CN105680676A - Switching power supply output circuit - Google Patents
Switching power supply output circuit Download PDFInfo
- Publication number
- CN105680676A CN105680676A CN201610157917.1A CN201610157917A CN105680676A CN 105680676 A CN105680676 A CN 105680676A CN 201610157917 A CN201610157917 A CN 201610157917A CN 105680676 A CN105680676 A CN 105680676A
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- CN
- China
- Prior art keywords
- electric capacity
- resistance
- diode
- power supply
- outfan
- Prior art date
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a switching power supply output circuit, which comprises a transformer T1, a diode VD1, a diode VD2, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a resistor R1, a resistor R2, a resistor R3 and a ripple suppression circuit, wherein the ripple suppression circuit can effectively filter out ripples, and is connected with the capacitor C2 and the resistor R2. The output ripples of the switching power supply output circuit are small.
Description
Technical field
The present invention relates to electric energy meter technical field, be especially the switch power supply output circuit of a kind of electric energy meter.
Background technology
The switch power supply output circuit of prior art includes transformator T1, diode VD1, VD2, electric capacity C1, C2, C3, C4, C5, resistance R1, R2, R3; Described transformator T1 is provided with the first outfan and the second outfan; The Single port of described first outfan is connected with the anode of one end of electric capacity C1, diode VD1; The other end of described electric capacity C1 is connected with one end of resistance R1, and the other end of described resistance R1 is connected with the negative electrode of diode VD1, one end of diode C2, one end of resistance R2, one end of electric capacity C3, working power positive pole; The another port of described first outfan, the other end of electric capacity C2, the other end of resistance R2, electric capacity C3 the other end be all connected with common ground end; The Single port of described second outfan is connected with the anode of diode VD2, and the negative electrode of described diode VD2 is connected with one end of electric capacity C4, one end of electric capacity C5, one end of resistance R3, working power positive pole; The another port of described second outfan, the other end of electric capacity C4, the other end of resistance R3, electric capacity C5 the other end be all connected with common ground end. The switch power supply output circuit of said structure has the disadvantage that owing to the electromagnetic interference of Switching Power Supply is big, ripple factor is big, therefore the output ripple of Switching Power Supply is bigger, generally can be relatively larger, 200-300 millivolt can be reached, thus causing that the power supply output quality of Switching Power Supply is relatively low.
Summary of the invention
The technical problem to be solved in the present invention is to provide the switch power supply output circuit that a kind of output ripple is little.
The technical scheme is that, it is provided that a kind of switch power supply output circuit, including transformator T1, diode VD1, VD2, electric capacity C1, C2, C3, C4, C5, resistance R1, R2, R3; Described transformator T1 is provided with the first outfan and the second outfan; The Single port of described first outfan is connected with the anode of one end of electric capacity C1, diode VD1; The other end of described electric capacity C1 is connected with one end of resistance R1, and the other end of described resistance R1 is connected with one end of the negative electrode of diode VD1, diode C2; One end of described resistance R2, electric capacity C3 one end be connected with working power positive pole; The another port of described first outfan, electric capacity C2 the other end be all connected with common ground end; The other end of described resistance R2, electric capacity C3 the other end be all connected with common ground end; The Single port of described second outfan is connected with the anode of diode VD2, and the negative electrode of described diode VD2 is connected with one end of electric capacity C4, one end of electric capacity C5, one end of resistance R3, working power positive pole;The another port of described second outfan, the other end of electric capacity C4, the other end of resistance R3, electric capacity C5 the other end be all connected with common ground end; Described switch power supply output circuit also includes a ripple suppression circuit that can ripple be effectively filtered out, and described ripple suppression circuit is connected with electric capacity C2, resistance R2.
Described ripple suppression circuit includes inductance L1 and electric capacity C6, and one end of described electric capacity C6 is connected with one end of electric capacity C2, and the other end of described electric capacity C6 is connected with the other end of electric capacity C2; One end of described inductance L1 is connected with one end of electric capacity C2, and the other end of described inductance L1 is connected with one end of resistance R2.
Described ripple suppression circuit also includes common mode inductance LU1, and a described connecting line of common mode inductance LU1 one end is connected with the other end of inductance L1, and described another connecting line of common mode inductance LU1 one end is connected with the other end of electric capacity C2; A described connecting line of the common mode inductance LU1 other end is connected with one end of resistance R2, and described another connecting line of the common mode inductance LU1 other end is connected with the other end of resistance R2.
After adopting above structure, the present invention compared with prior art, has the advantage that
Switch power supply output circuit of the present invention also includes a ripple suppression circuit that can ripple be effectively filtered out, and described ripple suppression circuit is connected with electric capacity C2, resistance R2. Can effective filtering out differential mode interference by inductance L1, common mode inductance LU1 can effective filter out common mode disturbances, so that make the output ripple of Switching Power Supply less, can reach 100 millivolts, so that the power supply output quality of Switching Power Supply is higher.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of switch power supply output circuit of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
As it is shown in figure 1, one switch power supply output circuit of the present invention, including transformator T1, diode VD1, VD2, electric capacity C1, C2, C3, C4, C5, resistance R1, R2, R3; Described transformator T1 is provided with the first outfan and the second outfan; The Single port of described first outfan is connected with the anode of one end of electric capacity C1, diode VD1; The other end of described electric capacity C1 is connected with one end of resistance R1, and the other end of described resistance R1 is connected with one end of the negative electrode of diode VD1, diode C2; One end of described resistance R2, electric capacity C3 one end be connected with working power positive pole; The another port of described first outfan, electric capacity C2 the other end be all connected with common ground end; The other end of described resistance R2, electric capacity C3 the other end be all connected with common ground end; The Single port of described second outfan is connected with the anode of diode VD2, and the negative electrode of described diode VD2 is connected with one end of electric capacity C4, one end of electric capacity C5, one end of resistance R3, working power positive pole; The another port of described second outfan, the other end of electric capacity C4, the other end of resistance R3, electric capacity C5 the other end be all connected with common ground end; Described switch power supply output circuit also includes a ripple suppression circuit that can ripple be effectively filtered out, and described ripple suppression circuit is connected with electric capacity C2, resistance R2.
Described ripple suppression circuit includes inductance L1 and electric capacity C6, and one end of described electric capacity C6 is connected with one end of electric capacity C2, and the other end of described electric capacity C6 is connected with the other end of electric capacity C2; One end of described inductance L1 is connected with one end of electric capacity C2, and the other end of described inductance L1 is connected with one end of resistance R2.
Described ripple suppression circuit also includes common mode inductance LU1, and a described connecting line of common mode inductance LU1 one end is connected with the other end of inductance L1, and described another connecting line of common mode inductance LU1 one end is connected with the other end of electric capacity C2; A described connecting line of the common mode inductance LU1 other end is connected with one end of resistance R2, and described another connecting line of the common mode inductance LU1 other end is connected with the other end of resistance R2.
It is described as far as highly preferred embodiment of the present invention above, but is not to be construed as limitations on claims. The present invention is not limited only to above example, and its concrete structure allows to change. In every case the various changes made in the protection domain of independent claims of the present invention are all in protection scope of the present invention.
Claims (3)
1. a switch power supply output circuit, including transformator T1, diode VD1, VD2, electric capacity C1, C2, C3, C4, C5, resistance R1, R2, R3; Described transformator T1 is provided with the first outfan and the second outfan; The Single port of described first outfan is connected with the anode of one end of electric capacity C1, diode VD1; The other end of described electric capacity C1 is connected with one end of resistance R1, and the other end of described resistance R1 is connected with one end of the negative electrode of diode VD1, diode C2; One end of described resistance R2, electric capacity C3 one end be connected with working power positive pole; The another port of described first outfan, electric capacity C2 the other end be all connected with common ground end; The other end of described resistance R2, electric capacity C3 the other end be all connected with common ground end; The Single port of described second outfan is connected with the anode of diode VD2, and the negative electrode of described diode VD2 is connected with one end of electric capacity C4, one end of electric capacity C5, one end of resistance R3, working power positive pole; The another port of described second outfan, the other end of electric capacity C4, the other end of resistance R3, electric capacity C5 the other end be all connected with common ground end; It is characterized in that: described switch power supply output circuit also includes a ripple suppression circuit that can ripple be effectively filtered out, and described ripple suppression circuit is connected with electric capacity C2, resistance R2.
2. switch power supply output circuit according to claim 1, it is characterized in that: described ripple suppression circuit includes inductance L1 and electric capacity C6, one end of described electric capacity C6 is connected with one end of electric capacity C2, and the other end of described electric capacity C6 is connected with the other end of electric capacity C2; One end of described inductance L1 is connected with one end of electric capacity C2, and the other end of described inductance L1 is connected with one end of resistance R2.
3. switch power supply output circuit according to claim 2, it is characterized in that: described ripple suppression circuit also includes common mode inductance LU1, a described connecting line of common mode inductance LU1 one end is connected with the other end of inductance L1, and described another connecting line of common mode inductance LU1 one end is connected with the other end of electric capacity C2; A described connecting line of the common mode inductance LU1 other end is connected with one end of resistance R2, and described another connecting line of the common mode inductance LU1 other end is connected with the other end of resistance R2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610157917.1A CN105680676A (en) | 2016-03-18 | 2016-03-18 | Switching power supply output circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610157917.1A CN105680676A (en) | 2016-03-18 | 2016-03-18 | Switching power supply output circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105680676A true CN105680676A (en) | 2016-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610157917.1A Pending CN105680676A (en) | 2016-03-18 | 2016-03-18 | Switching power supply output circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN105680676A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112498163A (en) * | 2020-11-23 | 2021-03-16 | 深圳市雄富新能源科技有限公司 | Control circuit of high-performance power supply |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5528481A (en) * | 1994-02-01 | 1996-06-18 | Philips Electronics North America Corporation | Low noise multi-output and multi-resonant flyback converter for television power supplies |
| CN201726321U (en) * | 2010-02-05 | 2011-01-26 | 航天长峰朝阳电源有限公司 | AC/DC flat plate type multiplex output switching voltage-stabilized power supply |
| CN103023305A (en) * | 2012-12-21 | 2013-04-03 | 中国北车集团大连机车研究所有限公司 | Power source for display unit for driver of electric locomotive |
| CN103618327A (en) * | 2013-06-26 | 2014-03-05 | 许继集团有限公司 | Large power energy storage current transformer and main circuit thereof |
| CN204290762U (en) * | 2014-10-15 | 2015-04-22 | 武汉杭久电气有限公司 | Auxiliary insulating power supply in machine |
| CN205081684U (en) * | 2015-08-27 | 2016-03-09 | 郑州华力信息技术有限公司 | Turn over and swash power switching power supply that declines |
-
2016
- 2016-03-18 CN CN201610157917.1A patent/CN105680676A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5528481A (en) * | 1994-02-01 | 1996-06-18 | Philips Electronics North America Corporation | Low noise multi-output and multi-resonant flyback converter for television power supplies |
| CN201726321U (en) * | 2010-02-05 | 2011-01-26 | 航天长峰朝阳电源有限公司 | AC/DC flat plate type multiplex output switching voltage-stabilized power supply |
| CN103023305A (en) * | 2012-12-21 | 2013-04-03 | 中国北车集团大连机车研究所有限公司 | Power source for display unit for driver of electric locomotive |
| CN103618327A (en) * | 2013-06-26 | 2014-03-05 | 许继集团有限公司 | Large power energy storage current transformer and main circuit thereof |
| CN204290762U (en) * | 2014-10-15 | 2015-04-22 | 武汉杭久电气有限公司 | Auxiliary insulating power supply in machine |
| CN205081684U (en) * | 2015-08-27 | 2016-03-09 | 郑州华力信息技术有限公司 | Turn over and swash power switching power supply that declines |
Non-Patent Citations (1)
| Title |
|---|
| 彭克发，蔺玉珂: "《模拟电子技术》", 31 December 2011 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112498163A (en) * | 2020-11-23 | 2021-03-16 | 深圳市雄富新能源科技有限公司 | Control circuit of high-performance power supply |
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Application publication date: 20160615 |