CN204442749U - For exchanging the current compensation circuit of phase-cut dimming LED power - Google Patents
For exchanging the current compensation circuit of phase-cut dimming LED power Download PDFInfo
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- CN204442749U CN204442749U CN201420865572.1U CN201420865572U CN204442749U CN 204442749 U CN204442749 U CN 204442749U CN 201420865572 U CN201420865572 U CN 201420865572U CN 204442749 U CN204442749 U CN 204442749U
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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
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The utility model is for exchanging the current compensation circuit of phase-cut dimming LED power, comprise dimming power source module, dimming power source module comprises the electromagnetic interface filter connected successively, bridge rectifier, filter, power converter and dimming controlling module, also comprise the first resistance, first electric capacity and the second electric capacity, the positive pole of bridge rectifier is connected to the first resistance simultaneously, first resistance connects again the first electric capacity then ground connection, positive pole and the negative pole of the second electric capacity and out-put supply end connect, current compensation circuit for exchanging phase-cut dimming LED power also comprises light modulation low current compensating module, light modulation low current compensating module comprises transistor, first diode, second diode, 3rd diode, second resistance, 3rd resistance and the 4th resistance.The utility model achieves can provide electric current to maintain controlled silicon conducting when controlled silicon conducting angle is less, thus realizes good dimming effect and the light modulation degree of depth.
Description
Technical field
The utility model relates to electronic circuit field, particularly relates to the current compensation circuit for exchanging phase-cut dimming LED power.
Background technology
Exchange cut to realize by controlling silicon controlled angle of flow, traditional LED dimming drive power controls output current by detecting angle of flow thus realize dimming function, but the electric current of driving power has been not enough to maintain controlled silicon conducting when controlled silicon conducting angle is less, therefore causes lamp to dodge and had a strong impact on eyesight.
Utility model content
The purpose of this utility model is the defect overcoming prior art, be provided for the current compensation circuit exchanging phase-cut dimming LED power, achieve and electric current can be provided to maintain controlled silicon conducting when controlled silicon conducting angle is less, thus realize good dimming effect and the light modulation degree of depth.
The technical scheme realizing above-mentioned purpose is:
A kind of current compensation circuit for exchanging phase-cut dimming LED power of the utility model, wherein, the described current compensation circuit for exchanging phase-cut dimming LED power comprises dimming power source module, described dimming power source module comprises the electromagnetic interface filter connected successively, bridge rectifier, filter, power converter and dimming controlling module, also comprise the first resistance, first electric capacity and the second electric capacity, the positive pole of described bridge rectifier is connected to the first resistance simultaneously, described first resistance connects again the first electric capacity then ground connection, positive pole and the negative pole of described second electric capacity and out-put supply end connect, it is characterized in that: the described current compensation circuit for exchanging phase-cut dimming LED power also comprises light modulation low current compensating module, described light modulation low current compensating module comprises transistor, first diode, second diode, 3rd diode, second resistance, 3rd resistance and the 4th resistance, wherein:
The positive pole of described bridge rectifier is connected to the collector electrode of transistor by the second resistance; The emitter of described transistor is connected to the negative pole of bridge rectifier on the one hand by the 3rd resistance, connect the positive pole of the first diode on the other hand; The base stage of described transistor is connected to the main circuit VCC of access on the one hand by the 4th resistance, connect the positive pole of the second diode on the other hand; The negative pole of described first diode and the negative pole of the second diode are connected to the positive pole of the 3rd diode simultaneously, and the negative pole of described 3rd diode connects the negative pole of bridge rectifier.
The above-mentioned current compensation circuit for exchanging phase-cut dimming LED power, wherein, described dimming controlling module comprises power factor correction module and pulse-width modulation constant-current control module.
The beneficial effects of the utility model are: the utility model is provided for the current compensation circuit exchanging phase-cut dimming LED power, solve controlled silicon conducting angle less time can provide electric current maintain controlled silicon conducting, thus realize good dimming effect and the light modulation degree of depth, applicability is strong, with low cost, debugging is simple, and improve dimming effect obvious, device can be built in the application scenario such as bulb lamp, shot-light of limited space less.
Accompanying drawing explanation
Fig. 1 is the structural representation of the current compensation circuit for exchanging phase-cut dimming LED power.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Refer to Fig. 1, a kind of current compensation circuit for exchanging phase-cut dimming LED power of the utility model, comprise dimming power source module 1, described dimming power source module comprises the electromagnetic interface filter 3 (Electromagnetic interference filter) connected successively, bridge rectifier 4, filter 5, power converter 6 and dimming controlling module 7, also comprise the first resistance R1, first electric capacity C1 and the second electric capacity C2, the positive pole of described bridge rectifier 4 is connected to the first resistance R1 simultaneously, described first resistance R1 connects again the first electric capacity C1 then ground connection, positive pole Vo+ and the negative pole Vo-of described second electric capacity C2 and out-put supply end connect.Electromagnetic interface filter 3 be for input electric network source exchange filtering, filter 5 be for bridge rectifier 4 rectification after direct current carry out filtering.
Current compensation circuit for exchanging phase-cut dimming LED power also comprises light modulation low current compensating module 2, and described light modulation low current compensating module 2 comprises transistor Q1, the first diode D1, the second diode D2, the 3rd diode D3, the second resistance R2, the 3rd resistance R3 and the 4th resistance R4.
The positive pole of described bridge rectifier 4 is connected to the collector electrode of transistor Q1 by the second resistance R2; The emitter of described transistor Q1 is connected to the negative pole of bridge rectifier 4 on the one hand by the 3rd resistance R3, connect the positive pole of the first diode D1 on the other hand; The base stage of described transistor Q1 is connected to the main circuit VCC of access on the one hand by the 4th resistance R4, connect the positive pole of the second diode D2 on the other hand; The negative pole of described first diode D1 and the negative pole of the second diode D2 are connected to the positive pole of the 3rd diode D3 simultaneously, and the negative pole of described 3rd diode D3 connects the negative pole of bridge rectifier 4.
Described dimming controlling module 7 comprises power factor correction module and pulse-width modulation constant-current control module (PWM constant-current control module).
The utility model is applicable to the circuit exchanging (AC) phase-cut dimming LED drive power, when AC cut, driving power is needed to provide enough electric current to maintain controlled silicon conducting, can provide when driving power power is larger and maintain electric current by controlled silicon conducting, but driving power power drop when controlled silicon conducting angle is less in dimming process, undercurrent is to maintain controlled silicon conducting, the whole lamp flicker of LED will be caused, now just can increase this circuit to provide maintenance electric current and normally work by controllable silicon.As accompanying drawing 1, after power declines, electric current on 3rd resistance R3 is also along with declining, with bridge rectifier 4 negative pole for zero potential, Ve (i.e. the 3rd resistance R3 voltage) reduces, and------>Vbe rising--->Ib rising--->Ic's >Vb constant (the first diode D1, the second diode D2 clamper) rises, and still has electric current to maintain controlled silicon conducting like this when controlled silicon conducting angle is less; The maximum current of the second resistance R2 limit transistor Q1 that is to say maintenance electric current.Otherwise when light modulation is larger to angle of flow, power rises thereupon, now the electric current of power supply itself also can allow controlled silicon conducting, electric current on 3rd resistance R3 rises, and--->Ve (i.e. the 3rd resistance R3 voltage) rises, and--->Vbe decline--->Ib decline--->Ic declines, so just can improve the efficiency of whole system, controllable silicon angle of flow larger and less in can normally work.
The utility model successfully solves can also provide electric current to maintain controlled silicon conducting when angle of flow is less, thus realize good dimming effect and the light modulation degree of depth, applicability is strong, can be used for the topological structures such as BUCK, BUCK/BOOST, FLYBACK, with low cost, debugging is simple and it is obvious to improve dimming effect, device can be built in the application scenario such as bulb lamp, shot-light of limited space less.
Below embodiment has been described in detail the utility model by reference to the accompanying drawings, and those skilled in the art can make many variations example to the utility model according to the above description.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.Thus, some details in embodiment should not formed restriction of the present utility model, the utility model by the scope that defines using appended claims as protection range of the present utility model.
Claims (2)
1. one kind for exchanging the current compensation circuit of phase-cut dimming LED power, it is characterized in that: the described current compensation circuit for exchanging phase-cut dimming LED power comprises dimming power source module, described dimming power source module comprises the electromagnetic interface filter connected successively, bridge rectifier, filter, power converter and dimming controlling module, also comprise the first resistance, first electric capacity and the second electric capacity, the positive pole of described bridge rectifier is connected to the first resistance simultaneously, described first resistance connects again the first electric capacity then ground connection, positive pole and the negative pole of described second electric capacity and out-put supply end connect, it is characterized in that: the described current compensation circuit for exchanging phase-cut dimming LED power also comprises light modulation low current compensating module, described light modulation low current compensating module comprises transistor, first diode, second diode, 3rd diode, second resistance, 3rd resistance and the 4th resistance, wherein:
The positive pole of described bridge rectifier is connected to the collector electrode of transistor by the second resistance; The emitter of described transistor is connected to the negative pole of bridge rectifier on the one hand by the 3rd resistance, connect the positive pole of the first diode on the other hand; The base stage of described transistor is connected to the main circuit VCC of access on the one hand by the 4th resistance, connect the positive pole of the second diode on the other hand; The negative pole of described first diode and the negative pole of the second diode are connected to the positive pole of the 3rd diode simultaneously, and the negative pole of described 3rd diode connects the negative pole of bridge rectifier.
2. the current compensation circuit for exchanging phase-cut dimming LED power according to claim 1, is characterized in that: described dimming controlling module comprises power factor correction module and pulse-width modulation constant-current control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420865572.1U CN204442749U (en) | 2014-12-31 | 2014-12-31 | For exchanging the current compensation circuit of phase-cut dimming LED power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420865572.1U CN204442749U (en) | 2014-12-31 | 2014-12-31 | For exchanging the current compensation circuit of phase-cut dimming LED power |
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| Publication Number | Publication Date |
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| CN204442749U true CN204442749U (en) | 2015-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420865572.1U Active CN204442749U (en) | 2014-12-31 | 2014-12-31 | For exchanging the current compensation circuit of phase-cut dimming LED power |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109819551A (en) * | 2019-02-22 | 2019-05-28 | 无锡安特源科技股份有限公司 | A kind of constant current light modulating device for LED light |
| CN113179565A (en) * | 2021-05-06 | 2021-07-27 | 上海奥简微电子科技有限公司 | LED silicon controlled rectifier depth compensation circuit and LED lighting device of adjusting luminance |
-
2014
- 2014-12-31 CN CN201420865572.1U patent/CN204442749U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109819551A (en) * | 2019-02-22 | 2019-05-28 | 无锡安特源科技股份有限公司 | A kind of constant current light modulating device for LED light |
| CN113179565A (en) * | 2021-05-06 | 2021-07-27 | 上海奥简微电子科技有限公司 | LED silicon controlled rectifier depth compensation circuit and LED lighting device of adjusting luminance |
| CN113179565B (en) * | 2021-05-06 | 2024-01-12 | 上海奥简微电子科技有限公司 | LED silicon controlled rectifier dimming depth compensation circuit and LED lighting device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 214000 Jiangsu Province, Wuxi City Linghu Wuxi national hi tech Industrial Development Zone, Road No. 200 China sensor network D2-101, D2-201 International Innovation Park Housing Patentee after: ADPOWER TECHNOLOGY (WUXI) CO., LTD. Address before: 214000 Jiangsu Province, Wuxi City Linghu Wuxi national hi tech Industrial Development Zone, Road No. 200 China sensor network D2-101, D2-201 International Innovation Park Housing Patentee before: Wuxi ADPOWER Technology Co.,Ltd. |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Current compensating line for AC phase cut dimming LED power supply Effective date of registration: 20160707 Granted publication date: 20150701 Pledgee: Agricultural Bank of China Limited by Share Ltd Wuxi science and Technology Branch Pledgor: ADPOWER TECHNOLOGY (WUXI) CO., LTD. Registration number: 2016990000533 |
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| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20210201 Granted publication date: 20150701 Pledgee: Agricultural Bank of China Limited by Share Ltd. Wuxi science and Technology Branch Pledgor: ADPOWER TECHNOLOGY(WUXI) Co.,Ltd. Registration number: 2016990000533 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Current compensation circuit for AC phase switching dimming LED power supply Effective date of registration: 20210205 Granted publication date: 20150701 Pledgee: Agricultural Bank of China Limited by Share Ltd. Wuxi science and Technology Branch Pledgor: ADPOWER TECHNOLOGY(WUXI) Co.,Ltd. Registration number: Y2021320010050 |