CN102148500A - Unique lightning protection circuit of LED (light-emitting diode) power supply - Google Patents
Unique lightning protection circuit of LED (light-emitting diode) power supply Download PDFInfo
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- CN102148500A CN102148500A CN201110063239XA CN201110063239A CN102148500A CN 102148500 A CN102148500 A CN 102148500A CN 201110063239X A CN201110063239X A CN 201110063239XA CN 201110063239 A CN201110063239 A CN 201110063239A CN 102148500 A CN102148500 A CN 102148500A
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Abstract
The invention discloses a unique lightning protection circuit of an LED (light-emitting diode) power supply, which comprises live wires, zero lines, a common mode inductor LF1, and a common mode inductor LF2; a piezoresistor MOV3 and a piezoresistor MOV4 connected in series are spanned between the live wires and the zero lines; a filter capacitor C1 is spanned between the live wire and the zero line at the backward stage of the piezoresistor MOV3 and the piezoresistor MOV4; the common mode inductor LF1 is connected in series with the live wire and the zero line at the backward stage of the filter capacitor C1; the common mode inductor LF2 is connected in series with the live wire and the zero line at the backward stage of the common mode inductor LF1; a piezoresistor MOV2 is spanned between the live wire and the zero line between the common mode inductor LF1 and the common mode inductor LF2; and a piezoresistor MOV1 is spanned between the live wire and the zero line outputted by the common mode inductor LF2. The unique lightning protection circuit of the LED (light-emitting diode) power supply has simple structure, does not need additional circuits, reduces the production cost, can satisfy A-grade lightning protection requirements with a safety common mode of 4KV and a differential mode of 2KV, and can satisfy the requirement of Hi-Pot simultaneously.
Description
Technical field
The present invention discloses the LED power lightning protection circuit of a kind of lightning protection circuit, particularly a kind of uniqueness.
Background technology
Along with the development of LED lighting technology, the power supply of giving the power supply of LED illuminating equipment is also in continuous progress.At present; the power supply 220V civil power access of employing usually to the LED power supply; the prime that inserts at civil power; a lightning protection circuit can be set usually; in the prior art; the lightening arresting method of more use is the discharge tube that is connected with piezo-resistance+3000V of 470V between elementary zero line and live wire; high pressure thunderbolt is caused that the earth releases; this kind mode is just started with from cutting down the thunderbolt energy; there is obvious deficiency; be because the bad control of discharge tube parameter error is to carry out clamper to the main circuit operating voltage partly of back level, so the lightning protection effect consistency is relatively poor on the other hand on the one hand.
Summary of the invention
At the relatively poor shortcoming of the lightning protection effect consistency of the above-mentioned lightning protection circuit of mentioning of the prior art, the invention provides a kind of LED power lightning protection circuit of new uniqueness, it on the one hand can be by the piezo-resistance MOV2 between live wire and the zero line, piezo-resistance MOV1 basis phase place separately, carry out energy discharge through capacitor C Y1 and capacitor C Y2 to the earth, by piezo-resistance MOV3 and piezo-resistance MOV4 main circuit is partly carried out voltage clamp on the other hand, carry out energy through capacitor C Y3 and capacitor C Y4 to the earth again and release.
The technical scheme that the present invention solves its technical problem employing is: a kind of LED power lightning protection circuit of uniqueness, lightning protection circuit comprises live wire, zero line, cross-over connection has piezo-resistance MOV3 and the piezo-resistance MOV4 that is connected in series between common mode inductance LF1 and common mode inductance LF2 live wire and the zero line, behind piezo-resistance MOV3 and the piezo-resistance MOV4 level live wire and zero line between cross-over connection filter capacitor C2 is arranged, be serially connected with common mode inductance LF1 on the live wire of level and the zero line behind the filter capacitor C2, common mode inductance LF2 is serially connected on the live wire and zero line of level behind the common mode inductance LF1, cross-over connection has piezo-resistance MOV2 between live wire between common mode inductance LF1 and the common mode inductance LF2 and the zero line, and cross-over connection has piezo-resistance MOV1 between the live wire of common mode inductance LF2 output and the zero line.
A kind of LED power circuit that adopts the LED power lightning protection circuit of above-mentioned uniqueness, the LED power circuit comprises lightning protection circuit, power source conversion part and power supply output, lightning protection circuit is connected power source conversion part prime, external power supply is through lightning protection circuit input power source conversion part, after power source conversion is partly changed, through power supply output output driving LED, the negative pole of power supply output is connected with the earth through capacitor C Y4 again.
The technical scheme that the present invention solves its technical problem employing further comprises:
Cross-over connection has filter capacitor C2 between live wire between described common mode inductance LF1 and the common mode inductance LF2 and the zero line, and filter capacitor C2 is connected level behind the piezo-resistance MOV2.
Live wire between described common mode inductance LF1 and the common mode inductance LF2 and zero line are connected to the earth by capacitor C Y1 and capacitor C Y2 respectively.
The common port of described piezo-resistance MOV3 and piezo-resistance MOV4 is connected to elementary ground.
The common port of described piezo-resistance MOV3 and piezo-resistance MOV4 is connected to secondary ground by the capacitor C Y3 of serial connection.
Cross-over connection has resistance R 1, resistance R 2 and the resistance R 3 that is connected in series between described live wire and the zero line, and resistance R 1, resistance R 2 and resistance R 3 are connected between piezo-resistance MOV3 and piezo-resistance MOV4 and the filter capacitor C1.
Be serially connected with protective tube F1 on the described live wire input.
Be serially connected with thermistor RT1 on the described zero line input.
Described power source conversion partly is a switching power circuit.
The invention has the beneficial effects as follows: circuit structure of the present invention is simple, need not to increase extra circuit, reduced production cost, it can satisfy safety common mode 4KV, the A level lightning protection requirement of differential mode 2KV, simultaneously, can satisfy the Hi-Pot requirement, after regulating relevant parameter, the present invention also can realize common mode 6KV, the requirement of differential mode 6KV easily.
The present invention will be further described below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is circuit theory diagrams of the present invention.
Fig. 2 is an application circuit block diagram of the present invention.
Fig. 3 is an application circuit schematic diagram of the present invention.
Embodiment
Present embodiment is the preferred embodiment for the present invention, and other all its principles are identical with present embodiment or approximate with basic structure, all within protection range of the present invention.
Please referring to accompanying drawing 1, lightning protection circuit among the present invention mainly comprises live wire, two incoming lines of zero line, article two, incoming line, article two, be connected with common mode inductance LF1 and common mode inductance LF2 two-stage transformation on the incoming line, in the present embodiment, be serially connected with protective tube F1 on the prime of the input of live wire, be serially connected with thermistor RT1 on the prime of the input of zero line.Among the present invention, cross-over connection has piezo-resistance MOV3 and the piezo-resistance MOV4 that is connected in series between live wire and zero line, the common port of piezo-resistance MOV3 and piezo-resistance MOV4 is connected to elementary ground, simultaneously, the common port of piezo-resistance MOV3 and piezo-resistance MOV4 is connected to secondary ground by the capacitor C Y3 of serial connection, and main circuit is partly carried out voltage clamp.In the present embodiment, behind piezo-resistance MOV3 and the piezo-resistance MOV4 level live wire and zero line between cross-over connection filter capacitor C1 is arranged, cross-over connection has resistance R 1, resistance R 2 and the resistance R 3 that is connected in series between live wire and the zero line, and resistance R 1, resistance R 2 and resistance R 3 are connected between piezo-resistance MOV3 and piezo-resistance MOV4 and the filter capacitor C1.Common mode inductance LF1 is serially connected on the live wire and zero line of level behind the filter capacitor C1, common mode inductance LF2 is serially connected on the live wire and zero line of level behind the common mode inductance LF1, cross-over connection has piezo-resistance MOV2 between live wire between common mode inductance LF1 and the common mode inductance LF2 and the zero line, cross-over connection has filter capacitor C2 between live wire between common mode inductance LF1 and the common mode inductance LF2 and the zero line, filter capacitor C2 is connected level behind the piezo-resistance MOV2, in the present embodiment, live wire between common mode inductance LF1 and the common mode inductance LF2 and zero line are connected to the earth by capacitor C Y1 and capacitor C Y2 respectively, energy is released, cross-over connection has piezo-resistance MOV1 between the live wire of common mode inductance LF2 output and the zero line, and common mode inductance LF2 output promptly connects power conversion circuits as output of the present invention.
Please referring to accompanying drawing 2 and accompanying drawing 3, be applied to example in the typical LED driving switch power supply for the present invention shown in accompanying drawing 2 and the accompanying drawing 3, promptly use the LED power circuit of above-mentioned lightning protection circuit, it mainly comprises lightning protection circuit, power source conversion part and power supply output, in the present embodiment, power source conversion partly adopts typical switching power circuit, lightning protection circuit is connected power source conversion part prime, external power supply is through lightning protection circuit input power source conversion part, after power source conversion is partly changed, through power supply output output driving LED, the negative pole of described power supply output is connected with the earth through capacitor C Y4 again.Wherein, the present invention is connected the prime of input of switching power circuit.
One aspect of the present invention be by between live wire and the zero line and piezo-resistance MOV2 and piezo-resistance MOV1 be connected to the earth according to separately phase place through capacitor C Y1 and capacitor C Y2 and carry out energy and release, by piezo-resistance MOV3 and piezo-resistance MOV4 main circuit is partly carried out voltage clamp on the other hand, carry out energy through capacitor C Y3 and capacitor C Y4 to the earth again and release.The operating voltage that can guarantee main circuit after above-mentioned processing is subjected to the influence of lightning surge to drop to minimum; and then the capacitor C 5 of the overvoltage protection of main circuit part carried out parameter adjustment; make its delay time greater than 28uS; can guarantee that circuit does not produce misoperation; thereby make output voltage can not produce interruption, satisfy A level lightning protection requirement.
Circuit structure of the present invention is simple, and need not increases extra circuit, has reduced production cost, and it can satisfy safety common mode 4KV, the A level lightning protection requirement of differential mode 2KV simultaneously, can be satisfied the Hi-Pot requirement, after regulating relevant parameter, the present invention also can realize common mode 6KV, the requirement of differential mode 6KV easily.
Claims (10)
1. the LED power lightning protection circuit of a uniqueness, it is characterized in that: described lightning protection circuit comprises live wire, zero line, common mode inductance LF1 and common mode inductance LF2, cross-over connection has piezo-resistance MOV3 and the piezo-resistance MOV4 that is connected in series between live wire and the zero line, behind piezo-resistance MOV3 and the piezo-resistance MOV4 level live wire and zero line between cross-over connection filter capacitor C1 is arranged, be serially connected with common mode inductance LF1 on the live wire of level and the zero line behind the filter capacitor C1, common mode inductance LF2 group is serially connected on the live wire and zero line of level behind the common mode inductance LF1, cross-over connection has piezo-resistance MOV2 between live wire between common mode inductance LF1 and the common mode inductance LF2 and the zero line, and cross-over connection has piezo-resistance MOV1 between the live wire of common mode inductance LF2 output and the zero line.
2. the LED power lightning protection circuit of uniqueness according to claim 1, it is characterized in that: cross-over connection has filter capacitor C2 between live wire between described common mode inductance LF1 and the common mode inductance LF2 and the zero line, and filter capacitor C2 is connected level behind the piezo-resistance MOV2.
3. the LED power lightning protection circuit of uniqueness according to claim 1, it is characterized in that: live wire between described common mode inductance LF1 and the common mode inductance LF2 and zero line are connected to the earth by capacitor C Y1 and capacitor C Y2 respectively.
4. the LED power lightning protection circuit of uniqueness according to claim 1 is characterized in that: the common port of described piezo-resistance MOV3 and piezo-resistance MOV4 is connected to elementary ground.
5. the LED power lightning protection circuit of uniqueness according to claim 1 is characterized in that: the common port of described piezo-resistance MOV3 and piezo-resistance MOV4 is connected to secondary ground by the capacitor C Y3 of serial connection.
6. the LED power lightning protection circuit of uniqueness according to claim 1, it is characterized in that: cross-over connection has resistance R 1, resistance R 2 and the resistance R 3 that is connected in series between described live wire and the zero line, and resistance R 1, resistance R 2 and resistance R 3 are connected between piezo-resistance MOV3 and piezo-resistance MOV4 and the filter capacitor C1.
7. according to the LED power lightning protection circuit of any described uniqueness in the claim 1 to 6, it is characterized in that: be serially connected with protective tube F1 on the described live wire input.
8. according to the LED power lightning protection circuit of any described uniqueness in the claim 1 to 6, it is characterized in that: be serially connected with thermistor RT1 on the described zero line input.
9. LED power circuit that adopts the LED power lightning protection circuit of uniqueness as claimed in claim 1, it is characterized in that: described LED power circuit comprises lightning protection circuit, power source conversion part and power supply output, lightning protection circuit is connected power source conversion part prime, external power supply is through lightning protection circuit input power source conversion part, after power source conversion is partly changed, through power supply output output driving LED, the negative pole of described power supply output is connected with the earth through capacitor C Y4 again.
10. LED power circuit according to claim 9 is characterized in that: described power source conversion partly is switching power circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110063239XA CN102148500A (en) | 2011-03-16 | 2011-03-16 | Unique lightning protection circuit of LED (light-emitting diode) power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110063239XA CN102148500A (en) | 2011-03-16 | 2011-03-16 | Unique lightning protection circuit of LED (light-emitting diode) power supply |
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| CN102148500A true CN102148500A (en) | 2011-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110063239XA Pending CN102148500A (en) | 2011-03-16 | 2011-03-16 | Unique lightning protection circuit of LED (light-emitting diode) power supply |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102594122A (en) * | 2012-02-23 | 2012-07-18 | 福建捷联电子有限公司 | Power adaptor |
| CN103368139A (en) * | 2012-03-27 | 2013-10-23 | 苏州工业园区新宏博通讯科技有限公司 | Transformer protection circuit |
| CN103682861A (en) * | 2013-12-17 | 2014-03-26 | 北京东方计量测试研究所 | Modularization socket |
| CN106100302A (en) * | 2016-08-22 | 2016-11-09 | 重庆大及电子科技有限公司 | A kind of novel filtering unit |
| CN107800287A (en) * | 2016-09-05 | 2018-03-13 | 广东美的生活电器制造有限公司 | Household electrical appliance and its EMC circuits |
| CN109287050A (en) * | 2018-10-26 | 2019-01-29 | 株洲市众普森技术有限公司 | A kind of output and light adjusting circuit |
| CN117060363A (en) * | 2023-10-10 | 2023-11-14 | 广东东菱电源科技有限公司 | Low-cost lightning-proof surge circuit |
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| CN101764401A (en) * | 2010-03-08 | 2010-06-30 | 福建捷联电子有限公司 | Practical and reliable lightningproof circuit |
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| JP2003348749A (en) * | 2002-05-30 | 2003-12-05 | Nippon Telegraph & Telephone East Corp | Lightning-preventing adapter for power source line |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102594122A (en) * | 2012-02-23 | 2012-07-18 | 福建捷联电子有限公司 | Power adaptor |
| CN102594122B (en) * | 2012-02-23 | 2014-09-17 | 福建捷联电子有限公司 | Power adaptor |
| CN103368139A (en) * | 2012-03-27 | 2013-10-23 | 苏州工业园区新宏博通讯科技有限公司 | Transformer protection circuit |
| CN103682861A (en) * | 2013-12-17 | 2014-03-26 | 北京东方计量测试研究所 | Modularization socket |
| CN103682861B (en) * | 2013-12-17 | 2016-08-17 | 北京东方计量测试研究所 | A kind of modular jack |
| CN106100302A (en) * | 2016-08-22 | 2016-11-09 | 重庆大及电子科技有限公司 | A kind of novel filtering unit |
| CN106100302B (en) * | 2016-08-22 | 2019-02-19 | 重庆大及电子科技有限公司 | A kind of novel filtering unit |
| CN107800287A (en) * | 2016-09-05 | 2018-03-13 | 广东美的生活电器制造有限公司 | Household electrical appliance and its EMC circuits |
| CN109287050A (en) * | 2018-10-26 | 2019-01-29 | 株洲市众普森技术有限公司 | A kind of output and light adjusting circuit |
| CN117060363A (en) * | 2023-10-10 | 2023-11-14 | 广东东菱电源科技有限公司 | Low-cost lightning-proof surge circuit |
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Address after: Shenzhen Nanshan District City, Guangdong province 518108 industrial park outside the small pine Tai Bai Lu Bai mang mulberry 6 layer Applicant after: MOSO Power Supply Technology Co., Ltd. Address before: Shenzhen Nanshan District City, Guangdong province 518108 industrial park outside the small pine Tai Bai Lu Bai mang mulberry 6 layer Applicant before: Shenzhen MoSo Power Supply Technology Co., Ltd. |
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Free format text: CORRECT: APPLICANT; FROM: SHENZHEN MOSO POWER SUPPLY TECHNOLOGY CO., LTD. TO: MOSO POWER SUPPLY TECHNOLOGY CO., LTD. |
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Application publication date: 20110810 |