CN207117487U - Transformer and load driving circuit - Google Patents
Transformer and load driving circuit Download PDFInfo
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- CN207117487U CN207117487U CN201720574674.1U CN201720574674U CN207117487U CN 207117487 U CN207117487 U CN 207117487U CN 201720574674 U CN201720574674 U CN 201720574674U CN 207117487 U CN207117487 U CN 207117487U
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- 238000005859 coupling reaction Methods 0.000 claims description 7
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Abstract
The utility model discloses a transformer, which comprises a primary coil and a secondary coil which are coupled; the secondary coil is led out of N secondary windings with the same number of turns; the negative output end of the ith secondary winding is connected with the positive output end of the (i + 1) th secondary winding through a first jumper; the positive output end of the ith secondary winding is connected with the positive output end of the (i + 1) th secondary winding through a second jumper; the negative output end of the ith secondary winding is connected with the negative output end of the (i + 1) th secondary winding through a third jumper wire; the positive output end of the 1 st secondary winding and the negative output end of the Nth secondary winding are respectively used as a first output end and a second output end of the transformer; wherein i is any integer between 1 and N-1. A user can select the turn ratio of the transformer by setting the on-off states of the first jumper wire, the second jumper wire and the third jumper wire according to needs, so that the transformer is suitable for different application circuits, the use range of the transformer is enlarged, and the compatibility of the transformer is improved.
Description
Technical field
It the utility model is related to electronic circuit technology field, and in particular to a kind of transformer and load driving circuits.
Background technology
Transformer is the device for changing alternating voltage using the principle of electromagnetic induction, and main member is primary coil, secondary
Level coil and iron core (magnetic core).Because the primary coil of transformer and the number of turn of secondary coil are all fixed, i.e., turn ratio is
Fixed.But for different application circuits, it is necessary to turn ratio be different, thus need different transformer.It is same
The use range of transformer is too narrow, and compatibility is low.
Utility model content
The purpose of this utility model is to provide a kind of transformer and load driving circuits, and transformer turn ratio can basis
Need to adjust, increase the use range of transformer, compatibility is strong.
To solve above technical problem, on the one hand the utility model embodiment provides a kind of transformer, the transformer bag
Include the primary coil and secondary coil of coupling；The secondary coil draws N number of number of turn identical secondary windings；Wherein, N is even
Number；Each secondary windings has positive output end and negative output terminal；
The negative output terminal of i-th of secondary windings is connected with the positive output end of i+1 secondary windings by the first wire jumper；The
The positive output end of i secondary windings is connected with the positive output end of i+1 secondary windings by the second wire jumper；I-th level around
The negative output terminal of group is connected with the negative output terminal of i+1 secondary windings by the 3rd wire jumper；
The positive output end of 1st secondary windings is with the negative output terminal of n-th secondary windings respectively as the transformer
First output end and the second output end；Wherein, i is 1 to any integer between N-1.
Preferably, N is the even number more than or equal to 4；The positive output end and the 2j+1 secondary of 2j-1 secondary windings
The positive output end of winding is connected by the forth jump line；The negative output terminal of the 2j secondary windings and the 2j+2 secondary windings it is negative
Output end is connected by the fifth jump line；Wherein, j is 1 to any integer between N/2.
On the other hand the utility model embodiment provides a kind of load driving circuits, including the first metal-oxide-semiconductor, the 2nd MOS
Pipe, the first electric capacity, the second electric capacity, the 3rd electric capacity, the first inductance, output rectification module and change as claimed in claim 1 or 2
Depressor；
The grid of first metal-oxide-semiconductor is connected with first switch signal input part；The drain electrode of first metal-oxide-semiconductor and direct current
Power supply connects；The source electrode of first metal-oxide-semiconductor is connected with the drain electrode of second metal-oxide-semiconductor；The drain electrode of first metal-oxide-semiconductor and institute
The source electrode for stating the first metal-oxide-semiconductor passes through first capacitance connection；
The grid of second metal-oxide-semiconductor is connected with second switch signal input part；The source ground of second metal-oxide-semiconductor；
The drain electrode of second metal-oxide-semiconductor and the source electrode of second metal-oxide-semiconductor pass through second capacitance connection；
First inductance, the primary coil of the transformer, the 3rd electric capacity connect to form series via；The string
The first end on UNICOM road is connected to the source electrode of first metal-oxide-semiconductor, and the second end of the series via passes through the 3rd electric capacity
Ground connection；
First output end of the transformer and the second output end two with the output rectification module correspondingly
Input connects；The output end of the output rectification module is connected with load connection end.
Preferably, the load driving circuits also include first resistor and second resistance；The grid of first metal-oxide-semiconductor with
The source electrode of first metal-oxide-semiconductor is connected by the first resistor；The grid of second metal-oxide-semiconductor and second metal-oxide-semiconductor
Source electrode is connected by the second resistance.
Preferably, the output rectification module includes the first diode, the second diode, the 3rd diode and the four or two
Pole pipe；The positive pole of first diode is connected with the first output end of the transformer；The negative pole of first diode with
Load connection end connection；The negative pole of second diode is connected with the positive pole of first diode, and the described 2nd 2
The plus earth of pole pipe；The negative pole of 3rd diode is connected with the second output end of the transformer, the three or two pole
The plus earth of pipe；The negative pole of 4th diode is connected with the negative pole of the 3rd diode, the 4th diode
Positive pole is connected with the negative pole of first diode.
Preferably, the output rectification module also includes the 4th electric capacity；The negative pole of first diode passes through described
Four capacity earths.
Compared to prior art, the beneficial effects of the utility model are：The utility model embodiment provides a kind of change
Depressor, the transformer include the primary coil and secondary coil of coupling；It is secondary that the secondary coil draws N number of number of turn identical
Winding；Wherein, N is even number；Each secondary windings has positive output end and negative output terminal；The negative output terminal of i-th of secondary windings
It is connected with the positive output end of i+1 secondary windings by the first wire jumper；The positive output end of i-th of secondary windings and i+1
The positive output end of secondary windings is connected by the second wire jumper；The negative output terminal of i-th of secondary windings and i+1 secondary windings
Negative output terminal is connected by the 3rd wire jumper；The positive output end of 1st secondary windings is distinguished with the negative output terminal of n-th secondary windings
The first output end and the second output end as the transformer；Wherein, i is 1 to any integer between N-1.User can be with
As needed, the circle of the transformer is selected by setting the on off operating mode of the first wire jumper, the second wire jumper and the 3rd wire jumper
Number ratio, so as to adapt to different application circuits, increases the use range of transformer, improves the compatibility of transformer.
Meanwhile the utility model embodiment additionally provides a kind of load driving circuits using the transformer.
Brief description of the drawings
Fig. 1 is the structural representation for the transformer that the utility model first embodiment provides；
Fig. 2 is the structural representation for the transformer that the utility model second embodiment provides；
Fig. 3 is the structural representation for the transformer that the variant embodiment of the utility model second embodiment provides；
Fig. 4 is a kind of circuit diagram of one embodiment of load driving circuits provided by the utility model.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only part of the embodiment of the present utility model, rather than all
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
For the nonadjustable defect of turn ratio of the transformer of prior art, the utility model embodiment provides a kind of change
Depressor, including the transformer include the primary coil and secondary coil of coupling；The secondary coil draws N number of number of turn identical
Secondary windings；Wherein, N is even number；Each secondary windings has positive output end and negative output terminal；I-th secondary windings it is negative defeated
It is adjacent with the positive output end of i+1 secondary windings to go out end；
The negative output terminal of i-th of secondary windings is connected with the positive output end of i+1 secondary windings by the first wire jumper；The
The positive output end of i secondary windings is connected with the positive output end of i+1 secondary windings by the second wire jumper；I-th level around
The negative output terminal of group is connected with the negative output terminal of i+1 secondary windings by the 3rd wire jumper；
The positive output end of 1st secondary windings is with the negative output terminal of n-th secondary windings respectively as the transformer
First output end and the second output end；Wherein, i is 1 to any integer between N-1.
The effect of first wire jumper is to allow all secondary windings to be all together in series, second wire jumper and the described 3rd
The effect of wire jumper is to allow all secondary windings to be all together in parallel.
When the first all wire jumpers is in connection status, and the second all wire jumpers and the 3rd wire jumper are off
When, all secondary windings are all together in series, and now the turn ratio of the transformer is N*M2/M1.Wherein, M1 is the primary
The coil N0 number of turn, M2 are the number of turn of each secondary windings.
When the first all wire jumpers is off, and the second all wire jumpers and the 3rd wire jumper are in connection status
When, all secondary windings are all together in parallel, and now the turn ratio of the transformer is M2/M1.
Therefore user can be as needed, by setting the first wire jumper, the second wire jumper and the on off operating mode of the 3rd wire jumper
To select the turn ratio of the transformer.
It is specifically described individually below when N=2 and N=4 exemplified by the structure of transformer.
Referring to Fig. 1, it is the structural representation for the transformer that the utility model first embodiment provides.In Fig. 1, institute
Stating transformer includes the primary coil N0 and secondary coil of coupling；The secondary coil draws two secondary windings (N=2), bag
Include number of turn identical the first secondary windings N1 and second subprime winding N2.
The positive output end that the negative output terminal of the first secondary windings N1 passes through the wire jumper J1 and second subprime winding N2
Connection；
The positive output end that the positive output end of the first secondary windings N1 passes through the wire jumper J2 and second subprime winding N2
Connection；
The negative output terminal that the negative output terminal of the first secondary windings N1 passes through the wire jumper J3 and second subprime winding N2
Connection.
It can be seen that in Fig. 1 embodiments, J1 belongs to the first above-mentioned wire jumper, and J2 belongs to the second above-mentioned wire jumper, and J3 belongs to
The 3rd wire jumper stated.
As shown in Fig. 2 it is the structural representation for the transformer that the utility model second embodiment provides.In fig. 2, institute
Stating transformer includes the primary coil N0 and secondary coil of coupling；The secondary coil draws four secondary windings (N=4), bag
Include the first secondary windings N1, second subprime winding N2, third time level winding N3 and the 4th secondary windings N4.Four secondary
The number of turn all same of winding.
The positive output end that the negative output terminal of the first secondary windings N1 passes through the wire jumper J1 and second subprime winding N2
Connection；The negative output terminal of the second subprime winding N2 is connected by wire jumper J2 and third time level winding N3 positive output end
Connect；The negative output terminal of the third time level winding N3 is connected by wire jumper J3 with the positive output end of the 4th secondary windings N4；
The positive output end that the positive output end of the first secondary windings N1 passes through the wire jumper J4 and second subprime winding N2
Connection；The positive output end of the second subprime winding N2 is connected by wire jumper J5 and third time level winding N3 positive output end
Connect；The positive output end of the third time level winding N3 is connected by wire jumper J6 with the positive output end of the 4th secondary windings N4；
The negative output terminal that the negative output terminal of the first secondary windings N1 passes through the wire jumper J7 and second subprime winding N2
Connection；The negative output terminal of the second subprime winding N2 is connected by wire jumper J8 and third time level winding N3 negative output terminal
Connect；The negative output terminal of the third time level winding N3 is connected by wire jumper J9 with the negative output terminal of the 4th secondary windings N4；
It can be seen that J1, J2, J3 belong to the first above-mentioned wire jumper, J4, J5, J6 belong to the second above-mentioned wire jumper, J7, J8, J9 category
In the 3rd above-mentioned wire jumper.
The structure of transformer provided by the utility model is specifically illustrated above by N=2 and N=4 two embodiments,
But the utility model is not limited to N=2 and N=4, can be carried out for all scenario that N is non-zero even number.
As preferred scheme, N is the even number more than or equal to 4；The positive output end and of 2j-1 secondary windings
The positive output end of 2j+1 secondary windings is connected by the forth jump line；The negative output terminal and 2j+2 of 2j secondary windings time
The negative output terminal of level winding is connected by the fifth jump line；Wherein, j is 1 to any integer between N/2.
The effect of the forth jump line and the fifth jump line is to coordinate first wire jumper, by two adjacent secondary around
Group carries out parallel connection again after being together in series two-by-two.Now the turn ratio of the transformer is 2M2/M1.
Therefore, in preferred scheme, the turn ratio of the transformer can be N*M2/M1, M2/M1,2M2/M1, make
More demands must be met.
As shown in figure 3, the structural representation for the transformer that the variant embodiment that it is the utility model second embodiment provides
Figure.In the embodiment shown in fig. 3, the transformer is except including J1~J9 in embodiment illustrated in fig. 2, still further comprising
J10 and J11.
Wherein, the first secondary windings N1 positive output end is connected by wire jumper J10 and third time level winding N3 positive output end
Connect, second subprime winding N2 negative output terminal is connected by wire jumper J11 with third time level winding N3 negative output terminal.
It can be seen that J10 belongs to above-mentioned the forth jump line, J11 belongs to above-mentioned the fifth jump line.
When J1, J3, J10 and J11 are in connection status, and J2, J4, J5, J6, J7, J8 and J9 are off, institute
The first secondary windings N1 is stated to connect to form the first series connection winding with the second subprime winding N2, the third time level winding N3 with
The 4th secondary windings N4 connects to form the second series connection winding, and the first series connection winding connects winding simultaneously with described second
Connection.
The utility model additionally provides one embodiment of the application circuit of above-mentioned transformer.As shown in figure 4, it is this reality
With a kind of circuit diagram of one embodiment of load driving circuits of new offer.
The load driving circuits, including the first metal-oxide-semiconductor M1, the second metal-oxide-semiconductor M2, the first electric capacity C1, the second electric capacity C2,
Three electric capacity C3, the first inductance L1, output rectification module and transformer as shown in Figure 1；
The grid of the first metal-oxide-semiconductor M1 is connected with first switch signal input part Ctrl1；The first metal-oxide-semiconductor M1's
Drain electrode is connected with dc source Vdd；The source electrode of the first metal-oxide-semiconductor M1 is connected with the drain electrode of the second metal-oxide-semiconductor M2；Described
One metal-oxide-semiconductor M1 drain electrode is connected with the source electrode of the first metal-oxide-semiconductor M1 by the first electric capacity C1；
The grid of the second metal-oxide-semiconductor M2 is connected with second switch signal input part Ctrl2；The second metal-oxide-semiconductor M2's
Source ground；Second metal-oxide-semiconductor M2 drain electrode is connected with the source electrode of the second metal-oxide-semiconductor M2 by the second electric capacity C2；
The first inductance L1, the primary coil N0 of the transformer, the 3rd electric capacity C3 connect to form series via；
The first end of the series via is connected to the source electrode of the first metal-oxide-semiconductor M1, and the second end of the series via passes through described
3rd electric capacity C3 is grounded；
First output end of the transformer and the second output end two with the output rectification module correspondingly
Input connects；The output end of the output rectification module is connected with load connection end.
Wherein, the first metal-oxide-semiconductor M1, the second metal-oxide-semiconductor M2, the first inductance L1, the transformer and the institute
State the 3rd electric capacity C3 and form LLC resonance circuits, by the first switch for adjusting the first switch signal input part Ctrl1 inputs
The frequency of signal and the second switch signal of second switch signal input part Ctrl2 inputs adjusts the transformer output
Voltage.The output rectification module is used to the voltage that the transformer exports being converted to direct current by rectification, for load
Power supply.In the present embodiment, the load is LED, and the load connection end and LED positive pole connect, and the negative pole of the LED connects
Ground.
Preferably, the load driving circuits also include first resistor R1 and second resistance R2；The first metal-oxide-semiconductor M1's
Grid is connected with the source electrode of the first metal-oxide-semiconductor M1 by the first resistor R1；The grid of the second metal-oxide-semiconductor M2 with it is described
Second metal-oxide-semiconductor M2 source electrode passes through the second resistance R2 connections.The first resistor R1 makees respectively with the second resistance R2
For the first metal-oxide-semiconductor M1 and the second metal-oxide-semiconductor M2 protective resistance, maloperation is prevented.
Preferably, it is described output rectification module include the first diode D1, the second diode D2, the 3rd diode D3 and
4th diode D4；The positive pole of the first diode D1 is connected with the first output end of the transformer；One or two pole
Pipe D1 negative pole is connected with the load connection end；The positive pole of the negative pole of the second diode D2 and the first diode D1
Connection, the plus earth of the second diode D2；Second output of the negative pole of the 3rd diode D3 and the transformer
End connection, the plus earth of the 3rd diode D3；The negative pole of the 4th diode D4 is with the 3rd diode D3's
Negative pole is connected, and the positive pole of the 4th diode D4 is connected with the negative pole of the first diode D1.
It is whole that the first diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4 form all-wave
Flow bridge.
Preferably, the output rectification module also includes the 4th electric capacity；The negative pole of the first diode D1 passes through described
4th capacity earth.
For the load driving circuits, its gain
Wherein, n is the turn ratio of the transformer.
Therefore, the gain of the load driving circuits can be changed by adjusting the turn ratio of the transformer.
Compared to prior art, the beneficial effect of the utility model embodiment is：The utility model embodiment provides
A kind of transformer, the transformer include the primary coil and secondary coil of coupling；It is identical that the secondary coil draws N number of number of turn
Secondary windings；Wherein, N is even number；Each secondary windings has positive output end and negative output terminal；I-th secondary windings it is negative
Output end is connected with the positive output end of i+1 secondary windings by the first wire jumper；The positive output end and of i-th of secondary windings
The positive output end of i+1 secondary windings is connected by the second wire jumper；The negative output terminal of i-th of secondary windings is secondary with i+1
The negative output terminal of winding is connected by the 3rd wire jumper；The positive output end of 1st secondary windings and the negative output of n-th secondary windings
Hold the first output end and the second output end respectively as the transformer；Wherein, i is 1 to any integer between N-1.With
Family can be as needed, and the transformation is selected by setting the on off operating mode of the first wire jumper, the second wire jumper and the 3rd wire jumper
The turn ratio of device, so as to adapt to different application circuits, the use range of transformer is increased, improves the compatibility of transformer
Property.Meanwhile the utility model embodiment additionally provides a kind of load driving circuits using the transformer.
Described above is preferred embodiment of the present utility model, it is noted that for the ordinary skill of the art
For personnel, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these are improved and profit
Decorations are also considered as the scope of protection of the utility model.
Claims (6)
1. a kind of transformer, it is characterised in that the transformer includes the primary coil and secondary coil of coupling；The secondary wire
Circle draws N number of number of turn identical secondary windings；Wherein, N is even number；Each secondary windings has positive output end and negative output terminal；
The negative output terminal of i-th of secondary windings is connected with the positive output end of i+1 secondary windings by the first wire jumper；I-th
The positive output end of secondary windings is connected with the positive output end of i+1 secondary windings by the second wire jumper；I-th secondary windings
Negative output terminal is connected with the negative output terminal of i+1 secondary windings by the 3rd wire jumper；
The positive output end of 1st secondary windings is with the negative output terminal of n-th secondary windings respectively as the first of the transformer
Output end and the second output end；Wherein, i is 1 to any integer between N-1.
2. transformer as claimed in claim 1, it is characterised in that N is the even number more than or equal to 4；The 2j-1 it is secondary around
The positive output end of group is connected with the positive output end of the 2j+1 secondary windings by the forth jump line；The 2j secondary windings it is negative defeated
Go out end to be connected by the fifth jump line with the negative output terminal of the 2j+2 secondary windings；Wherein, j is 1 to any whole between N/2
Number.
A kind of 3. load driving circuits, it is characterised in that including the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, the first electric capacity, the second electric capacity,
3rd electric capacity, the first inductance, output rectification module and transformer as claimed in claim 1 or 2；
The grid of first metal-oxide-semiconductor is connected with first switch signal input part；The drain electrode of first metal-oxide-semiconductor and dc source
Connection；The source electrode of first metal-oxide-semiconductor is connected with the drain electrode of second metal-oxide-semiconductor；The drain electrode of first metal-oxide-semiconductor and described the
The source electrode of one metal-oxide-semiconductor passes through first capacitance connection；
The grid of second metal-oxide-semiconductor is connected with second switch signal input part；The source ground of second metal-oxide-semiconductor；Second
The drain electrode of metal-oxide-semiconductor and the source electrode of second metal-oxide-semiconductor pass through second capacitance connection；
First inductance, the primary coil of the transformer, the 3rd electric capacity connect to form series via；The series connection is logical
The first end on road is connected to the source electrode of first metal-oxide-semiconductor, and the second end of the series via passes through the 3rd capacity earth；
First output end of the transformer and two inputs with the output rectification module correspondingly of the second output end
End connection；The output end of the output rectification module is connected with load connection end.
4. load driving circuits as claimed in claim 3, it is characterised in that the load driving circuits also include first resistor
With second resistance；The grid of first metal-oxide-semiconductor is connected with the source electrode of first metal-oxide-semiconductor by the first resistor；It is described
The grid of second metal-oxide-semiconductor is connected with the source electrode of second metal-oxide-semiconductor by the second resistance.
5. load driving circuits as claimed in claim 3, it is characterised in that the output rectification module includes the one or two pole
Pipe, the second diode, the 3rd diode and the 4th diode；The positive pole of first diode and the first of the transformer
Output end connects；The negative pole of first diode is connected with the load connection end；The negative pole of second diode and institute
State the positive pole connection of the first diode, the plus earth of second diode；The negative pole of 3rd diode and the change
The second output end connection of depressor, the plus earth of the 3rd diode；The negative pole and the described 3rd of 4th diode
The negative pole connection of diode, the positive pole of the 4th diode are connected with the negative pole of first diode.
6. load driving circuits as claimed in claim 5, it is characterised in that the output rectification module also includes the 4th electricity
Hold；The negative pole of first diode passes through the 4th capacity earth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720574674.1U CN207117487U (en) | 2017-05-22 | 2017-05-22 | Transformer and load driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720574674.1U CN207117487U (en) | 2017-05-22 | 2017-05-22 | Transformer and load driving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207117487U true CN207117487U (en) | 2018-03-16 |
Family
ID=61594659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720574674.1U Active CN207117487U (en) | 2017-05-22 | 2017-05-22 | Transformer and load driving circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207117487U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108447651A (en) * | 2018-06-08 | 2018-08-24 | 南京国博电子有限公司 | A kind of integrated variable turning ratio transformer of on piece |
-
2017
- 2017-05-22 CN CN201720574674.1U patent/CN207117487U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108447651A (en) * | 2018-06-08 | 2018-08-24 | 南京国博电子有限公司 | A kind of integrated variable turning ratio transformer of on piece |
| CN108447651B (en) * | 2018-06-08 | 2023-07-11 | 南京国博电子股份有限公司 | On-chip integrated variable turns ratio transformer |
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