CN106410759A - Method and device for communication overcurrent protection of AC wire controller - Google Patents
Method and device for communication overcurrent protection of AC wire controller Download PDFInfo
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- CN106410759A CN106410759A CN201510454744.5A CN201510454744A CN106410759A CN 106410759 A CN106410759 A CN 106410759A CN 201510454744 A CN201510454744 A CN 201510454744A CN 106410759 A CN106410759 A CN 106410759A
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Abstract
The invention relates to a method and device for communication overcurrent protection of an AC wire controller. The method for communication overcurrent protection of the AC wire controller comprises the steps of detecting overcurrent signals; counting the number of times of the detected overcurrent signals; and judging the interval to which the number of times belongs, and performing a corresponding operation. The device for communication overcurrent protection of the AC wire controller comprises a detection unit for detecting overcurrent signals; a counting unit for counting the number of times of the detected overcurrent signals; and an execution unit for executing, on the basis of an interval to which the number of times belongs, a corresponding operation. According to the invention, the time of stopping the output is dynamically adjusted according to different accumulated number of times of the overcurrent signals, and the voltage switching initial interference and power-on initial interference can be eliminated; and an instantaneous short circuit can be immediately restored, a long-time short circuit can automatically prolong the time that the output is tried again, the user experience is greatly improved, and meanwhile the security of components can be protected to the greatest extent.
Description
Technical field
The invention belongs to over-current signal detection technique field, more particularly, to one kind exchange line control machine communicated
The method of stream protection and its device.
Background technology
Low-power consumption at present is the problem of industry-by-industry primary study, and air conditioner industry is also such, leads at present
AC transformer power supply mode, than larger the drawbacks of be：The efficiency of transformer is low, loss is big,
It is unfavorable for reducing Overall Power Consumption；All progressively begin with Switching Power Supply mode therefore in industry to power, excellent
Putting is：Efficiency high, can provide that electric current is big, defencive function perfect (excessively stream, overload etc.).
Computer board is powered using Switching Power Supply mode, for the producer using exchange line control machine before,
Just bring a new problem, Switching Power Supply cannot provide the zero cross signal of 50Hz/60Hz.Many institutes
Known, exchange line control machine communication is that the zero cross signal relying on AC power is communicated, no zero cross signal,
Exchange line control machine cannot use；In order to ensure the versatility of product, powered using Switching Power Supply mode
Computer board also requires that and can mate exchange line control machine.In this case, invent direct current and deliver stream dress
Put, the function that direct current turns that ac equipment is capable of is：D. c. voltage signal is converted to AC signal,
Power for line control machine and zero cross signal is provided.
Turned when ac equipment is powered for line control machine using direct current it is necessary to consider that overload protection, excessively stream are protected
Shield, the problem of short-circuit protection, otherwise will result in the operating of Switching Power Supply long-time heavy load and direct current
Deliver that flow module temperature rise is too high, cause the damage of device.
For overcurrent protection, widespread practice is over-current signal is detected, continues for some time, at once
Stop output, be then passed through a regular time, reattempt output；This way is using single solution for diverse problems
Strategy, no matter which kind of situation i.e., such as instantaneous short circuit, short-circuit for a long time or upper surge excessively stream, all
Using a strategy, so cause Consumer's Experience very poor, inadequate hommization.
Content of the invention
In view of this, in order to solve the detection control program of over-current signal present in prior art single,
Overcurrent protection way is single, the problem of inadequate hommization, it is an object of the invention to provide a kind of AC line
Control device communicates method and its device of overcurrent protection.
A kind of method that exchange line control machine communicates overcurrent protection, comprises the following steps：
Detection over-current signal；
The number of times of the over-current signal that statistic mixed-state arrives；
Judge the interval belonging to described number of times, execute corresponding operation.
In some optional embodiments, described detection includes detecting the over-current signal of exchange line control machine
Number of times.
In some optional embodiments, the described step judging the interval belonging to described number of times includes：
Described number of times is compared with each threshold value successively, judges affiliated interval.
In some optional embodiments, the corresponding operation of described execution includes：
If affiliated interval is in first interval, execute control terminal voltage output；
If affiliated interval is in second interval, after stopping output very first time interval, execute control
The step of terminal voltage output；
If affiliated interval is in 3rd interval, after stopping output the second time interval, execute control
The step of terminal voltage output；
If affiliated interval exceeds affiliated 3rd interval, after stopping output the 3rd time interval, hold
The step of row control terminal voltage output.
In some optional embodiments, described first interval is within 200；
Described second interval between 200 and 4000, stop output very first time interval when a length of
20 seconds；
Described second interval between 4000 and 8000, stop output the second time interval when a length of
2 minutes；
Described 3rd interval includes the interval more than 8000, stop output the 3rd time interval when a length of
12 minutes.
In some optional embodiments, methods described also includes：If affiliated interval is in the firstth area
Between, then after the over-current signal of certain number of times is often detected, stop output pulse signal a cycle, when
The time stopping output a cycle arrives, and executes described control terminal voltage output.
A kind of exchange line control machine communicates the device of overcurrent protection, and described device includes：
Detector unit：For detecting over-current signal；
Counting unit：The number of times of the over-current signal arriving for statistic mixed-state；
Performance element：For the interval according to belonging to described number of times, execute corresponding operation.
In some optional embodiments, described device also includes judging unit, for judging described time
Interval belonging to number, described number of times is compared with each threshold value successively, judges affiliated interval；
If affiliated interval is in first interval, counting unit includes count sub-element, often count down to
After certain number of times, performance element stops output pulse signal a cycle, stops output a cycle
Time arrives, performance element control terminal voltage output；
If affiliated interval is in second interval, performance element is controlled after stopping output very first time interval
Terminal voltage output processed；
If affiliated interval is in 3rd interval, performance element is controlled after stopping output the second time interval
Terminal voltage output processed；
If affiliated interval exceeds affiliated 3rd interval, performance element stopped between the 3rd time of output
Every rear control terminal voltage output.
In some optional embodiments, described detector unit is over-current signal testing circuit.
In some optional embodiments, described device is arranged in anti-chip and burns in protection module.
The beneficial effects of the present invention is：The detection control program of over-current signal has been carried out carefully by the present invention
Change, for same over-current signal, according to the difference of cumulative frequency, dynamic adjustment stop output when
Between, the interference of voltage switching initial stage, upper electricity initial stage interference can be excluded；And instantaneous short circuit can be recovered immediately,
Short circuit can automatically prolong the time again attempting to export for a long time, greatly improves the experience journey of user
Degree, can farthest protect the safety of components and parts itself simultaneously.
Brief description
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the one of the application
Part, the schematic description and description of the present invention is used for explaining the present invention, does not constitute to this
Bright improper restriction.In the accompanying drawings：
Fig. 1 shows that the exchange line control machine of the present invention communicates the schematic flow sheet of the method for overcurrent protection；
Fig. 2 shows that the exchange line control machine of one embodiment of the invention communicates the tool of the method for overcurrent protection
Body schematic flow sheet；
Fig. 3 shows that the exchange line control machine of the present invention communicates the schematic diagram of the device of overcurrent protection.
Fig. 4 shows that the exchange line control machine of one embodiment of the present of invention communicates the device institute of overcurrent protection
Using over-current signal testing circuit schematic diagram.
Fig. 5 shows that the exchange line control machine of one embodiment of the present of invention communicates the device of overcurrent protection
Arrangement schematic diagram.
Specific embodiment
Fig. 1 shows that the exchange line control machine of the present invention communicates the schematic flow sheet of the method for overcurrent protection.
As shown in figure 1, in some illustrative embodiments, described exchange line control machine communication excessively stream is protected
The method of shield, including following step：
Step S101：Detection over-current signal；
Step S102：The number of times of the over-current signal that statistic mixed-state arrives；
Step S103：Judge the interval belonging to described number of times, execute corresponding operation.
In the above-described embodiments, judge that the step in the interval belonging to described number of times includes：By described number of times
Compare with each threshold value successively, judge affiliated interval.
In certain embodiments, the corresponding operation of execution includes：
If affiliated interval is in first interval, execute control terminal voltage output；If affiliated
Interval in first interval, then when the upper a cycle stopping output, time is up, the described control of execution
Terminal voltage exports；
If affiliated interval is in second interval, after stopping output very first time interval, execute control
The step of terminal voltage output；
If affiliated interval is in 3rd interval, after stopping output the second time interval, execute control
The step of terminal voltage output；
If affiliated interval exceeds affiliated 3rd interval, after stopping output the 3rd time interval, hold
The step of row control terminal voltage output.
The over-current signal detecting number of times is finely divided by the method for the present invention, is divided according to affiliated interval
Do not execute corresponding operation；The interference of voltage switching initial stage, upper electricity initial stage interference can be excluded；And moment
Short circuit can recover immediately, and short circuit for a long time can automatically prolong the time again attempting to export.
With a specific embodiment, said method is illustrated below, Fig. 2 shows the present invention's
The exchange line control machine of one embodiment communicates the idiographic flow schematic diagram of the method for overcurrent protection, such as Fig. 2
Shown, in some illustrative embodiments, methods described, including following step：
Step S201：Detection over-current signal, records the over-current signal number of times a detecting；
Step S202：Judge the interval belonging to over-current signal number of times a detecting；
In this step, the interference of voltage switching initial stage and upper electricity initial stage interference can be excluded；If detecting
Over-current signal number of times a is less than or equal to 20 times, then continue executing with step S201, if the excessively stream letter detecting
Number number a is more than 20 times, then execution step S203 and step S204；
Step S203：Stop output pulse signal a cycle immediately；
Step S204：Over-current signal counts b and adds 1；
Step S205：Judge that over-current signal counts interval belonging to b；
In this step, if over-current signal counts b less than or equal to 10 times, that is, over-current signal number of times a exists
Within 200, then execution step S206；If over-current signal counts b being more than 10 times, execution step S209；
Step S206：Judge to stop the time of output pulse signal a cycle；
In this step, if the time stopping output pulse signal a cycle arrives, execution step
S207；If it is not, then execution step S208；In this step, by producing the initial stage in over-current signal,
Stop the very short time of output a cycle, next cycle recovers to export automatically, again attempt to recover to supply
Electricity, solves the problems, such as instantaneous short circuit；
Step S207：Control terminal voltage output execution step S201；
Step S208：Continue waiting for output execution step S205；
Step S209：Excessively stream occurs history number of times c to add 1；
Step S210：Judge that excessively stream occurs interval belonging to history number of times c；Go through according to there is excessively stream
The difference of history number of times c, will stop the time trapezoidal increase of output, long short circuit can be prolonged automatically
Length again attempts to the time exporting, and farthest protects analog device, can remove in short circuit simultaneously
Afterwards, automatically recover output；
In this step, if excessively stream occurs history number of times c to be less than or equal to 20 times, i.e. over-current signal number of times
A between 200 and 4000, then execution step S211；If excessively stream occurs history number of times c to be more than 20
Secondary, that is, over-current signal number of times a is more than 4000, then execution step S212；
Step S211：Stop output 20s, then control terminal voltage output；
Step S212：Judge that excessively stream occurs interval belonging to history number of times c；
In this step, if excessively stream occurs history number of times c to be more than 20 times and is less than or equal to 40 times, i.e. mistake
Stream signal number of times a between 4000 and 8000, then execution step S213；If there is history time in excessively stream
More than 40 times, that is, over-current signal number of times a is more than 8000 to number c, then execution step S214；
Step S213：Stop output 2min, then control terminal voltage output；
Step S214：Stop output 12min, then control terminal voltage output.
In the above-described embodiments, in order to realize exchanging line control machine communication overcurrent protection, output will be stopped
Time trapezoidal increase, in practical operation, if the affiliated interval dividing is excessive, in this affiliated interval
Interior device is easily overheated, causes to damage；If the affiliated interval dividing is too small, can not be short for moment
Situations such as road, short-circuit for a long time or upper surge excessively stream, carries out output control respectively.
Fig. 3 shows that the exchange line control machine of the present invention communicates the schematic diagram of the device of overcurrent protection.
As shown in figure 3, in some illustrative embodiments, described exchange line control machine communication excessively stream is protected
The device 300 of shield, including：
Detector unit 301：For detecting over-current signal；
Counting unit 302：The number of times of the over-current signal arriving for statistic mixed-state；
Performance element 303：For the interval according to belonging to described number of times, execute corresponding operation.
In the above-described embodiments, described detector unit 301 to detect friendship using over-current signal testing circuit
The number of times of the over-current signal of stream line control machine.
In certain embodiments, described exchange line control machine communicates the device of overcurrent protection, also includes judging
Unit 304, for judging the interval belonging to described number of times, described number of times is compared with each threshold value successively,
Interval belonging to judging：
If affiliated interval is in first interval, counting unit includes count sub-element 3021, counts
After subelement often count down to certain number of times, such as 20 times, performance element 303 stops output pulse signal
A cycle, the time stopping output a cycle arrives, performance element 303 control terminal voltage output；
If affiliated interval is in second interval, performance element 303 stops output very first time interval
Afterwards, such as 20s, control terminal voltage output；
If affiliated interval is in 3rd interval, performance element 303 stops output the second time interval
Afterwards, such as 2min, control terminal voltage output；
If affiliated interval exceeds affiliated 3rd interval, when performance element 303 stops output the 3rd
Between be spaced after, such as 12min, control terminal voltage output.
Fig. 4 shows that the exchange line control machine of one embodiment of the present of invention communicates the device institute of overcurrent protection
Using over-current signal testing circuit schematic diagram.The described detector unit 301 for detecting over-current signal
Can be using over-current signal testing circuit as shown in Figure 4.Described over-current signal testing circuit include MCU,
Multiple resistance, multiple electric capacity and multiple triode.Wherein, resistance R226 mono- terminates+12V current potential,
And resistance R226 is in parallel with resistance R227；The emitter stage of triode P1 connects+12V current potential, base stage with
The resistance R226 other end is connected, and colelctor electrode connects one end of resistance R228；The other end of resistance R228
Connect one end of resistance R229 and electric capacity C64 and the base stage of triode N18 respectively；Resistance R229
It is grounded respectively with the other end of electric capacity C64 and the emitter stage of triode N18；The collection of triode N18
Electrode connects resistance R230 and one end of resistance R231 respectively；Another termination+5V electricity of resistance R230
Position；One end of another termination capacitor C65 of resistance R231, and export SHORT pin state；
The other end ground connection of electric capacity C65.
In described over-current signal testing circuit, when flowing through the electric current of+12V current potential more than 600mA,
Triode P1 turns on, thus triode N18 opens, SHORT pin state is changed into low from high level
Level, thus produces over-current signal；After MCU detects over-current signal, and then the side according to the present invention
Method carries out line control machine power supply output control.
Fig. 5 shows that the exchange line control machine of one embodiment of the present of invention communicates the device of overcurrent protection
Arrangement schematic diagram.As shown in figure 5, the device that the exchange line control machine of the present invention communicates overcurrent protection is permissible
It is arranged in anti-chip to burn in protection module.
The exchange line control machine of the present invention communicates the method for overcurrent protection and its device by the detection of over-current signal
Control program is refined, for same over-current signal, according to the difference of cumulative frequency, dynamically
Adjustment stops the time of output, greatly improves the experience degree of user, simultaneously can be at utmost
Protection components and parts itself safety.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for
For those skilled in the art, the present invention can have various modifications and variations.All essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement made etc., should be included in the present invention
Protection domain within.
Claims (10)
1. a kind of exchange line control machine communicate overcurrent protection method it is characterised in that methods described include following
Step：
Detection over-current signal；
The number of times of the over-current signal that statistic mixed-state arrives；
Judge the interval belonging to described number of times, execute corresponding operation.
2. according to claim 1 exchange line control machine communicate overcurrent protection method it is characterised in that
Described detection includes：The number of times of the over-current signal of detection exchange line control machine.
3. according to claim 1 exchange line control machine communicate overcurrent protection method it is characterised in that
The described step judging the interval belonging to described number of times includes：By described number of times successively with each threshold value ratio
Relatively, judge affiliated interval.
4. according to claim 3 exchange line control machine communicate overcurrent protection method it is characterised in that
The corresponding operation of described execution includes：
If affiliated interval is in first interval, execute control terminal voltage output；
If affiliated interval is in second interval, after stopping output very first time interval, execute control
The step of terminal voltage output；
If affiliated interval is in 3rd interval, after stopping output the second time interval, execute control
The step of terminal voltage output；
If affiliated interval exceeds affiliated 3rd interval, after stopping output the 3rd time interval, hold
The step of row control terminal voltage output.
5. according to claim 4 exchange line control machine communicate overcurrent protection method it is characterised in that
Described first interval is within 200；
Described second interval between 200 and 4000, stop output very first time interval when a length of
20 seconds；
Described second interval between 4000 and 8000, stop output the second time interval when a length of
2 minutes；
Described 3rd interval includes the interval more than 8000, stop output the 3rd time interval when a length of
12 minutes.
6. the method that the exchange line control machine according to claim 4 or 5 communicates overcurrent protection, its feature exists
In methods described also includes：If affiliated interval, in first interval, often detects certain number of times
Over-current signal after, stop output pulse signal a cycle, when stop output a cycle time
Arrive, execute described control terminal voltage output.
7. a kind of exchange line control machine communicates the device of overcurrent protection it is characterised in that described device includes：
Detector unit：For detecting over-current signal；
Counting unit：The number of times of the over-current signal arriving for statistic mixed-state；
Performance element：For the interval according to belonging to described number of times, execute corresponding operation.
8. according to claim 7 exchange line control machine communicate overcurrent protection device it is characterised in that
Described device also includes judging unit, for judging the interval belonging to described number of times, by described number of times according to
Secondary compare with each threshold value, judge belonging to interval；
If affiliated interval is in first interval, counting unit includes count sub-element, often count down to
After certain number of times, performance element stops output pulse signal a cycle, stops output a cycle
Time arrives, performance element control terminal voltage output；
If affiliated interval is in second interval, performance element is controlled after stopping output very first time interval
Terminal voltage output processed；
If affiliated interval is in 3rd interval, performance element is controlled after stopping output the second time interval
Terminal voltage output processed；
If affiliated interval exceeds affiliated 3rd interval, performance element stopped between the 3rd time of output
Every rear control terminal voltage output.
9. the exchange line control machine according to claim 7 or 8 communicates the device of overcurrent protection, and its feature exists
In described detector unit is over-current signal testing circuit.
10. the exchange line control machine according to claim 7 or 8 communicates the device of overcurrent protection, and its feature exists
In described device is arranged in anti-chip and burns in protection module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510454744.5A CN106410759B (en) | 2015-07-29 | 2015-07-29 | A kind of method and device thereof of exchange line control machine communication overcurrent protection |
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|---|---|---|---|
| CN201510454744.5A CN106410759B (en) | 2015-07-29 | 2015-07-29 | A kind of method and device thereof of exchange line control machine communication overcurrent protection |
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| CN106410759B CN106410759B (en) | 2018-12-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111555240A (en) * | 2020-05-26 | 2020-08-18 | 宁波奥克斯电气股份有限公司 | Air conditioner wire controller protection method and protection system |
| CN114167970A (en) * | 2021-12-09 | 2022-03-11 | 深圳市海浦蒙特科技有限公司 | Overcurrent protection method and related assembly |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101350512A (en) * | 2007-07-19 | 2009-01-21 | 佛山普立华科技有限公司 | Over current protective system |
| CN101594048A (en) * | 2009-03-19 | 2009-12-02 | 深圳市联德合微电子有限公司 | A kind of PWM type buck converter with overcurrent protection function |
| CN101777846A (en) * | 2009-12-31 | 2010-07-14 | 四川虹欧显示器件有限公司 | System and method for controlling switch power supply |
| CN102035190A (en) * | 2010-12-23 | 2011-04-27 | 上海贝岭股份有限公司 | Over-current protection circuit |
| CN103513164A (en) * | 2012-06-25 | 2014-01-15 | 中国科学院电子学研究所 | Method for monitoring discharge energy instantaneous value and accumulation value of klystron |
| CN104548354A (en) * | 2015-01-14 | 2015-04-29 | 深圳市科曼医疗设备有限公司 | Defibrillation charging overcurrent protection device of defibrillator monitor and defibrillator monitor |
-
2015
- 2015-07-29 CN CN201510454744.5A patent/CN106410759B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101350512A (en) * | 2007-07-19 | 2009-01-21 | 佛山普立华科技有限公司 | Over current protective system |
| CN101594048A (en) * | 2009-03-19 | 2009-12-02 | 深圳市联德合微电子有限公司 | A kind of PWM type buck converter with overcurrent protection function |
| CN101777846A (en) * | 2009-12-31 | 2010-07-14 | 四川虹欧显示器件有限公司 | System and method for controlling switch power supply |
| CN102035190A (en) * | 2010-12-23 | 2011-04-27 | 上海贝岭股份有限公司 | Over-current protection circuit |
| CN103513164A (en) * | 2012-06-25 | 2014-01-15 | 中国科学院电子学研究所 | Method for monitoring discharge energy instantaneous value and accumulation value of klystron |
| CN104548354A (en) * | 2015-01-14 | 2015-04-29 | 深圳市科曼医疗设备有限公司 | Defibrillation charging overcurrent protection device of defibrillator monitor and defibrillator monitor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111555240A (en) * | 2020-05-26 | 2020-08-18 | 宁波奥克斯电气股份有限公司 | Air conditioner wire controller protection method and protection system |
| CN111555240B (en) * | 2020-05-26 | 2023-02-10 | 宁波奥克斯电气股份有限公司 | Air conditioner wire controller protection method and protection system |
| CN114167970A (en) * | 2021-12-09 | 2022-03-11 | 深圳市海浦蒙特科技有限公司 | Overcurrent protection method and related assembly |
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| CN106410759B (en) | 2018-12-18 |
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