CN100544176C - The power supply unit of multi-output voltages - Google Patents
The power supply unit of multi-output voltages Download PDFInfo
- Publication number
- CN100544176C CN100544176C CNB2005100904721A CN200510090472A CN100544176C CN 100544176 C CN100544176 C CN 100544176C CN B2005100904721 A CNB2005100904721 A CN B2005100904721A CN 200510090472 A CN200510090472 A CN 200510090472A CN 100544176 C CN100544176 C CN 100544176C
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- supply unit
- power supply
- tension electricity
- circuit
- transformer
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Abstract
The invention discloses a kind of power supply unit of multi-output voltages, it is that the direct current of this power supply unit output mode with the dividing potential drop current-sharing is disposed, the direct current of exporting by each transformer in the transforming circuit of this power supply unit comprises a high-tension electricity and a low-voltage power at least, and each high-tension electricity integration in parallel connection that each transformer of this transforming circuit is exported exports the rear end load in same circuit and with it, each low-voltage power exports the rear end load to uniline.Thus, realize reducing the function that transformer carries and keeps the good electrical effect.
Description
Technical field
The present invention relates to a kind of power supply unit of multi-output voltages, particularly a kind of voltage follower circuit that uses a plurality of transformer changing voltages and adopt the power supply unit of the equal stream mode configuring direct current electricity of dividing potential drop output.
Background technology
Power supply unit is the indispensable basic equipment that working power is provided to computer system, especially under the trend that world-wide web and multimedia technology are showing improvement or progress day by day, promotes day by day for the requirement of the effective supply power of power supply unit.Therefore, how to avoid the damage that causes owing to the long-term heavy duty of power supply unit or overload work, and then prevent that the situation of the work interruption that causes because of power supply unit is unusual or computer system damage from can not appear in computer system, becomes the emphasis of existing power supply supply manufacturer research and development.
Fig. 1 shows the circuit box schematic diagram of power supply unit output DC of the prior art.The power supply unit that connects external power source includes an elementary current rectifying and wave filtering circuit, a transformer and a level current rectifying and wave filtering circuit successively to change many group direct currents and to export it to rear end load, and the direct current of output then has 12V, 5V, 3.3V equipotential specification.Because the electric power of the electronic equipment of user operation increases day by day, be single transformer and prior art adopts, if want to meet high-power demand, so just must increase relative coil writhing number to expand its overall volume.But under the situation that can't change power supply unit apparent size and inner space, the making of single transformer is difficulty quite.Not only volume can't meet the requirements and the high temperature that produced when changing voltage also can be influenced the operation of other electronic component because can't effectively reduce.In addition, because the output transformation of single transformer is the direct current of many group different potentials, relative power loss also can increase.
In order to overcome the defective of single transformer, as shown in Figures 2 and 3, adopted in the mode of multiple transformers dividing potential drop and come output DC.But as can be seen from the figure, the one transformer is exported the direct current of single 12V in the technology of Fig. 2, and another transformer is still kept the direct current of output 12V, 5V and 3.3V.Though the 12V direct current as main electrification can be shunted design thus, export the galvanic transformer of many groups to being used to, the electric current that is passed through does not reduce, and therefore, this transformer is easy to generate the problem that temperature is increased sharply all the better.In technology shown in Figure 3, though control high-tension electricity and low-voltage power respectively by single transformer, but since with the direct current of 12V as main electrification, so the temperature rising state of two transformers will produce difference, and owing to overall volume can't really reduce effectively, so in the face of bigger power demand, still can there be the problem of assembling difficulty in power supply unit.
Summary of the invention
Main purpose of the present invention is to overcome above-mentioned defective, for fear of the existence of defective, the invention provides a kind of power supply unit that uses a plurality of transformer changing voltages and adopt the multi-output voltages of the equal stream mode configuring direct current electricity of dividing potential drop output.
According to the power supply unit of multi-output voltages of the present invention, wherein this power supply unit comprises that transforming circuit that an elementary current rectifying and wave filtering circuit, is made up of a plurality of transformers and a level current rectifying and wave filtering circuit are to change many group direct currents and to export it to rear end load.Direct current is divided into a high-tension electricity and a plurality of low-voltage power in the mode of current potential, it is characterized in that: the direct current of the output that each transformer is changed of transforming circuit comprises a high-tension electricity and a low-voltage power at least, and each high-tension electricity integration in parallel connection that each transformer of transforming circuit is exported exports the rear end load on same circuit and with it, each low-voltage power exports the rear end load to uniline.
Therefore, the present invention has following advantage, promptly, the coiling volume of each transformer will tend to equalization, and the electric current throughput is close to and equates, therefore the temperature rising state and the loaded state of each transformer also will tend to identical, can realize keeping the function of power supply unit good electrical effect thus and prolonged its useful life effectively.
Description of drawings
Fig. 1～3rd, the circuit box schematic diagram of the embodiment of power supply unit of the prior art;
Fig. 4 is the circuit box schematic diagram of the embodiment of the invention.
Embodiment
About detailed content of the present invention and technical descriptioon, existing accompanying drawings is as follows:
Seeing also shown in Figure 4ly, is the circuit box schematic diagram of the embodiment of the invention.As shown in the figure, the present invention is a kind of voltage follower circuit of power supply unit.The power supply unit of this connection external power source 10 comprises an elementary current rectifying and wave filtering circuit 20, one by a plurality of transformers 31 and 32 transforming circuits of forming 30, and a level current rectifying and wave filtering circuit 40 is to change many group direct currents and to export it to rear end load 50, this direct current is divided into a high-tension electricity and a plurality of low-voltage power by the mode of current potential, wherein, the present invention is each transformer 31 that makes by this transforming circuit 30, the direct current of 32 conversion outputs comprises a high-tension electricity and a low-voltage power at least, and each transformer 31 by this transforming circuit 30, each high-tension electricity integration in parallel connection of 32 outputs is on same circuit and export rear end load 50 subsequently to, and each low-voltage power exports rear end load 50 to by uniline.According to the electronic equipment required electric power of existing rear end load 50, above-mentioned direct current includes 12V, 5V, 3.3V, and it is 12V that embodiments of the invention limit this high-tension electricity, and this low-voltage power is 5V and 3.3V.And as shown in the figure, secondary commutation filter circuit 40 can be integrated this each high-tension electricity and be electrically connected to level current rectifying and wave filtering circuit 40 one time, and all the other low-voltage powers then are connected to level current rectifying and wave filtering circuit 40 respectively one time.According to prior art, also all electric power can be integrated into same secondary commutation filter circuit 40 certainly.Similarly, elementary current rectifying and wave filtering circuit 20 and other electronic circuit (for example power factor corrector, PWM controller, power switch etc.) of being arranged in pairs or groups also can be the configuration of single group or many groups, but configuration quantity does not all influence technical characterictic of the present invention.In addition, should be noted that here embodiment all indicates final galvanic current potential in order to make the auditor can clearly understand the embodiment accompanying drawing, thereby ignored the current potential square wave before the rectifying and wave-filtering.
As can be seen, the present invention is dispensed to two transformers 31,32 with high-tension electricity from the circuit diagram of the embodiment of the invention shown in Figure 4, and low-voltage power also is assigned to respectively on the different transformer 31,32.Therefore, but two transformer 31,32 volumes help making the large power supply supply with equalization, and the electric power in rear end load 50 is under the heavy condition, because electric current is on average carried by two transformers 31,32, so two transformers 31,32 will the temperature rising state that the electric current concentrations is produced can not occur.In addition, possess the good electric effect, prolonged its useful life effectively except making two transformers 31,32.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. the power supply unit of a multi-output voltages, described power supply unit comprises that transforming circuit that an elementary current rectifying and wave filtering circuit, is made up of a plurality of transformers and a plurality of secondary commutation filter circuit are to change many group direct currents and to export it to rear end load, described direct current is divided into a high-tension electricity and a plurality of low-voltage power in the mode of current potential, it is characterized in that:
The direct current of the output that each transformer is changed of described transforming circuit comprises that at least a high-tension electricity and is lower than the low-voltage power of described high-tension electricity, and described each high-tension electricity integration in parallel connection that each transformer of described transforming circuit is exported exports the load of described rear end on same circuit and by secondary commutation filter circuit corresponding with it, described each low-voltage power exports the load of described rear end with uniline to by secondary commutation filter circuit corresponding with it.
2. the power supply unit of multi-output voltages according to claim 1 is characterized in that, described direct current includes 12V, 5V, 3.3V, and described high-tension electricity is 12V, and described low-voltage power then is 5V and 3.3V.
3. the power supply unit of multi-output voltages according to claim 1 is characterized in that, described each high-tension electricity is integrated a level current rectifying and wave filtering circuit that is electrically connected in described a plurality of secondary commutation filter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100904721A CN100544176C (en) | 2005-08-15 | 2005-08-15 | The power supply unit of multi-output voltages |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100904721A CN100544176C (en) | 2005-08-15 | 2005-08-15 | The power supply unit of multi-output voltages |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1917347A CN1917347A (en) | 2007-02-21 |
| CN100544176C true CN100544176C (en) | 2009-09-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100904721A Expired - Fee Related CN100544176C (en) | 2005-08-15 | 2005-08-15 | The power supply unit of multi-output voltages |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100544176C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101640472A (en) * | 2008-07-28 | 2010-02-03 | 上海斯堪亚电气调速设备有限公司 | Intelligent integrated elevator system assistant power device |
| KR20130044783A (en) * | 2011-10-24 | 2013-05-03 | 엘지이노텍 주식회사 | Grid connected device, grid connected system and method thereof |
| CN104980024B (en) * | 2015-06-30 | 2017-10-17 | 成都芯源系统有限公司 | Current equalizing circuit and control method thereof |
-
2005
- 2005-08-15 CN CNB2005100904721A patent/CN100544176C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1917347A (en) | 2007-02-21 |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090923 Termination date: 20120815 |