CN107613611B - AC/DC automatic switching LED lamp - Google Patents
AC/DC automatic switching LED lamp Download PDFInfo
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- CN107613611B CN107613611B CN201710894760.5A CN201710894760A CN107613611B CN 107613611 B CN107613611 B CN 107613611B CN 201710894760 A CN201710894760 A CN 201710894760A CN 107613611 B CN107613611 B CN 107613611B
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- constant current
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- 230000005669 field effect Effects 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000005286 illumination Methods 0.000 abstract description 5
- 238000004804 winding Methods 0.000 description 16
- 239000003990 capacitor Substances 0.000 description 15
- 238000010586 diagram Methods 0.000 description 4
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 101000958781 Homo sapiens N-alpha-acetyltransferase 80 Proteins 0.000 description 1
- 102100038333 N-alpha-acetyltransferase 80 Human genes 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention provides an alternating current and direct current automatic switching LED lamp, which comprises an AC constant current source and a DC constant current source, wherein an automatic switching circuit is arranged between the AC constant current source and the DC constant current source and is connected with the LED lamp, the automatic switching circuit comprises a clamp resistor RVOP arranged at one output end of the AC constant current source, the other end of the clamp resistor RVOP is directly connected with a trigger end of the DC constant current source, the clamp resistor RVOP enables the DC constant current source to be in a sleep state when the AC constant current source outputs voltage, and enables the DC constant current source to be in a working state when the AC constant current source does not output voltage, and the instant switching between the AC constant current source and the DC constant current source is realized by arranging the clamp resistor between the AC constant current source and the DC constant current source, so that the LED lamp is in an uninterrupted illumination state.
Description
Technical Field
The invention relates to the technical field of illumination, in particular to an alternating current and direct current automatic switching LED lamp.
Background
Global energy shortage and environmental pollution are particularly prominent in the economic high-speed development process, and energy conservation and environmental protection are the problems to be solved in urgent need for realizing the sustainable development of socioeconomic. The illumination power consumption accounts for about 12% -15% of the total power consumption every year, and the illumination power consumption is taken as a large household of energy consumption, so that a solution is required to be found as soon as possible to solve the problem. At present, there are two methods to reduce consumption of social resources: firstly, energy is saved, waste is reduced, namely, through development of technologies and production processes, products with more energy conservation, such as an LED lamp with lower power requirement, better driving characteristics, faster response speed, higher shock resistance, longer service life, environmental protection and continuously and rapidly improved luminous efficiency are generated; secondly, the light source is lightened by utilizing scientific technology, such as the driving of human kinetic energy or solar energy.
At present, in general, the LEDs are powered by an ac power source, so that the corresponding LED driving circuit is mainly designed for the ac power source, and in some cases, the LEDs may also be powered by a dc power source, so that the corresponding LED driving current source is also designed according to the dc power source, and the two are not compatible.
However, in some special occasions, such as ships, when an ac power supply fails, the LED lamp needs to be powered by an emergency power supply, and the emergency power supply is a dc power supply, so that an LED lamp capable of automatically switching between dc and ac power supply modes needs to be designed to adapt to the requirements of the environments such as ships.
Disclosure of Invention
In order to overcome the technical defects, the invention provides an alternating current and direct current automatic switching LED lamp.
The invention provides an alternating current and direct current automatic switching LED lamp, which comprises an AC constant current source and a DC constant current source, wherein an automatic switching circuit is arranged between the AC constant current source and the DC constant current source and is connected with the LED lamp, the automatic switching circuit comprises a clamp resistor RVOP arranged at one output end of the AC constant current source, the other end of the clamp resistor RVOP is directly connected with a trigger end of the DC constant current source, the clamp resistor RVOP enables the DC constant current source to be in a sleep state when the AC constant current source outputs voltage, and enables the DC constant current source to be in a working state when the AC constant current source does not output voltage.
The DC constant current source comprises a constant current chip U2 and a direct current input circuit, a trigger end of the constant current chip U2 is connected with the clamp resistor RVOP, a control end of the constant current chip U2 is connected with the switch circuit, and an output end of the direct current input circuit is provided with the switch circuit to control on-off and provide a power supply for the constant current chip U2.
The direct current input circuit comprises an input end, a rectifying circuit and a filter circuit which are sequentially connected, wherein the output end of the filter circuit is connected with an inductor L3 in series and then connected with the switch circuit.
The switching circuit comprises a field effect tube M1, a G electrode of the field effect tube M1 is connected with a gate end of the constant current chip U2, a D electrode of the field effect tube M1 is connected between the inductor L3 and the diode D10, and an S electrode series resistor R15 of the field effect tube M1 is grounded.
The clamp resistor RVOP and the trigger end of the constant current chip U2 are respectively connected with the diode D10 through the resistor R16 and grounded through the resistor R17.
The model of the constant current chip U2 is SN3948.
The AC constant current source comprises a constant current chip U1 and an alternating current-direct current conversion circuit.
The model of the constant current chip U1 is RED2401.
The DC constant current source is integrated with the LED lamp.
The AC constant current source may be external.
The invention has the beneficial effects that: by arranging the clamping resistor between the AC constant current source and the DC constant current source, when the AC constant current source has output voltage, the DC constant current source enters a dormant state, when the AC constant current source does not have output voltage, the DC constant current source obtains a starting signal by the clamping resistor, the power supply of the DC constant current source is directly switched, and the DC constant current source is immediately stopped when the AC constant current source has output voltage, so that the instantaneous switching between the AC constant current source and the DC constant current source is realized, and the LED lamp is in an uninterrupted illumination state.
Drawings
Fig. 1 is a schematic circuit diagram of an AC constant current source of the present invention.
Fig. 2 is a schematic circuit diagram of the DC constant current source of the present invention.
Fig. 3 is a schematic circuit diagram of the LED lamp of the present invention.
Fig. 4, 5, 6 and 7 are schematic diagrams after cutting in fig. 1.
Description of the embodiments
Embodiments of the invention are further described below with reference to the accompanying drawings:
as shown in the figure, the invention provides an alternating current and direct current automatic switching LED lamp, which comprises an AC constant current source and a DC constant current source, wherein an automatic switching circuit is arranged between the AC constant current source and the DC constant current source and is connected with the LED lamp, the automatic switching circuit comprises a clamp resistor RVOP arranged at one output end of the AC constant current source, the other end of the clamp resistor RVOP is directly connected with a trigger end of the DC constant current source, the clamp resistor RVOP enables the DC constant current source to be in a sleep state when the AC constant current source outputs voltage, and enables the DC constant current source to be in a working state when the AC constant current source does not output voltage.
When the AC constant current source and the DC constant current source are powered on, the AC constant current source and the DC constant current source start to be started, and as the DC constant current source sets RVOP clamping voltage, when the DC constant current source drive detects RVOP clamping voltage, the DC constant current source is in a sleep state, the DC constant current source drive has no output, and LED light emission is realized by the AC constant current source drive output.
When the AC constant current source loses voltage, the DC constant current source cannot obtain RVOP clamping voltage, the DC constant current source immediately enters a normal working state from a sleep state, and the LED outputs light from the DC constant current source.
When the AC constant current source and the DC constant current source supply power simultaneously, the AC constant current source preferentially works to output, and the DC constant current source is in a sleep state and has no output.
The AC constant current source is powered off, the DC constant current source outputs immediately, and the LED emits light in an uninterrupted state.
The DC constant current source comprises a constant current chip U2 and a direct current input circuit, a trigger end of the constant current chip U2 is connected with the clamp resistor RVOP, a control end of the constant current chip U2 is connected with the switch circuit, and an output end of the direct current input circuit is provided with the switch circuit to control on-off and provide a power supply for the constant current chip U2.
The direct current input circuit comprises an input end, a rectifying circuit and a filter circuit which are sequentially connected, wherein the output end of the filter circuit is connected with an inductor L3 in series and then connected with the switch circuit.
The switching circuit comprises a field effect tube M1, a G electrode of the field effect tube M1 is connected with a gate end of the constant current chip U2, a D electrode of the field effect tube M1 is connected between the inductor L3 and the diode D10, and an S electrode series resistor R15 of the field effect tube M1 is grounded.
The clamp resistor RVOP and the trigger end of the constant current chip U2 are respectively connected with the diode D10 through the resistor R16 and grounded through the resistor R17.
The model of the constant current chip U2 is SN3948.
The GATE of the constant current chip U2 is connected with the G pole of the field effect transistor M1, the S pole of the field effect transistor M1 is connected with the CS end of the constant current chip U2 and is grounded through a resistor R15, the TOFF end of the constant current chip U2 is connected with the resistor R14 in series and is grounded, the D pole of the field effect transistor M1 is respectively connected with one end of an inductor L3 and the anode of a diode D10, the other end of the inductor L3 is connected with the output end of a rectifier bridge DG, any one input end of the rectifier bridge DG is connected with a fuse FUS2 in series, an electrolytic capacitor C12 is connected in parallel between the output ends of the rectifier bridge DG, the VCC end of the constant current chip U2 is connected with the other end of the inductor L3 through a resistor R13 and is grounded in parallel with the capacitor C13, the cathode of the diode D10 is connected with the positive input end of the LED lamp, the grounded electrolytic capacitor C14, the grounded serially connected resistor R16 and the resistor R17 are sequentially connected in parallel, the OVP end of the constant current chip U2 is connected with the output end of the AC constant current source after being connected with the OVP end of the resistor in series, the FB end of the rectifier chip U2 is directly connected with the anode of the LED lamp, and the anode of the LED lamp is connected with the resistor R18 in series. When the AC constant current source is not output, the DC constant current source outputs power.
The AC constant current source comprises a constant current chip U1 and an alternating current-direct current conversion circuit. The model of the constant current chip U1 is RED2401.
220AC input end, one path is connected with the input ends of diodes D1, D2, D3 and D4 forming a rectifier bridge in series, two ends of the inductor L1 are respectively connected with a capacitor C1 and a capacitor C2 in parallel, the other path of 220AC input end is respectively connected with the ground after passing through a capacitor C11 and a capacitor C4 and then connected with a COM end, an electrolytic capacitor C9 is connected between output ends of the rectifier bridge in parallel, a positive output end of the rectifier bridge is respectively connected with a collector electrode of a triode Q1 and a resistor R7, a base electrode of the triode Q1 is connected with one end of a first secondary winding of a transformer T1 in series with the resistor R1, an emitter electrode of the triode Q1 is respectively connected with one end of a second main winding of the transformer T1 and the other end of the first secondary winding of the transformer T1, one end of the second main winding of the transformer is connected with the inductor L2, the other end of the first secondary winding of the transformer T1 is connected with a collector electrode of the triode Q2, the inductor L2 is connected with one end of a first main winding of the border device T2, a base electrode series resistor R2 of the triode Q2 is connected with one end of a second secondary winding, an emitter electrode of the triode Q2 is connected with the other end of the second secondary winding, a diode D5 is connected between the emitter electrode and the collector electrode of the triode Q1 in parallel, a capacitor C8 and a diode D6 are sequentially connected between the emitter electrode and the collector electrode of the triode Q2 in parallel, the other end of the second secondary winding of the transformer T2 is sequentially connected with a resistor R3 and a resistor R4 in series and is connected with a COM end, a capacitor C3 is arranged between the second secondary winding and a 220AC input end, the first main winding of the transformer T1 is respectively connected with a TX1 end and a TX2 end of the constant current chip U1, a GS end of the constant current chip U1 is respectively connected with the other end of the first main winding of the transformer T2, the constant current chip U1 is connected with the COM end through a resistor R6 and a resistor R5, a VFB end of the constant current chip U1 is sequentially connected with a resistor R8 through a resistor R12 and a capacitor C6, the VDD end of the constant current chip U1 is connected with a resistor R9 in series and then is connected with a resistor R8, and is connected with a COM end sequentially through a resistor R11 and a capacitor C5, a capacitor C7 connected in parallel between the resistor R8 and the resistor R10 is connected with the COM end, the resistor R8 is connected with the resistor R7 in series, and a diode D7 is connected between an inductor L2 and the resistor R7 and between the inductor R8 in parallel. The first secondary winding of the transformer T2 is connected with the anode of the diode D8, the second secondary winding of the transformer T2 is connected with the anode of the diode D9, the diode D8 and the cathode of the diode D9 are connected with the clamp resistor RVOP, the other ends of the first secondary winding and the second secondary winding of the transformer T2 are connected with the cathode of the LED lamp together, an electrolytic capacitor C10 and a resistor R12 are sequentially arranged between the cathode of the diode D8 and the cathode of the LED lamp, the cathode of the diode D8 is connected with the anode of the LED lamp in series, and the AC constant current source provides power.
The LED lamp is formed by connecting a plurality of LEDs in series in parallel.
The capacitor C10 and the resistor R12 are sequentially connected in parallel at the cathodes of the two diodes D8 and D9.
The DC constant current source and the LED lamp are integrated into a whole, and the DC constant current source is arranged on the same aluminum substrate of the LED, so that the volume is saved.
The AC constant current source is independently externally arranged and outputs plus and minus, and is connected with the LED light source by adopting the direct plug connection of the lower end.
The examples should not be construed as limiting the invention, and any modifications based on the spirit of the invention should be within the scope of the invention.
Claims (8)
1. The utility model provides an alternating current, direct current automatic switch-over LED lamp, its includes AC constant current source and DC constant current source, be equipped with automatic switch-over circuit between AC constant current source and the DC constant current source, automatic switch-over circuit is connected its characterized in that with the LED lamp: the automatic switching circuit comprises a clamping resistor RVOP arranged at one output end of an AC constant current source, the other end of the clamping resistor RVOP is directly connected with a trigger end of a DC constant current source, the clamping resistor RVOP enables the DC constant current source to be in a sleep state when the AC constant current source outputs voltage, the DC constant current source is in a working state when the AC constant current source does not output voltage, the DC constant current source comprises a constant current chip U2 and a direct current input circuit, the trigger end of the constant current chip U2 is connected with the clamping resistor RVOP, a control end of the constant current chip U2 is connected with the switch circuit, the output end of the direct current input circuit is provided with the switch circuit for controlling on-off and supplying power to the constant current chip U2, and the AC constant current source comprises a constant current chip U1 and an alternating current-direct current conversion circuit.
2. The alternating current and direct current automatic switching LED lamp according to claim 1, wherein the direct current input circuit comprises an input end, a rectifying circuit and a filter circuit which are sequentially connected, and the output end of the filter circuit is connected with the switch circuit after being connected with the inductor L3 in series.
3. The LED lamp according to claim 1 or 2, wherein the switching circuit comprises a field effect transistor M1, a G pole of the field effect transistor M1 is connected to a gate terminal of the constant current chip U2, a D pole of the field effect transistor M1 is connected between the inductor L3 and the diode D10, and an S pole of the field effect transistor M1 is connected in series with a resistor R15 to be grounded.
4. The ac/dc automatic switching LED lamp according to claim 3, wherein the clamp resistor RVOP and the trigger end of the constant current chip U2 are respectively connected to the diode D10 through the resistor R16 and the resistor R17 is grounded.
5. The ac/dc automatic switching LED lamp according to claim 1 or 2, wherein the constant current chip U2 is of the type SN3948.
6. The ac/dc automatic switching LED lamp according to claim 1, wherein the constant current chip U1 is of the type RED2401.
7. The ac/DC automatically switched LED lamp of claim 1, wherein said DC constant current source is integrated with said LED lamp.
8. The AC/dc automatically switched LED lamp of claim 1, wherein said AC constant current source is externally connectable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710894760.5A CN107613611B (en) | 2017-09-28 | 2017-09-28 | AC/DC automatic switching LED lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710894760.5A CN107613611B (en) | 2017-09-28 | 2017-09-28 | AC/DC automatic switching LED lamp |
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| Publication Number | Publication Date |
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| CN107613611A CN107613611A (en) | 2018-01-19 |
| CN107613611B true CN107613611B (en) | 2023-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710894760.5A Active CN107613611B (en) | 2017-09-28 | 2017-09-28 | AC/DC automatic switching LED lamp |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109348603A (en) * | 2018-11-30 | 2019-02-15 | 吉林大学 | The fast and stable constant source flowing system that double lamp failure diagnosis are automatically switched |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09294373A (en) * | 1996-04-25 | 1997-11-11 | Fuji Electric Co Ltd | Snubber circuit of insulation type ac/dc conversion device |
| JP2013021756A (en) * | 2011-07-07 | 2013-01-31 | Canon Inc | Power supply device |
| KR101229265B1 (en) * | 2011-12-20 | 2013-02-04 | 국방과학연구소 | Integrated transformer and high step-up dc/dc converter using the same |
| CN103957651A (en) * | 2014-05-06 | 2014-07-30 | 复旦大学 | High-frequency HID electronic ballast with self-adaptation circuit and application thereof |
| CN207304996U (en) * | 2017-09-28 | 2018-05-01 | 周安平 | Alternating current and direct current automatic switchover LED light |
-
2017
- 2017-09-28 CN CN201710894760.5A patent/CN107613611B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09294373A (en) * | 1996-04-25 | 1997-11-11 | Fuji Electric Co Ltd | Snubber circuit of insulation type ac/dc conversion device |
| JP2013021756A (en) * | 2011-07-07 | 2013-01-31 | Canon Inc | Power supply device |
| KR101229265B1 (en) * | 2011-12-20 | 2013-02-04 | 국방과학연구소 | Integrated transformer and high step-up dc/dc converter using the same |
| CN103957651A (en) * | 2014-05-06 | 2014-07-30 | 复旦大学 | High-frequency HID electronic ballast with self-adaptation circuit and application thereof |
| CN207304996U (en) * | 2017-09-28 | 2018-05-01 | 周安平 | Alternating current and direct current automatic switchover LED light |
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| CN107613611A (en) | 2018-01-19 |
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