CN110266195A - A kind of circuit of reversed excitation - Google Patents
A kind of circuit of reversed excitation Download PDFInfo
- Publication number
- CN110266195A CN110266195A CN201910664651.3A CN201910664651A CN110266195A CN 110266195 A CN110266195 A CN 110266195A CN 201910664651 A CN201910664651 A CN 201910664651A CN 110266195 A CN110266195 A CN 110266195A
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- CN
- China
- Prior art keywords
- diode
- capacitor
- side winding
- winding
- vice
- 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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Links
- 230000005284 excitation Effects 0.000 title claims abstract description 11
- 238000004804 winding Methods 0.000 claims abstract description 63
- 239000003990 capacitor Substances 0.000 claims abstract description 37
- 230000005669 field effect Effects 0.000 claims abstract description 14
- 239000006096 absorbing agent Substances 0.000 claims abstract description 5
- 230000003447 ipsilateral effect Effects 0.000 claims abstract description 5
- 238000002955 isolation Methods 0.000 abstract description 6
- 230000005611 electricity Effects 0.000 description 5
- 230000004913 activation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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
Abstract
The present invention relates to a kind of circuit of reversed excitation, the port Vin connects the pole D of field-effect tube Q1, and the S of field-effect tube Q1 absorber extremely in parallel and primary side winding T1 are followed by input ground；Auxiliary winding T3 and primary side winding T1 are ipsilateral, the anode of top connection one D1 of diode of auxiliary winding T3, lower part connects the cathode of connection one D1 of diode after one C1 of capacitor, and the port Vcc, the indirect input ground of capacitor one C1 and auxiliary winding T3 are arranged between one C1 of one D1 of diode and capacitor；Vice-side winding T2 is arranged in the other side of primary side winding T1, and the anode of top connection two D2 of diode of vice-side winding T2 after two D2 of diode meets two C2 of capacitor, is connected to the lower part of vice-side winding T2, V is arranged between two C2 of two D2 of diode and capacitor0Port, the indirect output ground of two C2 of vice-side winding T2 and capacitor.Transformer port isolation of the present invention is easily handled, the transformer reliability under the conditions of comparable size improves, is particularly suitable for 3kV or more high voltage input occasion.
Description
Technical field
The present invention relates to electronic circuit technology field, especially a kind of transformer port isolation is easily handled, comparable size
Under the conditions of transformer reliability improve, be particularly suitable for 3kV or more high voltage input occasion circuit of reversed excitation.
Background technique
" flyback " (FLY BACK) is specific signified when switching tube is connected, and output transformer serves as inductance, and electric energy is converted into
Magnetic energy, at this time output loop no current；On the contrary, output transformer releases energy, and magnetic energy is converted into electricity when switching tube shutdown
Can, there is electric current in output loop.Inverse-excitation type switch power-supply refers to opening using flyback high frequency transformer isolation input output loop
Powered-down source, it is corresponding to have positive activation type Switching Power Supply.Flyback is specific signified when switching tube is connected, and output transformer serves as electricity
Sense, electric energy are converted into magnetic energy, at this time output loop no current;On the contrary, output transformer releases energy when switching tube shutdown,
Magnetic energy is converted into electric energy, has electric current in output loop.In inverse-excitation type switch power-supply, output transformer functions simultaneously as energy storage inductor,
Entire power volume is small, structure is simple, so being used widely.Using it is most be single-end flyback switching power supply.Advantage:
Component is few, and circuit is simple, at low cost, small in size, can the voltage drawback that is mutually isolated of output multi-channel simultaneously: switching tube bears electricity
Height is pressed, output transformer utilization factor is low, and discomfort cooperation large power supply EMI is bigger in general, the switch within 100W is electric
Source generallys use single-ended flyback, and the Switching Power Supply more than 100W-300W generallys use positive activation type or semibridge system, and 300W is to power on
Source generallys use full-bridge type.
In the prior art, transformer primary winding is above switching tube.Transformer include primary side winding, vice-side winding and
Six ports of totally three windings, traditional flyback are+4 low-pressure ports of 2 high pressure ports to Vcc auxiliary winding.Such as Fig. 2, port A electricity
Position dv/dt high belongs to high potential, this point needs to consider the abundant insulation with the port Vin and the port Vcc in design of transformer.
A kind of transformer port isolation is needed to be easily handled, the transformer reliability under the conditions of comparable size improves, especially
Circuit of reversed excitation suitable for 3kV or more high voltage input occasion.
Summary of the invention
The object of the present invention is to provide a kind of transformer port isolations to be easily handled, the transformer under the conditions of comparable size can
The circuit of reversed excitation of 3kV or more high voltage input occasion is improved, is particularly suitable for by property.
A kind of circuit of reversed excitation, comprising:
The port Vin, the pole D of the port Vin connection field-effect tube Q1, the S of field-effect tube Q1 absorber extremely in parallel and primary side around
Group T1 is followed by input ground；
Auxiliary winding T3, the auxiliary winding T3 and primary side winding T1 are ipsilateral, and the top of the auxiliary winding T3 connects diode
The anode of one D1, lower part connect the cathode that one D1 of diode is connected after one C1 of capacitor, one D1 of diode and one C1 of capacitor it
Between the port Vcc is set, the indirect input of one C1 of capacitor and auxiliary winding T3；
Vice-side winding T2 is arranged in the other side of the primary side winding T1, top connection two D2's of diode of the vice-side winding T2
Anode after two D2 of diode meets two C2 of capacitor, is connected to the lower part of vice-side winding T2, two D2 of diode and capacitor two
V is set between C20Port, the indirect output ground of two C2 of the vice-side winding T2 and capacitor.
The anode of one D1 connection capacitor of diode, one C1.
The anode of two D2 connection capacitor of diode, two C2.
The pole D of connection field-effect tube Q1 in the port Vin of the present invention, the S of field-effect tube Q1 absorber extremely in parallel and primary side winding
T1 is followed by input ground；Auxiliary winding T3 and primary side winding T1 are ipsilateral, the anode of top connection one D1 of diode of auxiliary winding T3,
Lower part connects the cathode of connection one D1 of diode after one C1 of capacitor, and the port Vcc, electricity are arranged between one C1 of one D1 of diode and capacitor
Hold the indirect input ground of a C1 and auxiliary winding T3；Vice-side winding T2 is arranged in the other side of primary side winding T1, vice-side winding T2's
The anode of top connection two D2 of diode is connected to the lower part of vice-side winding T2, diode after two D2 of diode meets two C2 of capacitor
V is set between two C2 of two D2 and capacitor0Port, the indirect output ground of two C2 of vice-side winding T2 and capacitor.Transformer terminal of the present invention
Mouth insulation is easily handled, the transformer reliability under the conditions of comparable size improves, is particularly suitable for 3kV or more high voltage input field
It closes.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the structural schematic diagram of the prior art of the present invention；
In figure: Q1 is field-effect tube, and G is the pole G of field-effect tube Q1, and D is the pole D of field-effect tube Q1, and S is the S of field-effect tube Q1
Pole, A are port, and T1 is primary side winding, and T2 is vice-side winding, and T3 is auxiliary winding, and D1 is diode one, and D2 is diode two,
C1 is capacitor one, and C2 is capacitor two.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
A kind of circuit of reversed excitation, comprising: the port Vin, the port Vin connect the pole D of field-effect tube Q1, the pole S of field-effect tube Q1
Absorber in parallel and primary side winding T1 are followed by input ground；Auxiliary winding T3, auxiliary winding T3 and primary side winding T1 are ipsilateral, auxiliary around
The anode of top connection one D1 of diode of group T3, lower part connects the cathode of connection one D1 of diode after one C1 of capacitor, diode
The port Vcc, the indirect input ground of capacitor one C1 and auxiliary winding T3 are set between one C1 of one D1 and capacitor；Primary side winding T1's is another
Vice-side winding T2, the anode of top connection two D2 of diode of vice-side winding T2 is arranged in side, and two D2 of diode meets two C2 of capacitor
Afterwards, it is connected to the lower part of vice-side winding T2, V is set between two C2 of two D2 of diode and capacitor0Port, vice-side winding T2 and capacitor
The indirect output ground of two C2.
The anode of one D1 connection capacitor of diode, one C1.The anode of two D2 connection capacitor of diode, two C2.
Transformer primary winding T1 is above switching tube.Transformer includes primary side winding T1, vice-side winding T2 and VCC auxiliary
Six ports of totally three windings winding T3, are that 1 high pressure port adds 5 low-pressure ports.Transformer port isolation is easily handled.Together
Transformer reliability under the conditions of equidimension improves.It is particularly suitable for 3kV or more high voltage input occasion.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe originals of the invention
Reason, various changes and improvements may be made to the invention without departing from the spirit and scope of the present invention, these changes and improvements
It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (3)
1. a kind of circuit of reversed excitation characterized by comprising
The port Vin, the pole D of the port Vin connection field-effect tube Q1, the S of field-effect tube Q1 absorber extremely in parallel and primary side around
Group T1 is followed by input ground；
Auxiliary winding T3, the auxiliary winding T3 and primary side winding T1 are ipsilateral, and the top of the auxiliary winding T3 connects diode
The anode of one D1, lower part connect the cathode that one D1 of diode is connected after one C1 of capacitor, one D1 of diode and one C1 of capacitor it
Between the port Vcc is set, the indirect input of one C1 of capacitor and auxiliary winding T3；
Vice-side winding T2 is arranged in the other side of the primary side winding T1, top connection two D2's of diode of the vice-side winding T2
Anode after two D2 of diode meets two C2 of capacitor, is connected to the lower part of vice-side winding T2, two D2 of diode and capacitor two
V is set between C20Port, the indirect output ground of two C2 of the vice-side winding T2 and capacitor.
2. a kind of circuit of reversed excitation according to claim 1, which is characterized in that one D1 connection capacitor of diode, one C1's
Anode.
3. a kind of circuit of reversed excitation according to claim 1, which is characterized in that two D2 connection capacitor of diode, two C2's
Anode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910664651.3A CN110266195A (en) | 2019-07-23 | 2019-07-23 | A kind of circuit of reversed excitation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910664651.3A CN110266195A (en) | 2019-07-23 | 2019-07-23 | A kind of circuit of reversed excitation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110266195A true CN110266195A (en) | 2019-09-20 |
Family
ID=67927766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910664651.3A Pending CN110266195A (en) | 2019-07-23 | 2019-07-23 | A kind of circuit of reversed excitation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110266195A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080043497A1 (en) * | 2006-08-15 | 2008-02-21 | Delta Electronics, Inc. | Flyback converter with synchronous rectifier |
| CN101771353A (en) * | 2010-02-24 | 2010-07-07 | 英飞特电子（杭州）有限公司 | Auxiliary source circuit for switch power supply |
| CN101867295A (en) * | 2010-03-16 | 2010-10-20 | 成都芯源系统有限公司 | Circuit and control method |
| CN102170232A (en) * | 2011-03-23 | 2011-08-31 | 上海新进半导体制造有限公司 | Self-driven active buffer and flyback switching mode power supply |
| CN203416169U (en) * | 2013-08-07 | 2014-01-29 | 深圳麦格米特电气股份有限公司 | Flyback power supply circuit |
| CN103973124A (en) * | 2014-05-15 | 2014-08-06 | 广州市特种机电设备检测研究院 | Method for designing intrinsic safety type quasi-resonance flyback converter |
| CN104218806A (en) * | 2014-08-18 | 2014-12-17 | 广州金升阳科技有限公司 | Method and circuit for controlling fly-back switching power supplies of zero-voltage switches |
| CN107276374A (en) * | 2017-06-26 | 2017-10-20 | 广州金升阳科技有限公司 | A kind of asymmetrical half-bridge flyback drive circuit |
| CN107769575A (en) * | 2017-11-28 | 2018-03-06 | 苏州汇川技术有限公司 | Inverse-excitation type switch power-supply circuit |
| CN108155799A (en) * | 2016-12-06 | 2018-06-12 | 台达电子企业管理（上海）有限公司 | For the control method and control device of flyback converter circuit |
| CN210246608U (en) * | 2019-07-23 | 2020-04-03 | 上海麟荣电子技术有限公司 | Flyback circuit |
-
2019
- 2019-07-23 CN CN201910664651.3A patent/CN110266195A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080043497A1 (en) * | 2006-08-15 | 2008-02-21 | Delta Electronics, Inc. | Flyback converter with synchronous rectifier |
| CN101771353A (en) * | 2010-02-24 | 2010-07-07 | 英飞特电子（杭州）有限公司 | Auxiliary source circuit for switch power supply |
| CN101867295A (en) * | 2010-03-16 | 2010-10-20 | 成都芯源系统有限公司 | Circuit and control method |
| CN102170232A (en) * | 2011-03-23 | 2011-08-31 | 上海新进半导体制造有限公司 | Self-driven active buffer and flyback switching mode power supply |
| CN203416169U (en) * | 2013-08-07 | 2014-01-29 | 深圳麦格米特电气股份有限公司 | Flyback power supply circuit |
| CN103973124A (en) * | 2014-05-15 | 2014-08-06 | 广州市特种机电设备检测研究院 | Method for designing intrinsic safety type quasi-resonance flyback converter |
| CN104218806A (en) * | 2014-08-18 | 2014-12-17 | 广州金升阳科技有限公司 | Method and circuit for controlling fly-back switching power supplies of zero-voltage switches |
| CN108155799A (en) * | 2016-12-06 | 2018-06-12 | 台达电子企业管理（上海）有限公司 | For the control method and control device of flyback converter circuit |
| CN107276374A (en) * | 2017-06-26 | 2017-10-20 | 广州金升阳科技有限公司 | A kind of asymmetrical half-bridge flyback drive circuit |
| CN107769575A (en) * | 2017-11-28 | 2018-03-06 | 苏州汇川技术有限公司 | Inverse-excitation type switch power-supply circuit |
| CN210246608U (en) * | 2019-07-23 | 2020-04-03 | 上海麟荣电子技术有限公司 | Flyback circuit |
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