CN202713154U - Off-line low loss low peak secondary synchronous power supply - Google Patents
Off-line low loss low peak secondary synchronous power supply Download PDFInfo
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- CN202713154U CN202713154U CN 201220242177 CN201220242177U CN202713154U CN 202713154 U CN202713154 U CN 202713154U CN 201220242177 CN201220242177 CN 201220242177 CN 201220242177 U CN201220242177 U CN 201220242177U CN 202713154 U CN202713154 U CN 202713154U
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Abstract
The utility model relates to an off-line low loss low peak secondary synchronous power supply which comprises an input filter circuit, is orderly connected with a switch circuit, a high-frequency isolation transformer, a synchronous rectification circuit, and then carries out output through a filter circuit. The synchronous rectification circuit is connected with an output voltage stabilization circuit, a photoelectric coupling circuit and a PWM control circuit and the switch circuit. The output voltage stabilization circuit is connected with the filter circuit through a voltage compensation circuit. According to the utility model, the overall efficiency of the power supply is improved; power supply output ripple and voltage accuracy are effectively guaranteed; the technology indicators are excellent; and the efficiency is high.
Description
Technical field
The utility model relates to a kind of synchronous mode power supply, relates in particular to a kind of low-loss low peak secondary synchronization formula power supply.
Background technology
Modular power source is widely used, generally take general single-end ortho-exciting circuit as example, most of modular power source forms and comprises that switching circuit, isolating transformer, rectification circuit, pwm control circuit, voltage stabilizing circuit design, the all technical level is lower, and reliability can not satisfy important events to be used, as shown in Figure 1.
As shown in Figure 1, general single-end ortho-exciting circuit for example is input as DC12V, and output voltage 3.3V electric current is the modular power source of 10A, selects conventional power device, and when adopting this circuit, power-efficient is about 80%, and output ripple is about 200mV, and loss power is 8.25W.The power supply delivery efficiency is low and ripple is large, suppresses output ripple even add filter, can make to take that volume becomes large, output voltage precision and regulation can't ensure precisely controlled.
The utility model content
The problem that the utility model need to solve just is to overcome the defective of prior art, and a kind of offline model low-loss low peak secondary synchronization formula power supply is provided.The utility model improves power source integral efficient, power supply output ripple and voltage accuracy and obtains effective guarantee, and technical indicator is good, efficient is high.
For addressing the above problem, the utility model adopts following technical scheme:
A kind of offline model low-loss low peak secondary synchronization formula power supply, it comprises input filter circuit, and export by filter circuit behind connecting valve circuit, high-frequency isolation transformer, the circuit of synchronous rectification successively, described circuit of synchronous rectification also connects output voltage stabilizing circuit, photoelectric coupling circuit and pwm control circuit and is connected to described switching circuit, and described output voltage stabilizing circuit is connected to described filter circuit by a voltage compensating circuit.
Described offline model low-loss low peak secondary synchronization formula power supply, described filter circuit is the ultracrystallite filter circuit.
In the utility model, input voltage carries out filtering through input filter circuit first, come the control switch circuit through pwm control circuit, through high-frequency isolation transformer power is changed, carry out rectification through circuit of synchronous rectification, secondary voltage stabilizing circuit and photoelectric coupling circuit carry out voltage stabilizing and feed back signal to pwm control circuit, carry out Ripple Suppression and output voltage control finally by ultracrystallite filter circuit and voltage compensating circuit.
For example be input as DC12V, output voltage 3.3V electric current is the modular power source of 10A, when adopting the utility model circuit, power-efficient is about 87%, output ripple is about 10mV, loss power is that 4.93W reduces loss 3.32W than the same parameter power supply with general single-end ortho-exciting circuit design, and ripple has reduced 20 times simultaneously.The utlity model has the characteristics such as defeated efficient is high, ripple is low, the output voltage precision is high, functional reliability is high, adaptive capacity to environment is strong.
Description of drawings
Fig. 1 is described background technology schematic diagram;
Fig. 2 is circuit module schematic diagram of the present utility model.
Embodiment
As shown in Figure 2, a kind of offline model low-loss low peak secondary synchronization formula power supply, it comprises input filter circuit 1, and export by filter circuit 5 behind connecting valve circuit 2, high-frequency isolation transformer 3, the circuit of synchronous rectification 4 successively, described circuit of synchronous rectification 4 also connects output voltage stabilizing circuit 6, photoelectric coupling circuit 7 and pwm control circuit 8 and is connected to described switching circuit 2, and described output voltage stabilizing circuit 6 is connected to described filter circuit 5 by a voltage compensating circuit 9.
Described offline model low-loss low peak secondary synchronization formula power supply, described filter circuit 5 is the ultracrystallite filter circuit, it is a common mode disturbances inhibitor that adds a small amount of peripheral components take ultracrystallite as magnetic core, it is measure-alike by two, the coil that the number of turn is identical is wound on the same ultracrystallite toroidal core symmetrically, form a four-terminal device, present large inductance for common-mode signal inhibited.Principle is that the magnetic flux in the magnet ring superposes mutually when flowing through common mode current, thereby has sizable inductance value, and common mode current is played inhibitory action.Therefore common mode inductance can suppress common mode interference signal effectively in balanced circuit, effectively reduces the output ripple of power supply.
It should be noted that at last: obviously, above-described embodiment only is for the utility model example clearly is described, and is not the restriction to execution mode.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all execution modes exhaustive.And the apparent variation of being amplified out thus or change still are among the protection range of the present utility model.
Claims (2)
1. offline model low-loss low peak secondary synchronization formula power supply, it comprises input filter circuit, and export by filter circuit behind connecting valve circuit, high-frequency isolation transformer, the circuit of synchronous rectification successively, described circuit of synchronous rectification also connects output voltage stabilizing circuit, photoelectric coupling circuit and pwm control circuit and is connected to described switching circuit, it is characterized in that, described output voltage stabilizing circuit is connected to described filter circuit by a voltage compensating circuit.
2. offline model low-loss low peak secondary synchronization formula power supply according to claim 1 is characterized in that, described filter circuit is the ultracrystallite filter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220242177 CN202713154U (en) | 2012-05-28 | 2012-05-28 | Off-line low loss low peak secondary synchronous power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220242177 CN202713154U (en) | 2012-05-28 | 2012-05-28 | Off-line low loss low peak secondary synchronous power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202713154U true CN202713154U (en) | 2013-01-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220242177 Expired - Fee Related CN202713154U (en) | 2012-05-28 | 2012-05-28 | Off-line low loss low peak secondary synchronous power supply |
Country Status (1)
| Country | Link |
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| CN (1) | CN202713154U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104678203A (en) * | 2013-11-28 | 2015-06-03 | 北车大连电力牵引研发中心有限公司 | Electromagnetic compatibility detection device for current transformer |
| CN108572579A (en) * | 2018-07-26 | 2018-09-25 | 黄河科技学院 | Agricultural greenhouse Data Management Analysis system based on Internet of Things |
| CN110557016A (en) * | 2018-05-31 | 2019-12-10 | 西门子(深圳)磁共振有限公司 | Power supply device and magnetic resonance imaging system |
-
2012
- 2012-05-28 CN CN 201220242177 patent/CN202713154U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104678203A (en) * | 2013-11-28 | 2015-06-03 | 北车大连电力牵引研发中心有限公司 | Electromagnetic compatibility detection device for current transformer |
| CN110557016A (en) * | 2018-05-31 | 2019-12-10 | 西门子(深圳)磁共振有限公司 | Power supply device and magnetic resonance imaging system |
| CN110557016B (en) * | 2018-05-31 | 2021-07-30 | 西门子(深圳)磁共振有限公司 | Power supply device and magnetic resonance imaging system |
| CN108572579A (en) * | 2018-07-26 | 2018-09-25 | 黄河科技学院 | Agricultural greenhouse Data Management Analysis system based on Internet of Things |
| CN108572579B (en) * | 2018-07-26 | 2023-10-13 | 黄河科技学院 | Agricultural greenhouse data processing analysis system based on Internet of things |
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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: 20130130 Termination date: 20180528 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |