CN202857092U - Dimming circuit being compatible with silicon controlled rectifier light dimmer - Google Patents
Dimming circuit being compatible with silicon controlled rectifier light dimmer Download PDFInfo
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- CN202857092U CN202857092U CN2012205498876U CN201220549887U CN202857092U CN 202857092 U CN202857092 U CN 202857092U CN 2012205498876 U CN2012205498876 U CN 2012205498876U CN 201220549887 U CN201220549887 U CN 201220549887U CN 202857092 U CN202857092 U CN 202857092U
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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
Abstract
The utility model discloses a dimming circuit being compatible with a silicon controlled rectifier light dimmer, which comprises an input voltage source, a rectifying circuit, a silicon controlled rectifier light dimmer, a dimming circuit and an output circuit, wherein the input voltage source is connected with the rectifying circuit and the silicon controlled rectifier light dimmer, the rectifying circuit is connected with the dimming circuit, the dimming circuit is connected with the output circuit, and the output circuit comprises an isolation transformer, a switch tube, a third sampling resistor, a free-wheel diode, a filtering capacitor and an output LED load. The utility model is characterized in that the dimming circuit comprises a sampling circuit, a control & logic circuit and a phase cutting angle setting circuit, wherein the sampling circuit is used for sampling the size of a phase cutting angle of the silicon controlled rectifier light dimmer; the control & logic circuit is controlled by the size of the phase cutting angle; and the phase cutting angle setting circuit controls turn-off of the switch tube according to the state of an input phase cutting angle. Adoption of the circuit structure disclosed by the utility model can effectively solve a flicker problem emerged in the traditional dimming process, and achieves the purpose of dimming at the same time.
Description
Technical field
The utility model patent relates to a kind of light adjusting circuit of compatible silicon controlled dimmer, relates in particular to a kind of conventional incandescent controllable silicon dimmer that utilizes and goes the LED lamp is carried out light adjusting circuit and control method.
Background technology
Now because the develop rapidly of LED illumination, original tens watts incandescent lamp can substitute at the direct LED bulb lamp with several watts, so just can save a large amount of energy.The dimming mode of incandescent lamp much adopts controllable silicon dimmer to carry out phase-cut dimming.Conventional incandescent is owing to being a pure resistive load, so can directly carry out phase-cut dimming with controllable silicon dimmer to it.Because conventional incandescent mostly is tens to several hectowatts, the design of controllable silicon dimmer all designs as load.If but with this controllable silicon dimmer several watts LED lamp were carried out light modulation, because the LED lamp would not be pure group of load, so can bring the serious problems such as flicker.
Fig. 1 is a conventional incandescent controllable silicon light modulation schematic diagram.Wherein Lamp is that incandescent lamp, Q1 are that bidirectional triode thyristor, DB1 are that a two-way trigger tube, Rsw are that a variable resistance and the backward C1 of the being charging of connecting with R1 produce a variable time constant, thus the service time of control bidirectional triode thyristor.So just can test the light modulation to incandescent lamp.The each point waveform of cut when 90 spend as shown in Figure 2.
If but when the LED constant-current source directly received controllable silicon dimmer, its light modulation meeting went wrong.As: because the LED power supply is constant-current source, and controllable silicon dimmer can only carry out cut to input voltage, can equivalence the mean value of input voltage for a change, changing voltage can not exert an influence to constant-current source.So not can carry out light modulation to LED, so just need to become an adjustable current source that controlled by input voltage phase to the LED constant current.In addition, because there is larger leakage current in controllable silicon dimmer when turn-offing, it can affect the operating state of controllable silicon and LED power supply, thereby causes the phenomenon such as flicker.
The utility model content
For above-mentioned problems of the prior art, the purpose of this utility model is: light adjusting circuit and control method that a kind of compatible silicon controlled dimmer is provided, it is by sampling to input cut phase place, when sampling input voltage and be in the cut state, control circuit makes main loop of power circuit be in opening state to absorb the leakage current of controllable silicon dimmer fully, thereby guarantee the normal operation of controllable silicon dimmer and LED power supply, avoided simultaneously the phenomenons such as flicker, and realized the purpose of light modulation.
The technical scheme that its technical problem that solves the utility model adopts is:
A kind of light adjusting circuit of compatible silicon controlled dimmer, comprise: input voltage source, rectification circuit, controllable silicon dimmer, light adjusting circuit and output circuit, described input voltage source respectively with described rectification circuit be connected controllable silicon regulation and control device and be connected, described rectification circuit connects described light adjusting circuit, described light adjusting circuit is connected with described output circuit, described output circuit, comprise isolating transformer, switching tube, the 3rd sampling resistor, continue and flow diode, filter capacitor and output LED load, it is characterized in that described light adjusting circuit comprises:
The sample circuit that is used for sampling controllable silicon dimmer cut angular dimension;
Be subjected to the Kong Zhi ﹠amp of cut angular dimension control; Logical circuit, described Kong Zhi ﹠amp; Logical circuit comprises that three inputs are respectively CCS end, Ilim end and CS end, comprises that also an output is the OUT end;
And the cut angle that can go the control switch pipe to turn-off according to the state at input cut angle arranges circuit;
Described sample circuit is comprised of the first sampling resistor, the second sampling resistor, the first benchmark, the first comparator and inverter;
Described the first sampling resistor, the one end connects described rectification circuit, and the other end connects an input of the first comparator;
Described the second sampling resistor, one end connect the input of described the first sampling resistor and the first comparator, other end ground connection;
Described the first comparator, one input end connect described the first sampling resistor and the second sampling resistor, and another input connects the first benchmark;
Described the first benchmark, its other end ground connection;
Described inverter, its input connect output and the described Kong Zhi ﹠amp of described the first comparator; The CCS end of logical circuit, output connects described control ﹠amp; The Ilim end of logical circuit;
Described cut angle arranges circuit, comprise charge-discharge modules, integrating capacitor, the second benchmark, the second comparator or door and with door;
Described charge-discharge modules, the one end connects described integrating capacitor, and the other end connects output and an input described or door of described inverter;
Described integrating capacitor, the one end connects the negative input of charge-discharge modules and described the second comparator, its other end ground connection;
Described the second comparator, its electrode input end connect an end of described the second benchmark, and output connects the other end described or door;
The other end ground connection of described the second benchmark;
Described with the door, two input connects respectively described control ﹠amp; The OUT end of logical circuit and output described or door;
Described and door, the grid of its output connecting valve pipe is used for its shutoff of control.
One end of the former limit winding of described isolating transformer connects an end of described rectification circuit and the first sampling resistor, and the other end connects the drain electrode of described switching tube; The source electrode of described switching tube connects described control ﹠amp; The CS end of logical circuit and an end of the 3rd sampling resistor.
The other end ground connection of described the 3rd sampling resistor.
One end of the secondary winding of described isolating transformer connects the positive pole of the described stream diode that continues, and the other end connects respectively an end of described filter capacitor and the negative electrode of described output LED load;
The described negative pole that continues the stream diode connects respectively the other end of described filter capacitor and the positive pole of described output LED load.
The beneficial effects of the utility model are: adopt circuit structure described in the utility model can effectively solve the flicker problem that occurs in traditional light modulation process, also reached the purpose of light modulation simultaneously.
Description of drawings
Fig. 1 is a kind of conventional incandescent controllable silicon dimmer fundamental diagram;
Fig. 2 is the waveform correlation figure of Fig. 1 circuit when work;
Fig. 3 is a kind of implementation circuit diagram of light adjusting circuit of compatible silicon controlled dimmer;
Fig. 4 is Fig. 3 circuit each key point oscillogram when work.
Wherein, among Fig. 3: the A-sample circuit, B-controls ﹠amp; Logical circuit, C-cut angle arranges circuit.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further.
Fig. 1 is a conventional incandescent controllable silicon light modulation schematic diagram.Wherein Lamp is that incandescent lamp, Q1 are that bidirectional triode thyristor, DB1 are that a two-way trigger tube, Rsw are that a variable resistance and the backward C1 of the being charging of connecting with R1 produce a variable time constant, thus the service time of control bidirectional triode thyristor.So just can test the light modulation to incandescent lamp.The each point waveform of cut when 90 spend as shown in Figure 2.
If but when the LED constant-current source directly received controllable silicon dimmer, its light modulation meeting went wrong.As: because the LED power supply is constant-current source, and controllable silicon dimmer can only carry out cut to input voltage, can equivalence the mean value of input voltage for a change, changing voltage can not exert an influence to constant-current source.So not can carry out light modulation to LED, so just need to become an adjustable current source that controlled by input voltage phase to the LED constant current.In addition, because there is larger leakage current in controllable silicon dimmer when turn-offing, it can affect the operating state of controllable silicon and LED power supply, thereby causes the phenomenon such as flicker.
For eliminating the problems referred to above, set forth embodiment of the present utility model in conjunction with Fig. 3 implementation circuit.
As shown in Figure 3, a kind of light adjusting circuit of compatible silicon controlled dimmer, its circuit structure is specific as follows:
The two ends of input voltage source 900 are connected respectively to an end of controllable silicon dimmer 901, input with rectification circuit 902, the other end of controllable silicon dimmer 901 connects another input of rectification circuit 902, one end of one end of the positive output end connection sampling resistor 903 of rectification circuit 902 and the former limit winding of isolating transformer 917, the drain electrode of the former limit winding other end connecting valve pipe 915 of isolating transformer 917, one end of the secondary winding of isolating transformer 917 connects the positive pole of exporting the stream diode 918 that continues, the negative pole that flows diode 918 that continues connects the positive pole of output filter capacitor 919 and the positive pole of output LED load 920, and the other end of the secondary winding of isolating transformer 917 connects the negative pole of output filter capacitor 919 and the negative pole of output LED load 920.The other end of the first sampling resistor 903 connects an end of the second sampling resistor 904 and the positive input terminal of the first comparator 906, the negative input end of the first comparator 906 connects the positive pole of benchmark 905, and the output of the first comparator 906 connects the Kong Zhi ﹠amp of reverser 907; The CCS end of logical circuit 908, the output of reverser 907 connects control ﹠amp; The control end of the Llim of logical circuit 908 end and charge/discharge module 909 and or an input of 913, the output of charge/discharge module 909 connects the negative input end of integrating capacitor 910 and the second comparator 912, the positive input terminal of the second comparator 912 connects the anode of the second benchmark 911, the output connection of the second comparator 912 or an input of door 913, or the output of door 913 connects and an input of door 914, control ﹠amp; The source electrode of the CS pin connecting valve pipe 915 of logical circuit 908 and an end of the 3rd sampling resistor 916, control ﹠amp; The OUT of logical circuit 908 connects the input with door 914, with the grid of the output connecting valve pipe 915 of door 914.
The utility model utilizes controllable silicon dimmer cut angle sample circuit to detect the cut angle of input, when sampling input voltage and be in the cut state, be state before the cut with the constant current value of keeping system, simultaneously, the inner benchmark of CS end is heightened, to open switching tube 915 always, thereby absorb the leakage current of control silicon dimmer fully, guarantee flicker free problem when light modulation, simultaneously, because noenergy offers output when input voltage is in the cut state, therefore the average current of output is just incited somebody to action lower.Thereby realize the purpose of light modulation.When input is in the cut state (controllable silicon dimmer is in off state), to enable charge/discharge module 909, give integrating capacitor 910 chargings, when the voltage on the integrating capacitor 910 during greater than the second benchmark 911, will be when controllable silicon dimmer be opened, on-off switching tube 915, thus noenergy can be exported, avoid the problem of flicker occurring in a certain critical point because input voltage is lower.
Described in this specification is preferred specific embodiment of the present utility model, and above embodiment is only in order to the technical solution of the utility model to be described but not to restriction of the present utility model.All those skilled in the art comply with design of the present utility model by the available technical scheme of logical analysis, reasoning, or a limited experiment, all should be within the scope of the present utility model that defines such as claim.
Claims (4)
1. the light adjusting circuit of a compatible silicon controlled dimmer, comprise: input voltage source, rectification circuit, controllable silicon dimmer, light adjusting circuit and output circuit, described input voltage source respectively with described rectification circuit be connected controllable silicon regulation and control device and be connected, described rectification circuit connects described light adjusting circuit, described light adjusting circuit is connected with described output circuit, described output circuit, comprise isolating transformer, switching tube, the 3rd sampling resistor, continue and flow diode, filter capacitor and output LED load, it is characterized in that described light adjusting circuit comprises:
The sample circuit that is used for sampling controllable silicon dimmer cut angular dimension;
Be subjected to the Kong Zhi ﹠amp of cut angular dimension control; Logical circuit, described Kong Zhi ﹠amp; Logical circuit comprises that three inputs are respectively CCS end, Ilim end and CS end, comprises that also an output is the OUT end;
And the cut angle that can go the control switch pipe to turn-off according to the state at input cut angle arranges circuit.
2. the light adjusting circuit of a kind of compatible silicon controlled dimmer as claimed in claim 1 is characterized in that, described sample circuit is comprised of the first sampling resistor, the second sampling resistor, the first benchmark, the first comparator and inverter;
Described the first sampling resistor, the one end connects described rectification circuit, and the other end connects an input of the first comparator;
Described the second sampling resistor, one end connect the input of described the first sampling resistor and the first comparator, other end ground connection;
Described the first comparator, one input end connect described the first sampling resistor and the second sampling resistor, and another input connects the first benchmark;
Described the first benchmark, its other end ground connection;
Described inverter, its input connect output and the described Kong Zhi ﹠amp of described the first comparator; The CCS end of logical circuit, output connects described control ﹠amp; The Ilim end of logical circuit.
3. the light adjusting circuit of a kind of compatible silicon controlled dimmer as claimed in claim 2 is characterized in that, described cut angle arranges circuit, comprise charge-discharge modules, integrating capacitor, the second benchmark, the second comparator or door and with door;
Described charge-discharge modules, the one end connects described integrating capacitor, and the other end connects output and an input described or door of described inverter;
Described integrating capacitor, the one end connects the negative input of charge-discharge modules and described the second comparator, its other end ground connection;
Described the second comparator, its electrode input end connect an end of described the second benchmark, and output connects the other end described or door;
The other end ground connection of described the second benchmark;
Described with the door, two input connects respectively described control ﹠amp; The OUT end of logical circuit and output described or door;
Described and door, the grid of its output connecting valve pipe is used for its shutoff of control.
4. the light adjusting circuit of a kind of compatible silicon controlled dimmer as claimed in claim 3, it is characterized in that, one end of the former limit winding of described isolating transformer connects respectively an end of described rectification circuit and the first sampling resistor, and the other end connects the drain electrode of described switching tube;
The source electrode of described switching tube connects respectively described control ﹠amp; The CS end of logical circuit and an end of the 3rd sampling resistor;
The other end ground connection of described the 3rd sampling resistor;
One end of the secondary winding of described isolating transformer connects the positive pole of the described stream diode that continues, and the other end connects respectively an end of described filter capacitor and the negative electrode of described output LED load;
The described negative pole that continues the stream diode connects respectively the other end of described filter capacitor and the positive pole of described output LED load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205498876U CN202857092U (en) | 2012-10-25 | 2012-10-25 | Dimming circuit being compatible with silicon controlled rectifier light dimmer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205498876U CN202857092U (en) | 2012-10-25 | 2012-10-25 | Dimming circuit being compatible with silicon controlled rectifier light dimmer |
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| CN202857092U true CN202857092U (en) | 2013-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012205498876U Expired - Fee Related CN202857092U (en) | 2012-10-25 | 2012-10-25 | Dimming circuit being compatible with silicon controlled rectifier light dimmer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103781229A (en) * | 2012-10-25 | 2014-05-07 | 上海占空比电子科技有限公司 | Dimming circuit compatible with silicon controlled rectifier dimmer and control method |
| WO2015042787A1 (en) * | 2013-09-25 | 2015-04-02 | 朱文运 | Constant current drive circuit and method for using same |
| CN110856304A (en) * | 2014-11-04 | 2020-02-28 | 昕诺飞控股有限公司 | LED lighting system |
-
2012
- 2012-10-25 CN CN2012205498876U patent/CN202857092U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103781229A (en) * | 2012-10-25 | 2014-05-07 | 上海占空比电子科技有限公司 | Dimming circuit compatible with silicon controlled rectifier dimmer and control method |
| CN103781229B (en) * | 2012-10-25 | 2015-09-23 | 上海占空比电子科技有限公司 | A kind of light adjusting circuit of compatible silicon controlled dimmer and control method |
| WO2015042787A1 (en) * | 2013-09-25 | 2015-04-02 | 朱文运 | Constant current drive circuit and method for using same |
| CN110856304A (en) * | 2014-11-04 | 2020-02-28 | 昕诺飞控股有限公司 | LED lighting system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130403 Termination date: 20191025 |
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| CF01 | Termination of patent right due to non-payment of annual fee |