CN202004652U - Auxiliary power supply system achieving DC input and multiplexed DC output - Google Patents
Auxiliary power supply system achieving DC input and multiplexed DC output Download PDFInfo
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- CN202004652U CN202004652U CN 201120079426 CN201120079426U CN202004652U CN 202004652 U CN202004652 U CN 202004652U CN 201120079426 CN201120079426 CN 201120079426 CN 201120079426 U CN201120079426 U CN 201120079426U CN 202004652 U CN202004652 U CN 202004652U
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Abstract
The utility model provides an auxiliary power supply system achieving DC (Direct Current) input and multiplexed DC output, which solves the problem that the overall size is large in the power supply scheme of a conventional auxiliary power supply. The auxiliary power supply system achieving DC input and multiplexed DC output comprises a transformer, wherein, a primary winding and a secondary winding are arranged on the transformer; one or a plurality of branch circuits sharing the ground are extracted from the secondary winding; and a main circuit and the branch circuits of the secondary winding are rectified and filtered respectively so as to obtain two or a plurality of output power supplies sharing the ground. The auxiliary power supply system achieving DC input and multiplexed DC output has simple and reliable circuit, adopts less components, and is very convenient to design.
Description
Technical field
The utility model relates to a kind of secondary power system.
Background technology
In all devices, instrument, secondary power system is that the entire equipment energy provides maincenter, the module that is absolutely necessary, and this Module Design quality is directly connected to the cost of the reliability and the entire equipment of equipment operation.In the equipment that has, need the power supply of multichannel different brackets power supply, most variations is when the design transformer at present, adopts a plurality of winding outputs, thereby reaches the purpose of plurality of voltages output, this moment, the size of transformer just required greatly, and the overall dimension of relative power supply is also big.In the modern electronic equipment development, huge increasingly for the miniaturization demand day of equipment.And need be under the less situation of overall dimension at each power supply.
Summary of the invention
The purpose of this utility model is the problems referred to above at existing accessory power supply power supply plan existence, and the secondary power system of the less direct current input multi-channel DC output of a kind of overall dimension is provided.
The purpose of this utility model is achieved in that the utility model comprises a transformer, described transformer is provided with an elementary winding and a secondary winding, extracting in described secondary winding has one or more branch road altogether, the main road of secondary winding and each branch road to obtain two respectively to a plurality of out-put supplies altogether after rectification, filtering.
Technique effect of the present utility model is: the utility model circuit is simple, and reliable, used components and parts are less, and design very convenient.
Description of drawings
Fig. 1 is the circuit theory diagrams of embodiment one.
Fig. 2 is the circuit theory diagrams of embodiment two.
Embodiment
Referring to Fig. 1, embodiment one comprises a transformer T1, and transformer T1 is provided with an elementary winding and a secondary winding, and elementary winding is the voltage input, one termination input voltage vin+and, the other end is connected with the D utmost point of metal-oxide-semiconductor Q1; Secondary winding is voltage output, embodiment one from secondary winding, extract have one with main road branch road altogether, main road series diode D1 at secondary winding carries out rectification, shunt capacitance C1 carries out filtering again, branch road series diode D2 at secondary winding carries out rectification, shunt capacitance C2 carries out filtering again, and the main road of secondary winding and branch road obtain two out-put supply Vout_1 and Vout_2 altogether respectively after rectification, filtering like this.
The utility model also is provided with feedback circuit between the main road of the G of the metal-oxide-semiconductor Q1 utmost point and secondary winding.Feedback circuit comprises resistance R 1, resistance R 2, comparison amplifier U1 and PWM pulse width controller U2 among the embodiment one, resistance R 1 and resistance R 2 series connection backs are in parallel with the main road of secondary winding, the input of comparison amplifier U1 is connected between resistance R 1 and the resistance R 2, the output of comparison amplifier U1 is connected with the input of the pulse width controller U2 of direct voltage control, and the output of PWM pulse width controller U2 is connected with the G of the metal-oxide-semiconductor Q1 control utmost point.
Two diode D1 among the embodiment one, the D2 rectification, two capacitor C 1, C2 filtering energy storage, diode D1 and capacitor C 1 are formed major loop, resistance R 1 and R2 sampling, comparison amplifier U1 relatively amplifies, the turn-on and turn-off of PWM pulse width controller U2 control Q1, like this by diode D1, capacitor C 1, resistance R 1 and R2, comparison amplifier U1, PWM pulse width controller U2 forms main control loop, the time of the turn-on and turn-off of control Q1, reach the voltage output Vout_1 that stablizes main road, stablize the purpose of the voltage output Vout_2 of the bypass of forming by diode D2 and capacitor C 2 (being branch road) simultaneously.
Referring to Fig. 2, embodiment two is the liters that prolong of embodiment one, embodiment two comprises transformer T1, in the secondary winding of transformer T1, extract have three with main road branch road altogether, be provided with diode D1 and capacitor C 1 at main road, be respectively equipped with diode D2 and capacitor C 2 at three branch roads, diode D3 and capacitor C 3, diode D4 and capacitor C 4, four diode D1, D2, D3, the D4 rectification, four capacitor C 1, C2, C3, C4 filtering energy storage, resistance R 1, the R2 sampling, comparison amplifier U1 relatively amplifies, PWM pulse width controller U2 feedback, like this by diode D1, capacitor C 1, resistance R 1 and R2, comparison amplifier U1, PWM pulse width controller U2 forms main control loop, the time of control Q1 turn-on and turn-off, and then reach and stablize main road output voltage V out_1, stablize branch road output voltage V out_2 simultaneously, the purpose of Vout_3 and Vout_4.
The branch road that extracts from secondary winding in the utility model can be provided with one or more.
Claims (4)
1. a direct current is imported the secondary power system that multi-channel DC is exported, it is characterized in that: comprise a transformer, described transformer is provided with an elementary winding and a secondary winding, extracting in described secondary winding has one or more branch road altogether, the main road of secondary winding and each branch road to obtain two respectively to a plurality of out-put supplies altogether after rectification, filtering.
2. the secondary power system of direct current input multi-channel DC according to claim 1 output, it is characterized in that: be in series with diode respectively at the main road of described secondary winding and each branch road and carry out rectification, shunt capacitance carries out filtering again, obtains two to a plurality of out-put supplies altogether.
3. the secondary power system of direct current input multi-channel DC according to claim 1 and 2 output, it is characterized in that: an end of described elementary winding is connected with the D utmost point of metal-oxide-semiconductor Q1, is provided with feedback circuit between the main road of the G of the metal-oxide-semiconductor Q1 utmost point and secondary winding.
4. the secondary power system of direct current input multi-channel DC according to claim 3 output, it is characterized in that: described feedback circuit comprises resistance R 1, resistance R 2, comparison amplifier U1 and PWM pulse width controller U2, described resistance R 1 and resistance R 2 series connection backs are in parallel with the main road of secondary winding, the input of comparison amplifier U1 is connected between resistance R 1 and the resistance R 2, the output of comparison amplifier U1 is connected with the input of PWM pulse width controller U2, and the output of PWM pulse width controller U2 is connected with the G utmost point of metal-oxide-semiconductor Q1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120079426 CN202004652U (en) | 2011-03-23 | 2011-03-23 | Auxiliary power supply system achieving DC input and multiplexed DC output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120079426 CN202004652U (en) | 2011-03-23 | 2011-03-23 | Auxiliary power supply system achieving DC input and multiplexed DC output |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202004652U true CN202004652U (en) | 2011-10-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120079426 Expired - Fee Related CN202004652U (en) | 2011-03-23 | 2011-03-23 | Auxiliary power supply system achieving DC input and multiplexed DC output |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202004652U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102377347A (en) * | 2011-10-17 | 2012-03-14 | 广州三晶电气有限公司 | Flyback converter for implementing auxiliary output voltage control by using triode and control method |
-
2011
- 2011-03-23 CN CN 201120079426 patent/CN202004652U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102377347A (en) * | 2011-10-17 | 2012-03-14 | 广州三晶电气有限公司 | Flyback converter for implementing auxiliary output voltage control by using triode and control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHENZHEN JINGFUYUAN TECH. CO., LTD. Free format text: FORMER NAME: SHENZHEN JINGFUYUAN TECHNOLOGY CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: Shenzhen Nanshan District City, Guangdong province 518000 white pine Luxili Nangang Second Industrial Park 12 Building 1, 2, 5 floor Patentee after: SHENZHEN JINGFUYUAN TECHNOLOGY CO., LTD. Address before: Shenzhen Nanshan District City, Guangdong province 518000 white pine Luxili Nangang Second Industrial Park twelfth 5 floor Patentee before: Shenzhen Jingfuyuan Tech Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111005 Termination date: 20190323 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |