CN201491361U - Direct current light modulator - Google Patents
Direct current light modulator Download PDFInfo
- Publication number
- CN201491361U CN201491361U CN2009201601255U CN200920160125U CN201491361U CN 201491361 U CN201491361 U CN 201491361U CN 2009201601255 U CN2009201601255 U CN 2009201601255U CN 200920160125 U CN200920160125 U CN 200920160125U CN 201491361 U CN201491361 U CN 201491361U
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- direct current
- sampling feedback
- transformer
- transistor
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Abstract
A direct current light modulator relates to a light modulator, and consists of a rectification filter circuit (1), a transistor (2), a transformer (3), a diode (4), a capacitor (5), an adjustable resistance (6), a sampling feedback circuit (7), an optical coupler (8) and a PWM ( Pulse-width Modulation ) control circuit (9). The direct current light modulator can output continuous variable direct current, has little possibility to cause abnormalities such as flickering and the like, has a simple circuit structure, and can easily achieve light modulation for an energy-saving lamp.
Description
Technical field:
The utility model relates to a kind of dimmer, especially a kind of direct current dimmer.
Background technology:
Be accompanied by the appearance of various countries' efficiency standard, the energy-conservation focus that has become everybody concern, at illuminating industry, the demand of " light modulation " function of arising at the historic moment has proposed requirement to various lightings.And carried again as the light modulation of main force's light source electricity-saving lamp of illuminating industry.Traditional light-modulating mode is the copped wave phase-cut dimming, and this light-modulating mode is relatively to be fit to tungsten lamp, and anomalies such as flicker appear in regular meeting when still regulating electricity-saving lamp, and relatively more suitable mode of frequency regulation is not suitable for again electricity-saving lamp.
The utility model content:
The purpose of this utility model provides a kind of direct current dimmer, it can export continuous variable DC voltage, when the input of electricity-saving lamp with after the output of dimmer is connected, can realize light modulation easily to electricity-saving lamp, circuit structure is simple, and is difficult for causing flicker etc. unusual.
In order to solve the existing problem of background technology, the utility model is by the following technical solutions: it is by current rectifying and wave filtering circuit 1, transistor 2, transformer 3, diode 4, electric capacity 5, adjustable resistance 6, sampling feedback circuit 7, optocoupler 8 and pwm control circuit 9 are formed, one end of current rectifying and wave filtering circuit 1 is connected to the elementary of transformer 3, the elementary other end of transformer 3 is connected with the drain electrode of transistor 2, the source electrode of transistor 2 is connected with the other end of substrate with current rectifying and wave filtering circuit 1, the grid of transistor 2 is connected with pwm control circuit 9, pwm control circuit 9 is connected with optocoupler 8, optocoupler 8 is connected with sampling feedback circuit 7, adjustable resistance 6 is in parallel with sampling feedback circuit 7, sampling feedback circuit 7 is connected with an end of electric capacity 5, secondary and the diode 4 of transformer 3 is connected, and the other end of sampling feedback circuit 7 and electric capacity 5 is connected to the other end of diode 4.
When the utility model uses, by adjusting, change the size of the feedback signal of sampling feedback circuit 7 samplings, the output characteristic of control optocoupler 8 to adjustable resistance 6, thereby reach the size of the duty ratio D of control pwm control circuit 9, finally realize the variation of output voltage from 64-264VDC.
The utility model can be exported continuous variable direct current, is difficult for causing flicker etc. unusual, and circuit structure is simple, can realize the light modulation to electricity-saving lamp easily.
Description of drawings:
Fig. 1 is a structural representation of the present utility model.
Embodiment:
With reference to Fig. 1, this embodiment is by the following technical solutions: it is by current rectifying and wave filtering circuit 1, transistor 2, transformer 3, diode 4, electric capacity 5, adjustable resistance 6, sampling feedback circuit 7, optocoupler 8 and pwm control circuit 9 are formed, one end of current rectifying and wave filtering circuit 1 is connected to the elementary of transformer 3, the elementary other end of transformer 3 is connected with the drain electrode of transistor 2, the source electrode of transistor 2 is connected with the other end of substrate with current rectifying and wave filtering circuit 1, the grid of transistor 2 is connected with pwm control circuit 9, pwm control circuit 9 is connected with optocoupler 8, optocoupler 8 is connected with sampling feedback circuit 7, adjustable resistance 6 is in parallel with sampling feedback circuit 7, sampling feedback circuit 7 is connected with an end of electric capacity 5, secondary and the diode 4 of transformer 3 is connected, and the other end of sampling feedback circuit 7 and electric capacity 5 is connected to the other end of diode 4.
When this embodiment is used, by adjusting to adjustable resistance 6, change the size of the feedback signal of sampling feedback circuit 7 samplings, the output characteristic of control optocoupler 8, thereby reach the size of the duty ratio D of control pwm control circuit 9, finally realize the variation of output voltage from 64-264VDC or wideer voltage.
This embodiment can be exported continuous variable direct current, is difficult for causing flicker etc. unusual when regulating electricity-saving lamp, and circuit structure is simple, can realize the light modulation to electricity-saving lamp easily.The special case that last example just uses the BUCK topology theory to implement certainly, also can be used the BUCK-BOOST topology theory and implement, and all is the protection ranges that belong to this patent.
Claims (1)
1. direct current dimmer, it is characterized in that it is by current rectifying and wave filtering circuit (1), transistor (2), transformer (3), diode (4), electric capacity (5), adjustable resistance (6), sampling feedback circuit (7), optocoupler (8) and pwm control circuit (9) are formed, one end of current rectifying and wave filtering circuit (1) is connected to the elementary of transformer (3), the elementary other end of transformer (3) is connected with the drain electrode of transistor (2), the source electrode of transistor (2) is connected with the other end of substrate with current rectifying and wave filtering circuit (1), the grid of transistor (2) is connected with pwm control circuit (9), pwm control circuit (9) is connected with optocoupler (8), optocoupler (8) is connected with sampling feedback circuit (7), adjustable resistance (6) is in parallel with sampling feedback circuit (7), sampling feedback circuit (7) is connected with an end of electric capacity (5), secondary and the diode (4) of transformer (3) is connected, and the other end of sampling feedback circuit (7) and electric capacity (5) is connected to the other end of diode (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201601255U CN201491361U (en) | 2009-06-18 | 2009-06-18 | Direct current light modulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201601255U CN201491361U (en) | 2009-06-18 | 2009-06-18 | Direct current light modulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201491361U true CN201491361U (en) | 2010-05-26 |
Family
ID=42430223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201601255U Expired - Fee Related CN201491361U (en) | 2009-06-18 | 2009-06-18 | Direct current light modulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201491361U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108366455A (en) * | 2018-03-01 | 2018-08-03 | 深圳赫飞物联科技有限公司 | It is a kind of that light-dimming method is simulated by the high P of primary side of pwm signal regulation and control |
-
2009
- 2009-06-18 CN CN2009201601255U patent/CN201491361U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108366455A (en) * | 2018-03-01 | 2018-08-03 | 深圳赫飞物联科技有限公司 | It is a kind of that light-dimming method is simulated by the high P of primary side of pwm signal regulation and control |
| CN108366455B (en) * | 2018-03-01 | 2019-09-03 | 深圳赫飞物联科技有限公司 | It is a kind of that light-dimming method is simulated by the high P of primary side of pwm signal regulation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100526 Termination date: 20110618 |