CN204217189U - A kind of Dimmable lighting system based on electronic ballast control - Google Patents
A kind of Dimmable lighting system based on electronic ballast control Download PDFInfo
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- CN204217189U CN204217189U CN201420536077.6U CN201420536077U CN204217189U CN 204217189 U CN204217189 U CN 204217189U CN 201420536077 U CN201420536077 U CN 201420536077U CN 204217189 U CN204217189 U CN 204217189U
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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
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Abstract
The utility model discloses a kind of Dimmable lighting system based on electronic ballast control, it is characterized in that: comprise light adjusting controller, rectifier bridge stack, pfc circuit, ac input voltage testing circuit, incandescent lamp and lamp current sense circuit, rectifier bridge stack exchanges an input and is connected with controllable silicon dimmer, controllable silicon dimmer is also electrically connected ac input voltage testing circuit with rectifier bridge stack junction, ac input voltage testing circuit electrical connection light adjusting controller, rectifier bridge stack DC output end electrical connection pfc circuit, pfc circuit electrical connection incandescent lamp and light adjusting controller, incandescent lamp is electrically connected with lamp current sense circuit, lamp current sense circuit electrical connection light adjusting controller.The utility model, based on the ballast of L6574, is added a single-stage PFC circuit, then is sensed input voltage and lamp average current by the operational amplifier in L6574, realize from 20% ~ 100% light modulation, substantially increases the flexibility of illumination light modulation.
Description
Technical field
The utility model relates to energy-saving illumination technical field, especially relates to a kind of Dimmable lighting system based on electronic ballast control.
Background technology
Current electricity-saving lamp is most widely used a kind of electric light source.Although because of the sudden emergence of semiconductor lighting, electronic energy-saving lamp is no longer in the frontline technology of lighting field, and its development potentiality is indubitable.In general lighting field, LED light source can not replace electricity-saving lamp completely within considerable time.
In the face of the severe situation of global energy shortage, light regulating technology causes the concern of people day by day at lighting field.User carries out light modulation to electricity-saving lamp according to actual needs, is a kind of energy-conservation behave.To electricity-saving lamp light modulation, there is kinds of schemes available.But current light regulating technology range of application is narrower, use underaction, seriously constrain the extensively universal of energy-saving illumination.
Utility model content
Technical problem to be solved in the utility model is for above-mentioned deficiency of the prior art, a kind of Dimmable lighting system based on electronic ballast control is provided, the utility model is based on the ballast of L6574, an additional single-stage PFC circuit, by the operational amplifier in L6574, input voltage and lamp average current are sensed again, by means of frequency modulation and pressure regulation double action, conventional incandescent Traic dimmer can be used, realize from 20% ~ 100% light modulation, substantially increase the flexibility of illumination light modulation, make it in energy-conservation, play very large advantage.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of Dimmable lighting system based on electronic ballast control, it is characterized in that: comprise light adjusting controller, rectifier bridge stack, pfc circuit, ac input voltage testing circuit, incandescent lamp and lamp current sense circuit, described rectifier bridge stack exchanges an input and is connected with controllable silicon dimmer, described controllable silicon dimmer is also electrically connected ac input voltage testing circuit with rectifier bridge stack junction, the in-phase end of the operational amplifier of described ac input voltage testing circuit electrical connection light adjusting controller, described rectifier bridge stack DC output end electrical connection pfc circuit, described pfc circuit output electrical connection incandescent lamp and light adjusting controller, described incandescent lamp is electrically connected with lamp current sense circuit input, the end of oppisite phase of the operational amplifier of described lamp current sense circuit output electrical connection light adjusting controller.
Above-mentioned a kind of Dimmable lighting system based on electronic ballast control, is characterized in that: described light adjusting controller is the ballast controller of model L6574.
Above-mentioned a kind of Dimmable lighting system based on electronic ballast control, it is characterized in that: described pfc circuit is by electric capacity C2, C3, diode VD5, VD6, inductance L 2 and power MOSFET tube VT1, VT2 composition, wherein electric capacity C2, C3 is connected, and the source electrode of MOSFET pipe VT1 is connected with the drain electrode of VT2; Overall one end of electric capacity C2, C3 of described connection is connected with the drain electrode of MOSFET pipe VT1 by the diode VD5 of forward, and the other end is connected with the source electrode of MOSFET pipe VT2 by reverse diode VD6; Described inductance L 2 one end is connected with the junction of described electric capacity C2, C3, and the other end is connected with the junction of described power MOSFET tube VT1, VT2.
Above-mentioned a kind of Dimmable lighting system based on electronic ballast control, is characterized in that: described pfc circuit output is connected with incandescent lamp by electric capacity C1, inductance L 1 successively.
Above-mentioned a kind of Dimmable lighting system based on electronic ballast control, is characterized in that: MOSFET pipe VT1, VT2 grid of described pfc circuit is connected with lamp current sense circuit respectively.
Above-mentioned a kind of Dimmable lighting system based on electronic ballast control, is characterized in that: described ac input voltage testing circuit is made up of resitstance voltage divider and rectifying and wave-filtering network.
The utility model compared with prior art has the following advantages:
The utility model is based on the ballast of L6574, an additional single-stage PFC circuit, by the operational amplifier in L6574, input voltage and lamp average current are sensed again, by means of frequency modulation and pressure regulation double action, conventional incandescent Traic dimmer can be used, realize from 20% ~ 100% light modulation, substantially increase the flexibility of illumination light modulation, make it in energy-conservation, play very large advantage.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is overall structure block diagram of the present utility model;
Fig. 2 is single switch cycle inductance L 2 current waveform figure of the present utility model;
Fig. 3 is the dimming characteristic figure under 220VAC, 50Hz condition of the present utility model;
Fig. 4 is ac input voltage of the present utility model and current waveform figure.
Embodiment
As shown in Figure 1, a kind of Dimmable lighting system based on electronic ballast control, it is characterized in that: comprise light adjusting controller, rectifier bridge stack, pfc circuit, ac input voltage testing circuit, incandescent lamp and lamp current sense circuit, described rectifier bridge stack exchanges an input and is connected with controllable silicon dimmer, described controllable silicon dimmer is also electrically connected ac input voltage testing circuit with rectifier bridge stack junction, the in-phase end of the operational amplifier of described ac input voltage testing circuit electrical connection light adjusting controller, described rectifier bridge stack DC output end electrical connection pfc circuit, described pfc circuit output electrical connection incandescent lamp and light adjusting controller, described incandescent lamp is electrically connected with lamp current sense circuit input, the end of oppisite phase of the operational amplifier of described lamp current sense circuit output electrical connection light adjusting controller.
In the present embodiment, described light adjusting controller is the ballast controller of model L6574.
In the present embodiment, described pfc circuit by electric capacity C2, C3, diode VD5, VD6, inductance L 2 and power MOSFET tube VT1, VT2 composition, wherein electric capacity C2, C3 is connected, and the source electrode of MOSFET pipe VT1 is connected with the drain electrode of VT2; Overall one end of electric capacity C2, C3 of described connection is connected with the drain electrode of MOSFET pipe VT1 by the diode VD5 of forward, and the other end is connected with the source electrode of MOSFET pipe VT2 by reverse diode VD6; Described inductance L 2 one end is connected with the junction of described electric capacity C2, C3, and the other end is connected with the junction of described power MOSFET tube VT1, VT2.
In the present embodiment, described pfc circuit output is connected with incandescent lamp by electric capacity C1, inductance L 1 successively.
In the present embodiment, MOSFET pipe VT1, VT2 grid of described pfc circuit is connected with lamp current sense circuit respectively.
In the present embodiment, described ac input voltage testing circuit is made up of resitstance voltage divider and rectifying and wave-filtering network.
System Working Principle is: as shown in Figure 1, and C2, C3, VD5, VD6, L2, C3 and power MOSFET VT1, VT2 are then single-stage PFC circuit, the level and smooth light modulation of the system that realizes.
In order to the operation principle of single-level power factor correction (PFC) circuit is described, we suppose that the Dead Time (namely VT1 closes the time interval of having no progeny between VT2 conducting) of switch can be ignored; The duty ratio of VT1 and VT2 is 50%; In a switch periods, the voltage on electric capacity C2 and C3 is constant
Fig. 2 gives the waveform by the current i L2 of inductance L 2 in a switch periods.
IL2 can be divided into 4 stages.
T0 ~ t1: this period L2 charges.When t=t0, VT1 is open-minded, and VT2 disconnects, and C2 is charged to L2 by VD5, VT1, and iL2 linearly increases, and in the t1 moment, VT1 turns off, and VT2 is open-minded, and iL2 reaches forward peak value.
The body diode VDS2 conducting of t1<t≤t2: because iL2 can not suddenly change, VT2, L2 is by C2, VD5, C1, VDS2 electric discharge (voltage is UC2-UC1), and iL2 linearly reduces.In the t2 moment, iL2=0, VDS2 end, and VT2 is open-minded.
T2<t≤t3:C3 is by VT2 and VD6, and oppositely to L2 charging, iL2 negative sense linearly increases.In the t3 moment, VT2 disconnects, and VT1 is open-minded, and iL2 reaches negative peak.
T3<t≤t4: because iL2 can not suddenly change, VT1 body diode VDS1 conducting, L2 is by C3, VD6, C1, VDS1 electric discharge (voltage is UC3-UC1), and iL2 linearly reduces.In the t4 moment, iL2=0.From the t4 moment, enter new switch periods.
In fact, single-stage PFC circuit is made up of two booster circuits, iL2 two-way operation, and operates at critical discontinuous mode.After adding single-stage PFC circuit, AC input current can continue through the diode in rectifier, and Triac almost can be triggered conducting on any time of 0 ° ~ 180 °, until AC sinusoidal voltage close to zero time be just turned off, so just expand dimming scope.
For the circuit shown in Fig. 1, if load is the electricity-saving lamp of 20W, and ac input voltage scope is 180 ~ 260VAC, lowermost switch frequency is 45kHz, L2=L1=2.8mH, C1=10 μ F, C4=0.1 μ F, C5=5.6nF, VT1 and VT2 are STD4NK50 type MOSFET, and the dimming characteristic under 220V/50Hz as shown in Figure 3.Wherein, Ton is the ON time of Triac in AC line half-cycle (10ms), and Plamp is actual measurement lamp power.As seen from Figure 3, along with the increase of Triac ON time, the corresponding increase of lamp power, thus lamp brightness is increased.Otherwise Ton is shorter, lamp power is then less, and light is also darker.
Fig. 4 is ac input voltage and current waveform.As can be seen from this figure, although there is spike in AC electric current near its peak value, but Triac can conducting on arbitrfary point, rectifier diode conducting in the half period is almost from 0 ° to 180 °, and not adopting angle of flow during single-stage PFC circuit to be only 60 °, line power factor reaches more than 0.9.Certainly, add the topmost arbitrfary point of Triac between 0 ° ~ 180 ° that still make of the object of single-stage PFC circuit can be triggered conducting.
The above; it is only preferred embodiment of the present utility model; not the utility model is imposed any restrictions; every above embodiment is done according to the utility model technical spirit any simple modification, change and equivalent structure change, all still belong in the protection range of technical solutions of the utility model.
Claims (6)
1. the Dimmable lighting system based on electronic ballast control, it is characterized in that: comprise light adjusting controller, rectifier bridge stack, pfc circuit, ac input voltage testing circuit, incandescent lamp and lamp current sense circuit, described rectifier bridge stack exchanges an input and is connected with controllable silicon dimmer, described controllable silicon dimmer is also electrically connected ac input voltage testing circuit with rectifier bridge stack junction, the in-phase end of the operational amplifier of described ac input voltage testing circuit electrical connection light adjusting controller, described rectifier bridge stack DC output end electrical connection pfc circuit, described pfc circuit output electrical connection incandescent lamp and light adjusting controller, described incandescent lamp is electrically connected with lamp current sense circuit input, the end of oppisite phase of the operational amplifier of described lamp current sense circuit output electrical connection light adjusting controller.
2. according to a kind of Dimmable lighting system based on electronic ballast control according to claim 1, it is characterized in that: described light adjusting controller is the ballast controller of model L6574.
3. according to a kind of Dimmable lighting system based on electronic ballast control according to claim 1, it is characterized in that: described pfc circuit is by electric capacity C2, C3, diode VD5, VD6, inductance L 2 and power MOSFET tube VT1, VT2 composition, wherein electric capacity C2, C3 is connected, and the source electrode of MOSFET pipe VT1 is connected with the drain electrode of VT2; Overall one end of electric capacity C2, C3 of described connection is connected with the drain electrode of MOSFET pipe VT1 by the diode VD5 of forward, and the other end is connected with the source electrode of MOSFET pipe VT2 by reverse diode VD6; Described inductance L 2 one end is connected with the junction of described electric capacity C2, C3, and the other end is connected with the junction of described power MOSFET tube VT1, VT2.
4. according to a kind of Dimmable lighting system based on electronic ballast control according to claim 1, it is characterized in that: described pfc circuit output is connected with incandescent lamp by electric capacity C1, inductance L 1 successively.
5. according to a kind of Dimmable lighting system based on electronic ballast control according to claim 3, it is characterized in that: MOSFET pipe VT1, VT2 grid of described pfc circuit is connected with lamp current sense circuit respectively.
6. according to a kind of Dimmable lighting system based on electronic ballast control according to claim 1, it is characterized in that: described ac input voltage testing circuit is made up of resitstance voltage divider and rectifying and wave-filtering network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420536077.6U CN204217189U (en) | 2014-09-17 | 2014-09-17 | A kind of Dimmable lighting system based on electronic ballast control |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420536077.6U CN204217189U (en) | 2014-09-17 | 2014-09-17 | A kind of Dimmable lighting system based on electronic ballast control |
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| CN204217189U true CN204217189U (en) | 2015-03-18 |
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| CN201420536077.6U Expired - Fee Related CN204217189U (en) | 2014-09-17 | 2014-09-17 | A kind of Dimmable lighting system based on electronic ballast control |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104244543A (en) * | 2014-09-17 | 2014-12-24 | 安徽亮亮电子科技有限公司 | Light adjusting and illuminating system based on electronic ballast controller |
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2014
- 2014-09-17 CN CN201420536077.6U patent/CN204217189U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104244543A (en) * | 2014-09-17 | 2014-12-24 | 安徽亮亮电子科技有限公司 | Light adjusting and illuminating system based on electronic ballast controller |
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| 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: 20150318 Termination date: 20180917 |
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| CF01 | Termination of patent right due to non-payment of annual fee |