fig. 3 is a schematic flow chart of a motor protection method according to a second embodiment of the present invention.
Based on the first embodiment, in this embodiment, the step S304 includes:
step S3041: in the current timing period, when detecting that the data sampling operation is triggered, acquiring a preset number of load sampling current ADC values;
it should be understood that the condition that the data sampling operation is triggered may be triggered by a rising zero-crossing edge of the ac signal, a falling zero-crossing edge of the ac signal, or other triggering conditions, and the preset number of load voltage values may be sampled at equal time intervals with a delay of a period of time when the data sampling is triggered, which is not limited in this embodiment.
In particular implementations, for example: setting a timing period to be 2S, delaying for 5ms in 2S when detecting that the alternating current signal is a zero-crossing rising edge every time, and acquiring 4 current ADC values at an interval of 0.2ms to obtain load sampling current ADC values.
Step S3042: constructing a current ADC value array according to the load sampling current ADC values of the preset number, and acquiring a current ADC mean value corresponding to the current ADC value array;
it should be understood that the collected load current ADC value may be used as an element of the current ADC value array, and a current ADC mean value corresponding to the current ADC value array is obtained according to a certain rule, for example: the voltage value array has 4 current ADC value elements, the maximum value and the minimum value are removed, the average value of the remaining two current ADC value elements is calculated, and the current ADC average value corresponding to the current ADC value array is obtained.
Step S3043: continuously detecting whether the data sampling operation is triggered;
it should be understood that the motor protection device may continuously detect whether the sampling operation is triggered.
Step S3044: if so, adding the current ADC mean value into a current ADC value array corresponding to the next triggered data sampling operation;
it should be understood that when the sampling operation is triggered again, the current ADC average value obtained from the current ADC value data last time is added to the current ADC value array this time.
Step S3045: acquiring the current ADC mean value of the current ADC value array added with the current ADC mean value, and detecting whether the current timing period is finished;
in particular implementations, for example: and triggering the sampling operation again, acquiring 4 current ADC values according to a certain rule, obtaining a current ADC value array with 4 current ADC value elements, adding the current ADC average value obtained last time into the current data, removing the maximum value and the minimum value of 5 elements in the current ADC value array, solving the average value of the remaining 3 current ADC value elements, and obtaining the current ADC average value corresponding to the current ADC value array.
Step S3046: if so, taking the current ADC mean value as a load current ADC value of the motor;
it should be understood that at the end of the current timing period, the current ADC average is taken as the load current ADC value for the motor.
If not, returning to the step of continuously detecting whether the data sampling operation is triggered or not, and taking the average value of the current ADC obtained at the end of the current timing period as a load current ADC value;
it should be understood that, when the current timing cycle is not ended, the process returns to step S3043 until the timing cycle is ended, and the current ADC of the current ADC value group obtained at the end of the timing cycle is used as the load current ADC value of the motor.
Step S3048: and determining the actual working current value of the motor according to the machine characteristic sampling current ADC reference value and the load current ADC value.
It can be understood that the current ADC value corresponding to the actual working current value of the motor can be obtained by subtracting the load current ADC value of the motor from the machine sampling current characteristic reference ADC value of the motor, a mapping table is maintained in the memory of the motor operation state monitoring device, and the correspondence between the current ADC mean value and the actual current value can be obtained by reading the mapping table.
To facilitate understanding of the present embodiment, the following examples are given: setting a timing period as 2S, in 2S, when the alternating current signal is detected to be a zero-crossing rising edge for the first time, delaying for 5ms, collecting 4 current ADC values as 218, 220 and 222 at an interval of 0.2ms to obtain an array of 4 element current ADC values, removing a maximum value 222 and a minimum value 218, obtaining a mean value 220 of the remaining two elements, when the alternating current signal is detected to be the zero-crossing rising edge for the second time, delaying for 5ms, collecting 4 current ADC values as 218, 220 and 222 at an interval of 0.2ms to obtain an array of 4 element current ADC values, adding the mean value 220 obtained for the first time into the array, removing the maximum value 222 and the minimum value 218 to obtain a current ADC mean value 220 corresponding to the current ADC value obtained for the second time, and so on, obtaining a third current ADC mean value until the timing period is ended, taking the current ADC mean value obtained at the end of the timing period as a load current ADC value, the actual working current value of the motor can be obtained by subtracting the load current ADC value of the motor from the machine sampling current characteristic reference ADC value of the motor and reading a mapping relation table in a memory of the motor running state monitoring device.
In the embodiment, a plurality of groups of load sampling current ADC values are collected in a certain timing period to construct a current ADC value array, the load current ADC value corresponding to the current ADC mean value is obtained by reading the mapping relation table, and the actual working current value is determined according to the machine sampling current characteristic reference ADC value and the load current ADC value, so that the influence of instability of mains supply voltage and hardware difference on determination of the actual working current value can be reduced, and the accuracy of monitoring the running state of the motor can be improved.
Referring to fig. 4, fig. 4 is a schematic flow chart of a motor protection method according to a third embodiment of the present invention.
Based on the above embodiments, in this embodiment, the operation state includes an overcurrent shutdown and a currentless shutdown:
step S3051: determining the actual working current value of the motor according to the difference value of the machine characteristic sampling current reference ADC value and the load current ADC value;
it can be understood that a mapping relation table of the actual working current value ADC value and the actual working current value is maintained in a memory of the motor operation state monitoring device, and in the mapping relation table, the actual working current value ADC value and the actual working current value are in one-to-one correspondence, so that the relation between the actual working current value ADC value and the actual working current value in the mapping relation table can be read, and the actual working current value is obtained according to the actual working current value ADC value.
Step S3052: accumulating the times that the actual working current value is greater than a preset threshold current in a first preset period to obtain first current abnormal times;
it should be understood that the first predetermined period is a determination period, and the number of times of current abnormality is accumulated in the determination period to obtain the first current abnormality number.
In particular implementations, for example: the first preset period is 5S, the preset threshold current is 0.6A, and within 5S, if the current greater than 0.6A is 5 times, the first current abnormal time is 5.
S3053: and when the first current abnormal frequency is greater than a first preset threshold value, judging that the running state of the motor is overcurrent shutdown.
In particular implementations, for example: the first current abnormal frequency is 5, the first preset threshold is 4, and at this time, it is determined that the running state of the motor is overcurrent shutdown.
Further, in order to improve the accuracy of monitoring the running state of the motor, after the step of using the difference value between the machine characteristic sampling current reference ADC value and the load current value as the actual operating current value, the method further includes: accumulating the times of the actual working current value falling in a preset current interval in a second preset period to obtain second current abnormal times; and when the second current abnormal times is larger than a second preset threshold value, judging that the running state of the motor is a currentless shutdown.
In particular implementations, for example: the second preset period is 5S, the preset current interval is (-3,0.5), in 5S, the number of times that the current is in the interval (-3,0.5) at 5S is 6, the first current abnormal number is 6, and if the second preset threshold is 5, the operation state of the motor is judged to be a currentless stop state.
The running state of the motor is determined by judging whether the number of times of the abnormal current in the preset period is greater than the preset threshold value, so that the monitoring accuracy of the running state of the motor is further improved.
Based on the above embodiments, a fourth embodiment of the motor protection method of the present invention is provided.
In this embodiment, the operating state further includes rotational speed abnormality:
step 30511: obtaining a motor rotating speed sampling value and a belt wheel rotating speed sampling value according to the rotating speed sampling value;
step S30512: when the sampled rotating speed value of the rotating speed of the motor is smaller than a preset rotating speed threshold value, entering a motor rotating speed abnormity judgment mode;
it should be understood that a rotation speed value may be set as a preset rotation speed threshold, and when the collected sampling rotation speed value is smaller than the set preset rotation speed threshold, the rotation speed abnormality determination mode is entered.
Step S30513: when entering a motor rotating speed abnormity judging mode, accumulating the times that the motor sampling rotating speed value is smaller than a preset rotating speed threshold value within a preset time to obtain rotating speed abnormity times;
in particular implementations, for example: the current sampling rotating speed value of the motor is 2000, a rotating speed threshold value 2200 is preset, because 2000 is smaller than 2200, a rotating speed abnormity judging mode is entered, the preset time is 3S, the number of times that the sampling rotating speed value is smaller than 2200 in 3S is 15, and the number of times of rotating speed abnormity is 15.
Step S30514: judging whether the abnormal times of the rotating speed are larger than a preset time threshold value or not;
step S30515: if so, judging that the running state of the motor is abnormal in rotating speed;
step S30516: if not, the motor rotating speed abnormity judging mode is exited.
In particular implementations, for example: the current sampling rotation speed value of the motor is 2000, a rotation speed threshold value 2200 is preset, because 2000 is smaller than 2200, a rotation speed abnormity judgment mode is entered, the preset time is 3S, the number of times that the sampling rotation speed value is smaller than 2200 in 3S is 15, the number of times of rotation speed abnormity is 15, if the preset number of times threshold value is 13, and the operation state of the motor is judged to be rotation speed abnormity because 15 is larger than 13; and if the number of times that the sampling rotating speed value is less than 2200 in 3S is 11, the rotating speed abnormity number is 11, if 11 is less than 13, the rotating speed abnormity judging mode is exited, and if the rotating speed abnormity judging mode is exited, the sampling rotating speed data is cleared, and the memory is released.
Further, in order to improve the accuracy of monitoring the operation state of the motor, after the step S30512, the method further includes:
when entering a motor rotating speed abnormity judging mode, determining a rotating speed ratio according to the motor rotating speed sampling value and the belt wheel rotating speed sampling value; and when the rotating speed ratio is not consistent with the preset rotating speed ratio, judging that the running state of the motor is abnormal rotating speed.
It can be understood that the rotating speed ratio is obtained by dividing the rotating speed sampling value of the motor by the rotating speed sampling value of the belt wheel, when the motor normally operates, the rotating speed ratio is a constant value, the preset rotating speed ratio can be set when the motor leaves a factory, and the preset rotating speed ratio can also be adjusted according to actual conditions in the use process.
In particular implementations, for example: the preset rotating speed ratio is 8, in the actual working process, the rotating speed sampling value of the motor is 7000RPM, the rotating speed sampling value of the belt wheel is 200RPM, and at the moment, the rotating speed ratio is 35 and is inconsistent with the preset rotating speed ratio 8, the abnormal rotation of the motor belt wheel is judged.
The rotating speed abnormity judging mode is entered when the sampling rotating speed value is smaller than the preset rotating speed threshold value, and when the number of times that the motor rotating speed sampling value is smaller than the preset threshold value in the preset time is larger than the preset number of times or the ratio of the motor rotating speed sampling value to the belt wheel rotating speed sampling value is inconsistent, the running state of the motor is judged to be abnormal in rotating speed, so that the monitoring accuracy of the running state of the motor is further improved.
In addition, an embodiment of the present invention further provides a storage medium, where a motor protection program is stored on the storage medium, and the motor protection program, when executed by a processor, implements the steps of the motor protection method described above.
Referring to fig. 5, fig. 5 is a block diagram illustrating a first embodiment of the motor protection device according to the present invention.
As shown in fig. 5, a motor protection device according to an embodiment of the present invention includes: the device comprises a sampling module 10, a reading module 20, a determining module 30 and an output module 40.
The sampling module 10: the system comprises a sampling module, a data processing module and a data processing module, wherein the sampling module is used for sampling the operation parameters of a motor in real time to obtain the current operation parameters;
the reading module 20: the sampling circuit is used for reading a sampling current value and/or a sampling rotating speed value from the current operating parameter;
the determination module 30: the sampling current value and/or the sampling rotating speed value are/is used for determining the running state of the motor;
the output module 40: and the motor is used for outputting an early warning signal when the running state of the motor is abnormal.
In the embodiment, the sampling module 10 is used for sampling the running parameters of the motor in real time to obtain the current running parameters; the reading module 20 reads a sampling current value and/or a sampling rotating speed value from the current operation parameter; the determination module 30: the output module 40: determining the running state of the motor according to the sampling current value and/or the sampling rotating speed value; when the running state of the motor is abnormal, the early warning signal is output, because the running parameter of the motor is sampled in real time, the sampling current value and/or the sampling rotating speed value are/is obtained according to the running parameter, the running state of the motor is determined according to the sampling current value and/or the sampling rotating speed value, and whether the early warning information is output or not is determined according to the judgment result after the running state of the motor is judged, the monitoring accuracy of the running state of the motor is improved, and the motor is protected better.
Further, in order to improve the accuracy of monitoring the running state of the motor, the determining module 30 is further configured to obtain a sampling current ADC value of the motor in a standby state from the sampling current value, so as to obtain a standby sampling current ADC value; determining a machine characteristic sampling current ADC reference value of the motor according to a preset recursive algorithm and the standby sampling current ADC value; acquiring a sampling current ADC value under the motor load state according to the sampling current value to obtain a load sampling current ADC value; determining the actual working current value of the motor according to the machine characteristic sampling current ADC reference value and the load sampling current ADC value; and determining the running state of the motor according to the actual working current value and/or the sampling rotating speed value.
Further, in order to improve the accuracy of monitoring the running state of the motor, the determining module 30 is further configured to collect a preset number of load sampling current ADC values when detecting that the data sampling operation is triggered in the current timing cycle; constructing a current ADC value array according to the load sampling current ADC values of the preset number, and acquiring a current ADC mean value corresponding to the current ADC value array; continuously detecting whether the data sampling operation is triggered; if so, adding the current ADC mean value into a current ADC value array corresponding to the next triggered data sampling operation; acquiring the current ADC mean value of the current ADC value array added with the current ADC mean value, and detecting whether the current timing period is finished; if so, taking the current ADC mean value as a load current ADC value of the motor; if not, returning to the step of continuously detecting whether the data sampling operation is triggered or not, and taking the current ADC mean value obtained at the end of the current timing period as a load current ADC value; and determining the actual working current value of the motor according to the machine characteristic sampling current ADC reference value and the load current ADC value.
Further, in order to improve the accuracy of monitoring the running state of the motor, the determining module 30 is further configured to determine an actual working current value of the motor according to a difference between the machine characteristic sampling current reference ADC value and the load current ADC value; accumulating the times that the actual working current value is greater than a preset threshold current in a first preset period to obtain first current abnormal times; and when the first current abnormal frequency is greater than a first preset threshold value, judging that the running state of the motor is overcurrent shutdown.
Further, in order to improve the accuracy of monitoring the running state of the motor, the determining module 30 is further configured to accumulate the number of times that the actual working current value falls within a preset current interval in a second preset period, so as to obtain a second current abnormal number; and when the second current abnormal times is larger than a second preset threshold value, judging that the running state of the motor is a currentless shutdown.
Further, in order to improve the accuracy of monitoring the running state of the motor, the determining module 30 is further configured to obtain a motor rotation speed sampling value and a pulley rotation speed sampling value according to the rotation speed sampling value; when the sampled rotating speed value of the rotating speed of the motor is smaller than a preset rotating speed threshold value, entering a motor rotating speed abnormity judgment mode; when entering a motor rotating speed abnormity judging mode, accumulating the times that the motor sampling rotating speed value is smaller than a preset rotating speed threshold value within a preset time to obtain rotating speed abnormity times; judging whether the abnormal times of the rotating speed are larger than a preset time threshold value or not; if so, judging that the running state of the motor is abnormal in rotating speed; if not, the motor rotating speed abnormity judging mode is exited.
Further, in order to improve the accuracy of monitoring the running state of the motor, the output module 30 is further configured to determine a rotation speed ratio according to the motor rotation speed sampling value and the pulley rotation speed sampling value when entering a motor rotation speed abnormality determination mode; and when the rotating speed ratio is not consistent with the preset rotating speed ratio, judging that the running state of the motor is abnormal rotating speed.
Other embodiments or specific implementation manners of the motor protection device of the present invention may refer to the above method embodiments, and are not described herein again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system 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 system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., a rom/ram, a magnetic disk, an optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. A method of protecting a motor, the method comprising:
sampling the running parameters of the motor in real time to obtain the current running parameters;
reading a sampling current value and/or a sampling rotating speed value from the current operation parameter;
determining the running state of the motor according to the sampling current value and/or the sampling rotating speed value;
when the running state of the motor is abnormal, outputting an early warning signal;
the determining the running state of the motor according to the sampling current value and/or the sampling rotating speed value specifically comprises:
acquiring a sampling current ADC value of the motor in a standby state from the sampling current value to obtain a standby sampling current ADC value;
determining a machine characteristic sampling current ADC reference value of the motor according to a preset recursive algorithm and the standby sampling current ADC value;
acquiring a sampling current ADC value under the motor load state according to the sampling current value to obtain a load sampling current ADC value;
determining the actual working current value of the motor according to the machine characteristic sampling current ADC reference value and the load sampling current ADC value;
determining the running state of the motor according to the actual working current value and/or the sampling rotating speed value;
the determining of the machine characteristic sampling current ADC reference value of the motor according to the preset recursion algorithm and the standby sampling current ADC value includes:
determining the mean value of the ADC value according to the ADC value of the standby sampling current by using a preset recursive algorithm, and setting the mean value of the ADC value of the standby sampling current as a reference value of the ADC of the machine characteristic sampling current;
the determining the actual working current value of the motor according to the machine characteristic sampling current ADC reference value and the load sampling current ADC value specifically comprises:
in the current timing period, when detecting that the data sampling operation is triggered, acquiring a preset number of load sampling current ADC values;
constructing a current ADC value array according to the load sampling current ADC values of the preset number, and acquiring a current ADC mean value corresponding to the current ADC value array;
continuously detecting whether the data sampling operation is triggered;
if so, adding the current ADC mean value into a current ADC value array corresponding to the next triggered data sampling operation;
acquiring the current ADC mean value of the current ADC value array added with the current ADC mean value, and detecting whether the current timing period is finished;
if so, taking the current ADC mean value as a load current ADC value of the motor;
if not, returning to the step of continuously detecting whether the data sampling operation is triggered or not, and taking the current ADC mean value obtained at the end of the current timing period as a load current ADC value;
and determining the actual working current value of the motor according to the machine characteristic sampling current ADC reference value and the load current ADC value.
2. The method of claim 1, wherein the operational states include an over-current shutdown and a no-current shutdown:
determining the actual working current value of the motor according to the difference value of the machine characteristic sampling current reference ADC value and the load current ADC value;
accumulating the times that the actual working current value is greater than a preset threshold current in a first preset period to obtain first current abnormal times;
and when the first current abnormal frequency is greater than a first preset threshold value, judging that the running state of the motor is overcurrent shutdown.
3. The method of claim 2, wherein after the step of determining the actual operating current value of the motor based on the difference between the machine characteristic sampled current reference ADC value and the load current ADC value, the method further comprises:
accumulating the times of the actual working current value falling in a preset current interval in a second preset period to obtain second current abnormal times;
and when the second current abnormal times is larger than a second preset threshold value, judging that the running state of the motor is a currentless shutdown.
4. The method of claim 1, wherein the operating condition further comprises a rotational speed anomaly:
obtaining a motor rotating speed sampling value and a belt wheel rotating speed sampling value according to the sampling rotating speed value;
when the sampled rotating speed value of the rotating speed of the motor is smaller than a preset rotating speed threshold value, entering a motor rotating speed abnormity judgment mode;
when entering a motor rotating speed abnormity judging mode, accumulating the times that the motor sampling rotating speed value is smaller than a preset rotating speed threshold value within a preset time to obtain rotating speed abnormity times;
judging whether the number of times of abnormal rotation speed is larger than a preset number threshold value or not;
if so, judging that the running state of the motor is abnormal in rotating speed;
if not, the motor rotating speed abnormity judgment mode is exited.
5. The method of claim 4, wherein after entering the motor speed abnormality determination mode when the motor speed sampling speed value is less than the preset speed threshold value, the method further comprises:
when entering a motor rotating speed abnormity judging mode, determining a rotating speed ratio according to the motor rotating speed sampling value and the belt wheel rotating speed sampling value;
and when the rotating speed ratio is not consistent with the preset rotating speed ratio, judging that the running state of the motor is abnormal rotating speed.
6. A motor protection device, the device comprising:
a sampling module: the system comprises a sampling module, a data processing module and a data processing module, wherein the sampling module is used for sampling the operation parameters of a motor in real time to obtain the current operation parameters;
a reading module: the sampling circuit is used for reading a sampling current value and/or a sampling rotating speed value from the current operating parameter;
a determination module: the motor control device is used for determining the running state of the motor according to the sampling current value and/or the sampling rotating speed value;
an output module: the motor is used for outputting an early warning signal when the running state of the motor is abnormal;
the determination module is further configured to obtain a sampling current ADC value of the motor in a standby state from the sampling current value to obtain a standby sampling current ADC value; determining a machine characteristic sampling current ADC reference value of the motor according to a preset recursive algorithm and the standby sampling current ADC value; acquiring a sampling current ADC value under the motor load state according to the sampling current value to obtain a load sampling current ADC value; determining the actual working current value of the motor according to the machine characteristic sampling current ADC reference value and the load sampling current ADC value; determining the running state of the motor according to the actual working current value and/or the sampling rotating speed value;
the determination module is further configured to determine a mean value of the standby sampling current ADC values according to the standby sampling current ADC values by using a preset recursive algorithm, and set the mean value of the standby sampling current ADC values as a machine characteristic sampling current ADC reference value;
the determining module is further configured to collect a preset number of load sampling current ADC values when detecting that a data sampling operation is triggered in a current timing period; constructing a current ADC value array according to the load sampling current ADC values of the preset number, and acquiring a current ADC mean value corresponding to the current ADC value array; continuously detecting whether the data sampling operation is triggered; if so, adding the current ADC mean value into a current ADC value array corresponding to the next triggered data sampling operation; acquiring the current ADC mean value of the current ADC value array added with the current ADC mean value, and detecting whether the current timing period is finished; if so, taking the current ADC mean value as a load current ADC value of the motor; if not, returning to the step of continuously detecting whether the data sampling operation is triggered or not, and taking the current ADC mean value obtained at the end of the current timing period as a load current ADC value; and determining the actual working current value of the motor according to the machine characteristic sampling current ADC reference value and the load current ADC value.
7. An electric motor protection apparatus, characterized in that the apparatus comprises: memory, a processor and a motor protection program stored on the memory and executable on the processor, the motor protection program being configured to implement the steps of the motor protection method according to any of claims 1 to 5.
8. A storage medium, characterized in that the storage medium has stored thereon a motor protection program which, when executed by a processor, implements the steps of the motor protection method according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011644910.5A CN112865021B (en) | 2020-12-31 | 2020-12-31 | Motor protection method, device, equipment and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011644910.5A CN112865021B (en) | 2020-12-31 | 2020-12-31 | Motor protection method, device, equipment and storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112865021A CN112865021A (en) | 2021-05-28 |
| CN112865021B true CN112865021B (en) | 2022-07-05 |
Family
ID=76000989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011644910.5A Active CN112865021B (en) | 2020-12-31 | 2020-12-31 | Motor protection method, device, equipment and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112865021B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114034826B (en) * | 2021-11-05 | 2024-01-23 | 深圳市善土实业有限公司 | Production environment monitoring system for freeze-drying cubilose process based on data analysis |
| CN114583660B (en) * | 2021-12-07 | 2023-12-26 | 江苏金智科技股份有限公司 | Motor relay protection device and method for belt conveyor scratch fault protection |
| CN114301373B (en) * | 2021-12-30 | 2024-03-22 | 深圳市汇川技术股份有限公司 | Motor control method, apparatus and storage medium |
| CN114740823A (en) * | 2022-04-01 | 2022-07-12 | 宁波迪卡数控科技有限公司 | Servo motor remote control method, system, terminal and storage medium based on Internet technology |
| CN114904451A (en) * | 2022-04-19 | 2022-08-16 | 深圳拓邦股份有限公司 | Method and device for detecting falling of rotor of liquid stirring machine, storage medium and computer |
| CN116046051B (en) * | 2022-09-30 | 2024-06-18 | 青岛鹏海软件有限公司 | Intelligent motor management method and system and electronic equipment thereof |
| CN117335705B (en) * | 2023-09-17 | 2025-01-10 | 武汉市正弦电气技术有限公司 | Spindle motor control method, system, equipment and storage medium of numerical control machine tool |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108649844A (en) * | 2018-05-31 | 2018-10-12 | 南京航空航天大学 | A kind of brushless direct current power-generating system feed forward control method and control system |
| CN111983300A (en) * | 2019-05-23 | 2020-11-24 | 深圳拓邦股份有限公司 | Motor current detection method and system, stirrer and storage medium |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104699076B (en) * | 2015-02-11 | 2017-07-28 | 广东威灵电机制造有限公司 | A kind of electric machine control system and its microelectronics fault detection method and device |
| CN204615692U (en) * | 2015-05-12 | 2015-09-02 | 安徽理工大学 | Based on the supersonic motor measured operating parameter system of DSP |
| CN110441584B (en) * | 2019-08-26 | 2020-11-17 | 珠海格力电器股份有限公司 | Equipment running state monitoring method, device, storage medium and system |
-
2020
- 2020-12-31 CN CN202011644910.5A patent/CN112865021B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108649844A (en) * | 2018-05-31 | 2018-10-12 | 南京航空航天大学 | A kind of brushless direct current power-generating system feed forward control method and control system |
| CN111983300A (en) * | 2019-05-23 | 2020-11-24 | 深圳拓邦股份有限公司 | Motor current detection method and system, stirrer and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112865021A (en) | 2021-05-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112865021B (en) | Motor protection method, device, equipment and storage medium | |
| CN108870643B (en) | Air conditioner and detection method, detection device and readable storage medium thereof | |
| CN112332721B (en) | Control method, control device and control circuit of direct current motor | |
| KR20070098598A (en) | Methods of detecting arc faults characterized by consecutive periods of arcing | |
| KR20120011017A (en) | Motor-drive unit | |
| CN111193455A (en) | Ultra-high slip motor control method, device, storage medium and electronic apparatus | |
| CN111983300A (en) | Motor current detection method and system, stirrer and storage medium | |
| CN110277952B (en) | Motor overcurrent protection method and device | |
| CN113704698B (en) | Event detection method and system for non-intrusive load identification | |
| CN116995616A (en) | Motor protection method, protection device and computer readable medium | |
| CN115219769B (en) | Current detection method, electric tool and computer readable medium | |
| CN114325382B (en) | Method and system for detecting open-phase fault of three-phase alternating current motor and electric equipment | |
| CN113359028B (en) | Motor operation detection method and device, storage medium and electronic equipment | |
| CN115333046A (en) | Self-adjusting protection method for motor | |
| CN112033875A (en) | Filter screen replacement detection method and device, electrical equipment and storage medium | |
| CN112923839B (en) | Stepping motor control method, device, equipment and storage medium | |
| CN113686569A (en) | Transmission mechanism torque detection method, device, equipment and storage medium | |
| CN113176439B (en) | Single-phase alternating-current voltage detection circuit and detection method thereof | |
| CN217692654U (en) | Overcurrent protection circuit of brushless direct current motor and medical equipment | |
| CN111224592A (en) | Permanent magnet motor control method of nonlinear model | |
| CN111463745B (en) | Method and system for removing interference signals in overcurrent protection | |
| CN117013497A (en) | Converter starting protection method, device computer equipment and storage medium | |
| CN113641149B (en) | Tool magazine operation control method, device, equipment and storage medium | |
| CN113917222A (en) | Calculation method and protection device for overload current of brushless DC motor | |
| CN110635537B (en) | Charging control method and device and robot |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |