CN206237644U - A kind of flyback power supply for LED lamp - Google Patents
A kind of flyback power supply for LED lamp Download PDFInfo
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- CN206237644U CN206237644U CN201621278177.9U CN201621278177U CN206237644U CN 206237644 U CN206237644 U CN 206237644U CN 201621278177 U CN201621278177 U CN 201621278177U CN 206237644 U CN206237644 U CN 206237644U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Circuit Arrangement For Electric Light Sources In General (AREA)
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Abstract
A kind of flyback power supply for LED lamp, it includes at least two transformers, a switch, and load.Each transformer includes a primary and a secondary.It is described primary including a positive input terminal and a negative input end.It is described secondary including a positive output end and a negative output terminal.The positive input terminal that the primary positive input terminal of a transformer at least two transformer is primary with other is connected, the negative output terminal negative output terminal primary with other is connected, the secondary positive output end connection load of the transformer, the secondary positive-negative output end positive and negative connection successively of negative output terminal and other transformers.The flyback power supply replaces an independent single transformer using at least two first, second transformers, the size on certain direction can be reduced, such that it is able to while using existing magnetic core with skeleton, reduce whole product size in a certain direction, and then the installation requirements of user are adapted to, increase Consumer's Experience effect.
Description
Technical field
The utility model is related to a kind of applied power source field of lamp lighting, particularly a kind of flyback for LED lamp
Formula power supply.
Background technology
In general daily life, all visible various lighting apparatus everywhere, for example, fluorescent lamp, street lamp, desk lamp, art
Lamp etc..In above-mentioned lighting apparatus, traditionally major part is using osram lamp as illuminating source.In recent years, due to science and technology
Make rapid progress, by the use of light emitting diode (LED) as illuminating source.Notably, in addition to lighting apparatus, for general traffic number
Will, billboard, car light etc., are also changed to use light emitting diode as illuminating source.Using light emitting diode as luminous light
Source, it is advantageous in that power saving, and brightness is bigger, therefore in the upper gradually generalization of use.
But LED lamp is used as a kind of dc power losser, when being powered for it using civil power, generally typically will be by
The civil power is converted to the direct current that suitable LED lamp is used, or constant pressure, or constant current.In the prior art, by civil power
The power component that wheel is changed to the electric current that suitable LED lamp is used can be transformer.LED lamp power supply using transformer is usual
Referred to as flyback power supply, because must have feedback circuit in the power supply.Then in actual use, due to transformer
Volume, i.e. the limitation of length, width and height so that the power supply of whole flyback power supply size in a certain direction is very big, causes difficulty
To be installed in specific installation environment, negative impact is caused to Consumer's Experience.
Utility model content
In view of this, the utility model provide it is a kind of can reduce the size on certain direction of transformer for LED
The flyback power supply of light fixture, to solve above-mentioned technical problem.
A kind of flyback power supply for LED lamp, it includes at least two transformers, a control described at least two
A switch for break-make in transformer, and the load for being electrically connected at the output end of at least two transformer.It is each
Individual transformer includes the secondary of a primary and and the primary electrical couplings.It is described primary including a positive input terminal and one
Individual negative input end.It is described secondary including a positive output end and a negative output terminal.One at least two transformer
The positive input terminal that the primary positive input terminal of transformer is primary with other is connected, and negative output terminal connects with other primary negative output terminals
Connect, the secondary positive output end connection load of the transformer, the secondary positive-negative output end of negative output terminal and other transformers according to
Secondary positive and negative connection.Or all primary positive and negative input positive and negative connections successively of at least two transformer, all secondary
Positive output end connection load, negative output terminal ground connection, when the primary positive input terminal positive input terminal primary with other is connected, often
One negative output terminal is electrically connected with switch, in primary positive and negative import and export end positive and negative connection successively, only one negative output
End is electrically connected with switch.
Further, load, negative output terminal ground connection are connected in all secondary positive output ends of at least two transformer
When, also include a diode, the positive pole and positive output of the diode respectively between the secondary positive output end and load
End connection, negative pole is connected with load.
Further, when a positive output end for secondary at least two transformer is connected with load, this is just
Also include a diode between output end and load, the positive pole of the diode is connected with positive output end, negative pole connects with load
Connect.
Further, the switch is a metal-oxide-semiconductor, and the drain electrode of the metal-oxide-semiconductor is connected with primary negative input end.
Further, the specifications parameter of each at least two transformer is the same.
Further, the primary positive input terminal of a transformer at least two transformer is primary with other
Positive input terminal connection, the negative output terminal negative output terminal primary with other be connected, and the secondary positive output end of the transformer is connected
Load, the secondary positive-negative output end of negative output terminal and other transformers successively positive and negative connection when, at least two transformer
The single transformer with identical output parameter independent compared to one, peak point current and list when each transformer charges
The peak point current of one transformer is identical, the discharge current phase of the discharge current of each transformer and single transformer during electric discharge
Together.
Further, the primary wire circle of each transformer of at least two transformer is single transformer
Primary wire circle half, and line footpath is identical, secondary wire circle and the single transformer of each transformer
Secondary wire circle is identical.
Further, in all primary positive and negative input positive and negative connections successively of at least two transformer, own
Secondary positive output end connection load, negative output terminal ground connection is connected in the primary positive input terminal positive input terminal primary with other
When, each negative output terminal is electrically connected with switch, in primary positive and negative import and export end positive and negative connection successively, only one
When negative output terminal is electrically connected with switch, at least two transformer it is independent compared to one with identical output parameter
Single transformer, charging current when each transformer charges is the half of the charging current of single transformer, every during electric discharge
The discharge current of one transformer is the half of single transformer.
Further, the primary wire circle of each transformer of at least two transformer and single transformer
Primary wire circle it is identical, the secondary wire circle of each transformer is the secondary wire circle of single transformer
Half.
Compared with prior art, the flyback power supply replaces one using at least two first, second transformers solely
Vertical single transformer, can reduce the size on certain direction, such that it is able to while using existing magnetic core and skeleton,
Reduce whole product size in a certain direction, and then be adapted to the installation requirements of user, increase Consumer's Experience effect.
Brief description of the drawings
Below in conjunction with Description of Drawings embodiment of the present utility model, wherein：
A kind of one of circuit diagram of flyback power supply for LED lamp that Fig. 1 is provided for the utility model.
The two of the circuit diagram of a kind of flyback power supply for LED lamp that Fig. 2 is provided for the utility model.
Specific embodiment
Specific embodiment of the utility model is further elaborated below based on accompanying drawing.It should be appreciated that
Explanation to the utility model embodiment herein is not used to limit protection domain of the present utility model.
Fig. 1 to Fig. 2 is referred to, a kind of electricity of its flyback power supply 100 for LED lamp provided for the utility model
Lu Tu.The flyback power supply 100 for LED lamp includes at least first, second transformer 10,20, and a control is described
A switch for break-make 30 in first, second transformer 10,20, and be electrically connected at first, second transformer 10,
The load 40 of 20 output end.May be it is contemplated that used as the power supply for LED lamp, the flyback power supply 100 be also affirmed
Including some other functional module, be such as electrically connected at the input of first, second transformer 10,20 current rectifying and wave filtering circuit and
Feedback control chip circuit, and be electrically connected at the feedback circuit of output end of first, second transformer 10,20 etc., this
Technology known by those skilled in the art, is no longer described in detail in the utility model.
The flyback power supply 100 at least includes first, second transformer 10,20, and implying that can include three or more
It is many.In the utility model creation, the flyback power supply 100 completes power output conversion using multiple transformers, mainly
It is, in order to solve the restricted problem in size, certainly, to be converted according to the power output to be completed and required, it is also possible to redesigned
The magnetic core and skeleton of a transformer for adapting to the space requirement, so as to complete above-mentioned defeated using only a transformer
Go out power conversion requirement.But, in actual use, the power output conversion of the flyback power supply 100 requires that species is a lot,
Can not possibly each requirement all design a new magnetic core and skeleton, it is very high that this not only results in cost, and causes very big
Waste, be unfavorable for environmental protection.Therefore, the purpose that the utility model is created just is available with existing magnetic core and skeleton, then
The requirement that above-mentioned power output is converted is completed by the transformer that the existing magnetic core and skeleton are made using multiple, you can with
The restricted problem in size is solved, waste, environmental protection can be reduced again.In the present embodiment, the flyback power supply 100 is only
Illustrate that the utility model is created including first, second transformer 10,20.
First, second transformer 10,20 is of the same size, structure, specifications parameter such as magnetic core and skeleton, primary
With secondary wire circle, line footpath size etc. parameter.Those skilled in the art are all known, and each transformer is wrapped
Include a primary with one with the secondary of the primary electrical couplings, and be arranged on two positive and negative inputs in primary, if
Put the positive and negative output end in secondary.But in order to illustrate the utility model, it is desired nonetheless to be described.Described first becomes
Depressor 10 includes one first primary 11 and first level 12.Described first primary 11 includes first positive input terminal
111 and first negative input end 112, first level 12 includes the first positive output end 121 and the first negative output terminal 122.
Second transformer 20 includes one second primary 21 and a second subprime 22.Described second primary 21 includes one first
Positive input terminal 211 and second negative input end 212.The second subprime 22 includes first positive output end 221 and one
Second negative output terminal 222.
First, second transformer 10,20 can have two kinds of connection methods come according to power output change requirement come
Reach its purpose.First method is that the first positive input terminal 111 of the first primary 11 of first transformer 10 is that power supply is defeated
Enter end and be connected with the second positive input terminal 211 of the second primary 21, the first negative input end 112 is negative defeated with the second of the second primary 22
Enter the connection of end 212 and while be electrically connected with switch 13, the first positive output end 121 of first level 11 of first transformer 10
It is electrically connected with load 14, first time the second negative output terminal 122 of level 11 is electrical with the second positive output end 221 of the second primary 22
Connection.According to this kind of connection method, when with multiple transformers, primary all positive input terminals of the plurality of transformer
Link together, the negative input end links together, while the secondary positive output end connection of the plurality of transformer is negative
Carry, negative output terminal connects a secondary positive output end of another transformer, its negative output terminal connection still further change
The secondary positive output end of depressor, the rest may be inferred, i.e. positive and negative connection successively, and the negative output terminal connection of last transformer is described
Switch 13.
In the first method shown in Fig. 1, the first positive output of first level 12 in first transformer 10
When end 121 is connected with load 14, a diode D1, two pole are also included between first positive output end 121 and load 14
The positive pole of pipe D1 is connected with the first positive output end 121, and negative pole is connected with load 14.
In addition, in the first method, when size is unrestricted, can also come using only an independent transformer
Instead of first, second transformer 10,20.One independent transformer and first, second transformer 10,20 phases
Than with identical output parameter, such as power output.First, second transformer 10,20 is compared to an independent list
One transformer, peak point current that each transformer of first, second transformer 10,20 charges and the single transformer
Peak point current is identical, the discharge current and the single transformer of each transformer of first, second transformer 10,20 during electric discharge
Discharge current it is identical.The primary wire circle of each transformer of first, second transformer 10,20 is single simultaneously
The half of the primary coil of transformer, and line footpath is identical, and the secondary wire circle of each transformer and single transformation
The secondary wire circle of device is identical, and line footpath can reduce.
Second connection method to first, second transformer 10,20 below is illustrated.
In second connection method shown in Fig. 2, all primary 11, the 21 of first, second transformer 10,20
First positive input terminal 111 is power input, and the first negative input end 112, the second positive input terminal 211 are connected, the second negative input end
212 are electrically connected with switch 13.All secondary 12,22 connection of first, second positive output end 121,221 load 14, first, the
Two negative output terminal 122,222 is grounded.According to this second connection method, when the flyback power supply 100 includes multiple described the
First, during the second transformer 10,20, the first positive input terminal 111 of the first primary 11 of first transformer 10 is power input
End, then remaining positive and negative input positive and negative connection successively, last and only one negative input end is electrically connected with switch 13.
All secondary positive output ends of the multiple first, second transformer 10,20 all load connection, and negative output terminal is all grounded.
In the second method, first, second positive output end 121,221 of first, second level 12,22 with it is negative
Also include a diode D1, i.e., two diode D1 between carrying 14 respectively.The positive pole and difference of this two diode D1
It is connected with first, second positive output end 121,221, negative pole is connected with load 14.
Such as in second connection method, when size is unrestricted, it is also possible to using only an independent single transformation
Device replaces first, second transformer 10,20 in second connection method.First, second transformer 10,20 it is every
Charging current when one transformer charges is the half of the charging current of the single transformer, and each transformer puts during electric discharge
Electric current is also the half of single transformer.Meanwhile, first, second transformer 10,20 is described compared with single transformer
The primary wire circle of each transformer of first, second transformer 10,20 and the primary coil turn of single transformer
Number is identical, and the secondary wire circle of each transformer is the half of the secondary wire circle of single transformer.
The switch 13 can be metal-oxide-semiconductor, one in the drain electrode of the metal-oxide-semiconductor and first, second transformer 10,20
Primary negative input end connection, in the present embodiment, the drain electrode of the metal-oxide-semiconductor and the second of the second primary 22 of the second transformer 20
Negative input end 222 is connected.The source ground of the metal-oxide-semiconductor, grid and other functions module, such as feedback control chip circuit electrically connect
Connect, to control the break-make of the metal-oxide-semiconductor.
The load 14 is LED lamp, and it can include that multiple LED chips are connected in series or in parallel, and it is used as existing skill
Art, will not be repeated here.
Compared with prior art, the flyback power supply 100 uses at least two first, second transformers 10,20 generations
For an independent single transformer, the size on certain direction can be reduced, such that it is able to utilize existing magnetic core and bone
While frame, the whole product of reduction size in a certain direction, and then the installation requirements of user are adapted to, increase user's body
Test effect.
Preferred embodiment of the present utility model is these are only, is not used to limit to protection domain of the present utility model, it is any
Modification, equivalent or improvement in the utility model spirit etc., all cover in right of the present utility model.
Claims (9)
1. a kind of flyback power supply for LED lamp, it is characterised in that：The flyback power supply includes at least first, second
Transformer, a switch for break-make in control at least first, second transformer, and described in being electrically connected at extremely
The load of the output end of few first, second transformer, first, second transformer includes one first, second primary respectively
With one with first, second level of the first, second primary electrical couplings, first, second primary includes one respectively
First, second positive input terminal and first, second negative input end, first, second level include respectively one first, the
At the beginning of two positive output ends and first, second negative output terminal, primary first positive input terminal and second of first transformer
The positive input terminal connection of level, the first negative output terminal is connected with the second negative output terminal of the second primary, the first time of the first transformer
The first positive output end connection load of level, first time the first negative output terminal of level is connected with the second positive output end of second subprime；
Or the first, second positive and negative input positive and negative connection successively of all first, second primary of first, second transformer,
The first, second positive output end connection load of all first, second levels, first, second negative output terminal ground connection is primary first
The first positive input terminal when being connected with the second positive input terminal of the second primary, each negative output terminal of first, second primary
It is electrically connected with switch, first, second positive output end, first, second negative output terminal in first, second primary positive and negative company successively
When connecing, only one first or the second negative output terminal and switch electric connection.
2. the flyback power supply of LED lamp is used for as claimed in claim 1, it is characterised in that：Described at least first, second
The first, second positive output end connection load of all first, second levels of transformer, when first, second negative output terminal is grounded,
Also include a diode, the diode respectively between first, second positive output end of first, second level and load
Positive pole be connected with first, second positive output end, negative pole with load be connected.
3. the flyback power supply of LED lamp is used for as claimed in claim 1, it is characterised in that：The of first level
When one positive output end is connected with load, a diode is also included between first positive output end and load, the diode
Positive pole is connected with the first positive output end, and negative pole is connected with load.
4. the flyback power supply of LED lamp is used for as claimed in claim 1, it is characterised in that：The switch is a MOS
Pipe, the drain electrode of the metal-oxide-semiconductor is connected with the second negative input end of the second primary.
5. the flyback power supply of LED lamp is used for as claimed in claim 1, it is characterised in that：At least two transformer
In the specifications parameter of each be the same.
6. the flyback power supply of LED lamp is used for as claimed in claim 1, it is characterised in that：In first transformer
The first primary positive input terminal is connected with the positive input terminal of the second primary, the second negative output of the first negative output terminal and the second primary
End connection, the first positive output end connection load of first level of the first transformer, the first negative output terminal of first level and the
When second positive output end of secondary stage is connected, at least first, second transformer it is independent compared to one with identical defeated
Go out the single transformer of parameter, peak point current when first, second transformer charges is identical with the peak point current of single transformer,
The discharge current of first, second transformer is identical with the discharge current of single transformer during electric discharge.
7. the flyback power supply of LED lamp is used for as claimed in claim 6, it is characterised in that：First, second transformer
First, second primary wire circle be single transformer primary wire circle half, and line footpath is identical, first,
The secondary wire circle of the secondary wire circle of the second transformer and single transformer is identical.
8. the flyback power supply of LED lamp is used for as claimed in claim 1, it is characterised in that：In first, second transformation
The first, second positive and negative input positive and negative connection successively of all first, second primary of device, the of all first, second levels
First, the second positive output end connection load, when first, second negative output terminal is grounded, first, second transformer is compared to one
The independent single transformer with identical output parameter, charging current when first, second transformer charges is single transformation
The half of the charging current of device, the discharge current of first, second transformer is the half of single transformer during electric discharge.
9. the flyback power supply of LED lamp is used for as claimed in claim 8, it is characterised in that：First, second transformer
First, second primary wire circle and single transformer primary wire circle it is identical, the of first, second transformer
First, the wire circle of second subprime is the half of the secondary wire circle of single transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621278177.9U CN206237644U (en) | 2016-11-23 | 2016-11-23 | A kind of flyback power supply for LED lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621278177.9U CN206237644U (en) | 2016-11-23 | 2016-11-23 | A kind of flyback power supply for LED lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206237644U true CN206237644U (en) | 2017-06-09 |
Family
ID=58981246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621278177.9U Active CN206237644U (en) | 2016-11-23 | 2016-11-23 | A kind of flyback power supply for LED lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206237644U (en) |
-
2016
- 2016-11-23 CN CN201621278177.9U patent/CN206237644U/en active Active
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