CN106410759B - A kind of method and device thereof of exchange line control machine communication overcurrent protection - Google Patents
A kind of method and device thereof of exchange line control machine communication overcurrent protection Download PDFInfo
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- CN106410759B CN106410759B CN201510454744.5A CN201510454744A CN106410759B CN 106410759 B CN106410759 B CN 106410759B CN 201510454744 A CN201510454744 A CN 201510454744A CN 106410759 B CN106410759 B CN 106410759B
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Abstract
The present invention relates to a kind of method and device thereof of exchange line control machine communication overcurrent protection.The method of the exchange line control machine communication overcurrent protection is comprising steps of detection over-current signal；The number for the over-current signal that statistic mixed-state arrives；Judge section belonging to the number, executes corresponding operation.The device of the exchange line control machine communication overcurrent protection includes: the detection unit for detecting over-current signal；The counting unit of the number of the over-current signal arrived for statistic mixed-state；For the section according to belonging to the number, the execution unit of the corresponding operation of execution.Difference of the present invention according to over-current signal cumulative frequency, the time of dynamic adjustment stopping output can excluding voltage switching initial stage interference, power on initial stage interference；And instantaneous short circuit can recover immediately, and short circuit for a long time, which can automatically prolong, again attempts to the time of output, greatly improve the experience degree of user, while can protect the safety of component itself to the greatest extent.
Description
Technical field
The invention belongs to over-current signal detection technique field more particularly to a kind of sides of exchange line control machine communication overcurrent protection
Method and its device.
Background technique
Low-power consumption at present is the project of various industries primary study, and air conditioner industry is also in this way, exchange general at present becomes
Transformer power-supply mode, bigger drawback is: the low efficiency of transformer, loss are big, are unfavorable for reducing Overall Power Consumption；Because of the industry
Inside all gradually start to power using Switching Power Supply mode, advantage is: high-efficient, can provide that electric current is big, the perfect (mistake of defencive function
Stream, overload etc.).
Computer board is powered using Switching Power Supply mode, for using the producer of exchange line control machine before, is just brought
One new project, Switching Power Supply can not provide the zero cross signal of 50Hz/60Hz.It is well known that exchange line control machine communication be according to
Zero cross signal by AC power source is communicated, no zero cross signal, and exchange line control machine is not available；In order to guarantee the general of product
Property, the computer board powered using Switching Power Supply mode is also required to matching exchange line control machine.In this case, it has invented straight
Circulate ac equipment, and the function that direct current turns ac equipment and can be realized is: d. c. voltage signal being converted to AC signal, is line
It controls device power supply and zero cross signal is provided.
When direct current being used to turn ac equipment as line control machine power supply, it is necessary to consider overload protection, overcurrent protection, short-circuit protection
The problem of, otherwise will result in the operating of Switching Power Supply long-time heavy load and direct current to deliver flow module temperature rise excessively high, cause device
The damage of part.
For overcurrent protection, widespread practice is to detect over-current signal, is continued for some time, and stops output at once, so
Afterwards by a regular time, output is reattempted；This way uses the strategy imposed uniformity without examining individual cases, no matter which kind of i.e. situation, such as
Instantaneous short circuit, permanent short circuit or upper surge overcurrent, all use a strategy, cause user experience very poor in this way, inadequate human nature
Change.
Summary of the invention
In view of this, in order to solve, the detection control program of over-current signal existing in the prior art is single, overcurrent protection
Single, not humanized enough the problem of way, the object of the present invention is to provide a kind of methods of exchange line control machine communication overcurrent protection
And its device.
A method of exchange line control machine communicates overcurrent protection, comprising the following steps:
Detect over-current signal；
The number for the over-current signal that statistic mixed-state arrives；
Judge section belonging to the number, executes corresponding operation.
In some alternative embodiments, the detection includes the number of the over-current signal of detection exchange line control machine.
In some alternative embodiments, the step of section belonging to the judgement number includes: by the number
Successively with each threshold value comparison, affiliated section is judged.
In some alternative embodiments, corresponding operate of the execution includes:
If affiliated section executes control terminal voltage output in first interval；
If affiliated section in second interval, stops after exporting first time interval, it is defeated to execute control terminal voltage
Out the step of；
If affiliated section in 3rd interval, stops after exporting the second time interval, it is defeated to execute control terminal voltage
Out the step of；
If affiliated section exceeds affiliated 3rd interval, stops after exporting third time interval, execute control terminal
The step of voltage output.
In some alternative embodiments, the first interval is less than or equal to 200；
The second interval be greater than 200 and be less than or equal to 4000, stop output first time interval when it is 20 seconds a length of；
The 3rd interval be greater than 4000 and be less than or equal to 8000, stop output the second time interval when it is 2 minutes a length of；
Section greater than 8000, stop output third time interval when it is 12 minutes a length of.
In some alternative embodiments, the method also includes: if affiliated section is in first interval, every detection
To after the over-current signal of certain number, stop output pulse signal a cycle, arrives, hold when the time for stopping output a cycle
The row control terminal voltage output.
A kind of device of exchange line control machine communication overcurrent protection, described device include:
Detection unit: for detecting over-current signal；
Counting unit: the number for the over-current signal that statistic mixed-state arrives；
Execution unit: for the section according to belonging to the number, corresponding operation is executed.
In some alternative embodiments, described device further includes judging unit, for judging area belonging to the number
Between, by the number successively with each threshold value comparison, judge affiliated section；
If affiliated section, in first interval, counting unit includes count sub-element, after often counting down to certain number,
Execution unit stops output pulse signal a cycle, and the time for stopping output a cycle arrives, execution unit control terminal electricity
Pressure output；
If affiliated section, in second interval, execution unit stops control terminal voltage after output first time interval
Output；
If affiliated section, in 3rd interval, execution unit stops control terminal voltage after the second time interval of output
Output；
If affiliated section exceeds affiliated 3rd interval, execution unit stops control terminal after output third time interval
Sub- voltage output.
In some alternative embodiments, the detection unit is over-current signal detection circuit.
In some alternative embodiments, described device is arranged in anti-chip and burns in protective module.
The beneficial effects of the present invention are: the present invention is refined the detection control program of over-current signal, for same
The over-current signal of sample, according to the difference of cumulative frequency, dynamic adjustment stops the time of output, and it is dry can to exclude voltage switching initial stage
It disturbs, power on initial stage interference；And instantaneous short circuit can recover immediately, for a long time short circuit can automatically prolong again attempt to output when
Between, the experience degree of user is greatly improved, while the safety of component itself can be protected to the greatest extent.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 shows the flow diagram of the method for exchange line control machine communication overcurrent protection of the invention；
Fig. 2 shows the detailed process signals of the method for the exchange line control machine communication overcurrent protection of one embodiment of the invention
Figure；
Fig. 3 shows the schematic diagram of the device of exchange line control machine communication overcurrent protection of the invention.
Fig. 4 shows overcurrent used by the device of the exchange line control machine communication overcurrent protection of one embodiment of the present of invention
The schematic diagram of signal deteching circuit.
Fig. 5 shows the arrangement signal of the device of the exchange line control machine communication overcurrent protection of one embodiment of the present of invention
Figure.
Specific embodiment
Fig. 1 shows the flow diagram of the method for exchange line control machine communication overcurrent protection of the invention.
As shown in Figure 1, in some illustrative embodiments, the method for the exchange line control machine communication overcurrent protection, packet
Include following steps:
Step S101: detection over-current signal；
Step S102: the number for the over-current signal that statistic mixed-state arrives；
Step S103: judging section belonging to the number, executes corresponding operation.
In the above-described embodiments, the step of judging section belonging to the number include: by the number successively with it is each
Threshold value comparison judges affiliated section.
In some embodiments, executing corresponding operation includes:
If affiliated section executes control terminal voltage output in first interval；If affiliated section is first
Section, then when stop output upper a cycle time is up, execute the control terminal voltage output；
If affiliated section in second interval, stops after exporting first time interval, it is defeated to execute control terminal voltage
Out the step of；
If affiliated section in 3rd interval, stops after exporting the second time interval, it is defeated to execute control terminal voltage
Out the step of；
If affiliated section exceeds affiliated 3rd interval, stops after exporting third time interval, execute control terminal
The step of voltage output.
The over-current signal number that method of the invention will test is finely divided, and executes correspondence respectively according to affiliated section
Operation；It can exclude voltage switching initial stage interference, power on initial stage interference；And instantaneous short circuit can recover immediately, for a long time short circuit
It can automatically prolong and again attempt to the time of output.
The above method is illustrated with a specific embodiment below, Fig. 2 shows one embodiment of the present of invention
Exchange line control machine communication overcurrent protection method idiographic flow schematic diagram, as shown in Fig. 2, in some illustrative embodiments
In, the method, including the following steps:
Step S201: detection over-current signal records the over-current signal number a detected；
Step S202: judge the affiliated section over-current signal number a detected；
In this step, voltage switching initial stage interference can be excluded and power on initial stage interference；If the over-current signal detected
Number a is less than or equal to 20 times, then continues to execute step S201, if the over-current signal number a detected is greater than 20 times, thens follow the steps
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 the affiliated section b；
In this step, if over-current signal counts b and is less than or equal to 10 times, i.e. over-current signal number a is less than or equal to 200, then
Execute step S206；It is greater than 10 times if over-current signal counts b, thens follow the steps S209；
Step S206: judgement stops the time of output pulse signal a cycle；
In this step, if the time for stopping output pulse signal a cycle arrives, S207 is thened follow the steps；If it is not, then
Execute step S208；In this step, by generating initial stage in over-current signal, stopping exports the very short time of a cycle, under
One period restored to export automatically, again attempts to restore electricity, solves the problems, such as instantaneous short circuit；
Step S207: control terminal voltage output simultaneously executes step S201；
Step S208: it continues waiting for exporting and executing step S205；
Step S209: overcurrent occurs history number c and adds 1；
Step S210: judge that the affiliated section history number c occurs for overcurrent；History number c occurs not according to overcurrent occurs
Together, the time trapezoidal increase that will stop output can automatically prolonging to prolonged short circuit and again attempt to the time of output, maximum journey
The protection analog device of degree, while can be automatic to restore output after short circuit removal；
In this step, if overcurrent occurs history number c and is less than or equal to 20 times, i.e. over-current signal number a is greater than 200 and small
In being equal to 4000, S211 is thened follow the steps；It is greater than 20 times if history number c occurs for overcurrent, i.e. over-current signal number a is greater than
4000, then follow the steps S212；
Step S211: stop output 20s, then control terminal voltage output；
Step S212: judge that the affiliated section history number c occurs for overcurrent；
In this step, if overcurrent occurs history number c and is greater than 20 times and is less than or equal to 40 times, i.e. over-current signal number a
Greater than 4000 and it is less than or equal between 8000, thens follow the steps S213；If history number c, which occurs, for overcurrent is greater than 40 times, i.e. overcurrent
Signal number a is greater than 8000, thens follow the steps 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 exchange line control machine communication overcurrent protection, the time trapezoidal increasing of output will be stopped
Add, in actual operation, if the affiliated section divided is excessive, device is easy overheat in the affiliated section, damages；If
The affiliated section divided is too small, then cannot carry out respectively for situations such as instantaneous short circuit, permanent short circuit or upper surge overcurrent defeated
It controls out.
Fig. 3 shows the schematic diagram of the device of exchange line control machine communication overcurrent protection of the invention.
As shown in figure 3, in some illustrative embodiments, the device 300 of the exchange line control machine communication overcurrent protection,
Include:
Detection unit 301: for detecting over-current signal；
Counting unit 302: the number for the over-current signal that statistic mixed-state arrives；
Execution unit 303: for the section according to belonging to the number, corresponding operation is executed.
In the above-described embodiments, the detection unit 301 detects exchange line control machine using over-current signal detection circuit
The number of over-current signal.
In some embodiments, the device of the exchange line control machine communication overcurrent protection, further includes judging unit 304, uses
In judging section belonging to the number, by the number successively with each threshold value comparison, affiliated section is judged:
If affiliated section, in first interval, counting unit includes count sub-element 3021, the every meter of count sub-element
After counting to certain number, such as 20 times, execution unit 303 stops output pulse signal a cycle, stops output a cycle
Time arrive, 303 control terminal voltage output of execution unit；
If affiliated section is in second interval, after execution unit 303 stops output first time interval, such as 20s,
Control terminal voltage output；
If affiliated section is in 3rd interval, after execution unit 303 stops the second time interval of output, such as
2min, control terminal voltage output；
If affiliated section exceeds affiliated 3rd interval, after execution unit 303 stops output third time interval, example
Such as 12min, control terminal voltage output.
Fig. 4 shows overcurrent used by the device of the exchange line control machine communication overcurrent protection of one embodiment of the present of invention
The schematic diagram of signal deteching circuit.Overcurrent letter as shown in Figure 4 can be used in the detection unit 301 for detecting over-current signal
Number detection circuit.The over-current signal detection circuit includes MCU, multiple resistance, multiple capacitors and multiple triodes.Wherein, electric
Mono- termination+12V current potential of R226 is hindered, and resistance R226 is in parallel with resistance R227；The emitter of triode P1 connects+12V current potential, base stage
It is connected with the resistance R226 other end, collector connects one end of resistance R228；The other end of resistance R228 is separately connected resistance
One end of R229 and capacitor C64 and the base stage of triode N18；The other end and triode N18 of resistance R229 and capacitor C64
Emitter be grounded respectively；The collector of triode N18 is separately connected one end of resistance R230 and resistance R231；Resistance R230's
Another termination+5V current potential；One end of another termination capacitor C65 of resistance R231, and export SHORT pin state；Capacitor C65
The other end ground connection.
In the over-current signal detection circuit, when the electric current for flowing through+12V current potential is more than 600mA, triode P1 is led
Logical, so that triode N18 is opened, SHORT pin state becomes low level from high level, thus generates over-current signal；MCU detection
To after over-current signal, and then the method according to the invention carries out the output control of line control machine power supply.
Fig. 5 shows the arrangement signal of the device of the exchange line control machine communication overcurrent protection of one embodiment of the present of invention
Figure.As shown in figure 5, the device of exchange line control machine communication overcurrent protection of the invention can be arranged in anti-chip and burn protective module
In.
The method and device thereof of exchange line control machine communication overcurrent protection of the invention are by the detection control program of over-current signal
It is refined, for same over-current signal, according to the difference of cumulative frequency, dynamic adjustment stops the time of output, greatly
The experience degree for improving user, while the safety of component itself can be protected to the greatest extent.
Claims (6)
1. a kind of method of exchange line control machine communication overcurrent protection, which is characterized in that the described method comprises the following steps:
Detect over-current signal；
The number for the over-current signal that statistic mixed-state arrives；
Judge section belonging to the number, executes corresponding operation；
The step of section belonging to the judgement number includes: that the number is judged institute successively with each threshold value comparison
The section of category；
It is described execute it is corresponding operation include:
If affiliated section is in first interval, after the over-current signal for often detecting certain number, stop output pulse signal
A cycle arrives when the time for stopping output a cycle, executes control terminal voltage output；
If affiliated section in second interval, stops after exporting first time interval, control terminal voltage output is executed
Step；
If affiliated section in 3rd interval, stops after exporting the second time interval, control terminal voltage output is executed
Step；
If affiliated section exceeds affiliated 3rd interval, stops after exporting third time interval, execute control terminal voltage
The step of output.
2. the method for exchange line control machine communication overcurrent protection according to claim 1, which is characterized in that the detection packet
It includes: the number of the over-current signal of detection exchange line control machine.
3. the method for exchange line control machine communication overcurrent protection according to claim 1, which is characterized in that the first interval
Less than or equal to 200；
The second interval be greater than 200 and be less than or equal to 4000, stop output first time interval when it is 20 seconds a length of；
The 3rd interval be greater than 4000 and be less than or equal to 8000, stop output the second time interval when it is 2 minutes a length of；
Section greater than 8000, stop output third time interval when it is 12 minutes a length of.
4. a kind of device of exchange line control machine communication overcurrent protection, which is characterized in that described device includes:
Detection unit: for detecting over-current signal；
Counting unit: the number for the over-current signal that statistic mixed-state arrives；
Execution unit: for the section according to belonging to the number, corresponding operation is executed；
Judging unit, for judging section belonging to the number, by the number successively with each threshold value comparison, belonging to judgement
Section；
If affiliated section, in first interval, counting unit includes count sub-element, after often counting down to certain number, execute
Unit stops output pulse signal a cycle, and the time for stopping output a cycle arrives, and execution unit control terminal voltage is defeated
Out；
If affiliated section, in second interval, control terminal voltage is defeated after execution unit stops output first time interval
Out；
If affiliated section, in 3rd interval, control terminal voltage is defeated after execution unit stops the second time interval of output
Out；
If affiliated section exceeds affiliated 3rd interval, execution unit stops control terminal electricity after output third time interval
Pressure output.
5. the device of exchange line control machine communication overcurrent protection according to claim 4, which is characterized in that the detection unit
For over-current signal detection circuit.
6. the device of exchange line control machine communication overcurrent protection according to claim 4, which is characterized in that described device arrangement
It is burnt in protective module in anti-chip.
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| 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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| CN101350512A (en) * | 2007-07-19 | 2009-01-21 | 佛山普立华科技有限公司 | Over current protective system |
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