CN109275231B - Protection control circuit for preventing surge impact or current abrupt change - Google Patents
Protection control circuit for preventing surge impact or current abrupt change Download PDFInfo
- Publication number
- CN109275231B CN109275231B CN201811254960.5A CN201811254960A CN109275231B CN 109275231 B CN109275231 B CN 109275231B CN 201811254960 A CN201811254960 A CN 201811254960A CN 109275231 B CN109275231 B CN 109275231B
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- China
- Prior art keywords
- circuit
- transformer
- control circuit
- rectifying
- connects
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- 239000003990 capacitor Substances 0.000 claims abstract description 22
- 238000005070 sampling Methods 0.000 claims abstract description 17
- 238000001914 filtration Methods 0.000 claims abstract description 12
- 230000036632 reaction speed Effects 0.000 description 2
- 206010035148 Plague Diseases 0.000 description 1
- 241000607479 Yersinia pestis Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Abstract
The invention discloses a protection control circuit for preventing surge impact or current abrupt change, which comprises a transformer, wherein one end of the primary side of the transformer is connected with an electromagnetic filtering/rectifying circuit, the electromagnetic filtering/rectifying circuit is connected with a live wire and a zero wire of a commercial power, the connection part of the electromagnetic filtering/rectifying circuit and the primary side of the transformer is connected with the control circuit, the other end of the primary side of the transformer is connected with a drain electrode of a switching tube, a gate electrode of the switching tube is connected with the control circuit, a source electrode of the switching tube is connected with a sampling circuit, the grounding end of the sampling circuit is grounded, the sampling circuit is connected with the control circuit through a feedback circuit, the secondary side of the transformer is connected with the rectifying/rectifying circuit, the rectifying/rectifying circuit is connected with a positive wiring end of a load and a negative wiring end of the load, and two ends of the feedback circuit are connected with a capacitor in parallel. The structure can avoid the damage of devices such as a switch tube of the circuit and the like, and protect the whole circuit from normal operation.
Description
Technical Field
The invention relates to the field of circuits, in particular to a protection control circuit for preventing surge impact or current abrupt change.
Background
The damage rate of the existing LED lighting lamp is very high under the lightning environment or under the high-energy harmonic surge impact, namely the most fatal reasons which plague the popularization and application of the LED lighting so far are solved. Once the LED driving power supply and the whole lighting lamp are struck by lightning or under the impact of high-energy harmonic surges, the instantaneous high-energy surges are generated between the L, N lines of the input end of the LED driving power supply and enter the lines of the LED driving power supply, so that main circuit devices of the LED driving power supply, such as a switching tube, a rectifier diode and the like, are broken down and damaged by the instantaneous high-current surges.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a protection control circuit for preventing surge impact or current abrupt change.
The technical scheme adopted for solving the technical problems is as follows:
the utility model provides a protection control circuit of protection against surge impact or electric current abrupt change, includes the transformer, the one end of transformer primary side connects electromagnetic wave filtering/rectifier circuit, electromagnetic wave filtering/rectifier circuit connects live wire and the zero line of commercial power, electromagnetic wave filtering/rectifier circuit and transformer primary side junction connect control circuit, the other end of transformer primary side connects control circuit through the drain electrode that connects the switch tube, and the source of switch tube connects sampling circuit, sampling circuit's ground connection, sampling circuit connects control circuit through connecing feedback circuit, the secondary side rectifier/filter circuit of transformer, the positive terminal of rectifier/filter circuit connection load and the negative terminal of load, a parallel electric capacity in feedback circuit's both ends.
Preferably, the connection part of the control circuit and the feedback circuit is connected to the grounding end of the sampling circuit through the grounding capacitor, so that the reaction speed of the control circuit is accelerated.
Preferably, the grounding capacitor can filter noise, and the capacitance value of the capacitor is larger than that of the grounding capacitor, so that the control circuit senses overcurrent and reacts in time more quickly.
The beneficial effects are that:
according to the scheme, the sampling circuit is connected with the control circuit through the feedback circuit, and two ends of the feedback circuit are connected with a capacitor in parallel. When surge is impacted, the generated overcurrent passes through the capacitors connected in parallel at two ends of the feedback circuit when passing through the feedback circuit, so that the control circuit can quickly sense the existence of the overcurrent and make timely response, the damage of a switching tube of the circuit is avoided, and the normal working and running of the whole circuit are protected.
Drawings
The invention will be further described with reference to the drawings and examples.
FIG. 1 is an embodiment of the present invention;
FIG. 2 is another embodiment of the present invention;
fig. 3 is a specific application of the invention in a circuit.
Detailed Description
Referring to fig. 1, an embodiment of the present invention provides a protection control circuit for preventing surge impact or current abrupt change, which includes a transformer T, wherein one end of a primary side of the transformer T is connected to an electromagnetic filtering/rectifying circuit 1, the electromagnetic filtering/rectifying circuit 1 is connected to a live wire L and a neutral wire N of a mains supply, a connection part of the electromagnetic filtering/rectifying circuit 1 and the primary side of the transformer T is connected to a control circuit 2, the other end of the primary side of the transformer T is connected to a drain electrode of a switching tube Q, a gate of the switching tube Q is connected to the control circuit 1, a source of the switching tube Q is connected to a sampling circuit 3, a ground of the sampling circuit 3 is connected to the control circuit 2 through a feedback circuit 5, a secondary side of the transformer T is connected to a rectifying/rectifying circuit 4, the rectifying/rectifying circuit 4 is connected to a positive terminal led+ of a load and a negative terminal LED-, and two ends of the feedback circuit 5 are connected to a capacitor C in parallel.
The connection part of the control circuit 2 and the feedback circuit 5 is connected to the grounding end of the sampling circuit 3 through a grounding capacitor C1, the grounding capacitor can filter noise, and the reaction speed of the control circuit 2 is accelerated
The capacitance value of the capacitor C is larger than that of the grounding capacitor C1, so that the control circuit 2 can sense overcurrent and react in time more quickly.
The sampling circuit 3 is connected with the control circuit 2 through the feedback circuit 5, and two ends of the feedback circuit 5 are connected with a capacitor C in parallel. When surge is impacted, the generated overcurrent passes through the capacitor C connected with the two ends of the feedback circuit 5 in parallel when passing through the feedback circuit 5, so that the control circuit 2 can quickly sense the existence of the overcurrent, the switching tube Q is forced to be closed or the duty ratio is regulated, the damage of the switching tube Q of the circuit is avoided, and the normal working and running of the whole circuit are protected.
In this technical scheme, the primary side of the transformer may be connected with one or more circuits with sampling circuits, as shown in fig. 2, and the capacitor C2 and the capacitor C3 are respectively capacitors connected in parallel at two ends of two feedback circuits.
As long as the circuit connected with the primary side of the transformer is connected with the sampling circuit through the feedback circuit, the mode of the feedback circuit parallel capacitor in the technical scheme can be adopted to ensure that a switching tube or a rectifying diode in the circuit cannot be damaged due to surge impact.
Fig. 3 shows a specific application of the technical scheme in a circuit.
The present invention is not limited to the above embodiments, but can be achieved by any similar or identical means.
Claims (1)
1. The utility model provides a protection control circuit of protection against surge impact or electric current abrupt change, includes the transformer, the one end of transformer's primary side connects electromagnetic wave filtering/rectifier circuit, electromagnetic wave filtering/rectifier circuit connects live wire and zero line of commercial power, electromagnetic wave filtering/rectifier circuit and transformer's primary side junction connect control circuit, the other end of transformer primary side connects control circuit through the drain electrode that connects the switch tube, the source of switch tube connects sampling circuit's earthing terminal ground connection, sampling circuit connects control circuit through connecing feedback circuit, the secondary side of transformer connects rectifying/filter circuit, rectifying/filter circuit connects the positive terminal of load and the negative terminal of load, its characterized in that:
two ends of the feedback circuit are connected with a capacitor in parallel;
the connection part of the control circuit and the feedback circuit is connected to the grounding end of the sampling circuit through a grounding capacitor, and the capacitance value of the capacitor is larger than that of the grounding capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811254960.5A CN109275231B (en) | 2018-10-26 | 2018-10-26 | Protection control circuit for preventing surge impact or current abrupt change |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811254960.5A CN109275231B (en) | 2018-10-26 | 2018-10-26 | Protection control circuit for preventing surge impact or current abrupt change |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109275231A CN109275231A (en) | 2019-01-25 |
| CN109275231B true CN109275231B (en) | 2024-03-19 |
Family
ID=65194341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811254960.5A Active CN109275231B (en) | 2018-10-26 | 2018-10-26 | Protection control circuit for preventing surge impact or current abrupt change |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109275231B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060001135A (en) * | 2004-06-30 | 2006-01-06 | 삼성전기주식회사 | Adapter with improved surge protection function |
| CN102083249A (en) * | 2009-11-30 | 2011-06-01 | 康佳集团股份有限公司 | LED (light-emitting diode) lighting circuit |
| CN203590550U (en) * | 2013-11-06 | 2014-05-07 | 江苏石诺节能科技股份有限公司 | Large-power LED lamp realized by adopting voltage-isolated fly-back controller |
| CN106341047A (en) * | 2016-08-09 | 2017-01-18 | 张超莲 | Practical switching power supply |
| WO2017097002A1 (en) * | 2015-12-09 | 2017-06-15 | 深圳欧陆通电子有限公司 | Anti-surge switching power supply and anti-surge circuit |
| CN209488861U (en) * | 2018-10-26 | 2019-10-11 | 佛山市华全电气照明有限公司 | A kind of protection control circuit of Anti-surging impact or current break |
-
2018
- 2018-10-26 CN CN201811254960.5A patent/CN109275231B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060001135A (en) * | 2004-06-30 | 2006-01-06 | 삼성전기주식회사 | Adapter with improved surge protection function |
| CN102083249A (en) * | 2009-11-30 | 2011-06-01 | 康佳集团股份有限公司 | LED (light-emitting diode) lighting circuit |
| CN203590550U (en) * | 2013-11-06 | 2014-05-07 | 江苏石诺节能科技股份有限公司 | Large-power LED lamp realized by adopting voltage-isolated fly-back controller |
| WO2017097002A1 (en) * | 2015-12-09 | 2017-06-15 | 深圳欧陆通电子有限公司 | Anti-surge switching power supply and anti-surge circuit |
| CN106341047A (en) * | 2016-08-09 | 2017-01-18 | 张超莲 | Practical switching power supply |
| CN209488861U (en) * | 2018-10-26 | 2019-10-11 | 佛山市华全电气照明有限公司 | A kind of protection control circuit of Anti-surging impact or current break |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109275231A (en) | 2019-01-25 |
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