CN107613611A - Alternating current and direct current automatic switchover LED - Google Patents

Alternating current and direct current automatic switchover LED Download PDF

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Publication number
CN107613611A
CN107613611A CN201710894760.5A CN201710894760A CN107613611A CN 107613611 A CN107613611 A CN 107613611A CN 201710894760 A CN201710894760 A CN 201710894760A CN 107613611 A CN107613611 A CN 107613611A
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constant
current
current sources
circuit
automatic switchover
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CN201710894760.5A
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CN107613611B (en
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周安平
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30Semiconductor 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 present invention provides a kind of exchange,Direct current automatic switchover LED,It includes AC constant-current sources and DC constant-current sources,Automatic switch-over circuit is provided between the AC constant-current sources and DC constant-current sources,The automatic switch-over circuit is connected with LED,The automatic switch-over circuit includes the clamp resistance RVOP for being arranged on an output end of AC constant-current sources,Triggering end of the other end of the clamp resistance RVOP then directly with DC constant-current sources is connected,The clamp resistance RVOP is in the AC constant-current sources output voltage,So that DC constant-current sources are in sleep state,In the AC constant-current sources not output voltage,Then so that DC constant-current sources are in running order,By setting clamp resistance between AC constant-current sources and DC constant-current sources,Realize the instantaneous switching between AC constant-current sources and DC constant-current sources,So that LED is in continual illumination condition.

Description

Alternating current and direct current automatic switchover LED
Technical field
The present invention relates to lighting technical field, more particularly, to a kind of alternating current and direct current automatic switchover LED.
Background technology
Global energy shortage and environmental pollution shows especially prominent in the China of rapid economic development, energy-conservation and ring Guarantor is that China realizes Sustainable Socioeconomic Development institute urgent problem.Annual illumination power consumption accounts for whole electric energy The 12% ~ 15% of consumption, the rich and influential family as energy resource consumption, it is necessary to search out method as early as possible and solve this problem.At present, there are two kinds Method can reduce the consumption of social resources:When save the energy, reduce waste, i.e., by science and technology and production technology development, The more energy-saving product of generation, as lower power demand, preferable drive characteristic, very fast response speed, compared with high anti-seismic ability, compared with Long life, the LED lamps of luminous efficiency that is green and constantly quickly improving;Second, utilize science and technology, such as people The driving of body kinetic energy or solar energy carrys out some bright light sources.
At present, in general, LED is powered by AC power, therefore, corresponding LED drive circuit It is designed primarily directed to AC power, and in some cases, LED can be also powered by dc source, then phase The LED drive current source answered is also to be designed according to dc source, and both can not be compatible.
But in some special occasions, on naval vessel, LED lamp is needed when AC power breaks down, and is changed by meeting an urgent need Power supply is powered, and emergency power supply is then dc source, it is therefore desirable to design one kind can automatically switch direct current with exchange supply LED electrically, to adapt to the demand of the environment such as naval vessel.
The content of the invention
In order to overcome the technical deficiency of the above, the present invention provides a kind of alternating current and direct current automatic switchover LED.
The present invention provides a kind of alternating current and direct current automatic switchover LED, and it includes AC constant-current sources and DC constant-current sources, the AC Automatic switch-over circuit is provided between constant-current source and DC constant-current sources, the automatic switch-over circuit is connected with LED, the automatic switchover Circuit includes the clamp resistance RVOP for being arranged on an output end of AC constant-current sources, and the other end of the clamp resistance RVOP is then straight Connect and be connected with the triggering end of DC constant-current sources, the clamp resistance RVOP is in the AC constant-current sources output voltage so that DC constant currents Source is in sleep state, in the AC constant-current sources not output voltage, then make it that DC constant-current sources are in running order.
The DC constant-current sources include constant current chip U2 and direct-flow input circuit, constant current chip U2 triggering end and clamper electricity RVOP connections are hindered, constant current chip U2 control terminal is connected with on-off circuit, and the output end of direct-flow input circuit has on-off circuit control Break-make processed, and provide power supply to constant current chip U2.
Direct-flow input circuit includes input, rectification circuit, the filter circuit being sequentially connected, the output of the filter circuit It is connected after the series inductance L3 of end with on-off circuit.
The on-off circuit includes FET M1, and FET M1 G poles are connected with constant current chip U2 door end, field effect Should pipe M1 D poles be connected between inductance L3 and diode D10, FET M1 S poles series resistance R15 ground connection.
Connected respectively by resistance R16 and diode D10 between the triggering end of the clamp resistance RVOP and constant current chip U2 Connect and resistance R17 is grounded.
The model SN3948 of the constant current chip U2.
The AC constant-current sources include constant current chip U1 and ac-dc converter circuit.
The model RED2401 of the constant current chip U1.
The DC constant-current sources become one with the LED.
The AC constant-current sources can be external.
Beneficial effects of the present invention:By setting clamp resistance between AC constant-current sources and DC constant-current sources, in AC constant-current sources When having output voltage, then DC constant-current sources are caused to enter resting state, and when AC constant-current sources are without output voltage, then the clamp resistance So that DC constant-current sources obtain enabling signal, directly switch DC constant current source power supplies, and there is output voltage to stop immediately in AC constant-current sources one Only DC constant-current sources, realize the instantaneous switching between AC constant-current sources and DC constant-current sources so that LED is in continual illumination shape State.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of the AC constant-current sources of the present invention.
Fig. 2 is the circuit theory diagrams of the DC constant-current sources of the present invention.
Fig. 3 is the circuit theory diagrams of the LED of the present invention.
Fig. 4, Fig. 5, Fig. 6, Fig. 7 are the schematic diagram after Fig. 1 cutting.
Embodiment
Embodiments of the present invention is further illustrated below in conjunction with the accompanying drawings:
As illustrated, the present invention provides a kind of alternating current and direct current automatic switchover LED, it includes AC constant-current sources and DC constant-current sources, institute State and automatic switch-over circuit is provided between AC constant-current sources and DC constant-current sources, the automatic switch-over circuit is connected with LED, described automatic Switching circuit includes being arranged on the clamp resistance RVOP of an output end of AC constant-current sources, the other end of the clamp resistance RVOP Then the triggering end directly with DC constant-current sources is connected, and the clamp resistance RVOP is in the AC constant-current sources output voltage so that DC Constant-current source is in sleep state, in the AC constant-current sources not output voltage, then make it that DC constant-current sources are in running order.
When AC constant-current sources, DC constant-current sources are both powered up, AC constant-current sources and DC constant-current sources start to start, due to DC constant-current sources RVOP clamp voltages are set, and when the driving of DC constant-current sources detects RVOP clamp voltages, DC constant-current sources are in sleep state, DC constant currents Without any output, LED is luminous to drive output to realize by AC constant-current sources for source driving.
When AC constant-current sources dead electricity is pressed, DC constant-current sources cannot get RVOP clamp voltages, DC constant-current sources from sleep state at once Into normal operating conditions, LED has the output of DC constant-current sources luminous.
During its feature simultaneously when AC constant-current sources, DC constant-current sources are powered, AC constant-current source priority tasks have output, DC constant-current sources In sleep state without output.
AC constant-current source dead electricity, DC constant-current sources have output at once, and LED is luminous to be in uninterrupted state.
The DC constant-current sources include constant current chip U2 and direct-flow input circuit, constant current chip U2 triggering end and clamper electricity RVOP connections are hindered, constant current chip U2 control terminal is connected with on-off circuit, and the output end of direct-flow input circuit has on-off circuit control Break-make processed, and provide power supply to constant current chip U2.
Direct-flow input circuit includes input, rectification circuit, the filter circuit being sequentially connected, the output of the filter circuit It is connected after the series inductance L3 of end with on-off circuit.
The on-off circuit includes FET M1, and FET M1 G poles are connected with constant current chip U2 door end, field effect Should pipe M1 D poles be connected between inductance L3 and diode D10, FET M1 S poles series resistance R15 ground connection.
Connected respectively by resistance R16 and diode D10 between the triggering end of the clamp resistance RVOP and constant current chip U2 Connect and resistance R17 is grounded.
The model SN3948 of the constant current chip U2.
Constant current chip U2 GATE termination FETs M1 G poles, FET M1 S poles and constant current chip U2 CS ends Connection, and be grounded by resistance R15, constant current chip U2 TOFF ends series resistance R14 ground connection, FET M1 D poles difference Connect inductance L3 one end and diode D10 anode, the output end of the inductance L3 other end then with rectifier bridge DG is connected, rectifier bridge DG any one input inline fuse FUS2, the parallel electrolytic electric capacity C12 between rectifier bridge DG output end, constant current core Piece U2 VCC ends are connected by resistance R13 and the L3 of the inductance other end, and shunt capacitance C13 is grounded, diode D10 the moon The positive input terminal of pole and LED connects, and is parallel with the electrochemical capacitor C14 of ground connection, the resistance R16 being connected in series of ground connection successively The output end of AC constant-current sources is followed by with resistance R17, constant current chip U2 OVP ends series connection clamp resistance RVOP, constant current chip U2's FB ends directly connect the negative pole of LED, and resistance R18 is in series between the negative pole and rectifier bridge DG of LED.In AC constant-current sources without output When, then exported and powered by DC constant-current sources.
The AC constant-current sources include constant current chip U1 and ac-dc converter circuit.The model of the constant current chip U1 RED2401。
220AC inputs, fuse FUS1, inductance L1 are sequentially connected in series all the way with forming diode D1, D2, D3 of rectifier bridge Connected with D4 input, the another way that shunt capacitance C1 and electric capacity C2,220AC input are distinguished at inductance L1 both ends is then divided Not by being grounded after electric capacity C11 and electric capacity C4 is followed by COM ends, parallel electrolytic electric capacity C9 between the output end of rectifier bridge, rectification The positive output end of bridge then connects triode Q1 colelctor electrode and resistance R7 respectively, and triode Q1 base series resistor R1 is followed by becoming One end of depressor T1 the first secondary windings, triode Q1 emitter stage then one end with transformer T1 the second main winding respectively And the other end connection of transformer T1 the first secondary windings, one end of the second main winding of transformer are connected with inductance L2, The other end of transformer T1 the first secondary windings is connected with triode Q2 colelctor electrode, inductance L2 and edge device T2 the first master One end connection of winding, triode Q2 base series resistor R2 connect one end of second subprime winding, triode Q2 emitter stage The other end of second subprime winding is connect, parallel diode D5, triode Q2 wherein between triode Q1 emitter stage and colelctor electrode Emitter stage and colelctor electrode between shunt capacitance C8 and diode D6 successively, the other end of transformer T2 second subprime winding is then It is sequentially connected in series resistance R3 and resistance R4 is connected with COM ends, and electric capacity C3 is provided between 220AC inputs, the of transformer T1 One main winding is connected with constant current chip U1 TX1 ends and TX2 ends respectively, constant current chip U1 GS ends then with transformer T2 first The other end connection of main winding, and COM ends are connect by resistance R6 and resistance R5 respectively, constant current chip U1 VFB ends then series electrical It is connected after resistance R10 with resistance R8, and passes sequentially through resistance R12 and electric capacity C6 and connect COM ends, constant current chip U1 vdd terminal series electrical It is connected after resistance R9 with resistance R8, and passes sequentially through resistance R11 and electric capacity C5 and connect COM ends, electricity in parallel between resistance R8 and resistance R10 Hold C7 and connect COM ends, resistance R8 is connected in series with resistance R7, parallel diode D7 between inductance L2 and resistance R7 and resistance R8.Become Anode of depressor T2 the first secondary windings then with diode D8 is connected, transformer T2 second subprime winding then with diode D9 Anode connection, diode D8 and diode D9 negative electrode is then connected with clamp resistance RVOP, transformer T2 first level around The other end of group and second subprime winding simultaneously together with connect the negative pole of LED, and diode D8 negative electrode and the negative pole of LED it Between be sequentially provided with electrochemical capacitor C10 and resistance R12 after, connect after diode D8 negative electrode series diode D11 with the positive pole of LED Connect, power supply is provided by AC constant-current sources.
The LED that the LED has some series connection is composed in parallel.
In two diode D8 and diode D9 negative electrode point solution electric capacity C10 and resistance R12 in parallel successively.
The DC constant-current sources become one with the LED, and both are provided in into an entirety, DC constant-current sources On LED same aluminium base, volume is saved.
AC constant-current sources independently it is external its output+,-, be connected with LED light source using connect lower end face insert connect.
Embodiment is not construed as limitation of the present invention, any spiritual improvements introduced based on the present invention, all Ying Ben Within the protection domain of invention.

Claims (10)

1. a kind of alternating current and direct current automatic switchover LED, it includes AC constant-current sources and DC constant-current sources, and the AC constant-current sources are permanent with DC Automatic switch-over circuit is provided between stream source, the automatic switch-over circuit is connected with LED, it is characterised in that:The automatic switchover Circuit includes the clamp resistance RVOP for being arranged on an output end of AC constant-current sources, and the other end of the clamp resistance RVOP is then straight Connect and be connected with the triggering end of DC constant-current sources, the clamp resistance RVOP is in the AC constant-current sources output voltage so that DC constant currents Source is in sleep state, in the AC constant-current sources not output voltage, then make it that DC constant-current sources are in running order.
2. alternating current and direct current automatic switchover LED according to claim 1, it is characterised in that the DC constant-current sources include perseverance Stream chip U2 and direct-flow input circuit, constant current chip U2 triggering end are connected with clamp resistance RVOP, constant current chip U2 control End processed is connected with on-off circuit, and the output end of direct-flow input circuit has on-off circuit to control break-make, and constant current chip U2 is provided Power supply.
3. alternating current and direct current automatic switchover LED according to claim 2, it is characterised in that direct-flow input circuit include according to Input, rectification circuit, the filter circuit of secondary connection, connect with on-off circuit after the output end series inductance L3 of the filter circuit Connect.
4. alternating current and direct current automatic switchover LED according to claim 1 or 2, it is characterised in that the on-off circuit bag FET M1 is included, FET M1 G poles are connected with constant current chip U2 door end, and FET M1 D poles are connected on inductance L3 Between diode D10, FET M1 S poles series resistance R15 ground connection.
5. alternating current and direct current automatic switchover LED according to claim 4, it is characterised in that the clamp resistance RVOP with It is connected respectively by resistance R16 with diode D10 between constant current chip U2 triggering end and resistance R17 is grounded.
6. the alternating current and direct current automatic switchover LED according to Claims 2 or 3, it is characterised in that the constant current chip U2 Model SN3948.
7. alternating current and direct current automatic switchover LED according to claim 1, it is characterised in that the AC constant-current sources include perseverance Flow chip U1 and ac-dc converter circuit.
8. alternating current and direct current automatic switchover LED according to claim 7, it is characterised in that the type of the constant current chip U1 Number it is RED2401.
9. alternating current and direct current automatic switchover LED according to claim 1, it is characterised in that the DC constant-current sources with it is described LED becomes one.
10. alternating current and direct current automatic switchover LED according to claim 1, it is characterised in that the AC constant-current sources can be outer Connect.
CN201710894760.5A 2017-09-28 2017-09-28 AC/DC automatic switching LED lamp Active CN107613611B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

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