CN104955246A - Circuit structure used for LED illuminating lamp and driven by alternating current and constant current power supplies - Google Patents
Circuit structure used for LED illuminating lamp and driven by alternating current and constant current power supplies Download PDFInfo
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- CN104955246A CN104955246A CN201510413780.7A CN201510413780A CN104955246A CN 104955246 A CN104955246 A CN 104955246A CN 201510413780 A CN201510413780 A CN 201510413780A CN 104955246 A CN104955246 A CN 104955246A
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Abstract
The invention discloses a circuit structure used for an LED illuminating lamp and driven by alternating current and constant current power supplies. The circuit structure comprises an alternating current power supply, wherein a constant-current light source string (A) is connected in series between two electrodes of the alternating current power supply; the constant-current light source string (A) is formed by connecting constant current diodes (D) and LED light source units (B) in series; each LED light source unit (B) is formed by connecting two groups of LED light sources with opposite polarity in parallel. The circuit structure can be directly driven by the alternating current power supply, fewer electronic elements are required, the circuit structure is simple, the production cost is greatly reduced, and the market competitiveness of products can be effectively improved. With the adoption of the circuit structure, the output power factor can reach 95%, and the power conversion efficiency can reach 90%; only half of LED light sources are lightened in a half period of the alternating current power supply, the heat of the LED light sources is reduced by half, and the requirements are met only through conduction and heat dissipation of a casing.
Description
Technical field
The application relates to a kind of drive circuit of LED illumination lamp, and particularly a kind of LED illumination lamp exchanges the circuit structure that constant-current supply drives.
Background technology
Because semiconductor lighting has energy saving, environmental protection, long service life, start the upsurge that a LED illumination lamp is researched and produced in the whole world.In high-power LED illuminating lamp uses, the power factor (PF) of driving power, conversion efficiency are the key factors affecting LED illumination lamp use, and the change of the output current of power supply can directly have influence on LED illumination lamp output light flux and useful life.If constant-current control circuit design is unreasonable, LED illumination lamp output light flux is difficult to reach requirement, does not have the effect of energy efficiency, thus suppresses the popularization of LED illumination lamp.
The power drives of the high-power LED illuminating lamp of present use, is normally transformed into DC power supply by AC power, then carries out the control of constant pressure and flow, finally by filtering driving LED light source again.This circuit structure is made up of a lot of electronic component, and structure is comparatively complicated, cost is higher; Its driving power adopts high frequency switch power usually, and power output factor is lower; And become in the process of direct current to need a lot of energy of loss at exchange conversion, the conversion efficiency of electric energy is poor; In addition, use the LED light source of DC driven to be in luminance, the heat of generation is large always, and heat dissipation problem is difficult to solve.Therefore, existing LED illumination lamp power drives mode or not ideal enough.
Summary of the invention
The technical problem that the application will solve is: provide a kind of LED illumination lamp to exchange the circuit structure of constant-current supply driving, with the technical problem solving existing LED illumination lamp power supply drive method and circuit structure cost is higher, power output factor is lower, conversion efficiency that is electric energy is poor, heat radiation is difficult, thus overcome the deficiencies in the prior art.
The circuit structure that the LED illumination lamp interchange constant-current supply of the application drives forms like this: this circuit structure comprises AC power, is serially connected with constant current string of light A between the two poles of the earth of AC power; Wherein constant current string of light A be by current regulator diode D and LED light source unit B in series, LED light source unit B is formed in parallel by two groups of LED light sources that polar orientation is contrary.
Above-mentioned LED illumination lamp exchanges in the circuit structure of constant-current supply driving, is serially connected with the constant current string of light A that many groups are in parallel between the two poles of the earth of AC power.
In the LED light source of two groups of parallel connections, often organize in LED light source and be at least in series with 2 LED light sources.
Owing to have employed technique scheme, compared with the prior art, the application can directly use AC power to drive, and the electronic component needed is less, circuit structure simple, greatly reduces production cost, effectively can improve the competitiveness of product in market; The method of present use high frequency switch power and circuit structure, power factor (PF) is generally 75%, and uses the power output factor of the application can reach 95%; The energy conversion efficiency of existing LED switch power supply is generally 75% to 80%, and the application can reach 90%; Use method and the circuit structure of the application, in the half period of AC power, only have the LED light source of half to be lit, make the caloric value of LED light source reduce half, only rely on the heat loss through conduction of shell just can meet the demands.
Accompanying drawing illustrates:
Fig. 1 is the circuit structure diagram of the application.
Embodiment:
The embodiment of the application: the application is formed in accordance with the following methods: first, forming with two groups of LED light source parallel connections that polar orientation is contrary can with exchanging the LED light source unit driven, make LED light source unit in the positive and negative half period of AC power, have one group of LED light source to be lit respectively, namely reach the object directly using and exchange and drive; Again by LED light source unit and current regulator diode constant current string of light in series, finally, by be serially connected in AC power after the parallel connection of multiple constant current string of light the two poles of the earth between (quantity of constant current string of light can be determined according to actual production demand).
The LED illumination lamp of the application built according to the method described above exchanges the circuit structure of constant-current supply driving as shown in Figure 1: this circuit structure comprises existing AC power, constant current string of light A in serial connection between the two poles of the earth of AC power.Wherein constant current string of light A be with existing commercially available current regulator diode D and LED light source unit B in series, LED light source unit B is formed in parallel (as shown in Figure 1 by two groups of existing commercially available LED light sources that polar orientation is contrary, D11, D 12 ~ D 1n series connection is one group, D 21, D 22 ~ D 2n are another group, LED light source unit B is composed in parallel by these two groups, and these two groups of polar orientation are relatively reverse, the series connection number of the LED light source of each group can be determined according to actual production demand, but is often organizing in LED light source 2 LED light sources of at least should connecting).In order to ensure the luminous flux of LED illumination lamp, many groups constant current string of light A in parallel can be connected in series (as shown in Figure 1 between the two poles of the earth of AC power, first by after constant current string of light A parallel connection, between the two poles of the earth being concatenated into AC power again, the quantity of constant current string of light A can be determined according to actual production demand).
When the application's work, current regulator diode D makes when outside power source change, by the current constant of one group of LED light source in LED light source unit B, and LED illumination lamp output light flux and useful life.One group of LED light source that D11, D 12 ~ D 1n is composed in series within the half period of alternating current circuit power supply is luminous, and one group of LED light source that lower half period D 21, D 22 ~ D 2n are composed in series is luminous, and within the cycle of haveing suffered, these two groups of LED light sources are alternately luminous.Owing to only having the LED light source of a group to be lit in half period, so the heat produced also reduces half accordingly, the key technology that high-power LED illuminating lamp is dispelled the heat is resolved.In addition, the standard frequency of China's AC-powered is defined as 50Hz, and half period is 10ms, two groups of LED light sources checker in 10ms, and human eye visual angle does not have obvious sensation, thus reaches the effect the same with the LED light source that existing employing DC power supply drives.
Claims (3)
1. LED illumination lamp exchanges the circuit structure that constant-current supply drives, and comprises AC power, it is characterized in that: between the two poles of the earth of AC power, be serially connected with constant current string of light (A); Wherein constant current string of light (A) is in series by current regulator diode (D) and LED light source unit (B), and LED light source unit (B) is formed in parallel by two groups of LED light sources that polar orientation is contrary.
2. LED illumination lamp according to claim 1 exchanges the circuit structure that constant-current supply drives, and it is characterized in that: between the two poles of the earth of AC power, be serially connected with the constant current string of light (A) that many groups are in parallel.
3. LED illumination lamp according to claim 1 exchanges the circuit structure that constant-current supply drives, and it is characterized in that: in the LED light source of two groups of parallel connections, often organizes in LED light source and is at least in series with 2 LED light sources.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510413780.7A CN104955246A (en) | 2015-07-09 | 2015-07-09 | Circuit structure used for LED illuminating lamp and driven by alternating current and constant current power supplies |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510413780.7A CN104955246A (en) | 2015-07-09 | 2015-07-09 | Circuit structure used for LED illuminating lamp and driven by alternating current and constant current power supplies |
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| Publication Number | Publication Date |
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| CN104955246A true CN104955246A (en) | 2015-09-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510413780.7A Pending CN104955246A (en) | 2015-07-09 | 2015-07-09 | Circuit structure used for LED illuminating lamp and driven by alternating current and constant current power supplies |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110199574A (en) * | 2017-01-25 | 2019-09-03 | 伊顿智能动力有限公司 | The power regulation of lighting device |
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2015
- 2015-07-09 CN CN201510413780.7A patent/CN104955246A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110199574A (en) * | 2017-01-25 | 2019-09-03 | 伊顿智能动力有限公司 | The power regulation of lighting device |
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Addressee: NANJING XINGBA SCIENCE & TECHNOLOGY CO., LTD. Document name: Notification of before Expiration of Request of Examination as to Substance |
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Addressee: NANJING XINGBA SCIENCE & TECHNOLOGY CO., LTD. Document name: Notification that Application Deemed to be Withdrawn |
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Application publication date: 20150930 |
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| WD01 | Invention patent application deemed withdrawn after publication |