CN104578798A - Flyback switching power supply - Google Patents
Flyback switching power supply Download PDFInfo
- Publication number
- CN104578798A CN104578798A CN201410821281.7A CN201410821281A CN104578798A CN 104578798 A CN104578798 A CN 104578798A CN 201410821281 A CN201410821281 A CN 201410821281A CN 104578798 A CN104578798 A CN 104578798A
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- Prior art keywords
- inverse
- excitation type
- supply
- type switch
- switch power
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
- H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
- H02M5/10—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention provides a flyback switching power supply. A transformer in the flyback switching power supply comprises at least two mutually connected output windings, and a plurality of output windings can be connected in series and can be connected in parallel; when the plurality of output windings are connected in series, the flyback switching power supply can output high voltage and small current; when the plurality of output windings are connected in parallel, the flyback switching power supply can output low voltage and large current; the magnetic flux density and the stable operating point of a magnetic core in the transformer cannot be changed because of change of the series-parallel connection structure of the plurality of output windings, so that although output voltage and current are multiplied, voltage stress and operating duty cycle of a primary switch tube in the flyback switching power supply don't change, and a circuit can still work in a set optimized operating area; switching loss cannot be increased, a switching element with high voltage resistance is not used, the efficiency is higher than that in the prior art, and the device cost is reduced.
Description
Technical field
The present invention relates to switch power technology field, particularly relate to a kind of inverse-excitation type switch power-supply.
Background technology
Fig. 1 is the structural representation of a kind of inverse-excitation type switch power-supply common in prior art, comprise rectifier bridge 10, elementary filter capacitor 11, switching transistor 13, sampling resistor 14, control circuit 15, rectifier diode 16, secondary filter capacitor 17, and transformer 100 is formed.Wherein, described transformer 100 generally includes magnetic core 110, former limit winding 101, auxiliary winding 102 and exports winding 103.
Because of the applied environment of described inverse-excitation type switch power-supply, often require that its output voltage has the wider scope of application; And voltage stress as the switching transistor 13 of main switching device and rectifier diode 16 in described inverse-excitation type switch power-supply is all directly related with output voltage, if require the adjustable range expanding output voltage, just be bound to increase the voltage stress of switching device, and use withstand voltage high switching device can increase the cost of power supply; Increase switching loss simultaneously, reduce the efficiency of power supply.
Summary of the invention
In view of this, the invention provides a kind of inverse-excitation type switch power-supply, to solve that prior art expands the adjustable range of output voltage, the cost that causes is high and inefficient problem.
To achieve these goals, the technical scheme that provides of the embodiment of the present invention is as follows:
A kind of inverse-excitation type switch power-supply, the transformer in described inverse-excitation type switch power-supply comprises at least two interconnective output windings.
Preferably, the equal turn numbers of described output winding.
Preferably, described output winding is for being connected in series.
Preferably, described output winding is for being connected in parallel.
Preferably, when the output winding that described transformer comprises is two, described inverse-excitation type switch power-supply also comprises:
Be connected to described two export windings non-same polarity between the first switch module;
Be connected to described two export windings a pair Same Name of Ends between second switch module;
Be connected to described two and export another of windings to the 3rd switch module between Same Name of Ends.
Preferably, described first switch module, second switch module and the 3rd switch module are wire jumper.
Preferably, described first switch module, second switch module and the 3rd switch module are conductive plug.
Preferably, also comprise: the control module be connected with described first switch module, second switch module and the 3rd switch module respectively.
Preferably, described first switch module, second switch module and the 3rd switch module are relay.
Preferably, described first switch module, second switch module and the 3rd switch module are insulated gate bipolar transistor.
Preferably, described first switch module, second switch module and the 3rd switch module are triode.
Preferably, when the output winding that described transformer comprises is two, the rectifier diode of described inverse-excitation type switch power-supply is connected on described two and exports between winding.
Preferably, when the output winding that described transformer comprises is two, the rectifier diode of described inverse-excitation type switch power-supply is connected to described two and exports between a pair Same Name of Ends of winding; Described inverse-excitation type switch power-supply also comprises another diode, and another diode described is connected to described two and exports another of windings between Same Name of Ends.
Preferably, when the output winding that described transformer comprises is two, described inverse-excitation type switch power-supply also comprises another diode, one end of another diode described is connected with the tie point of the rectifier diode of described inverse-excitation type switch power-supply and described inverse-excitation type switch power-supply output, the other end of another diode described is connected with the one end exporting winding, and one end of described output winding is the Same Name of Ends that another that be connected with described rectifier diode exports winding output.
The application provides a kind of inverse-excitation type switch power-supply, and the transformer in described inverse-excitation type switch power-supply comprises at least two interconnective output windings; Can be connected in series between described multiple output winding, also can be connected in parallel; Time between described multiple output winding for being connected in series, described inverse-excitation type switch power-supply output HIGH voltage small area analysis can be made; Time between described multiple output winding for being connected in parallel, described inverse-excitation type switch power-supply output LOW voltage big current can be made; When not changing board design, by the change of series parallel structure between multiple output winding described in transformer, and then the output voltage of described inverse-excitation type switch power-supply and curent change is made to expand several times; Series parallel structure change due to described multiple output winding can't change magnetic flux density and the stable operating point of magnetic core in described transformer, although therefore output voltage and curent change several times, but voltage stress and the operative duty cycles of limit, described inverse-excitation type switch power-supply Central Plains switching tube do not change, and circuit can still be operated in the Optimization Work region of setting; Can not switching loss be increased, also without the need to using withstand voltage high switching device, higher and reduce device cost than prior art efficiency.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
A kind of inverse-excitation type switch power-supply figure that Fig. 1 provides for prior art;
A kind of inverse-excitation type switch power-supply figure that Fig. 2 provides for the embodiment of the present application;
A kind of inverse-excitation type switch power-supply figure that Fig. 3 provides for another embodiment of the application;
A kind of inverse-excitation type switch power-supply figure that Fig. 4 provides for another embodiment of the application;
A kind of inverse-excitation type switch power-supply figure that Fig. 5 provides for another embodiment of the application;
A kind of inverse-excitation type switch power-supply figure that Fig. 6 provides for another embodiment of the application;
A kind of inverse-excitation type switch power-supply figure that Fig. 7 provides for another embodiment of the application;
A kind of inverse-excitation type switch power-supply figure that Fig. 8 provides for another embodiment of the application.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The invention provides a kind of inverse-excitation type switch power-supply, to solve that prior art expands the adjustable range of output voltage, the cost that causes is high and inefficient problem.
Concrete, the transformer in described inverse-excitation type switch power-supply comprises at least two interconnective output windings.
Transformer in described inverse-excitation type switch power-supply comprises at least two interconnective output windings; When the output winding that described transformer comprises is two, can be connected in series between described multiple output winding, also can be connected in parallel; Time between described multiple output winding for being connected in series, described inverse-excitation type switch power-supply output HIGH voltage small area analysis can be made; Time between described multiple output winding for being connected in parallel, described inverse-excitation type switch power-supply output LOW voltage big current can be made; When not changing board design, by the change of series parallel structure between described multiple output windings of transformer, and then make the output voltage of described inverse-excitation type switch power-supply and curent change expand several times (when the output winding that described transformer is comprised is two, by the change of series parallel structure between two output windings described in transformer, and then the output voltage of described inverse-excitation type switch power-supply and curent change expansion can be made to be twice); Series parallel structure change due to described multiple output winding can't change magnetic flux density and the stable operating point of magnetic core in described transformer, although therefore output voltage and curent change several times, but voltage stress and the operative duty cycles of limit, described inverse-excitation type switch power-supply Central Plains switching tube do not change, and circuit can still be operated in the Optimization Work region of setting; Can not switching loss be increased, also without the need to using withstand voltage high switching device, higher and reduce device cost than prior art efficiency.
Preferably, the equal turn numbers of described output winding.
Preferably, described output winding is for being connected in series.
Preferably, described output winding is for being connected in parallel.
The equal turn numbers of described output winding, makes being connected in parallel between described output winding be achieved.And the connection in series-parallel relation between described output winding might not be defined in this, different settings can be carried out according to its concrete applied environment; The output voltage of described inverse-excitation type switch power-supply and electric current can be made to change, adopt any annexation between described multiple output winding all in the protection range of this application, repeat no longer one by one herein.Described inverse-excitation type switch power-supply can be selected according to actual needs; Export winding for two to be described, when described inverse-excitation type switch power-supply needs twice output voltage, two the described output windings be connected in series can be adopted, the output voltage of described inverse-excitation type switch power-supply is twice than prior art; When described inverse-excitation type switch power-supply needs twice output current, two the described output windings be connected in parallel can be adopted, the output current of described inverse-excitation type switch power-supply is twice than prior art.
Preferably, as shown in Figure 2, when the output winding that described transformer comprises is two, described inverse-excitation type switch power-supply also comprises:
Be connected to described two export windings non-same polarity between the first switch module 101;
Be connected to described two export windings a pair Same Name of Ends between second switch module 102;
Be connected to described two and export another of windings to the 3rd switch module 103 between Same Name of Ends.
Preferably, the first switch module 101, second switch module 102 and the 3rd switch module 103 are wire jumper.
Preferably, the first switch module 101, second switch module 102 and the 3rd switch module 103 are conductive plug.
When described inverse-excitation type switch power-supply does not comprise above-mentioned three switch modules, described two export winding can realize series connection or parallel connection in the production process of described inverse-excitation type switch power-supply type of attachment by PCB cabling.When described inverse-excitation type switch power-supply also comprises above-mentioned three switch modules, can make to produce and unitize, after production completes, then according to its application approach, switch-linear hybrid is carried out to above-mentioned three switch modules, makes described two output windings realize being connected in series or being connected in parallel.It can be wire jumper or conductive plug that concrete device is selected, and is not specifically limited herein, makes its applied environment and determine.
Preferably, described inverse-excitation type switch power-supply also comprises: the control module be connected with the first switch module 101, second switch module 102 and the 3rd switch module 103 respectively.
Preferably, the first switch module 101, second switch module 102 and the 3rd switch module 103 are relay.
Preferably, the first switch module 101, second switch module 102 and the 3rd switch module 103 are insulated gate bipolar transistor.
Preferably, the first switch module 101, second switch module 102 and the 3rd switch module 103 are triode.
When described inverse-excitation type switch power-supply also comprises the described control module be connected with the first switch module 101, second switch module 102 and the 3rd switch module 103 respectively, described inverse-excitation type switch power-supply can in application process, according to the control signal of described control module, realize setting or the change of described two output winding connections.
What deserves to be explained is; first switch module 101, second switch module 102 and the 3rd switch module 103 are not limited only to above-mentioned implementation; the device of described two output windings realization series connection or parallel connection or module can be made herein all to apply for, in protection range, repeating no longer one by one at this.
Preferably, as shown in Figure 3, the rectifier diode D1 of described inverse-excitation type switch power-supply is connected between described two output windings.
When exporting winding for being connected in series for described two, rectifier diode D1 can be like the prior art, being connected to one exports between winding and the positive pole of described inverse-excitation type switch power-supply output, also can be connected on described two exports between winding, again or be connected to another and export between winding and negative pole of described inverse-excitation type switch power-supply output and also can, be not specifically limited, depending on its applied environment herein.Now described inverse-excitation type switch power-supply merely add one than prior art and exports winding, can realize voltage and rise doubly output.
Preferably, as shown in Figure 4, the rectifier diode D1 of described inverse-excitation type switch power-supply is connected between a pair Same Name of Ends of described two output windings; Described inverse-excitation type switch power-supply also comprises another diode D2, and another diode D2 is connected to described two and exports another of windings between Same Name of Ends.
Now described inverse-excitation type switch power-supply merely add one than prior art and exports winding and another diode D2, can realize electric current and rise doubly output.
Preferably, as shown in Figure 5, described inverse-excitation type switch power-supply also comprises another diode D2, one end of another diode D2 is connected with the tie point of the rectifier diode D1 of described inverse-excitation type switch power-supply and described inverse-excitation type switch power-supply output, the other end of another diode D2 is connected with the one end exporting winding, and one end of described output winding is the Same Name of Ends that another that be connected with rectifier diode D1 exports winding output.
Be only a kind of example shown in Fig. 3, Fig. 4 and Fig. 5, wherein the direction of diode might not be defined in this, can depending on its applied environment.
Another embodiment of the present invention additionally provides a kind of inverse-excitation type switch power-supply, and described inverse-excitation type switch power-supply comprises three and exports winding, as shown in Fig. 6, Fig. 7 and Fig. 8.Figure 6 shows that and comprise the described inverse-excitation type switch power-supply that three export winding and respective switch module, preferably, can also control module be comprised; Figure 7 shows that the described inverse-excitation type switch power-supply comprising the output winding that three are connected in series; Figure 8 shows that the described inverse-excitation type switch power-supply comprising the output winding that three are connected in parallel.
Other comprise the described inverse-excitation type switch power-supply of more than three described output windings; also switch module, control module or other diodes can be comprised; its concrete principle is same as the previously described embodiments, repeats no longer one by one, all in protection scope of the present invention herein.
In the present invention, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.For device disclosed in embodiment, because it corresponds to the method disclosed in Example, so description is fairly simple, relevant part illustrates see method part.
Below be only the preferred embodiment of the present invention, those skilled in the art understood or realizes the present invention.To be apparent to one skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (14)
1. an inverse-excitation type switch power-supply, is characterized in that, the transformer in described inverse-excitation type switch power-supply comprises at least two interconnective output windings.
2. inverse-excitation type switch power-supply according to claim 1, is characterized in that, the equal turn numbers of described output winding.
3. inverse-excitation type switch power-supply according to claim 1 and 2, is characterized in that, described output winding is for being connected in series.
4. inverse-excitation type switch power-supply according to claim 2, is characterized in that, described output winding is for being connected in parallel.
5., according to the arbitrary described inverse-excitation type switch power-supply of Claims 1-4, it is characterized in that, when the output winding that described transformer comprises is two, described inverse-excitation type switch power-supply also comprises:
Be connected to described two export windings non-same polarity between the first switch module;
Be connected to described two export windings a pair Same Name of Ends between second switch module;
Be connected to described two and export another of windings to the 3rd switch module between Same Name of Ends.
6. inverse-excitation type switch power-supply according to claim 5, is characterized in that, described first switch module, second switch module and the 3rd switch module are wire jumper.
7. inverse-excitation type switch power-supply according to claim 5, is characterized in that, described first switch module, second switch module and the 3rd switch module are conductive plug.
8. inverse-excitation type switch power-supply according to claim 5, is characterized in that, also comprises: the control module be connected with described first switch module, second switch module and the 3rd switch module respectively.
9. inverse-excitation type switch power-supply according to claim 8, is characterized in that, described first switch module, second switch module and the 3rd switch module are relay.
10. inverse-excitation type switch power-supply according to claim 8, is characterized in that, described first switch module, second switch module and the 3rd switch module are insulated gate bipolar transistor.
11. inverse-excitation type switch power-supplies according to claim 8, is characterized in that, described first switch module, second switch module and the 3rd switch module are triode.
12. inverse-excitation type switch power-supplies according to claim 3, is characterized in that, when the output winding that described transformer comprises is two, the rectifier diode of described inverse-excitation type switch power-supply is connected on described two and exports between winding.
13. inverse-excitation type switch power-supplies according to claim 4, is characterized in that, when the output winding that described transformer comprises is two, the rectifier diode of described inverse-excitation type switch power-supply is connected to described two and exports between a pair Same Name of Ends of winding; Described inverse-excitation type switch power-supply also comprises another diode, and another diode described is connected to described two and exports another of windings between Same Name of Ends.
14. inverse-excitation type switch power-supplies according to claim 4, it is characterized in that, when the output winding that described transformer comprises is two, described inverse-excitation type switch power-supply also comprises another diode, one end of another diode described is connected with the tie point of the rectifier diode of described inverse-excitation type switch power-supply and described inverse-excitation type switch power-supply output, the other end of another diode described is connected with the one end exporting winding, and one end of described output winding is the Same Name of Ends that another that be connected with described rectifier diode exports winding output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410821281.7A CN104578798A (en) | 2014-12-25 | 2014-12-25 | Flyback switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410821281.7A CN104578798A (en) | 2014-12-25 | 2014-12-25 | Flyback switching power supply |
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| Publication Number | Publication Date |
|---|---|
| CN104578798A true CN104578798A (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410821281.7A Pending CN104578798A (en) | 2014-12-25 | 2014-12-25 | Flyback switching power supply |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105634296A (en) * | 2016-03-07 | 2016-06-01 | 深圳晶福源科技股份有限公司 | Electromobile charging power supply with wide-voltage and high-power output |
| WO2022155898A1 (en) * | 2021-01-22 | 2022-07-28 | 深圳市佳士科技股份有限公司 | Power supply circuit and power supply device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040190312A1 (en) * | 2003-03-24 | 2004-09-30 | Yokogawa Electric Corporation | Switching power supply |
| CN202008921U (en) * | 2011-03-15 | 2011-10-12 | 赵天鹏 | Multi-transformer energy storage device for single-stage flyback switch power source |
| CN103051198A (en) * | 2013-01-16 | 2013-04-17 | 东南大学 | Staggered parallel flyback driving power supply |
| CN203722477U (en) * | 2014-02-19 | 2014-07-16 | 中国电子科技集团公司第四十三研究所 | New type switch power circuit topology structure |
-
2014
- 2014-12-25 CN CN201410821281.7A patent/CN104578798A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040190312A1 (en) * | 2003-03-24 | 2004-09-30 | Yokogawa Electric Corporation | Switching power supply |
| CN202008921U (en) * | 2011-03-15 | 2011-10-12 | 赵天鹏 | Multi-transformer energy storage device for single-stage flyback switch power source |
| CN103051198A (en) * | 2013-01-16 | 2013-04-17 | 东南大学 | Staggered parallel flyback driving power supply |
| CN203722477U (en) * | 2014-02-19 | 2014-07-16 | 中国电子科技集团公司第四十三研究所 | New type switch power circuit topology structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105634296A (en) * | 2016-03-07 | 2016-06-01 | 深圳晶福源科技股份有限公司 | Electromobile charging power supply with wide-voltage and high-power output |
| WO2022155898A1 (en) * | 2021-01-22 | 2022-07-28 | 深圳市佳士科技股份有限公司 | Power supply circuit and power supply device |
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Application publication date: 20150429 |