CN102931647B - A kind of surge current suppression circuit and light fixture - Google Patents
A kind of surge current suppression circuit and light fixture Download PDFInfo
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- CN102931647B CN102931647B CN201110228309.2A CN201110228309A CN102931647B CN 102931647 B CN102931647 B CN 102931647B CN 201110228309 A CN201110228309 A CN 201110228309A CN 102931647 B CN102931647 B CN 102931647B
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Abstract
The present invention is applicable to protective circuit field, provides a kind of surge current suppression circuit and light fixture.Surge current suppression circuit of the present invention comprises resistor R1, relay K 1, switching tube and ceramic disc capacitor C1, circuit powered on moment, when the undertension at ceramic disc capacitor C1 two ends is to reach the threshold voltage of switch controlled end, switching tube is in off state, relay K 1 magnet spool loop is in open circuit, the switch of relay K 1 disconnects, electricity consumption load current loop needs to form performance loop through resistor R1, resistor R1 can eliminate the surge current that powered on moment produces, and after the surge current peak value past, when the voltage at ceramic disc capacitor C1 two ends reaches the threshold voltage of switch controlled end, switching tube is in conducting state, the switch of relay K 1 closes, resistor R1 is made to depart from operating circuit, this surge current suppression circuit volume is little, cost is low and can not reduce the electrical efficiency of protected circuit.
Description
Technical field
The invention belongs to protective circuit field, particularly relate to a kind of surge current suppression circuit and light fixture.
Background technology
At present in switching power circuit design; use a large amount of capacitive devices; electrochemical capacitor not only can as energy-storage travelling wave tube; and there is good filter action, so be widely applied, but the characteristic intrinsic according to electrochemical capacitor; electrochemical capacitor equals instantaneous short circuit at powered on moment; now can produce very large surge current (can 100A be reached), overcurrent protective device misoperation can be caused, bring serious inconvenience to user.
Now, the method for surge current suppression generally adopts surge suppressing device or Series power resistor to carry out the generation of surge current suppression, but the former volume is very large, expensive; Although the latter is with low cost, resistor meeting lot of energy, reduces the electrical efficiency of circuit greatly.
Summary of the invention
The object of the present invention is to provide a kind of surge current suppression circuit, be intended to solve present surge current suppression circuit and have that volume is large, cost intensive and the problem of electrical efficiency of protected circuit can be reduced.
The embodiment of the present invention is achieved in that a kind of surge current suppression circuit, is connected to power supply and with between electric loading, described surge current suppression circuit comprises:
Resistor R1, divider resistance R2, divider resistance R3, relay K 1, switching tube and ceramic disc capacitor C1;
Described resistor R1 is connected between the positive pole of described power supply and the power end by electric loading, the switch of described relay K 1 is in parallel with resistor R1, the switch of described relay K 1 is normal open switch, first contact and second contact of described switch remain open, the positive pole of power supply described in first termination of the electromagnet of described relay K 1, the hot end of switching tube described in second termination of the electromagnet of described relay K 1, the cold end of described switching tube connects the negative pole of described power supply and the ground end by electric loading simultaneously, between the positive pole that described divider resistance R2 and divider resistance R3 is serially connected in described power supply successively and negative pole, the public connecting end of described divider resistance R2 and divider resistance R3 connects the control end of described switching tube, between the control end that described ceramic disc capacitor C1 is connected to described switching tube and cold end.
Another object of the present invention is to provide a kind of light fixture, comprise lamp circuit, also comprise the surge current suppression circuit be connected between power supply and lamp circuit, described surge current suppression circuit comprises:
Resistor R1, divider resistance R2, divider resistance R3, relay K 1, switching tube and ceramic disc capacitor C1;
Between the positive pole that described resistor R1 is connected to described power supply and the power end of lamp circuit, the switch of described relay K 1 is in parallel with resistor R1, the switch of described relay K 1 is normal open switch, first contact and second contact of described switch remain open, the positive pole of power supply described in first termination of the electromagnet of described relay K 1, the hot end of switching tube described in second termination of the electromagnet of described relay K 1, the cold end of described switching tube connects the negative pole of described power supply and the ground end of lamp circuit simultaneously, between the positive pole that described divider resistance R2 and divider resistance R3 is serially connected in described power supply successively and negative pole, the public connecting end of described divider resistance R2 and divider resistance R3 connects the control end of described switching tube, between the control end that described ceramic disc capacitor C1 is connected to described switching tube and cold end.
In embodiments of the present invention, surge current suppression circuit comprises resistor R1, relay K 1, switching tube and ceramic disc capacitor C1, circuit powered on moment, when the undertension at ceramic disc capacitor C1 two ends is to reach the threshold voltage of switch controlled end, switching tube is in off state, relay K 1 magnet spool loop is in open circuit, the switch of relay K 1 disconnects, electricity consumption load current loop needs to form performance loop through resistor R1, resistor R1 can eliminate the surge current that powered on moment produces, and after the surge current peak value past, when the voltage at ceramic disc capacitor C1 two ends reaches the threshold voltage of switch controlled end, switching tube is in conducting state, the switch of relay K 1 closes, resistor R1 is made to depart from operating circuit, this surge current suppression circuit volume is little, cost is low and can not reduce the electrical efficiency of protected circuit.
Accompanying drawing explanation
The circuit structure diagram of the surge current suppression circuit that Fig. 1 provides for first embodiment of the invention;
The circuit structure diagram of the surge current suppression circuit that Fig. 2 provides for second embodiment of the invention;
The circuit structure diagram of the light fixture that Fig. 3 provides for first embodiment of the invention;
The circuit structure diagram of the light fixture that Fig. 4 provides for second embodiment of the invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Fig. 1 shows the circuit structure of the surge current suppression circuit that first embodiment of the invention provides, and for convenience of explanation, illustrate only the part relevant to the embodiment of the present invention, details are as follows.
Surge current suppression circuit 100, is connected to power supply and with between electric loading 200, surge current suppression circuit 100 comprises:
Resistor R1, divider resistance R2, divider resistance R3, relay K 1, switching tube 101 and ceramic disc capacitor C1;
Resistor R1 is connected between the positive pole of power supply and the power end by electric loading 200, the switch of relay K 1 is in parallel with resistor R1, the switch of relay K 1 is normal open switch, first contact and second contact of switch remain open, the positive pole of the first termination power of the electromagnet of relay K 1, the hot end of the second termination switching tube 101 of the electromagnet of relay K 1, the cold end of switching tube 101 connects the negative pole of power supply and the ground end by electric loading 200 simultaneously, divider resistance R2 and divider resistance R3 is serially connected between the positive pole of power supply and negative pole successively, the public connecting end of divider resistance R2 and divider resistance R3 connects the control end of switching tube 101, between the control end that ceramic disc capacitor C1 is connected to switching tube 101 and cold end.
As one embodiment of the invention, switching tube 101 is NPN type triode Q1, the base stage of NPN type triode Q1 is the control end of switching tube 101, the hot end of the current collection of NPN type triode Q1 very switching tube 101, the cold end of the transmitting of NPN type triode Q1 very switching tube 101.
Fig. 2 shows the circuit structure of the surge current suppression circuit that second embodiment of the invention provides, and for convenience of explanation, illustrate only the part relevant to the embodiment of the present invention, details are as follows.
As one embodiment of the invention, switching tube 101 is N-type metal-oxide-semiconductor Q2, and the grid of N-type metal-oxide-semiconductor Q2 is the control end of switching tube 101, and the drain electrode of N-type metal-oxide-semiconductor Q2 is the hot end of switching tube 101, and the source electrode of N-type metal-oxide-semiconductor Q2 is the cold end of switching tube 101.
The operation principle of this surge current suppression circuit is:
When switching on power; circuit powered on moment; when the undertension at ceramic disc capacitor C1 two ends is to reach the threshold voltage of switching tube 101 control end; switching tube 101 is in off state, and relay K 1 magnet spool loop is in open circuit, and the switch of relay K 1 disconnects; electricity consumption load current loop needs to form performance loop through resistor R1; the surge current of circuit powered on moment is just suppressed to a less value, avoids the generation of surge current, thus can avoid overcurrent protective device misoperation.
Along with passage of time, surge current peak value is gone over, circuital current is stablized, and ceramic disc capacitor C1 keeps charged state to make its both end voltage raise gradually always, when the voltage at ceramic disc capacitor C1 two ends reaches the threshold voltage of switching tube 101 control end, switching tube 101 is in conducting state, the switch of relay K 1 closes, resistor R1 is made to depart from operating circuit, current circuit forms performance loop through the switch of relay K 1, now circuit enters steady-working state, in stable state, because resistor R1 departs from operating circuit, so the electrical efficiency of circuit is unaffected.
The embodiment of the present invention also provides a kind of light fixture, and Fig. 3 shows the circuit structure of the light fixture that first embodiment of the invention provides, and for convenience of explanation, illustrate only the part relevant to the embodiment of the present invention, details are as follows.
Light fixture comprises lamp circuit 300, and also comprise the surge current suppression circuit 100 be connected between power supply and lamp circuit 300, surge current suppression circuit 100 comprises:
Resistor R1, divider resistance R2, divider resistance R3, relay K 1, switching tube 101 and ceramic disc capacitor C1;
Resistor R1 is connected between the positive pole of power supply and the power end of lamp circuit 300, the switch of relay K 1 is in parallel with resistor R1, the switch of relay K 1 is normal open switch, first contact and second contact of switch remain open, the positive pole of the first termination power of the electromagnet of relay K 1, the hot end of the second termination switching tube 101 of the electromagnet of relay K 1, the cold end of switching tube 101 connects the negative pole of power supply and the ground end of lamp circuit 300 simultaneously, divider resistance R2 and divider resistance R3 is serially connected between the positive pole of power supply and negative pole successively, the public connecting end of divider resistance R2 and divider resistance R3 connects the control end of switching tube 101, between the control end that ceramic disc capacitor C1 is connected to switching tube 101 and cold end.
As one embodiment of the invention, switching tube 101 is NPN type triode Q1, the base stage of NPN type triode Q1 is the control end of switching tube 101, the hot end of the current collection of NPN type triode Q1 very switching tube 101, the cold end of the transmitting of NPN type triode Q1 very switching tube 101.
Fig. 4 shows the circuit structure of the light fixture that second embodiment of the invention provides, and for convenience of explanation, illustrate only the part relevant to the embodiment of the present invention, details are as follows.
As one embodiment of the invention, switching tube 101 is N-type metal-oxide-semiconductor Q2, and the grid of N-type metal-oxide-semiconductor Q2 is the control end of switching tube 101, and the drain electrode of N-type metal-oxide-semiconductor Q2 is the hot end of switching tube 101, and the source electrode of N-type metal-oxide-semiconductor Q2 is the cold end of switching tube 101.
Relative to prior art, surge current suppression circuit of the present invention comprises resistor R1, relay K 1, switching tube and ceramic disc capacitor C1, circuit powered on moment, when the undertension at ceramic disc capacitor C1 two ends is to reach the threshold voltage of switch controlled end, switching tube is in off state, relay K 1 magnet spool loop is in open circuit, the switch of relay K 1 disconnects, electricity consumption load current loop needs to form performance loop through resistor R1, resistor R1 can eliminate the surge current that powered on moment produces, and after the surge current peak value past, when the voltage at ceramic disc capacitor C1 two ends reaches the threshold voltage of switch controlled end, switching tube is in conducting state, the switch of relay K 1 closes, resistor R1 is made to depart from operating circuit, this surge current suppression circuit volume is little, cost is low and can not reduce the electrical efficiency of protected circuit.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a surge current suppression circuit, be connected to power supply and with between electric loading, it is characterized in that, described surge current suppression circuit comprises:
Resistor R1, divider resistance R2, divider resistance R3, relay K 1, switching tube and ceramic disc capacitor C1;
Described resistor R1 is connected between the positive pole of described power supply and the power end by electric loading, the switch of described relay K 1 is in parallel with resistor R1, the switch of described relay K 1 is normal open switch, first contact and second contact of described normal open switch remain open, the positive pole of power supply described in first termination of the electromagnet of described relay K 1, the hot end of switching tube described in second termination of the electromagnet of described relay K 1, the cold end of described switching tube connects the negative pole of described power supply and the ground end by electric loading simultaneously, between the positive pole that described divider resistance R2 and divider resistance R3 is serially connected in described power supply successively and negative pole, the public connecting end of described divider resistance R2 and divider resistance R3 connects the control end of described switching tube, between the control end that described ceramic disc capacitor C1 is connected to described switching tube and cold end,
When switching on power, circuit powered on moment, when the undertension at ceramic disc capacitor C1 two ends is to reach the threshold voltage of switch controlled end, switching tube is in off state, and relay K 1 magnet spool loop is in open circuit, and the switch of relay K 1 disconnects, electricity consumption load current loop needs to form performance loop through resistor R1, the surge current of circuit powered on moment is just suppressed, avoids the generation of surge current, thus avoids overcurrent protective device misoperation;
Along with passage of time, surge current peak value is gone over, circuital current is stablized, and ceramic disc capacitor C1 keeps charged state to make its both end voltage raise gradually always, when the voltage at ceramic disc capacitor C1 two ends reaches the threshold voltage of switch controlled end, switching tube is in conducting state, the switch of relay K 1 closes, resistor R1 is made to depart from operating circuit, current circuit forms performance loop through the switch of relay K 1, now circuit enters steady-working state, in stable state, because resistor R1 departs from operating circuit, so the electrical efficiency of circuit is unaffected.
2. surge current suppression circuit as claimed in claim 1, it is characterized in that, described switching tube is NPN type triode Q1, the base stage of described NPN type triode Q1 is the control end of described switching tube, the hot end of the very described switching tube of current collection of described NPN type triode Q1, the cold end of the very described switching tube of transmitting of described NPN type triode Q1.
3. surge current suppression circuit as claimed in claim 1, it is characterized in that, described switching tube is N-type metal-oxide-semiconductor Q2, the grid of described N-type metal-oxide-semiconductor Q2 is the control end of described switching tube, the drain electrode of described N-type metal-oxide-semiconductor Q2 is the hot end of described switching tube, and the source electrode of described N-type metal-oxide-semiconductor Q2 is the cold end of described switching tube.
4. a light fixture, comprises lamp circuit, also comprises the surge current suppression circuit be connected between power supply and lamp circuit, it is characterized in that, described surge current suppression circuit comprises:
Resistor R1, divider resistance R2, divider resistance R3, relay K 1, switching tube and ceramic disc capacitor C1;
Between the positive pole that described resistor R1 is connected to described power supply and the power end of lamp circuit, the switch of described relay K 1 is in parallel with resistor R1, the switch of described relay K 1 is normal open switch, first contact and second contact of described normal open switch remain open, the positive pole of power supply described in first termination of the electromagnet of described relay K 1, the hot end of switching tube described in second termination of the electromagnet of described relay K 1, the cold end of described switching tube connects the negative pole of described power supply and the ground end of lamp circuit simultaneously, between the positive pole that described divider resistance R2 and divider resistance R3 is serially connected in described power supply successively and negative pole, the public connecting end of described divider resistance R2 and divider resistance R3 connects the control end of described switching tube, between the control end that described ceramic disc capacitor C1 is connected to described switching tube and cold end,
When switching on power, circuit powered on moment, when the undertension at ceramic disc capacitor C1 two ends is to reach the threshold voltage of switch controlled end, switching tube is in off state, and relay K 1 magnet spool loop is in open circuit, and the switch of relay K 1 disconnects, electricity consumption load current loop needs to form performance loop through resistor R1, the surge current of circuit powered on moment is just suppressed, avoids the generation of surge current, thus avoids overcurrent protective device misoperation;
Along with passage of time, surge current peak value is gone over, circuital current is stablized, and ceramic disc capacitor C1 keeps charged state to make its both end voltage raise gradually always, when the voltage at ceramic disc capacitor C1 two ends reaches the threshold voltage of switch controlled end, switching tube is in conducting state, the switch of relay K 1 closes, resistor R1 is made to depart from operating circuit, current circuit forms performance loop through the switch of relay K 1, now circuit enters steady-working state, in stable state, because resistor R1 departs from operating circuit, so the electrical efficiency of circuit is unaffected.
5. light fixture as claimed in claim 4, it is characterized in that, described switching tube is NPN type triode Q1, the base stage of described NPN type triode Q1 is the control end of described switching tube, the hot end of the very described switching tube of current collection of described NPN type triode Q1, the cold end of the very described switching tube of transmitting of described NPN type triode Q1.
6. light fixture as claimed in claim 4, it is characterized in that, described switching tube is N-type metal-oxide-semiconductor Q2, the grid of described N-type metal-oxide-semiconductor Q2 is the control end of described switching tube, the drain electrode of described N-type metal-oxide-semiconductor Q2 is the hot end of described switching tube, and the source electrode of described N-type metal-oxide-semiconductor Q2 is the cold end of described switching tube.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110228309.2A CN102931647B (en) | 2011-08-10 | 2011-08-10 | A kind of surge current suppression circuit and light fixture |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110228309.2A CN102931647B (en) | 2011-08-10 | 2011-08-10 | A kind of surge current suppression circuit and light fixture |
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| CN102931647A CN102931647A (en) | 2013-02-13 |
| CN102931647B true CN102931647B (en) | 2016-03-02 |
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| CN201110228309.2A Active CN102931647B (en) | 2011-08-10 | 2011-08-10 | A kind of surge current suppression circuit and light fixture |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103825263B (en) * | 2012-11-16 | 2018-10-12 | 海洋王（东莞）照明科技有限公司 | Source of stable pressure starting protection circuit and power panel test circuit |
| WO2014190837A1 (en) * | 2013-05-30 | 2014-12-04 | Liao Shunan | Power supply apparatus for low-temperature led lighting |
| CN104640293A (en) * | 2013-11-13 | 2015-05-20 | 深圳市海洋王照明工程有限公司 | Protection circuit |
| CN108964437A (en) * | 2018-06-07 | 2018-12-07 | 广州市普今电子科技有限公司 | A kind of circuit promoting starting capacitance load capability |
| CN109217273A (en) * | 2018-11-20 | 2019-01-15 | 艾乐德电子（南京）有限公司 | One kind turning off the power switch undelayed anti-surge circuit |
| CN109755926A (en) * | 2019-03-22 | 2019-05-14 | 常州市赛尔交通器材有限公司 | Bullet train distribution board and headlamp combined power supply system dash current protective device |
| CN112865050B (en) * | 2019-11-27 | 2022-07-19 | 明纬(广州)电子有限公司 | Adaptive regulation surge current limiter |
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| CN101871580A (en) * | 2009-04-23 | 2010-10-27 | 苏州市昆士莱照明科技有限公司 | Light-operated LED (liquid crystal diode) lamp |
| CN102013664A (en) * | 2010-12-13 | 2011-04-13 | 海信科龙电器股份有限公司 | Protection device for transformer |
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| JP2008125339A (en) * | 2006-10-17 | 2008-05-29 | Kanazawa Inst Of Technology | Inrush current prevention circuit, load drive circuit, and light-emitting device using them |
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| CN101871580A (en) * | 2009-04-23 | 2010-10-27 | 苏州市昆士莱照明科技有限公司 | Light-operated LED (liquid crystal diode) lamp |
| CN201523320U (en) * | 2009-06-09 | 2010-07-07 | 中兴通讯股份有限公司 | Slow start device of direct current power supply |
| CN102013664A (en) * | 2010-12-13 | 2011-04-13 | 海信科龙电器股份有限公司 | Protection device for transformer |
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