CN105744671B - A kind of passive LED drive power flowed of non-isolated multichannel - Google Patents
A kind of passive LED drive power flowed of non-isolated multichannel Download PDFInfo
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- CN105744671B CN105744671B CN201610097954.8A CN201610097954A CN105744671B CN 105744671 B CN105744671 B CN 105744671B CN 201610097954 A CN201610097954 A CN 201610097954A CN 105744671 B CN105744671 B CN 105744671B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/40—Details of LED load circuits
- H05B45/44—Details of LED load circuits with an active control inside an LED matrix
- H05B45/48—Details of LED load circuits with an active control inside an LED matrix having LEDs organised in strings and incorporating parallel shunting devices
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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]
Abstract
The present invention relates to a kind of passive LED drive power flowed of non-isolated multichannel.Including half-bridge LCL resonant networks, equalizing-current network and LED load circuit, the LED load circuit includes 2N paths of LEDs lamp loads；The half-bridge LCL resonant networks realize that the stream of the 2N paths of LEDs lamp load exports by the equalizing-current network, wherein, N is the natural number more than or equal to 2.2N roads based on half-bridge LCL resonant networks proposed by the invention are passive to flow output circuit, and stream output is realized in the LED load of the tunnels of Ke Wei tetra- or any identical or different number in 2N roads, has the advantages that simple circuit, efficiency high and stream effect are good.
Description
Technical field
The present invention relates to a kind of passive LED drive power flowed of non-isolated multichannel.
Background technology
In recent years, the present situation of energy scarcity causes the mankind more to recognize the importance of energy-saving and emission-reduction.LED is as a kind of new
The lighting source of type has the advantages that long lifespan, energy-conserving and environment-protective are progressively favored by people, becomes the concern of lighting field
Focus.And the LED drive power of high efficient and reliable is then the fast-developing key of LED illumination.
Driving power is LED power source, and its forward current determines the light such as LED brightness, luminous flux and luminous efficiency
Performance indications are learned, and the exponential relationship of its forward voltage and forward current causes the voltage pulsation of very little to may result in larger electricity
Rheology.LED strip connection can be ensured that its forward current is equal, but excessive LED strip joint conference makes that driving voltage is too high, reliability
Reduce, generally use multi-string LED is in parallel in practical application forms high-power LED lighting fixture.It is discrete due to LED forward voltages
Property, it is necessary to using stream measure just can guarantee that it is each go here and there LED forward current it is equal.Therefore, multi-path flow equalizing driving is current LED
One of focus of driving power area research.
The content of the invention
It is an object of the invention to provide a kind of passive LED drive power flowed of non-isolated multichannel, and any 2N can be achieved
The stream output of paths of LEDs lamp number each paths of LEDs lamp load when identical or different, there is simple circuit, efficiency high and flow effect
The advantages that good.
To achieve the above object, the technical scheme is that：A kind of passive LED driving electricity flowed of non-isolated multichannel
Source, including half-bridge LCL resonant networks, equalizing-current network and LED load circuit, the LED load circuit include 2N paths of LEDs lamps
Load；The half-bridge LCL resonant networks realize that the stream of the 2N paths of LEDs lamp load exports by the equalizing-current network；It is described
Equalizing-current network includes the 1st to 2N electric capacity, the 1st to 2N commutation diodes, the negative pole of the 1st commutation diode and the 2nd rectification two
The positive pole of pole pipe is connected, and the first output end through the 1st capacitance connection to the half-bridge LCL resonant networks, the pole of the 1st rectification two
The positive pole of pipe is connected with the negative pole of the 1st paths of LEDs lamp load of the LED load circuit, and the 1st paths of LEDs lamp load is just
Pole is connected with the negative pole of the 2N paths of LEDs lamp loads of the LED load circuit, and through 2N capacitance connections to the half-bridge
Second output end of LCL resonant networks, the 2nd paths of LEDs lamp of the negative pole of the 2nd commutation diode and the LED load circuit are born
The positive pole connection of load, the negative pole of the 2nd paths of LEDs lamp load and the 3rd paths of LEDs lamp load of the LED load circuit are just
Pole is connected, and the second output end through N+1 capacitance connections to the half-bridge LCL resonant networks；The（2i-1）The pole of rectification two
The negative pole of pipe is connected with the positive pole of 2i commutation diodes, and through the i-th capacitance connection to the half-bridge LCL resonant networks
One output end, the（2i-1）The of the positive pole of commutation diode and the LED load circuit（2i-1）Paths of LEDs lamp load is born
Pole is connected, and the negative pole of 2i commutation diodes is connected with the positive pole of the 2i paths of LEDs lamp loads of the LED load circuit, institute
State the of the positive poles of 2i paths of LEDs lamp loads and the LED load circuit（2i+1）The positive pole connection of paths of LEDs lamp load, and
Through（N+i）Capacitance connection to the half-bridge LCL resonant networks the second output end；The negative pole of the 2N-1 commutation diodes
It is connected with the positive pole of 2N commutation diodes, and the through N capacitance connections to the half-bridge LCL resonant networks first output
End, the negative pole of the positive pole of the 2N-1 commutation diodes and the 2N-1 paths of LEDs lamp loads of the LED load circuit connect
Connect, the negative pole of the 2N commutation diodes is connected with the positive pole of the 2N paths of LEDs lamp loads of the LED load circuit；Its
In, i takes 2 to arrive N-1, wherein, N is the natural number more than or equal to 2.
In an embodiment of the present invention, the half-bridge LCL resonant networks include first to second switch pipe, main capacitance and the
One to the second inductance, the drain electrode connection power input positive pole of the first switch pipe, the source electrode connection electricity of the second switch pipe
Source inputs negative pole, and the source electrode of first switch pipe is connected with the drain electrode of second switch pipe, and electric with second respectively through the first inductance
One end of sense, one end connection of main capacitance, the other end of second inductance are first defeated as the half-bridge LCL resonant networks
Go out end, the other end of the main capacitance is connected to second output end of the power input negative pole as the half-bridge LCL resonant networks.
In an embodiment of the present invention, each paths of LEDs lamp load of the LED load circuit is more by what is be connected in series
Individual LED composition.
In an embodiment of the present invention, the LED number of each paths of LEDs lamp load is identical or different.
In an embodiment of the present invention, the N is 2, and the equalizing-current network includes the 1st to the 4th electric capacity, the 1st to the 4th rectification
Diode, the negative pole of the 1st commutation diode are connected with the positive pole of the 2nd commutation diode, and through the 1st capacitance connection to described half
First output end of bridge LCL resonant networks, the 1st paths of LEDs lamp of the positive pole of the 1st commutation diode and the LED load circuit
The negative pole connection of load, the positive pole of the 1st paths of LEDs lamp load and the 4th paths of LEDs lamp load of the LED load circuit
Negative pole connects, and the second output end through the 4th capacitance connection to the half-bridge LCL resonant networks, the negative pole of the 2nd commutation diode
Be connected with the positive pole of the 2nd paths of LEDs lamp load of the LED load circuit, the negative pole of the 2nd paths of LEDs lamp load with it is described
The positive pole of 3rd paths of LEDs lamp load of LED load circuit is connected, and through the 3rd capacitance connection to the half-bridge LCL Resonance Neural Networks
Second output end of network, the negative pole of the 3rd commutation diode are connected with the positive pole of the 4th commutation diode, and through the 2nd capacitance connection
To the first output end of the half-bridge LCL resonant networks, the positive pole of the 3rd commutation diode is negative with the 3rd paths of LEDs lamp load
Pole is connected, and the negative pole of the 4th commutation diode is connected with the positive pole of the 4th paths of LEDs lamp load of the LED load circuit.
In an embodiment of the present invention, each paths of LEDs lamp load of the LED load circuit is more by what is be connected in series
Individual LED composition.
In an embodiment of the present invention, the LED number of each paths of LEDs lamp load is identical or different.
Compared to prior art, the invention has the advantages that：It is proposed by the invention based on half-bridge LCL Resonance Neural Networks
The LED load of the passive flow equalizing circuit of 2N paths of LEDs lamps of network, the tunnels of Ke Wei tetra- or any identical or different number in 2N roads, which is realized, flows
Output, have the advantages that simple circuit, efficiency high and stream effect are good.
Brief description of the drawings
Fig. 1 is 2N paths of LEDs lamp load flow equalizing circuit of the present invention.
Fig. 2 is 4 paths of LEDs lamp load flow equalizing circuits of the invention.
Current waveform figure when Fig. 3 is respectively 200 Europe, 300 Europe, 400 Europe, 500 Europe for 4 road resistance when being not added with flow equalizing circuit.
Fig. 4 is to add current waveform figure when 4 road resistance are respectively 200 Europe, 300 Europe, 400 Europe, 500 Europe under 2 road flow equalizing circuits.
Fig. 5 is to add current waveform figure when 4 road resistance are respectively 200 Europe, 300 Europe, 400 Europe, 500 Europe under 4 road flow equalizing circuits.
Embodiment
Below in conjunction with the accompanying drawings, technical scheme is specifically described.
A kind of passive LED drive power flowed of non-isolated multichannel of the present invention, including half-bridge LCL resonant networks, flow
Network and LED load circuit, the LED load circuit include 2N paths of LEDs lamp loads；The half-bridge LCL resonant networks lead to
Cross the stream output that the equalizing-current network realizes the 2N paths of LEDs lamp load；The equalizing-current network include the 1st to 2N electric capacity,
1st is connected with the positive pole of the 2nd commutation diode to 2N commutation diodes, the negative pole of the 1st commutation diode, and through the 1st electricity
Hold the first output end for being connected to the half-bridge LCL resonant networks, positive pole and the LED load electricity of the 1st commutation diode
The negative pole connection of the 1st paths of LEDs lamp load on road, the of the positive pole of the 1st paths of LEDs lamp load and the LED load circuit
The negative pole connection of 2N paths of LEDs lamp loads, and the second output end through 2N capacitance connections to the half-bridge LCL resonant networks, the 2nd
The negative pole of commutation diode is connected with the positive pole of the 2nd paths of LEDs lamp load of the LED load circuit, the 2nd paths of LEDs lamp
The negative pole of load is connected with the positive pole of the 3rd paths of LEDs lamp load of the LED load circuit, and through N+1 capacitance connections extremely
Second output end of the half-bridge LCL resonant networks；The（2i-1）The negative pole and 2i commutation diodes of commutation diode are just
Pole is connected, and the first output end through the i-th capacitance connection to the half-bridge LCL resonant networks, the（2i-1）Commutation diode
Positive pole and the LED load circuit the（2i-1）The negative pole connection of paths of LEDs lamp load, the negative pole of 2i commutation diodes
It is connected with the positive pole of the 2i paths of LEDs lamp loads of the LED load circuit, the positive pole of the 2i paths of LEDs lamp loads and institute
State the of LED load circuit（2i+1）The positive pole connection of paths of LEDs lamp load, and through the（N+i）Capacitance connection is to the half-bridge
Second output end of LCL resonant networks；The negative pole of the 2N-1 commutation diodes is connected with the positive pole of 2N commutation diodes
Connect, and the first output end through N capacitance connections to the half-bridge LCL resonant networks, the 2N-1 commutation diodes are just
Pole is connected with the negative pole of the 2N-1 paths of LEDs lamp loads of the LED load circuit, the negative pole of the 2N commutation diodes with
The positive pole connection of the 2N paths of LEDs lamp loads of the LED load circuit；Wherein, i takes 2 to arrive N-1, wherein, N is more than or equal to 2
Natural number.
In the present invention, the half-bridge LCL resonant networks include first to second switch pipe, main capacitance and the first to the second
Inductance, the drain electrode connection power input positive pole of the first switch pipe, the source electrode connection power input of the second switch pipe are born
Pole, the source electrode of first switch pipe are connected with the drain electrode of second switch pipe, and through the first inductance respectively one end with the second inductance,
One end connection of main capacitance, the first output end of the other end of second inductance as the half-bridge LCL resonant networks are described
The other end of main capacitance is connected to second output end of the power input negative pole as the half-bridge LCL resonant networks.
In the present invention, each paths of LEDs lamp load of the LED load circuit is by the multiple LEDs being connected in series
Composition.
In the present invention, the LED number of each paths of LEDs lamp load is identical or different.
The N is 2, and the equalizing-current network includes the 1st to the 4th electric capacity, the 1st to the 4th commutation diode, the pole of the 1st rectification two
The negative pole of pipe is connected with the positive pole of the 2nd commutation diode, and through the 1st capacitance connection to the half-bridge LCL resonant networks
One output end, the positive pole of the 1st commutation diode are connected with the negative pole of the 1st paths of LEDs lamp load of the LED load circuit, institute
The positive pole for stating the 1st paths of LEDs lamp load is connected with the negative pole of the 4th paths of LEDs lamp load of the LED load circuit, and through the 4th electricity
Hold the second output end for being connected to the half-bridge LCL resonant networks, negative pole and the LED load electricity of the 2nd commutation diode
The positive pole connection of the 2nd paths of LEDs lamp load on road, the negative pole of the 2nd paths of LEDs lamp load and the 3rd of the LED load circuit the
The positive pole of paths of LEDs lamp load is connected, and the second output end through the 3rd capacitance connection to the half-bridge LCL resonant networks, and the 3rd
The negative pole of commutation diode is connected with the positive pole of the 4th commutation diode, and through the 2nd capacitance connection to the half-bridge LCL resonance
First output end of network, the positive pole of the 3rd commutation diode are connected with the negative pole of the 3rd paths of LEDs lamp load, the 4th rectification two
The negative pole of pole pipe is connected with the positive pole of the 4th paths of LEDs lamp load of the LED load circuit.
It is as follows that principle is flowed on 4 tunnels of the present invention：
Four paths of LEDs lamp loads, the 1st paths of LEDs lamp load is by D1, LED1, the composition such as 1 ... and LED1, n；2nd paths of LEDs lamp is born
Carry by D2, LED2, the composition such as 1 ... and LED2, n；3rd paths of LEDs lamp load is by D3, LED3, the composition such as 1 ... and LED3, n；4th
Paths of LEDs lamp load is by D4, LED4, the composition such as 1 ... and LED4, n.
The half-bridge LCL being made up of switching tube M1, M2, the first resonant inductance L1, the second resonant inductance L2 and resonant capacitance C0
Resonant network, resonant network output is by flowing electric capacity C12, C23, C34, C41 and commutation diode D1, D2, D3 and D4 and 4 tunnels
LED load is connected.Half-bridge LCL resonant networks are operated in resonant condition and produce constant AC signal, by flowing electric capacity
C12, C23, C34, C41 power to 4 paths of LEDs lamp loads.Stream electric capacity C12 realizes the stream of the 1st road and the 2nd paths of LEDs lamp load,
Stream electric capacity C23 realizes the stream of the 2nd road and the 3rd paths of LEDs lamp load, flows electric capacity C34 and realizes that the 3rd road and the 4th paths of LEDs lamp are born
The stream carried, flow electric capacity C41 and realize the stream of the 4th road and the 1st paths of LEDs lamp load, proposed based on LCL controlled resonant converters
Four tunnels it is passive flow output policy, any 2N roads can be extended to, and realize the identical or different Shi Ge roads of each paths of LEDs lamp number
The stream output of LED load, described N are the natural number not less than 2.
Above is presently preferred embodiments of the present invention, all changes made according to technical solution of the present invention, caused function are made
During with scope without departing from technical solution of the present invention, protection scope of the present invention is belonged to.
Claims (7)
- A kind of 1. passive LED drive power flowed of non-isolated multichannel, it is characterised in that：Including half-bridge LCL resonant networks, flow Network and LED load circuit, the LED load circuit include 2N paths of LEDs lamp loads；The half-bridge LCL resonant networks lead to Cross the stream output that the equalizing-current network realizes the 2N paths of LEDs lamp load；The equalizing-current network include the 1st to 2N electric capacity, 1st is connected with the positive pole of the 2nd commutation diode to 2N commutation diodes, the negative pole of the 1st commutation diode, and through the 1st electricity Hold the first output end for being connected to the half-bridge LCL resonant networks, positive pole and the LED load electricity of the 1st commutation diode The negative pole connection of the 1st paths of LEDs lamp load on road, the of the positive pole of the 1st paths of LEDs lamp load and the LED load circuit The negative pole connection of 2N paths of LEDs lamp loads, and the second output end through 2N capacitance connections to the half-bridge LCL resonant networks, the 2nd The negative pole of commutation diode is connected with the positive pole of the 2nd paths of LEDs lamp load of the LED load circuit, the 2nd paths of LEDs lamp The negative pole of load is connected with the positive pole of the 3rd paths of LEDs lamp load of the LED load circuit, and through N+1 capacitance connections extremely Second output end of the half-bridge LCL resonant networks；The（2i-1）The negative pole and 2i commutation diodes of commutation diode are just Pole is connected, and the first output end through the i-th capacitance connection to the half-bridge LCL resonant networks, the（2i-1）Commutation diode Positive pole and the LED load circuit the（2i-1）The negative pole connection of paths of LEDs lamp load, the negative pole of 2i commutation diodes It is connected with the positive pole of the 2i paths of LEDs lamp loads of the LED load circuit, the positive pole of the 2i paths of LEDs lamp loads and institute State the of LED load circuit（2i+1）The positive pole connection of paths of LEDs lamp load, and through the（N+i）Capacitance connection is to the half-bridge Second output end of LCL resonant networks；The negative pole of 2N-1 commutation diodes is connected with the positive pole of 2N commutation diodes, and The first output end through N capacitance connections to the half-bridge LCL resonant networks, the positive pole of 2N-1 commutation diodes with it is described The negative pole connection of the 2N-1 paths of LEDs lamp loads of LED load circuit, negative pole and the LED of the 2N commutation diodes The positive pole connection of the 2N paths of LEDs lamp loads of lamp load circuit；Wherein, i takes 2 to arrive N-1, wherein, N is the nature more than or equal to 2 Number.
- A kind of 2. passive LED drive power flowed of non-isolated multichannel according to claim 1, it is characterised in that：It is described Half-bridge LCL resonant networks include first to second switch pipe, main capacitance and the first to the second inductance, the leakage of the first switch pipe Pole connects power input positive pole, the source electrode connection power input negative pole of the second switch pipe, the source electrode of first switch pipe and the The drain electrode of two switching tubes is connected, and through the first inductance respectively one end with the second inductance, main capacitance one end be connected, described First output end of the other end of two inductance as the half-bridge LCL resonant networks, the other end of the main capacitance are connected to electricity Source inputs second output end of the negative pole as the half-bridge LCL resonant networks.
- A kind of 3. passive LED drive power flowed of non-isolated multichannel according to claim 1 or 2, it is characterised in that：Institute The each paths of LEDs lamp load for stating LED load circuit forms by the multiple LEDs being connected in series.
- A kind of 4. passive LED drive power flowed of non-isolated multichannel according to claim 3, it is characterised in that：It is described The LED number of each paths of LEDs lamp load is identical or different.
- A kind of 5. passive LED drive power flowed of non-isolated multichannel according to claim 1 or 2, it is characterised in that：Institute N is stated as 2, the equalizing-current network includes the 1st to the 4th electric capacity, the 1st to the 4th commutation diode, the negative pole of the 1st commutation diode with The positive pole of 2nd commutation diode is connected, and the first output end through the 1st capacitance connection to the half-bridge LCL resonant networks, the The positive pole of 1 commutation diode is connected with the negative pole of the 1st paths of LEDs lamp load of the LED load circuit, the 1st paths of LEDs lamp The positive pole of load is connected with the negative pole of the 4th paths of LEDs lamp load of the LED load circuit, and through the 4th capacitance connection to described Second output end of half-bridge LCL resonant networks, the 2nd paths of LEDs of the negative pole of the 2nd commutation diode and the LED load circuit The positive pole connection of lamp load, the negative pole of the 2nd paths of LEDs lamp load and the 3rd paths of LEDs lamp load of the LED load circuit Positive pole be connected, and the second output end through the 3rd capacitance connection to the half-bridge LCL resonant networks, the 3rd commutation diode Negative pole is connected with the positive pole of the 4th commutation diode, and first through the 2nd capacitance connection to the half-bridge LCL resonant networks is defeated Go out end, the positive pole of the 3rd commutation diode is connected with the negative pole of the 3rd paths of LEDs lamp load, the negative pole of the 4th commutation diode and The positive pole connection of 4th paths of LEDs lamp load of the LED load circuit.
- A kind of 6. passive LED drive power flowed of non-isolated multichannel according to claim 5, it is characterised in that：It is described Each paths of LEDs lamp load of LED load circuit forms by the multiple LEDs being connected in series.
- A kind of 7. passive LED drive power flowed of non-isolated multichannel according to claim 6, it is characterised in that：It is described The LED number of each paths of LEDs lamp load is identical or different.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610097954.8A CN105744671B (en) | 2016-02-23 | 2016-02-23 | A kind of passive LED drive power flowed of non-isolated multichannel |
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| CN107105543B (en) * | 2017-05-03 | 2018-12-07 | 四川大学 | A kind of backlight LED drive circuit |
| CN107635313B (en) * | 2017-10-19 | 2019-08-27 | 河北科技大学 | It is a kind of that the Multi-path LED driver of light modulation is realized from stream based on capacitor |
| CN108055736B (en) * | 2018-01-18 | 2019-12-31 | 福州大学 | Non-isolated full-bridge LED constant current driving power supply |
| CN108012385B (en) * | 2018-01-18 | 2019-12-31 | 福州大学 | Non-isolated multi-path current-sharing full-bridge LED drive circuit |
| CN108307558B (en) * | 2018-01-18 | 2019-12-17 | 福州大学 | full-bridge LED constant current driving power supply with multi-path current-sharing output |
| CN108235516B (en) * | 2018-01-18 | 2020-04-10 | 福州大学 | LED drive circuit with constant current and current sharing characteristics |
| CN108521697A (en) * | 2018-04-28 | 2018-09-11 | 福州大学 | A kind of LED automatic current equalizing driving circuits based on isolated form CUK converters |
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