CN200987126Y - Transformation switching circuit for power supply apparatus - Google Patents
Transformation switching circuit for power supply apparatus Download PDFInfo
- Publication number
- CN200987126Y CN200987126Y CN 200620157726 CN200620157726U CN200987126Y CN 200987126 Y CN200987126 Y CN 200987126Y CN 200620157726 CN200620157726 CN 200620157726 CN 200620157726 U CN200620157726 U CN 200620157726U CN 200987126 Y CN200987126 Y CN 200987126Y
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- current potential
- circuit
- power
- power supply
- supply unit
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Abstract
A variable voltage converting circuit of power supply unit comprises a primary winding coil, a secondary winding coil and a secondary rectifying circuit, wherein the voltage regulation is completed based on the turns ratio between primary winding coil and the secondary winding coil, a first potential DC power is obtained with the aid of the secondary rectifying circuit; a N+1 group of potential regulating circuit is connected in parallel with the first potential DC power; each group of potential regulating circuit is provided to convert the first potential DC power into a different second potential DC power of the N+1 group, wherein, N is more than or equal to1; the utility model can provide a multi-potential DC power with more flexible and efficient power output.
Description
Technical field
The utility model relates to a kind of transformation change-over circuit, especially a kind of transformation change-over circuit of power supply unit.
Background technology
In the known power source supply, if need output+12V, the different DC potential electric power of+5V and+3.3V, then the secondary side in power supply unit transformation change-over circuit is provided with three groups of coils, the single DC potential electric power of each coil independently supplying, but the design of this kind power supply unit is excessive because of three groups of shared gross spaces of coil, therefore can cause the inconvenience in the use.
For this reason, a kind of power supply unit transformation change-over circuit design is arranged on the market in addition, see also shown in Fig. 1～3, be respectively known forward type (Forward), two forward types (Dual-Forward), the power supply unit of semibridge system (Half-Bridge), it is provided with two groups of secondary winding circles 5,6, directly supply+12V current potential output of secondary winding circle 5, and another secondary winding circle 6 with potential difference less+5V merges by single secondary winding coil 5 supply electric power with the output of+3.3V current potential, wherein ,+3.3V current potential output be by secondary winding circle 5 utilize possess magamp (Magnetic Amplifier) feedback controller 71 control circuit 7 and export+3.3V DC potential electric power.
Yet, the design of above-mentioned transformation change-over circuit+the 12V output power is subject to+the 5V output power, so cause its electrical efficiency relatively poor, and weight occurs in+12V voltage output end and carries when changing, interference+5V is reached+the electric power signal of 3.3V voltage output end.In addition, if+3.3V output heavy duty appears and in+12V with+when underloading appears in the 5V output, because work period this moment (Duty Cycle) is too small, the output power of influence+3.3V output is occurred causing power supply unit not work unusually because of compatibility issue.
The power supply unit that has is provided with dummy load (Dummy Load) or gets the interference of circuit to prevent that weight carries that an accurate signal is corrected output power again in output for preventing above-mentioned situation.Yet above-mentioned output is set up manufacturing cost that structure will increase power supply unit and is made the time, therefore, how to provide a kind of with easy structure and can prevent that output influences output power because of weight carries power supply unit from be the big problem that people study.
The utility model content
Main purpose of the present utility model, be to provide a kind of power supply unit transformation change-over circuit that has elasticity supply of electric power and electrical efficiency concurrently, the secondary winding coil and the secondary commutation circuit that are the utilization output first current potential direct current power are keeping high electrical efficiency, and utilization current potential adjustment circuit is exported the second current potential direct current power to reach the effect of elasticity supply of electric power.
For reaching above-mentioned purpose, the utility model provides a kind of transformation change-over circuit of power supply unit, and this transformation change-over circuit includes: a primary winding coil; A level winding coil and a level rectification circuit, be by the secondary winding coil relatively this primary winding coil be one first current potential direct current power with a turn ratio transformation and through this secondary commutation circuit conversion; N+1 organizes current potential and adjusts circuit, is to be connected in parallel in this first current potential direct current power, and it is that benchmark electric power and commentaries on classics pressure are organized the second current potential direct current power, this N 〉=1 for the N+1 of different current potential with this first current potential direct current power that this every group of current potential adjusted circuit.
Description of drawings
Fig. 1 is the circuit diagram of the known forward type power supply unit of the utility model;
Fig. 2 is the circuit diagram of known pair of forward type power supply unit of the utility model;
Fig. 3 is the circuit diagram of the known semibridge system power supply unit of the utility model;
Fig. 4 is the configuration diagram of the utility model first preferred embodiment;
Fig. 5 is the configuration diagram of the utility model second preferred embodiment;
Fig. 6 is the configuration diagram of the utility model the 3rd preferred embodiment;
Fig. 7 is the configuration diagram of the utility model the 4th preferred embodiment.
Embodiment
Relevant detailed description of the present utility model and technology contents now just cooperate graphic being described as follows:
Seeing also shown in Figure 4ly, is the framework block schematic diagram of the utility model first preferred embodiment.
The utility model relates to a kind of transformation change-over circuit of power supply unit, and this transformation change-over circuit includes:
In be located at the primary winding coil 1 of transformer 10, be the alternating electromotive force of obtaining power supply;
In be located at the single secondary winding coil 2 and the secondary commutation circuit 3 of transformer 10, be converted to the first current potential direct current power by secondary winding coil 2 relative these primary winding coils 1 with the turn ratio transformation and through this secondary commutation circuit 3, wherein, the first current potential direct current power is+12V: and
N+1 group current potential is adjusted circuit B
1～B
N+1, being connected in parallel in this first current potential direct current power, this every group of current potential adjusted circuit B
1～B
N+1Be benchmark electric power and change and press with this first current potential direct current power to the N+1 of different current potential organizes the second current potential direct current power, this N 〉=1, wherein, this current potential is adjusted circuit B
1～B
N+1Can be DC-to-DC converter (DC/DC Converter), magamp feedback control circuit or pressurizer (Regulator); In the present embodiment, N=2, single secondary winding coil 2 outputs are connected in parallel, and how the group current potentials are adjusted circuit B
1, B
2, it is exported respectively+5V ,+3.3V current potential direct current power.
Thus, the first current potential direct current power of secondary winding coil 2 can be adjusted circuit B via current potential
1, B
2The different current potential direct current power of the many groups of output, and can avoid the different potentials output to limit the electrical efficiency unfavorable condition that is caused mutually, and can prevent that the electric power between the different potentials output from disturbing.
Seeing also shown in Figure 5ly, is the circuit diagram of the utility model second preferred embodiment.
The difference of the present embodiment and first embodiment be in:
Current potential is adjusted circuit B
1, B
2Be to be parallel to secondary commutation circuit 3, and directly carry out direct current change to press with export many group current potential direct current power+5V ,+3.3V.
Thus, current potential is adjusted circuit B
1, B
2 Secondary commutation circuit 3 need not be set up in the rear end, and only needs to adjust circuit B by secondary winding coil 2 current potentials in parallel
1, B
2, reduce circuit complexity.
Seeing also shown in Figure 6ly, is the circuit diagram of the utility model the 3rd preferred embodiment.
The difference of the present embodiment and first embodiment be in:
Thus, two independently go up coil windings 21 and can export with lower coil winding 22+5V ,+different current potential two direct current powers of 3.3V.
Seeing also shown in Figure 7ly, is the circuit diagram of the utility model the 4th preferred embodiment.
The difference of present embodiment and the 3rd embodiment be in:
Single coil windings is connected in parallel, and how the group current potentials are adjusted circuit, and the second current potential direct current power that the current potential of these whole single coil windings parallel connections is adjusted the pressure regulation output of circuit institute is different voltage level, wherein, last coil windings 21 is connected in parallel with lower coil winding 22 rear ends, and how the group current potentials are adjusted circuit B
1～B
N+1, and current potential is adjusted circuit B
1～B
N+1Identical or the different current potential direct current power of the many groups of output.
Notice that in the present embodiment, the current potential of these whole single coil windings 21,22 parallel connections is adjusted circuit B
1, B
2The second current potential direct current power of institute's pressure regulation output is the different voltage levels of many groups, yet in practice, the current potential of the single coil windings parallel connection of this part is adjusted circuit B
1～B
N+1The second current potential direct current power of institute's pressure regulation output also can be identical voltage level.
Whereby, independently go up coil windings 21 and can adjust circuit B by many groups current potential for two with lower coil winding 22
1～B
N+1Identical or the different current potential direct current power of the many groups of output.In sum, because being utilization, the utility model exports the secondary winding coil 2 of the first current potential direct current power to keep high electrical efficiency, the different potentials output limits the electrical efficiency unfavorable condition that is caused mutually in the known technology to avoid, and adjusts circuit B by current potential
1～B
N+1Export the second current potential direct current power reaching the effect of elasticity supply of electric power, and can prevent effectively that the electric power between different current potential from disturbing, so the utility model has progressive and meets the condition of applying for novel patent.
Below the utility model is made a detailed description, the above is preferred embodiment of the present utility model only, and can not limit the scope that the utility model is implemented.Be all equalization variations of in the utility model application range, being done and modification etc., all should still belong within the patent covering scope of the present utility model.
Claims (12)
1. the transformation change-over circuit of a power supply unit is characterized in that, described transformation conversion
Circuit includes:
Primary winding coil (1);
Secondary winding coil (2) and secondary commutation circuit (3) are to be converted to the first current potential direct current power by the described relatively primary winding coil of described secondary winding coil (2) (1) with a turn ratio transformation and through described secondary commutation circuit (3);
N+1 group current potential is adjusted circuit (B
1～B
N+1), be to be connected in parallel in the described first current potential direct current power, described every group of current potential adjusted circuit (B
1～B
N+1) be benchmark electric power and change press to the N+1 of different current potential organizes the second current potential direct current power with the described first current potential direct current power, N 〉=1 wherein.
2. the transformation change-over circuit of power supply unit according to claim 1 is characterized in that, described current potential is adjusted circuit (B
1～B
N+1) be DC-to-DC converter.
3. the transformation change-over circuit of power supply unit according to claim 1 is characterized in that, described current potential is adjusted circuit (B
1～B
N+1) be the magamp feedback control circuit.
4. the transformation change-over circuit of power supply unit according to claim 1 is characterized in that, described current potential is adjusted circuit (B
1～B
N+1) be pressurizer.
5. the transformation change-over circuit of power supply unit according to claim 1 is characterized in that, described current potential is adjusted circuit (B
1～B
N+1) be to be parallel to secondary winding coil (2) output and separate connection has secondary commutation circuit (3) to export the second current potential direct current power.
6. the transformation change-over circuit of power supply unit according to claim 1 is characterized in that, described current potential is adjusted circuit (B
1～B
N+1) be to be parallel to the direct direct current of secondary commutation circuit (3) to change pressure to export the second current potential direct current power.
7. according to the transformation change-over circuit of each described power supply unit in the claim 1 to 6, it is characterized in that described secondary winding coil (2) constitutes with M+1 group coil windings in parallel (21,22), and be connected in parallel one group of current potential of single coil windings (21,22) is adjusted circuit (B
1～B
N+1), M 〉=1 wherein.
8. the transformation change-over circuit of power supply unit according to claim 7 is characterized in that, the single coil windings of described part (21,22) current potential in parallel is adjusted circuit (B
1～B
N+1) the second current potential direct current power of institute pressure regulation output is identical voltage level.
9. the transformation change-over circuit of power supply unit according to claim 7 is characterized in that, described whole single coil windings (21,22) current potential in parallel is adjusted circuit (B
1～B
N+1) the second current potential direct current power of institute pressure regulation output is different voltage level.
10. according to the transformation change-over circuit of each described power supply unit in the claim 1 to 6, it is characterized in that described secondary winding coil (2) constitutes with M+1 group coil windings in parallel (21,22), and single coil windings (21,22) is connected in parallel, and how the group current potentials are adjusted circuit (B
1～B
N+1), M 〉=1 wherein.
11. the transformation change-over circuit of power supply unit according to claim 10 is characterized in that, the single coil windings of described part (21,22) current potential in parallel is adjusted circuit (B
1～B
N+1) the second current potential direct current power of institute pressure regulation output is identical voltage level.
12. the transformation change-over circuit of power supply unit according to claim 10 is characterized in that, described whole single coil windings (21,22) current potential in parallel is adjusted circuit (B
1～B
N+1) the second current potential direct current power of institute pressure regulation output is different voltage level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620157726 CN200987126Y (en) | 2006-11-03 | 2006-11-03 | Transformation switching circuit for power supply apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620157726 CN200987126Y (en) | 2006-11-03 | 2006-11-03 | Transformation switching circuit for power supply apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200987126Y true CN200987126Y (en) | 2007-12-05 |
Family
ID=38916579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620157726 Expired - Fee Related CN200987126Y (en) | 2006-11-03 | 2006-11-03 | Transformation switching circuit for power supply apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200987126Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102810390A (en) * | 2012-09-04 | 2012-12-05 | 沈广贤 | Three-phase magnetism-dividing voltage regulating transformer and magnetism-dividing voltage regulating method thereof |
| CN104079187A (en) * | 2013-03-14 | 2014-10-01 | 全汉企业股份有限公司 | Power supply apparatus |
-
2006
- 2006-11-03 CN CN 200620157726 patent/CN200987126Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102810390A (en) * | 2012-09-04 | 2012-12-05 | 沈广贤 | Three-phase magnetism-dividing voltage regulating transformer and magnetism-dividing voltage regulating method thereof |
| CN104079187A (en) * | 2013-03-14 | 2014-10-01 | 全汉企业股份有限公司 | Power supply apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071205 Termination date: 20151103 |
|
| EXPY | Termination of patent right or utility model |