CN206575633U - A kind of long-life LED drive power based on ripple compensation - Google Patents
A kind of long-life LED drive power based on ripple compensation Download PDFInfo
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- CN206575633U CN206575633U CN201720134602.5U CN201720134602U CN206575633U CN 206575633 U CN206575633 U CN 206575633U CN 201720134602 U CN201720134602 U CN 201720134602U CN 206575633 U CN206575633 U CN 206575633U
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Abstract
A kind of long-life LED drive power based on ripple compensation, including an AC input cell, a rectification filtering unit, an isolated Zeta circuits, an output rectification unit, a ripple compensation unit, an integrated control unit, a LED load unit；Wherein, the AC of rectification filtering unit is connected with 220V AC powers, the isolated Zeta circuits of direct current side joint, isolated Zeta circuits are connect on the left of output rectification unit, right side connects ripple compensating unit and LED load unit, connection power switch pipe on the left of integrated control unit, right side connection LED load unit.The utility model power supply, which can be realized, to be detected and is compensated to inductive current ripple to realize constant current output, extends the life-span of LED drive power, and power factor is high, stability is good.
Description
Technical field
The utility model is related to a kind of long-life LED drive power of ripple compensation, and it belongs to Switching Power Supply especially LED
Driving power supply application field.
Background technology
As technology develops, requirement of the illumination market to LED drive power is stricter, such as high reliability, high efficiency, nothing
Stroboscopic, long-life etc..Traditional LED drive power is filtered and voltage stabilizing using electrochemical capacitor, and the longevity of general electrochemical capacitor
Life only has 5k~10kh, is differed greatly with semiconductor devices LED 80k~100kh working life, so LED drive power
In electrochemical capacitor seriously constrain its bulk life time, limit the further development of LED illumination industry.Therefore, do not influenceing
Reliability, efficiency, without stroboscopic on the premise of, using the small CBB electric capacity of long-life, capacitance or metal membrane capacitance be LED driving electricity
The development trend in source.Existing solution has the pulsation for reducing input power using harmonic current injection, realizes electroless electricity
The purpose of appearance, and harmonic amplitude is bigger, power factor PF is just smaller, it is impossible to meet relevant harmonic standard requirement.
The content of the invention
The above-mentioned technical problem existed for existing LED drive power, the utility model provides a kind of based on ripple benefit
The long-life LED drive power repaid, ensure high reliability, high efficiency, without stroboscopic while, eliminate in LED drive power
Electrochemical capacitor, effectively extension LED drive power service life.
The technical solution of the utility model is：A kind of long-life LED drive power based on ripple compensation, including：One hands over
Flow input block, a rectification filtering unit, an isolated Zeta circuits, an output rectification unit, a ripple compensation unit, a collection
Into control unit and LED load unit；It is characterized in that：AC input cell is sequentially connected rectification filtering unit, isolated
Zeta circuits, output rectification unit, ripple compensation unit and LED load unit, LED load unit simultaneously with integrated control list
Member connection.
The rectification filtering unit is made up of diode D1, diode D2, diode D3, diode D4 and electric capacity C1；Institute
State diode D1 negative electrodes with diode D2 negative electrodes, electric capacity C1 positive poles to be connected, diode D1 anodes are connected with diode D3 negative electrodes, two
Pole pipe D2 anodes are connected with diode D4 negative electrodes, and diode D3 anodes are connected with diode D4 anodes, electric capacity C1 negative poles；It is described
Isolated Zeta electric routing switch pipe S1, inductance L1, electric capacity C2, transformer T1, resistance R1 compositions；The drain electrode of the switching tube S1
It is connected with electric capacity C1 positive poles, switching tube S1 source electrodes are connected with inductance L1 one end, electric capacity C2 negative poles, electric capacity C2 positive poles and transformer T1
Primary side Np Same Name of Ends is connected, and the inductance L1 other ends are connected with resistance R1, transformer T1 primary sides Np non-same polarity；It is described defeated
Go out rectification unit to be made up of switching tube S2, diode D5；The switching tube S2 drain electrodes and transformer T1 secondary Ns Same Name of Ends phase
Even, switching tube S2 source electrodes are connected with diode D5 negative electrodes, inductance L2 one end, and diode D5 anodes are non-with transformer T1 secondary Ns's
Same Name of Ends is connected；The ripple compensation unit is by inductance L2, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, electric capacity
C4, electric capacity C5, amplifier A1, PNP type triode Q1, NPN type triode Q2 compositions, wherein triode Q1 and triode Q2 compositions
Expand current circuit, the output current to amplifier A1 is amplified；Described inductance L2 one end is connected with diode D5 negative electrodes, inductance
The L2 other ends are connected with resistance R2, electric capacity C4 positive poles, resistance R2 right-hand members and resistance R4, resistance R6, electric capacity C3 positive poles, LED load
Positive pole is connected, and amplifier A1 end of oppisite phase is connected with resistance R3, resistance R5, amplifier A1 in-phase ends and resistance R4, electric capacity C5 positive poles
It is connected, amplifier A1 output ends are connected with triode Q1 base stages, triode Q2 base stage, triode Q1 emitter stages and triode Q2
Emitter stage, resistance R5, resistance R6 be connected, electric capacity C5 negative poles, triode Q2 grounded collectors；The LED load unit is by n
LED series connection, electric capacity C3 compositions；The LED anode is connected with resistance R2, resistance R4, resistance R6, electric capacity C3 positive poles, LED cathode
It is connected with electric capacity C3 negative poles, diode D5 anodes；The integrated control unit is made up of optocoupler and pwm chip.
The rectification filtering unit reality being made up of diode D1, diode D2, diode D3, diode D4 and electric capacity C1
Show AC-DC converter and output voltage is filtered.
The isolated Zeta circuit realirations being made up of switching tube S1, inductance L1, electric capacity C2, transformer T1, resistance R1
Regulation and PFC to output voltage, transformer T1 play a part of isolation input and output, it is ensured that in power frequency electric
Press the security of driving power supply under work.
The output rectification unit being made up of switching tube S2, diode D5 is realized to output voltage rectification, using with opening
The synchronous pwm signal controlling switch pipe S2 of pipe S1 turn-on and turn-off are closed, reduce the rectifier loss of driving power supply.
It is described by inductance L2, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, electric capacity C4, electric capacity C5, amplifier
A1, PNP type triode Q1, the ripple compensation unit of NPN type triode Q2 compositions, which are realized, to be detected and mends to inductance L2 current ripples
Output current is repaid, so as to realize constant current output.
Compared with other prior arts, the utility model has the advantages that：It is of the present utility model to be mended based on ripple
The long-life LED drive power repaid, by using isolated Zeta circuits, it is easy to realize input and output isolation, meet PF will
Ask and driving power supply condition of work；Detection compensation is carried out using resistance detection inductive current and with amplifier to inductive current,
Enable to that the life-span of product is longer, stability is more preferable.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram of the long-life LED drive power based on ripple compensation of the present utility model；
Fig. 2 is a kind of key operation waveforms of the long-life LED drive power based on ripple compensation of the present utility model；
Fig. 3 is a kind of long-life LED drive power based on ripple compensation of the present utility model when switching tube is turned on
Equivalent circuit；
Fig. 4 is a kind of long-life LED drive power based on ripple compensation of the present utility model when switching tube is turned off
Equivalent circuit.
Embodiment
1-4 is illustrated to embodiment of the present utility model below in conjunction with the accompanying drawings.
As shown in figure 1, be a kind of schematic diagram of the long-life LED drive power based on ripple compensation, including：Exchange input
Unit, rectification filtering unit, isolated Zeta circuits, output rectification unit, ripple compensation unit, integrated control unit and LED
Load unit；Wherein, AC input cell is sequentially connected rectification filtering unit, isolated Zeta circuits, output rectification unit, line
Ripple compensating unit and LED load unit, LED load unit are connected with integrated control unit simultaneously.Wherein, the rectifying and wave-filtering list
Member is made up of diode D1, diode D2, diode D3, diode D4 and electric capacity C1；The diode D1 negative electrodes and diode
D2 negative electrodes, electric capacity C1 positive poles are connected, and diode D1 anodes are connected with diode D3 negative electrodes, diode D2 anodes and diode D4
Negative electrode is connected, and diode D3 anodes are connected with diode D4 anodes, electric capacity C1 negative poles；The isolated Zeta electric routing switch pipe
S1, inductance L1, electric capacity C2, transformer T1, resistance R1 compositions；The drain electrode of the switching tube S1 is connected with electric capacity C1 positive poles, switch
Pipe S1 source electrodes are connected with inductance L1 one end, electric capacity C2 negative poles, and electric capacity C2 positive poles are connected with transformer T1 primary sides Np Same Name of Ends, electricity
The sense L1 other ends are connected with resistance R1, transformer T1 primary sides Np non-same polarity；The output rectification unit is by switching tube S2, two
Pole pipe D5 is constituted；The switching tube S2 drain electrodes are connected with transformer T1 secondary Ns Same Name of Ends, switching tube S2 source electrodes and diode
D5 negative electrodes, inductance L2 one end are connected, and diode D5 anodes are connected with transformer T1 secondary Ns non-same polarity；The ripple is mended
Unit is repaid by inductance L2, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, electric capacity C4, electric capacity C5, amplifier A1, PNP
Type triode Q1, NPN type triode Q2 are constituted, and wherein triode Q1 and triode Q2 compositions expand current circuit, to amplifier A1's
Output current is amplified；Described inductance L2 one end is connected with diode D5 negative electrodes, the inductance L2 other ends and resistance R2, electric capacity C4
Positive pole is connected, and resistance R2 right-hand members are connected with resistance R4, resistance R6, electric capacity C3 positive poles, LED load positive pole, amplifier A1 end of oppisite phase
It is connected with resistance R3, resistance R5, amplifier A1 in-phase ends are connected with resistance R4, electric capacity C5 positive poles, amplifier A1 output ends and three
Pole pipe Q1 base stages, triode Q2 base stage are connected, emitter stage, resistance R5, the resistance R6 of triode Q1 emitter stages and triode Q2
It is connected, electric capacity C5 negative poles, triode Q2 grounded collectors；The LED load unit is by n LED lamp is connected, electric capacity C3 is constituted；
The LED anode is connected with resistance R2, resistance R4, resistance R6, electric capacity C3 positive poles, LED cathode and electric capacity C3 negative poles, diode
D5 anodes are connected；The integrated control unit is made up of optocoupler PC817 and pwm chip HV9930.
Fig. 2 is the long-life LED drive power key operation waveforms based on ripple compensation, and as can be seen from the figure circuit has
Two operation modes.Circuit enters after stable state, inductive current iL2DC component I can be decomposed intoL2And AC compounentIt
With that is,
The electric current for flowing through LED load is
If
So iO=IL2。 (4)
Therefore, as long as meeting formula (3), the electric current that active ripple compensation circuit can make to flow through LED load is steady state value.
1. job analysis
1) switch mode 1 [0-t1]:Switching tube S1 and switching tube S2 are simultaneously turned on, and diode D5 bears anti-phase electricity because of two ends
Press and turn off, its equivalent circuit is as shown in Figure 3.Three loops are formed in circuit：Vin-D1-S1-L1-R1-D4 constitutes primary Ioops,
Power supply Vin charges to inductance L1；C2-Np-R1-D4-Vin-D1-S1 constitutes primary Ioops, and electric capacity C2 is through transformer T1 to inductance Ns
Transmit energy；Ns-S2-L2-R2-LED constitutes primary Ioops, and inductance Ns powers to inductance L2, LED load, inductance L2 electric currents iL2Line
Property rise.Assuming that transformer T1 secondary Ns both end voltages are Us, output voltage is Uo, and switch periods are Ts, and switching tube conducting is accounted for
Sky is than being D, then inductance L2 current increment is：
Switch [the t of mode 21-t2]:Switching tube S1 and switching tube S2 are simultaneously turned off, and diode D5 conductings are inductive current iL2
Afterflow, its equivalent circuit is as shown in Figure 4.Two loops are formed in circuit：L1-Np-C2 formation primary Ioops, inductance L1 is to electric capacity C2
Charging；L2-LED-D5 forms another loop, and inductance L2 powers to LED load, inductance L2 electric currents iL2Linear decline, inductance L2's
Current increment is：
Mode 2 is put into the subsequent work cycle after terminating.Due to the △ i in a switch periodsL2(on)+△iL2(off)=
0, thus LED drive power work condition be：
It these are only preferable possible embodiments of the present utility model, and non-limiting product form of the present utility model and sample
Formula, appropriate change or modification that any person of an ordinary skill in the technical field is done to it, all should be regarded as not departing from this reality
With new patent category.
Claims (3)
1. a kind of long-life LED drive power based on ripple compensation, including：One AC input cell (1), a rectifying and wave-filtering list
First (2), an isolated Zeta circuits (3), an output rectification unit (4), a ripple compensation unit (5), an integrated control unit
And LED load unit (7) (6)；It is characterized in that：AC input cell is sequentially connected rectification filtering unit, isolated zeta electricity
Road, output rectification unit, ripple compensation unit, LED load unit, LED load unit are connected with integrated control unit simultaneously.
2. a kind of long-life LED drive power based on ripple compensation according to claim 1, it is characterised in that：It is described
Rectification filtering unit (2) is made up of diode D1, diode D2, diode D3, diode D4 and electric capacity C1；The diode D1
Negative electrode is connected with diode D2 negative electrodes, electric capacity C1 positive poles, and diode D1 anodes are connected with diode D3 negative electrodes, diode D2 anodes
It is connected with diode D4 negative electrodes, diode D3 anodes are connected with diode D4 anodes, electric capacity C1 negative poles；The isolated Zeta electricity
Road (3) is made up of switching tube S1, inductance L1, electric capacity C2, transformer T1, resistance R1；The drain electrode of the switching tube S1 and electric capacity C1
Positive pole is connected, and switching tube S1 source electrodes are connected with inductance L1 one end, electric capacity C2 negative poles, and electric capacity C2 positive poles are with transformer T1 primary sides Np's
Same Name of Ends is connected, and the inductance L1 other ends are connected with resistance R1, transformer T1 primary sides Np non-same polarity；The output rectification unit
(4) it is made up of switching tube S2, diode D5；The switching tube S2 drain electrodes are connected with transformer T1 secondary Ns Same Name of Ends, switch
Pipe S2 source electrodes are connected with diode D5 negative electrodes, inductance L2 one end, the non-same polarity of diode D5 anodes and transformer T1 secondary Ns
It is connected；The ripple compensation unit (5) is by inductance L2, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, electric capacity C4, electricity
Hold C5, amplifier A1, PNP type triode Q1, NPN type triode Q2 compositions；Described inductance L2 one end connects diode D5 negative electrodes,
The inductance L2 other ends are connected with resistance R2, electric capacity C4 positive poles, resistance R2 right-hand members and resistance R4, resistance R6, electric capacity C3 positive poles, LED
Load positive pole to be connected, amplifier A1 end of oppisite phase is connected with resistance R3, resistance R5, amplifier A1 in-phase ends and resistance R4, electric capacity C5
Positive pole is connected, and amplifier A1 output ends are connected with triode Q1 base stages, triode Q2 base stage, triode Q1 emitter stages and three poles
Pipe Q2 emitter stage, resistance R5, resistance R6 is connected, and electric capacity C5 negative poles, triode Q2 colelctor electrodes are connected to the ground；The LED load
Unit (7) is by n LED is connected, electric capacity C3 is constituted；The LED anode and resistance R2, resistance R4, resistance R6, electric capacity C3 positive poles
It is connected, LED cathode is connected with electric capacity C3 negative poles, diode D5 anodes；The integrated control unit (6) is controlled by optocoupler and PWM
Chip is constituted.
3. a kind of long-life LED drive power based on ripple compensation according to claim 2, it is characterised in that：Circuit
Middle electric capacity C2, electric capacity C3 use long-life polypropylene capactive, it is to avoid use short-life electrochemical capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720134602.5U CN206575633U (en) | 2017-02-15 | 2017-02-15 | A kind of long-life LED drive power based on ripple compensation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720134602.5U CN206575633U (en) | 2017-02-15 | 2017-02-15 | A kind of long-life LED drive power based on ripple compensation |
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| CN206575633U true CN206575633U (en) | 2017-10-20 |
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| CN201720134602.5U Expired - Fee Related CN206575633U (en) | 2017-02-15 | 2017-02-15 | A kind of long-life LED drive power based on ripple compensation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106793342A (en) * | 2017-02-15 | 2017-05-31 | 江南大学 | A kind of long-life LED drive power based on ripple compensation |
| CN112087842A (en) * | 2019-05-27 | 2020-12-15 | 李宗凤 | Practical LED driver |
-
2017
- 2017-02-15 CN CN201720134602.5U patent/CN206575633U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106793342A (en) * | 2017-02-15 | 2017-05-31 | 江南大学 | A kind of long-life LED drive power based on ripple compensation |
| CN112087842A (en) * | 2019-05-27 | 2020-12-15 | 李宗凤 | Practical LED driver |
| CN112087842B (en) * | 2019-05-27 | 2024-04-26 | 李宗凤 | Practical LED driver |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171020 Termination date: 20190215 |
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| CF01 | Termination of patent right due to non-payment of annual fee |