CN113328415A - Control method and device for driving motor of invisible protective net - Google Patents
Control method and device for driving motor of invisible protective net Download PDFInfo
- Publication number
- CN113328415A CN113328415A CN202011352688.1A CN202011352688A CN113328415A CN 113328415 A CN113328415 A CN 113328415A CN 202011352688 A CN202011352688 A CN 202011352688A CN 113328415 A CN113328415 A CN 113328415A
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- current
- driving motor
- driving
- motor
- operate
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000001681 protective effect Effects 0.000 title claims abstract description 13
- 238000005070 sampling Methods 0.000 claims description 19
- 230000002265 prevention Effects 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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Classifications
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- 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
- H02H7/0854—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 responsive to rate of change of current, couple or speed, e.g. anti-kickback protection
Abstract
The invention relates to a control method and a device for a driving motor of an invisible protective net. The method comprises the following steps: acquiring current for driving a motor to operate; and judging whether the current for driving the motor to operate is greater than a preset protection threshold value or not, and if so, stopping driving the motor. The invention can realize the overload protection of the current of the driving motor, in addition, when the invisible protection net is blocked by foreign matters (such as people) in the starting process, the current of the running of the motor can be increased, and whether the invisible protection net is blocked by the foreign matters or not can be conveniently judged by detecting the current of the running of the motor, thereby realizing the prevention of the invisible protection net clamping the people to hurt the people.
Description
Technical Field
The invention relates to a control method of a driving motor of an invisible protective net.
Background
In the prior art, the invisible protective net is wound and unfolded through a driving motor arranged in the invisible protective net. However, due to the lack of effective measures, the phenomenon that the driving motor is damaged by overload or people are clamped to hurt people easily occurs.
Disclosure of Invention
The invention provides a control method of a driving motor of an invisible protective net, which comprises the following steps: acquiring current for driving a motor to operate; and judging whether the current for driving the motor to operate is greater than a preset protection threshold value or not, and if so, stopping driving the motor.
The invention can realize the overload protection of the current of the driving motor, in addition, when the invisible protection net is blocked by foreign matters (such as people) in the starting process, the current of the running of the motor can be increased, and whether the invisible protection net is blocked by the foreign matters or not can be conveniently judged by detecting the current of the running of the motor, thereby realizing the prevention of the invisible protection net clamping the people to hurt the people.
Drawings
Fig. 1 shows a flow chart of a control method of a driving motor of an invisible protection net according to the invention;
fig. 2 is a schematic structural diagram showing a control device for a concealed protective net driving motor according to the present invention.
Detailed Description
The present application is further described below with reference to the accompanying drawings.
Example one
As shown in fig. 1, a method for controlling a driving motor of an invisible protection net includes the following steps:
step S100, obtaining the current for driving the motor to operate;
and step S200, judging whether the current for driving the motor to operate is greater than a preset protection threshold value, and if so, stopping driving the motor.
This technical scheme can realize driving motor current overload protection, and when stealthy protection network had foreign matter (for example people) to block at the start-up in-process in addition, the electric current of motor operation will increase, and the electric current through detecting the motor operation so that whether judge there is the foreign matter to block stealthy protection network, realizes preventing that stealthy protection network presss from both sides the people and hinders the people.
In step S100, the step of obtaining the current for driving the motor to operate includes:
step S101, sampling the current running by the driving motor according to a preset time interval, and obtaining a current instantaneous value running by the driving motor by sampling each time;
s102, continuously sampling for n times, wherein n is more than or equal to 2;
step S103, calculating the average value of the current of n times of continuous sampling according to the following formula:
wherein, PiThe current instantaneous value adopted at the ith time is M, and the current average value of n times of sampling is M;
in step S200, the determining whether the current for driving the motor is greater than the preset protection threshold means determining whether M is greater than the preset protection threshold.
When the instantaneous current value is greater than the protection threshold, it cannot be accurately determined that a failure of the driving motor has occurred or a foreign object blocks the invisible protection net, for example, the instantaneous current value is greater than the preset protection threshold, and after the instantaneous current value, the remaining instantaneous current values return to a state lower than the preset protection threshold, and in this case, if the instantaneous current value is used as a comparison object to stop the driving motor, a false determination may occur, which may affect the actual operation of the invisible protection net.
In the present embodiment, the current average value is used as a comparison target, so that continuous detection is realized and the false rate can be reduced.
In this embodiment, for example, the rated current of the driving motor is 5.0 amperes, and the preset protection threshold value may be set to be 6.0 amperes to 8.0 amperes; the predetermined time interval may be set to be between 5ms and 20ms, and n may be set to be between 5 and 20 times.
For example, the preset protection threshold is set to 7.5 amperes, the preset time interval is set to 10ms, and n is set to 10 times, wherein it is assumed that the current instantaneous values of consecutive 10 times of sampling are 4.9, 4.8, 5.0, 8.0, 7.5, 7.0, 6.0, 5.1, 5.0, and 5.0 in sequence;
then
M <7.5(A), without stopping the drive motor.
For another example, the preset protection threshold is set to be 7.0 amperes, the preset time interval is set to be 8ms, and n is set to be 8 times, wherein it is assumed that the current instantaneous values of continuous 8 times of sampling are 4.9, 4.8, 5.0, 6.0, 7.0, 9.0, 10.0 and 12.0 in sequence;
then
M >7.0(A), at which time the drive motor is stopped.
In step S200, that is, in the step of determining whether the current for driving the driving motor to operate is greater than the preset protection threshold, when the determination result is no, the step of obtaining the current for driving the driving motor to operate is returned to.
Before obtaining the current for driving the motor (i.e. before step S100), the method further comprises the following steps: the driving motor S300 is started by a soft start.
The motor is gradually accelerated by adopting soft start to realize smooth start and effectively protect the driving motor.
In this embodiment, the soft start duration of the driving motor is X seconds, that is, the time for gradually increasing the input current of the motor from zero until the end of the soft start is X seconds. Wherein, X takes 3 to 6 seconds, preferably 4 to 5 seconds.
Example two
As shown in fig. 2, the control device for the invisible protection net driving motor comprises:
the soft start module 10 is used for starting the driving motor 50 in a soft start mode;
the current acquisition module 20 is used for acquiring the current for driving the motor to operate;
the judging module 30 is used for judging whether the current for driving the motor to operate is larger than a preset protection threshold value;
and the control module 40 is used for stopping the driving motor 50 when the current for driving the motor is larger than a preset protection threshold value.
The soft start module 10, the current obtaining module 20, the determining module 30 and the control module 40 can establish signal connection.
The current acquisition module comprises an A/D sampling module, wherein the A/D sampling module is used for sampling the current running by the driving motor according to a preset time interval, and each sampling obtains a current instantaneous value running by the driving motor.
Claims (8)
1. A control method of a driving motor of an invisible protective net is characterized by comprising the following steps:
acquiring current for driving a motor to operate;
judging whether the current for driving the motor to operate is greater than a preset protection threshold value or not;
if yes, stopping driving the motor.
2. The method for controlling a concealed protective net driving motor according to claim 1,
the step of obtaining the current for driving the motor to operate includes:
sampling the current running by the driving motor according to a preset time interval, obtaining a current instantaneous value running by the driving motor by sampling each time, and continuously sampling for n times, wherein n is more than or equal to 2;
the average value of the current of n consecutive samples is calculated according to the following formula:
wherein, PiThe current instantaneous value adopted at the ith time is M, and the current average value of n times of sampling is M;
the judgment of whether the current for driving the motor to operate is greater than the preset protection threshold means that whether M is greater than the preset protection threshold is judged.
3. The method for controlling the invisible protection net driving motor according to claim 2, characterized in that:
and in the step of judging whether the current running by the driving motor is larger than a preset protection threshold value or not, when the judgment result is negative, returning to the step of acquiring the current running by the driving motor.
4. The method for controlling a concealed protective net driving motor according to claim 2,
before obtaining the current for driving the motor to run, the method also comprises the following steps:
and starting the driving motor in a soft start mode.
5. The method for controlling a concealed protective net driving motor according to claim 4, wherein,
the soft start duration of the driving motor is X seconds, and the value of X is 3 to 6 seconds.
6. A control device of a driving motor of an invisible protective net is characterized by comprising:
the current acquisition module is used for acquiring the current for driving the motor to operate;
the judging module is used for judging whether the current for driving the motor to operate is larger than a preset protection threshold value or not;
and the control module is used for stopping the driving motor when the current for driving the motor to operate is greater than a preset protection threshold value.
7. The control device for the invisible protection net driving motor according to claim 6, wherein the current obtaining module comprises an A/D sampling module, the A/D sampling module is used for sampling the current running by the driving motor according to a preset time interval, and each sampling obtains a current instantaneous value running by the driving motor.
8. The control device for the invisible protection net driving motor according to claim 7, characterized in that the control device further comprises a soft start module for starting the driving motor in a soft start manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011352688.1A CN113328415A (en) | 2020-11-27 | 2020-11-27 | Control method and device for driving motor of invisible protective net |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011352688.1A CN113328415A (en) | 2020-11-27 | 2020-11-27 | Control method and device for driving motor of invisible protective net |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113328415A true CN113328415A (en) | 2021-08-31 |
Family
ID=77413159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011352688.1A Pending CN113328415A (en) | 2020-11-27 | 2020-11-27 | Control method and device for driving motor of invisible protective net |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113328415A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104184123A (en) * | 2013-05-21 | 2014-12-03 | 上海联影医疗科技有限公司 | Motor, motor motion protection method and device |
| CN104699076A (en) * | 2015-02-11 | 2015-06-10 | 广东威灵电机制造有限公司 | Motor control system and micro-electronic fault detection method and device thereof |
| CN104969463A (en) * | 2013-01-31 | 2015-10-07 | 三菱电机株式会社 | Motor drive device |
| CN107665691A (en) * | 2017-11-13 | 2018-02-06 | 深圳市华星光电技术有限公司 | The overcurrent protection method and over-current protection system of liquid crystal display panel |
| CN109532577A (en) * | 2018-12-24 | 2019-03-29 | 上海科世达-华阳汽车电器有限公司 | A kind of anti-clamping method of automatic seat, device and automatic seat controller |
| CN110277952A (en) * | 2019-06-29 | 2019-09-24 | 潍柴动力股份有限公司 | Over current of motor guard method and device |
-
2020
- 2020-11-27 CN CN202011352688.1A patent/CN113328415A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104969463A (en) * | 2013-01-31 | 2015-10-07 | 三菱电机株式会社 | Motor drive device |
| CN104184123A (en) * | 2013-05-21 | 2014-12-03 | 上海联影医疗科技有限公司 | Motor, motor motion protection method and device |
| CN104699076A (en) * | 2015-02-11 | 2015-06-10 | 广东威灵电机制造有限公司 | Motor control system and micro-electronic fault detection method and device thereof |
| CN107665691A (en) * | 2017-11-13 | 2018-02-06 | 深圳市华星光电技术有限公司 | The overcurrent protection method and over-current protection system of liquid crystal display panel |
| CN109532577A (en) * | 2018-12-24 | 2019-03-29 | 上海科世达-华阳汽车电器有限公司 | A kind of anti-clamping method of automatic seat, device and automatic seat controller |
| CN110277952A (en) * | 2019-06-29 | 2019-09-24 | 潍柴动力股份有限公司 | Over current of motor guard method and device |
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Application publication date: 20210831 |
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