CN103427679A - AC/DC constant-current conversion unit, driver and illuminating device having driver - Google Patents
AC/DC constant-current conversion unit, driver and illuminating device having driver Download PDFInfo
- Publication number
- CN103427679A CN103427679A CN201210168093XA CN201210168093A CN103427679A CN 103427679 A CN103427679 A CN 103427679A CN 201210168093X A CN201210168093X A CN 201210168093XA CN 201210168093 A CN201210168093 A CN 201210168093A CN 103427679 A CN103427679 A CN 103427679A
- Authority
- CN
- China
- Prior art keywords
- constant current
- converting unit
- capacitor
- transformer
- driver
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/285—Single converters with a plurality of output stages connected in parallel
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/10—Composite arrangements of magnetic circuits
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/10—Composite arrangements of magnetic circuits
- H01F3/14—Constrictions; Gaps, e.g. air-gaps
-
- 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]
- H05B45/30—Driver circuits
- H05B45/35—Balancing circuits
-
- 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]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/385—Switched mode power supply [SMPS] using flyback topology
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0064—Magnetic structures combining different functions, e.g. storage, filtering or transformation
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Dc-Dc Converters (AREA)
- Rectifiers (AREA)
Abstract
The invention relates to an AC/DC constant-current conversion unit (1) for a drive (100). The AC/DC constant-current conversion unit (1) comprises at least two output channels (A and B) respectively having positive output terminals (A1 and B1) and negative output terminals (A2 and B2) and at least two transformers (11a and 11b). The transformers (11a and 11b) correspond to the output channels (A and B) and are arranged side by side spatially, so that magnetic files between the transformers (11a and 11b) are mutually influenced and thus currents (I) outputted by all the output channels (A and B) are balanced. In addition, the invention also relates to the driver (100) having the AC/DC constant-current conversion unit (1) and an illuminating device having the driver (100).
Description
Technical field
The present invention relates to a kind of constant current of the AC/DC for driver converting unit.In addition, the invention still further relates to a kind of driver and a kind of lighting device with driver of the above-mentioned type with AC/DC constant current converting unit of the above-mentioned type.
Background technology
The LED lighting device has as cold light source that photochromic pure, light beam is concentrated, color rendering index is high, good temp characteristic, and have that electric quantity consumption is low, stable performance, life-span are long, pollution-free, use the advantages such as simple.For LED light source is driven, a large amount of dissimilar AC-DCLED drivers has appearred on market.Simultaneously, in order to meet the specific (special) requirements of illumination, usually going back the demand motive utensil has multichannel output, but the output of driver De Mei road all needs to export identical or approximately uniform electric current.
For solving the problems of the technologies described above, in the solution according to prior art shown in Fig. 1, propose, two or more constant current of the DC/DC with switch mode operation transducers in parallel after AC/DC constant voltage transducer, to realize exporting the driver of identical or approximately uniform electric current.In the other a solution according to prior art shown in Fig. 2, propose, the DC/DC constant current transducer of two or more linear adjustment modes work in parallel after AC/DC constant voltage transducer, to realize exporting the driver of identical or approximately uniform electric current.
Yet the shortcoming of above-mentioned two kinds of solutions commonly used is in the prior art, the driver of the above-mentioned type, in order to realize multichannel output, need be equipped with at least two output stages usually.Yet more output stage means larger cost and lower efficiency.
Summary of the invention
For solving the problems of the technologies described above, the present invention proposes a kind of constant current of the AC/DC for driver converting unit.AC/DC constant current converting unit according to the present invention is designed to single-stage, has lower cost and higher efficiency.In addition, the invention allows for a kind of driver with AC/DC constant current converting unit of the above-mentioned type, driver according to the present invention can be realized multichannel output by a unique output stage, and the electric current of every road output is basic identical.The invention allows for a kind of lighting device with driver of the above-mentioned type.
First purpose of the present invention realizes thus by a kind of AC/DC constant current converting unit, this AC/DC constant current converting unit comprises at least two output channels that have respectively cathode output end and cathode output end, wherein, AC/DC constant current converting unit also comprises at least two transformers, wherein each transformer is corresponding to an output channel, and transformer is spatially arranged each other abreast, makes the magnetic field between transformer interact, with the electric current of balanced each output channel output.In design of the present invention, because transformer spatially is arranged side by side, therefore the magnetic field of transformer is enough to the impact magnetic field of adjacent transformer with it, thereby affects the electric current of the output channel output of each transformer, reaches the purpose of the electric current of the different transformer output channel of equilibrium.
Preferably, a side column of the magnetic core of the magnetic core of a transformer side column and adjacent transformer is abutted together each other side by side.Thus, make transformer distance each other enough near, thereby can make the magnetic field of transformer can reciprocal influence.
Further preferably, the magnetic core of each described transformer comprises two E shape magnetic cores positioned opposite to each other, wherein each E shape magnetic core has two sub-side columns and a sub-center pillar, wherein the sub-center pillar of two E shape magnetic cores is in direct contact with one another, to be combined into the center pillar of magnetic core, the sub-side column of two E shape magnetic cores is combined into the side column of magnetic core, and the relative end face of every two relative sub-side columns keeps predetermined spacing, to form air gap.In addition, each transformer also comprises armature winding and the secondary winding be wrapped on center pillar, and wherein, the armature winding of each transformer is connected in series, to form the armature winding string, and the number of turn between the armature winding of each transformer and the number of turn between secondary winding identical.In design of the present invention, because the number of turn between armature winding is identical, and be one another in series between it, so the magnetic field of armature winding cancels each other in magnetic circuit, do not produce interaction.And the electric current of output channel output is mainly determined by secondary winding.According to Ampere circuit law:
In addition, the coupling between the primary and secondary winding is to form the total magnetic loop of equivalence by center pillar and each side column of opening air gap, because air gap has been arranged, has also just to a certain degree avoided primary current that transformer is entered saturated.
Preferably, AC/DC constant current converting unit also comprises at least two filter circuits, wherein, between the secondary winding of each transformer and each output channel, is connected with a described filter circuit.This filter circuit can be reduced in ripple in output current effectively.
Advantageously, each filter circuit comprises the cathode output end that is connected to corresponding output channel and at least one first capacitor between cathode output end, and wherein, the first capacitor in filter circuit is common ground each other.Further advantageously, the first capacitor design is the electrolytic capacitor that capacity is larger, the certain also capacitor of other types, MLCC for example, MKP, the capacitors such as MKT.
Further preferably, AC/DC constant current converting unit also comprises at least two the first diodes, each transformer is corresponding to first diode, and the positive pole of the first diode is connected to the first end of secondary winding and the negative pole of the first diode is connected to the intermediate node between the first capacitor and cathode output end.The first diode is for preventing that electric current is from cathode output end reverse flow round trip level winding.
Another object of the present invention is by a kind of driver realization, and this driver comprises rectifier bridge; Detecting unit; And control unit; And the AC/DC constant current converting unit of the above-mentioned type, wherein, AC/DC constant current converting unit is connected to electric current and the voltage of the output channel output of rectifier bridge and detecting unit detection AC/DC constant current converting unit, and control unit is controlled AC/DC constant current converting unit according to the testing result of detecting unit.In design of the present invention, detecting unit is detected and is compared the electric current of each output channel, has the signal of the output channel of bigger electric current to produce representative, so that AC/DC constant current converting unit is controlled.In like manner, detecting unit also detects the output channel that reaches at first protection voltage, and produces the signal that represents this output channel, so that AC/DC constant current converting unit is controlled.
Preferably, driver also comprises the 3rd capacitor, and the first end of the 3rd capacitor is connected between the first end and rectifier bridge of armature winding string, and the second end of the 3rd capacitor is connected to ground.The less electric capacity of the 3rd capacitor capable of selecting capacity, with for filtering after rectifier bridge.
Preferably, driver also comprises the leakage inductance bleed-off circuit, this leakage inductance bleed-off circuit comprises the first resistance, the second capacitor and the second diode, wherein, the second end that the first end of the first resistance is connected to the first end of armature winding string of AC/DC constant current converting unit and the first resistance is connected to the negative pole of the second diode, the positive pole of the second diode is connected to the second end of armature winding string, and the first end of the second capacitor is connected to the intermediate node between the first end of the first end of armature winding string and the first resistance, the second end of the second capacitor is connected to the intermediate node between the negative pole of the second end of the first resistance and the second diode.
Advantageously, control unit comprises PWM controller and transistor, and wherein the output of PWM controller is connected to transistorized control electrode, and transistorized work electrode is connected to the second end of armature winding string, and transistorized reference electrode is connected to ground.In design of the present invention, the first resistance, the second capacitor and the second diode have formed FLYBACK RCD absorbing circuit, it is mainly to offer leakage inductance bleed-off circuit of primary coil when transistor turn-offs, and avoids the overtension on transistor to damage transistor.
Advantageously, detecting unit comprises at least two voltage detecting inputs, at least two current detecting inputs and detects output, wherein, each voltage detecting input is connected to respectively the intermediate node between the first capacitor and cathode output end, each current detecting input is connected to the intermediate node between the first capacitor and cathode output end by the second resistance respectively, and detects the input that output is connected to the PWM controller.Detecting unit is mainly that the electric current to exporting is detected, and so that electric current is remained in predetermined scope, and voltage is detected, and to prevent output channel, overvoltage occurs.
Last purpose of the present invention is by a kind of lighting device realization, and this lighting device has the driver of the above-mentioned type.
The accompanying drawing explanation
Accompanying drawing forms the part of this specification, for helping further to understand the present invention.These accompanying drawings illustrate embodiments of the invention, and are used for illustrating principle of the present invention together with specification.Identical parts mean with identical label in the accompanying drawings.Shown in figure:
Fig. 1 is according to the schematic diagram of the first embodiment of the driver of prior art;
Fig. 2 is the schematic diagram according to the second embodiment of the driver of prior art;
Fig. 3 is the structural representation according to the transformer of AC/DC constant current converting unit of the present invention;
Fig. 4 is the theory diagram according to driver of the present invention;
Fig. 5 is the circuit diagram according to driver of the present invention.
Embodiment
It should be understood that if do not have other dated especially, the feature of different exemplary embodiment described herein can be bonded to each other.
Fig. 3 shows the structural representation according to the transformer of AC/DC constant current converting unit 1 of the present invention.As seen from the figure, this AC/DC constant current converting unit 1 is by two independent transformer 11a, and 11b forms, wherein each transformer 11a, 11b is corresponding to an output channel A, B, and transformer 11a, 11b spatially arranges each other abreast, make transformer 11a, magnetic field between 11b interacts, with balanced each output channel A, and the electric current I of B output.In the present embodiment, adopted two transformer 11a, 11b, thus realized two-way output.But according to design principle of the present invention, in other embodiment, also can adopt a plurality of transformers, thereby realize multichannel output.
From Fig. 3, further, a side column 12 of transformer 11a magnetic core is abutted together each other side by side with a side column 12 of the magnetic core of adjacent transformer 11b.Next according to the specific embodiment shown in Fig. 3, the structure of AC/DC constant current converting unit 1 of the present invention is set forth.As seen from the figure, each transformer 11a, the magnetic core of 11b all comprises two E shape magnetic cores 13 positioned opposite to each other, wherein each E shape magnetic core 13 has two sub-side columns 14 and a sub-center pillar 15, and wherein the sub-center pillar 15 of two E shape magnetic cores 13 is in direct contact with one another, to be combined into transformer 11a, the center pillar 16 of the magnetic core of 11b, the sub-side column 14 of two E shape magnetic cores 13 is combined into the side column 12 of magnetic core, and the relative end face of every two relative sub-side columns 14 keeps predetermined spacing, to form air gap.At this, it is emphasized that, embodiment shown in Fig. 3 is only preferred design of the present invention, and it can realize two-way output, but in order to realize multichannel output, only need to be at the transformer 11a shown in Fig. 3, the side column side of 11b arranges that a plurality of transformers get final product abreast.
In addition, each transformer 11a, 11b also comprises the armature winding P1 be wrapped on center pillar 16, P2 and secondary winding S1, S2, wherein, and each transformer 11a, the armature winding P1 of 11b, P2 is connected in series, to form armature winding string P.Each transformer 11a, the armature winding P1 of 11b, the number of turn between P2 and secondary winding S1, the number of turn between S2 is identical.So armature winding P1, cancelling each other in the magnetic field of P2 in magnetic circuit, does not produce interaction.And output channel A, the electric current I of B output is mainly by secondary winding S1, and S2 determines.According to Ampere circuit law:
Wherein, the number of turn that N1 is secondary winding S1; The number of turn that N2 is secondary winding S2; l
eThe length of magnetic circuit for this reason; H is magnetic field intensity, and B is magnetic flux density; μ is magnetic permeability.
From top equation, as μ enough during large and N1=N2: i_LED1-i_LED2 ≈ 0
In design of the present invention, adjacent transformer 11a, the magnetic circuit between 11b is not opened air gap, and magnetic permeability μ effect relatively is large.Therefore can obtain the two-way output current substantially equal.
In addition, AC/DC constant current converting unit 1 according to the present invention also comprises at least two filter circuit 17a, 17b, and this filter circuit 17a, 17b is also not shown in Fig. 3, and concrete structure is referring to the circuit diagram shown in Fig. 5.Be connected with filter circuit 17a between the secondary winding S 1 of transformer 11a and output channel A, between the secondary winding S2 of transformer 11b and output channel B, be connected with filter circuit 17b.As can be seen from Fig. 5, filter circuit 17a comprises the cathode output end A1 that is connected to corresponding output channel A and two the first capacitor C11, C12 between cathode output end A2, filter circuit 17b comprises the cathode output end B1 that is connected to corresponding output channel B and two the first capacitor C13, C14 between cathode output end B2, wherein, the first capacitor C13, the C14 of the first capacitor C11, the C12 of filter circuit 17a and filter circuit 17b common ground GND each other.In specific embodiments of the invention, each transformer 11a, 11b is to there being a filter circuit 17a, and 17b is the first capacitor namely.In the specific embodiment shown in Fig. 5, be connected with two the first capacitor C11 and C12 that are connected in parallel to each other between the cathode output end A1 of output channel A and cathode output end A2, and also be connected with two the first capacitor C13 and C14 that are connected in parallel to each other between the cathode output end B1 of output channel B and cathode output end B2.Certainly, the quantity of the first capacitor can be determined according to actual designing requirement, and its quantity is not limited only to two, can be also one or a plurality of capacitor be connected in parallel to each other.In addition, adopted in the present embodiment electrolytic capacitor as the first capacitor, this is because electrolytic capacitor has larger capacity usually.
Fig. 4 shows the theory diagram according to driver 100 of the present invention.As seen from the figure, driver 100 according to the present invention comprises rectifier bridge 2; Detecting unit 3; Control unit 4; And AC/DC constant current converting unit 1, wherein, AC/DC constant current converting unit 1 is connected to the output channel A of rectifier bridge 2 and detecting unit 3 detection AC/DC constant current converting units 1, electric current I and the voltage V of B output, control unit 4 is controlled AC/DC constant current converting unit 1 according to the testing result of detecting unit 3.
Fig. 5 shows the circuit diagram according to driver 100 of the present invention.As seen from the figure, driver 100 also comprises the 3rd capacitor C3, and the first end of the 3rd capacitor C3 is connected between the first end and rectifier bridge 2 of armature winding string P, and the second end of the 3rd capacitor C3 is connected to ground GND.
From Fig. 5, also can see, AC/DC constant current converting unit 1 also comprises that two the first diode D11, D12(are referring to Fig. 5), each transformer 11a, 11b is corresponding to the first diode D11, a D12.As seen from the figure, the positive pole of the first diode D11 is connected to the first end of secondary winding S1 and the negative pole of the first diode D11 is connected to the intermediate node between the first capacitor C12 and cathode output end A1, and the positive pole of the first diode D12 is connected to the first end of secondary winding S2 and the negative pole of the first diode D12 is connected to the intermediate node between the first capacitor C14 and cathode output end B1.According to design principle of the present invention, each transformer 11a, 11b is to first diode should be arranged, and this first diode can prevent that the current reflux of cathode output end is to transformer 11a, the secondary winding S1 of 11b, S2.
In addition, from Fig. 5, further, driver 100 also comprises leakage inductance bleed-off circuit 5, with the transformer 11a of the described AC/DC constant current converting unit 1 of releasing, the leakage inductance of 11b.Leakage inductance bleed-off circuit 5 comprises the first resistance R 1, the second capacitor C2 and the second diode D2, wherein, the second end that the first end of the first resistance R 1 is connected to the first end of armature winding string P of AC/DC constant current converting unit 1 and the first resistance R 1 is connected to the negative pole of the second diode D2, the positive pole of the second diode D2 is connected to the second end of armature winding string P, and the first end of the second capacitor C2 is connected to the intermediate node between the first end of the first end of armature winding string P and the first resistance R 1, the second end of the second capacitor C2 is connected to the intermediate node between the negative pole of the second end of the first resistance R 1 and the second diode D2.The first resistance R 1, the second capacitor C2 and the second diode D2 have formed FLYBACK RCD absorbing circuit, it is mainly to offer leakage inductance bleed-off circuit of primary coil P1 when transistor Q1 turn-offs, and avoids the overtension on transistor Q1 to damage transistor Q1.
Although only with respect to a kind of special characteristic or the aspect that discloses embodiments of the invention in numerous embodiments, but as any given or application-specific is desired, combination can be carried out with one or more further features or the aspect of other execution mode in these features or aspect.Although, this illustrate and described specific embodiment, it will be appreciated by one skilled in the art that under the prerequisite that does not deviate from scope of the present invention, various optional and/or execution modes that be equal to can replace the specific embodiment describing and illustrate.The application is intended to cover any modification or the distortion of specific embodiment discussed herein.So the present invention is intended to only be limited by claim and equivalent thereof.
Reference number
1 AC/DC constant current converting unit
11a, the 11b transformer
12 side columns
13 E shape magnetic cores
14 sub-side columns
15 sub-center pillars
16 center pillars
17a, the 17b filter circuit
2 rectifier bridges
3 detecting units
31 first voltage detecting inputs
32 second voltages detect input
33 first current detecting inputs
34 second current detecting inputs
35 detect output
4 control units
41 PWM controllers
5 leakage inductance bleed-off circuits
R1 the first resistance
R2, R3 the second resistance
D11, D12 the first diode
D2 the second diode
C11, C12, C13, C14 the first capacitor
C2 the second capacitor
C3 the 3rd capacitor
The Q1 transistor
P armature winding string
P1, the P2 armature winding
S1, the S2 secondary winding
A, the B output channel
A1, the B1 cathode output end
A2, the B2 cathode output end
The I electric current
V voltage
GND ground
100 drivers
Claims (16)
1. the converting unit of the AC/DC constant current for driver (100) (1), comprise that at least two have respectively cathode output end (A1, B1) and cathode output end (A2, B2) output channel (A, B), it is characterized in that, described AC/DC constant current converting unit (1) also comprises at least two transformer (11a, 11b), each described transformer (11a wherein, 11b) corresponding to a described output channel (A, B), and described transformer (11a, 11b) spatially arrange abreast each other, make described transformer (11a, magnetic field 11b) interacts, with balanced each described output channel (A, B) electric current (I) of output.
2. AC/DC constant current converting unit according to claim 1 (1), it is characterized in that, a side column (12) of the magnetic core of a described transformer (11a, 11b) is abutted together each other side by side with a side column (12) of the magnetic core of adjacent described transformer.
3. AC/DC constant current converting unit according to claim 2 (1), it is characterized in that, each described transformer (11a, magnetic core 11b) all comprises two E shape magnetic cores (13) positioned opposite to each other, wherein each described E shape magnetic core (13) has two sub-side columns (14) and a sub-center pillar (15), wherein the described sub-center pillar (15) of two described E shape magnetic cores (13) is in direct contact with one another, with the center pillar (16) that is combined into described magnetic core, the described sub-side column (14) of two described E shape magnetic cores (13) is combined into the described side column (12) of described magnetic core, and the relative end face of every two relatively described sub-side columns (14) keeps predetermined spacing, to form air gap.
4. AC/DC constant current converting unit according to claim 3 (1), it is characterized in that, each described transformer (11a, 11b) also comprises the armature winding (P1, P2) that is wrapped on described center pillar (16) and secondary winding, and (S 1, S2), wherein, the armature winding (P1 of each described transformer (11a, 11b), P2) be connected in series, to form armature winding string (P).
5. AC/DC constant current converting unit according to claim 4 (1), is characterized in that, (S 1, and the number of turn between S2) is identical for the number of turn between the described armature winding (P1, P2) of each described transformer (11a, 11b) and described secondary winding.
6. according to the described AC/DC constant current of claim 4 or 5 converting unit (1), it is characterized in that, described AC/DC constant current converting unit (1) also comprises at least two filter circuit (17a, 17b), wherein, at each described transformer (11a, (S 1 for secondary winding 11b), S2) and between each described output channel (A, B) be connected with a described filter circuit (17a, 17b).
7. AC/DC constant current converting unit according to claim 6 (1), it is characterized in that, each described filter circuit (17a, 17b) comprise and be connected to corresponding described output channel (A, B) described cathode output end (A1, B1) and described cathode output end (A2, B2) the first capacitor of at least one between (C11, C12, C13, C14), wherein, described the first capacitor (C11, C12, C13, C14) in each described filter circuit (17a, 17b) is common ground (GND) each other.
8. AC/DC constant current converting unit according to claim 7 (1), is characterized in that, described the first capacitor (C11, C12, C13, C14) is designed to electrolytic capacitor.
9. AC/DC constant current converting unit according to claim 7 (1), it is characterized in that, described AC/DC constant current converting unit (1) also comprises at least two the first diode (D11, D12), each described transformer (11a, 11b) corresponding to described first a diode (D11, D12), and described the first diode (D11, D12) positive pole is connected to described secondary winding (S1, S2) first end and described the first diode (D11, D12) negative pole is connected to described the first capacitor (C11, C12, C13, C14) and described cathode output end (A1, B1) intermediate node between.
10. the driver for lighting device (100), comprising: rectifier bridge (2); Detecting unit (3); And control unit (4), it is characterized in that, described driver (100) also comprises according to the described AC/DC constant current of any one in claim 1 to 9 converting unit (1), wherein, described AC/DC constant current converting unit (1) is connected to the output channel (A that described rectifier bridge (2) and described detecting unit (3) detect described AC/DC constant current converting unit (1), B) electric current (I) and the voltage (V) of output, described control unit (4) is controlled described AC/DC constant current converting unit (1) according to the testing result of described detecting unit (3).
11. driver according to claim 10 (100), it is characterized in that, described driver (100) also comprises the 3rd capacitor (C3), the first end of described the 3rd capacitor (C3) is connected between the first end and described rectifier bridge (2) of described armature winding string (P), and the second end of described the 3rd capacitor (C3) is connected to ground (GND).
12. driver according to claim 10 (100), is characterized in that, described driver (100) also comprises leakage inductance bleed-off circuit (5), with the leakage inductance of the transformer (11a, 11b) of the described AC/DC constant current converting unit (1) of releasing.
13. driver according to claim 12 (100), it is characterized in that, described leakage inductance bleed-off circuit (5) comprises the first resistance (R1), the second capacitor (C2) and the second diode (D2), wherein, the second end that the first end of described the first resistance (R1) is connected to the first end of armature winding string (P) of described AC/DC constant current converting unit (1) and described the first resistance (R1) is connected to the negative pole of described the second diode (D2), the positive pole of described the second diode (D2) is connected to the second end of described armature winding string (P), and the first end of described the second capacitor (C2) is connected to the intermediate node between the first end of the first end of described armature winding string (P) and described the first resistance (R1), the second end of described the second capacitor (C2) is connected to the intermediate node between the negative pole of the second end of described the first resistance (R1) and described the second diode (D2).
14. according to claim 10 to the described driver of any one (100) in 13, it is characterized in that, described control unit (4) comprises PWM controller (41) and transistor (Q1), the output of wherein said PWM controller (41) is connected to the control electrode of described transistor (Q1), and the work electrode of described transistor (Q1) is connected to the second end of described armature winding string (P), the reference electrode of described transistor (Q1) is connected to ground (GND).
15. driver according to claim 14 (100), it is characterized in that, described detecting unit (3), comprise at least two voltage detecting inputs (31, 32), at least two current detecting inputs (33, 34) and detect output (35), wherein, each is described first years old, second voltage detects input (31, 32) be connected to respectively described the first capacitor (C11, C12, C13, C14) and described cathode output end (A1, B1) intermediate node between, each described current detecting input (33, 34) respectively by the second resistance (R2, R3) be connected to described the first capacitor (C11, C12, C13, C14) and described cathode output end (A2, B2) intermediate node between, and described detection output (35) is connected to the input of described PWM controller (41).
16. a lighting device, is characterized in that, described lighting device has according to claim 10 to the described driver of any one (100) in 15.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210168093XA CN103427679A (en) | 2012-05-25 | 2012-05-25 | AC/DC constant-current conversion unit, driver and illuminating device having driver |
| DE201310209573 DE102013209573A1 (en) | 2012-05-25 | 2013-05-23 | Constant alternating current/direct current conversion unit for e.g. LED illumination device, has transformers that are spaced side by side such that magnetic fields of transformers are interconnected to compensate output current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210168093XA CN103427679A (en) | 2012-05-25 | 2012-05-25 | AC/DC constant-current conversion unit, driver and illuminating device having driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103427679A true CN103427679A (en) | 2013-12-04 |
Family
ID=49547205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210168093XA Pending CN103427679A (en) | 2012-05-25 | 2012-05-25 | AC/DC constant-current conversion unit, driver and illuminating device having driver |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103427679A (en) |
| DE (1) | DE102013209573A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104981049A (en) * | 2014-04-14 | 2015-10-14 | 欧司朗有限公司 | Light modulation driving circuit and illumination apparatus comprising the light modulation driving circuit |
| CN112042098A (en) * | 2018-04-16 | 2020-12-04 | 太阳食物有限公司 | Power converter for bioelectrochemical systems |
| CN114496464A (en) * | 2020-10-23 | 2022-05-13 | 台达电子工业股份有限公司 | Magnetic element |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109302775A (en) * | 2018-11-27 | 2019-02-01 | 四维生态科技（杭州）有限公司 | A kind of LED drive system of centrally connected power supply formula |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09224375A (en) * | 1996-02-16 | 1997-08-26 | Tohoku Ricoh Co Ltd | Push-pull type switching power supply device |
| CN201608941U (en) * | 2009-12-03 | 2010-10-13 | 国琏电子（上海）有限公司 | Driving device of light emitting diode (LED) |
| CN201887660U (en) * | 2010-12-24 | 2011-06-29 | 海信（山东）空调有限公司 | LPC switch power supply circuit and air conditioner with same |
-
2012
- 2012-05-25 CN CN201210168093XA patent/CN103427679A/en active Pending
-
2013
- 2013-05-23 DE DE201310209573 patent/DE102013209573A1/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09224375A (en) * | 1996-02-16 | 1997-08-26 | Tohoku Ricoh Co Ltd | Push-pull type switching power supply device |
| CN201608941U (en) * | 2009-12-03 | 2010-10-13 | 国琏电子（上海）有限公司 | Driving device of light emitting diode (LED) |
| CN201887660U (en) * | 2010-12-24 | 2011-06-29 | 海信（山东）空调有限公司 | LPC switch power supply circuit and air conditioner with same |
Non-Patent Citations (1)
| Title |
|---|
| 王小博等: "一种多路LED自动均流的反激式磁集成变换器方案", 《中国电源学会第十九届学术年会论文集》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104981049A (en) * | 2014-04-14 | 2015-10-14 | 欧司朗有限公司 | Light modulation driving circuit and illumination apparatus comprising the light modulation driving circuit |
| CN104981049B (en) * | 2014-04-14 | 2018-12-28 | 欧司朗有限公司 | Dimming driving circuit and lighting device including the dimming driving circuit |
| CN112042098A (en) * | 2018-04-16 | 2020-12-04 | 太阳食物有限公司 | Power converter for bioelectrochemical systems |
| CN114496464A (en) * | 2020-10-23 | 2022-05-13 | 台达电子工业股份有限公司 | Magnetic element |
| CN114496464B (en) * | 2020-10-23 | 2024-03-29 | 台达电子工业股份有限公司 | Inductor(s) |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102013209573A1 (en) | 2013-11-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8598807B2 (en) | Multi-channel constant current source and illumination source | |
| US7375607B2 (en) | DC transformer with an output inductance integrated on a magnetic core thereof and a DC/DC converter employing the same | |
| US7697306B2 (en) | DC/DC converter | |
| CN201266888Y (en) | DC converter integrated with magnetic component | |
| CN203554299U (en) | High-voltage input flyback switching power supply | |
| US20130285565A1 (en) | Multi-Channel Two-Stage Controllable Constant Current Source and Illumination Source | |
| CN205546049U (en) | Power supply circuit and LED lighting device | |
| CN202094803U (en) | Flyback power application circuit | |
| CN102791059B (en) | Current balancing circuit | |
| CN103427679A (en) | AC/DC constant-current conversion unit, driver and illuminating device having driver | |
| CN102142776A (en) | Switching power-supply apparatus | |
| CN102105010A (en) | LED drive circuit | |
| CN104135794A (en) | Driving circuit of LED (Light Emitting Diode), and display device | |
| CN204696909U (en) | A kind of IGBT module driving power | |
| CN205753994U (en) | Multiple-output electric power and electronic equipment | |
| US8901839B2 (en) | Two-switch flyback power supply device | |
| CN102458011A (en) | LED driving circuit and LED lamp | |
| CN101872674A (en) | Current-sharing transformer and applicable power supply circuit thereof | |
| CN102149243B (en) | A kind of inverse-excitation type magnetic integrated converter that can be used for LED multi-path and drive | |
| CN105917550A (en) | Electrical energy storage device having balance-imbalance converter | |
| CN103001498A (en) | Backlight-driven direct-current booster topology circuit | |
| CN202889723U (en) | LED primary constant current power supply output current adjusting control circuit | |
| CN204145294U (en) | Switching Power Supply buffer circuit | |
| CN201957301U (en) | Multi-channel light emitting diode (LED) current equalizing drive circuit | |
| CN201994169U (en) | Multifunctional transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131204 |