CN107026571A - A kind of switching power unit - Google Patents
A kind of switching power unit Download PDFInfo
- Publication number
- CN107026571A CN107026571A CN201611215277.1A CN201611215277A CN107026571A CN 107026571 A CN107026571 A CN 107026571A CN 201611215277 A CN201611215277 A CN 201611215277A CN 107026571 A CN107026571 A CN 107026571A
- Authority
- CN
- China
- Prior art keywords
- diode
- electric capacity
- resistance
- resistor
- negative electrode
- 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.)
- Pending
Links
- 238000004804 winding Methods 0.000 claims abstract description 29
- 239000011324 bead Substances 0.000 claims abstract description 20
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 4
- 230000007935 neutral effect Effects 0.000 claims description 3
- 230000005855 radiation Effects 0.000 claims description 3
- 240000007320 Pinus strobus Species 0.000 claims 1
- 238000001914 filtration Methods 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 3
- 238000005070 sampling Methods 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000001131 transforming effect Effects 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
-
- 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
Abstract
A kind of switching power unit, including rectifier circuit, pulse transformer T, switch transistor T 1, secondary commutating circuit, first resistor R1, second resistance R2,3rd resistor R3, the 3rd electric capacity and control unit.Rectifier circuit includes：First diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4, the first electric capacity C1 and the second electric capacity C2.Pulse transformer T includes first side winding L1, iron core T and secondary side winding L2.Secondary commutating circuit includes the 5th diode D5, the first magnetic bead SC1, the 6th diode D6, the second magnetic bead SC2, the 4th electric capacity C4, the 4th resistance R4, inductance L and the 5th electric capacity C5.A kind of switching power unit that the present invention is provided, the characteristics of with can effectively suppress its own electromagnetic disturbance, can be applied to the electronic instrument or equipment of precision.
Description
Technical field
The present invention relates to a kind of switching power unit, belong to on-off circuit technical field
Background technology
In recent years, with the development of Power Electronic Technique, Switching Power Supply extensively should with small-sized, light weight and efficient feature
For industrial automatic control, military industry equipment, research equipment, LED illumination, industrial control equipment, communication apparatus, power equipment, instrument
The fields such as instrument.
But compared with linear power supply, realize that voltage becomes because Switching Power Supply is the high speed break-make using semiconductor devices
Change, and the time ratio turned on and off by controlling switch pipe, to maintain in regulated output voltage, therefore power circuit easily
Produce stronger conduction and electromagnetic radiation harassing and wrecking, not only can interference load, can also produce interference to other electronic equipments of surrounding,
Influence its use in precision instrument and equipment.
The content of the invention
The invention aims to overcome the deficiencies in the prior art there is provided a kind of switching power unit, can effectively it press down
The electromagnetic disturbance of its own is made, the electronic instrument or equipment of precision is can be applied to.
In order to solve the above-mentioned technical problem, the present invention is to be achieved through the following technical solutions：
A kind of switching power unit, including：Rectifier circuit, pulse transformer, switching tube, secondary commutating circuit, first resistor,
Second resistance, 3rd resistor, the 3rd electric capacity and control unit.One end connection pulse transforming of the output end of the rectifier circuit
The first winding of device, the emitter stage of other end connecting valve pipe；The colelctor electrode of switching tube connects the first winding of pulse transformer
The other end；The base stage of switching tube connects the output end of control unit；3rd electric capacity and 3rd resistor series connection, the 3rd electric capacity it is another
The colelctor electrode of one end connecting valve pipe, the emitter stage of the other end connecting valve pipe of 3rd resistor and ground connection；Pulse transformer
The input of secondary winding connecting secondary commutating circuit；First resistor and second resistance series connection, first resistor and second resistance
Tie point connects the input of control unit jointly；The other end connection inductance of first resistor and the 5th electric capacity；Second resistance it is another
One end is grounded.
The rectifier circuit includes：First diode, the second diode, the 3rd diode, the 4th diode, the first electricity
Hold and the second electric capacity.The anode of first diode is connected electric network source phase line L ends jointly with the negative electrode of the 3rd diode；Two or two
The negative electrode of the anode of pole pipe and the 4th diode is connected and the mains neutral line N-terminal that gets access to grid jointly；The negative electrode of first diode and
The negative electrode of second diode is connected and connected jointly one end of the first winding of pulse transformer；The anode of 4th diode and
The emitter stage of the connected and common connecting valve pipe of the anode of three diodes；The moon of the two ends of first electric capacity respectively with the first diode
Pole, the anode of the 4th diode are connected；First electric capacity is in parallel with the second electric capacity.
The pulse transformer includes：First side winding L1, iron core T and secondary side winding L2；First side winding L1 one end
It is connected with the negative electrode of the first diode, the first side winding L1 other ends are connected with the colelctor electrode of switch transistor T 1；Secondary side winding L2
One end is connected with the first magnetic bead SC1 one end, other end ground connection.
The secondary commutating circuit includes：5th diode, the first magnetic bead SC1, the 6th diode, the second magnetic bead SC2,
Four electric capacity, the 4th resistance, inductance L and the 5th electric capacity；4th electric capacity and the 4th resistant series, the two ends of the series arm respectively with
First magnetic bead SC1 one end and the connection of the 5th diode anode, can suppress surge voltage；5th diode cathode and the six or two pole
The negative electrode of pipe is connected and connects inductance L one end jointly；Second magnetic bead SC2 one end and the anode connection of the 6th diode, the
Two magnetic bead SC2 other end ground connection, can suppress the reverse surge current of the 5th diode；One end connection inductance of 5th electric capacity
The other end；The other end ground connection of 5th electric capacity；The filter network of 6th diode, inductance L and the formation of the 5th electric capacity, can reduce straight
Ripple in stream output.
The first resistor and second resistance constitute divider resistance.First resistor R1 and second resistance series connection, and with the 5th
Electric capacity is in parallel；The input connection of second resistance one end and control unit, other end ground connection；Pass through first resistor and the second electricity
Resistance, can be achieved the sampling to direct current output；According to the numerical value of sampling, the turn-on and turn-off of control unit regulation switch transistor T 1 when
Between compare, to control the value stabilization of direct current output in setting value, and then form negative-feedback.
The 3rd electric capacity C3 and 3rd resistor R3 series connection, the two ends of the series arm respectively with the colelctor electrode of switching tube and
The radiation of switching tube is extremely connected, and can absorb the surge voltage of switching tube turn-on and turn-off moment generation.
The second electric capacity C2 is a high frequency capacitance, to reduce high-frequency resistance, it is possible to reduce high frequency electric is with differential mode
Conduction interference caused by form.
4th electric capacity C4 and the 4th resistance the R4 series connection, can suppress surge voltage.
Compared with prior art, the beneficial effects of the invention are as follows：The invention provides a kind of switching power unit, with energy
The characteristics of effectively suppressing its own electromagnetic disturbance, can be applied to the electronic instrument or equipment of precision.
Brief description of the drawings
Fig. 1 is the apparatus structure schematic diagram of the present invention.
Embodiment
The embodiment of the present invention is as shown in Figure 1.
A kind of switching power unit of the present embodiment, including rectifier circuit, pulse transformer T, switch transistor T 1, secondary rectification
Loop, first resistor R1, second resistance R2,3rd resistor R3, the 3rd electric capacity C3 and control unit.
One end of the output end of rectifier circuit in the present embodiment connects the first winding of pulse transformer, and the other end connects
Connect the emitter stage of switch transistor T 1；The other end of the colelctor electrode connection pulse transformer T of switch transistor T 1 first winding；Switching tube
Base stage connects the output end of control unit；3rd electric capacity C3 and 3rd resistor R3 series connection, the 3rd electric capacity C3 other end connection is opened
Close pipe T1 colelctor electrode, 3rd resistor R3 other end connecting valve pipe T1 emitter stage and ground connection；3rd electric capacity C3 and the 3rd
Radiation of the two ends of the series arm of resistance R3 formation respectively with the colelctor electrode and switching tube of switching tube is extremely connected, and can absorb switch
The surge voltage that pipe turn-on and turn-off moment produces.
The input of the secondary winding L2 connecting secondary commutating circuits of pulse transformer T in the present embodiment；First resistor
R1 and second resistance R2 series connection, first resistor R1 and second resistance R2 tie point connect the output end of control unit jointly；First
Resistance R1 other end connection inductance L and the 5th electric capacity C5；Second resistance R2 other end ground connection.
Rectifier circuit in the present embodiment includes：First diode D1, the second diode D2, the 3rd diode D3,
Four diode D4, the first electric capacity C1 and the second electric capacity C2；The negative electrode of first diode D1 anode and the 3rd diode D3 is common
Connect electric network source phase line L ends；Second diode D2 anode and the 4th diode D4 negative electrode are connected and the electricity that gets access to grid jointly
Source neutral conductor N-terminal；First diode D1 negative electrode and the second diode D2 negative electrode are connected and connect pulse transformer T's jointly
First winding L1 one end；4th diode D4 anode and the 3rd diode D3 anode are connected and common connecting valve pipe T1
Emitter stage；Negative electrode, the 4th diode D4 anode of first electric capacity C1 two ends respectively with the first diode D1 are connected；First
Electric capacity C1 is in parallel with the second electric capacity C2.Second electric capacity C2 is a high frequency capacitance, to reduce high-frequency resistance, it is possible to reduce high frequency
Electric current is with the conduction interference caused by differential mode form.
The pulse transformer T includes：First side winding L1, iron core T and secondary side winding L2.First side winding L1 one end
It is connected with the first diode D1 negative electrode, the first side winding L1 other ends are connected with the colelctor electrode of switch transistor T 1；Secondary side winding
L2 one end is connected with the first magnetic bead SC1 one end, other end ground connection.
The secondary commutating circuit includes：5th diode D5, the first magnetic bead SC1, the 6th diode D6, the second magnetic bead
SC2, the 4th electric capacity C4, the 4th resistance R4, inductance L and the 5th electric capacity C5.4th electric capacity C4 and the 4th resistance R4 series connection, can suppress
Surge voltage；The two ends of the series arm are connected with the first magnetic bead SC1 one end and the 5th diode D5 anodes respectively, can also be pressed down
Surge voltage processed；5th diode D5 negative electrodes and the 6th diode D6 negative electrode are connected and connect inductance L one end jointly；Second
Magnetic bead SC2 one end and the 6th diode D6 anode connection, the second magnetic bead SC2 other end ground connection, can suppress diode D5
Reverse surge current；5th electric capacity C5 one end connects the other end of inductance；5th electric capacity C5 other end ground connection；Six or two
Pole pipe D6, inductance L and the filter network of the 5th electric capacity C5 formation, can reduce the ripple in direct current output.
The first resistor R1 and second resistance R2 constitute divider resistance.
Claims (7)
1. a kind of switching power unit, it is characterised in that described device includes：Rectifier circuit, pulse transformer, switching tube
T1, secondary commutating circuit, first resistor, second resistance, 3rd resistor, the 3rd electric capacity and control unit；Rectifier circuit it is defeated
The one end for going out end connects the first winding of pulse transformer, the emitter stage of other end connecting valve pipe；The colelctor electrode of switching tube connects
Connect the other end of the first winding of pulse transformer；The base stage of switching tube connects the output end of control unit；3rd electric capacity and
Three resistant series, the colelctor electrode of the other end connecting valve pipe of the 3rd electric capacity, the hair of the other end connecting valve pipe of 3rd resistor
Emitter-base bandgap grading is simultaneously grounded；The input of the secondary winding connecting secondary commutating circuit of pulse transformer；First resistor and second resistance string
The tie point of connection composition divider resistance, first resistor and second resistance connects the input of control unit jointly；First resistor it is another
One end connects inductance and the 5th electric capacity；The other end ground connection of second resistance.
2. a kind of switching power unit according to claim 1, it is characterised in that the rectifier circuit includes：First
Diode, the second diode, the 3rd diode, the 4th diode, the first electric capacity and the second electric capacity；The anode of first diode with
The negative electrode of 3rd diode connects electric network source phase line L ends jointly；The negative electrode phase of the anode of second diode and the 4th diode
Connect and the mains neutral line N-terminal that gets access to grid jointly；The negative electrode of the negative electrode of first diode and the second diode is connected and connected jointly
One end of the first winding of pulse transformer；The anode of 4th diode and the anode of the 3rd diode are connected and connection is opened jointly
Close the emitter stage of pipe；Negative electrode, the anode of the 4th diode of the two ends of first electric capacity respectively with the first diode are connected；First electricity
Hold in parallel with the second electric capacity；The exchange input Vin of electric network source is converted into direct current by rectifier circuit, and passes through the first electric capacity
After filtering, the primary side of pulse transformer is transferred to.
3. a kind of switching power unit according to claim 1, it is characterised in that the pulse transformer includes：Once
Side winding L1 and secondary side winding L2；First side winding L1 one end is connected with the negative electrode of the first diode, and first side winding L1 is another
One end is connected with the colelctor electrode of switching tube；Secondary side winding L2 one end is connected with the first magnetic bead SC1 one end, other end ground connection.
4. a kind of switching power unit according to claim 1, it is characterised in that the secondary commutating circuit includes：The
Five diodes, the first magnetic bead SC1, the 6th diode, the second magnetic bead SC2, the 4th electric capacity, the 4th resistance, inductance and the 5th electric capacity；
4th electric capacity and the 4th resistant series, the two ends of the series arm are positive with the first magnetic bead SC1 one end and the 5th diode respectively
Pole is connected, and can suppress surge voltage；The negative electrode of 5th diode and the negative electrode of the 6th diode are connected and connect inductance L's jointly
One end；Second magnetic bead SC2 one end and the anode connection of the 6th diode, the second magnetic bead SC2 other end ground connection can suppress two
The reverse surge current of pole pipe；One end of 5th electric capacity connects the other end of inductance；The other end ground connection of 5th electric capacity；Six or two
The filter network of pole pipe, inductance and the formation of the 5th electric capacity, can reduce the ripple in direct current output.
5. a kind of switching power unit according to claim 1, it is characterised in that the 3rd electric capacity and 3rd resistor string
Connection, the radiation of the two ends of the series arm respectively with the colelctor electrode and switching tube of switching tube is extremely connected, can absorb switching tube and turns on
The surge voltage produced with shutdown moment.
6. a kind of switching power unit according to claim 2, it is characterised in that first electric capacity strobes,
Second electric capacity is a high frequency capacitance, to reduce high-frequency resistance, it is possible to reduce high frequency electric is with caused by differential mode form
Conduction interference.
7. a kind of switching power unit according to claim 4, it is characterised in that the 4th electric capacity and the 4th resistance string
Connection, can suppress surge voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611215277.1A CN107026571A (en) | 2016-12-26 | 2016-12-26 | A kind of switching power unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611215277.1A CN107026571A (en) | 2016-12-26 | 2016-12-26 | A kind of switching power unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107026571A true CN107026571A (en) | 2017-08-08 |
Family
ID=59525997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611215277.1A Pending CN107026571A (en) | 2016-12-26 | 2016-12-26 | A kind of switching power unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107026571A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109004837A (en) * | 2018-07-13 | 2018-12-14 | 广州金升阳科技有限公司 | High voltage flyback converter |
| CN109742940A (en) * | 2018-12-17 | 2019-05-10 | 深圳和而泰智能控制股份有限公司 | Promote the method and detection device of electromagnetic oven coffee machine Electro Magnetic Compatibility |
| CN111355366A (en) * | 2018-12-24 | 2020-06-30 | 广东美的白色家电技术创新中心有限公司 | System for inhibiting conduction EMI (electro-magnetic interference) for switch tube and household appliance |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2362232Y (en) * | 1998-05-06 | 2000-02-02 | 青岛海信集团公司 | Switch power supply |
| TW200835128A (en) * | 2007-02-12 | 2008-08-16 | Innolux Display Corp | Switching power supply circuit |
| CN101944857A (en) * | 2009-06-17 | 2011-01-12 | 伟创力国际美国公司 | Adopt power to reduce the power adapters of device |
| CN202759383U (en) * | 2012-08-08 | 2013-02-27 | 张心益 | Switch power supply with high power factor |
| CN104200078A (en) * | 2014-08-22 | 2014-12-10 | 浪潮电子信息产业股份有限公司 | Method for restraining electromagnetic interference (EMI) |
| CN104488182A (en) * | 2012-07-26 | 2015-04-01 | 奥斯兰姆施尔凡尼亚公司 | Flyback AC-TO-DC converter |
| CN104852611A (en) * | 2015-05-15 | 2015-08-19 | 广州金升阳科技有限公司 | Switching power supply |
| CN105099201A (en) * | 2015-07-11 | 2015-11-25 | 青岛鼎信通讯股份有限公司 | Micro-power consumption single-ended flyback high-voltage power supply circuit |
| CN206894505U (en) * | 2016-12-26 | 2018-01-16 | 江西科晨高新技术发展有限公司 | A kind of switching power unit |
-
2016
- 2016-12-26 CN CN201611215277.1A patent/CN107026571A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2362232Y (en) * | 1998-05-06 | 2000-02-02 | 青岛海信集团公司 | Switch power supply |
| TW200835128A (en) * | 2007-02-12 | 2008-08-16 | Innolux Display Corp | Switching power supply circuit |
| CN101944857A (en) * | 2009-06-17 | 2011-01-12 | 伟创力国际美国公司 | Adopt power to reduce the power adapters of device |
| CN104488182A (en) * | 2012-07-26 | 2015-04-01 | 奥斯兰姆施尔凡尼亚公司 | Flyback AC-TO-DC converter |
| CN202759383U (en) * | 2012-08-08 | 2013-02-27 | 张心益 | Switch power supply with high power factor |
| CN104200078A (en) * | 2014-08-22 | 2014-12-10 | 浪潮电子信息产业股份有限公司 | Method for restraining electromagnetic interference (EMI) |
| CN104852611A (en) * | 2015-05-15 | 2015-08-19 | 广州金升阳科技有限公司 | Switching power supply |
| CN105099201A (en) * | 2015-07-11 | 2015-11-25 | 青岛鼎信通讯股份有限公司 | Micro-power consumption single-ended flyback high-voltage power supply circuit |
| CN206894505U (en) * | 2016-12-26 | 2018-01-16 | 江西科晨高新技术发展有限公司 | A kind of switching power unit |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109004837A (en) * | 2018-07-13 | 2018-12-14 | 广州金升阳科技有限公司 | High voltage flyback converter |
| CN109742940A (en) * | 2018-12-17 | 2019-05-10 | 深圳和而泰智能控制股份有限公司 | Promote the method and detection device of electromagnetic oven coffee machine Electro Magnetic Compatibility |
| CN111355366A (en) * | 2018-12-24 | 2020-06-30 | 广东美的白色家电技术创新中心有限公司 | System for inhibiting conduction EMI (electro-magnetic interference) for switch tube and household appliance |
| CN111355366B (en) * | 2018-12-24 | 2021-12-28 | 广东美的白色家电技术创新中心有限公司 | System for inhibiting conduction EMI (electro-magnetic interference) for switch tube and household appliance |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101621247B (en) | Power factor correction circuit | |
| CN201766507U (en) | High power factor constant current circuit | |
| US20230113753A1 (en) | Dc/dc converter and method for controlling output voltage thereof | |
| CN107546959A (en) | A kind of Switching Power Supply, electronic equipment and Switching Power Supply control method | |
| CN108365765A (en) | A kind of multiple-channel output single-end flyback switching power supply | |
| CN107026571A (en) | A kind of switching power unit | |
| CN104578820B (en) | A kind of high power density AC great current generator | |
| CN110365220B (en) | TLC resonant circuit and power converter applied by same | |
| CN206894505U (en) | A kind of switching power unit | |
| CN206992974U (en) | A kind of controlled type primary series connection secondary commutation parallel connection push rod power supply changeover device | |
| CN102810986B (en) | A kind of series topology LED switch power circuit | |
| CN204858973U (en) | Isolation feedback supply circuit of LLC resonant transformation ware | |
| CN202634839U (en) | Light emitting diode (LED) drive circuit and LED lighting lamp | |
| CN107846147A (en) | A kind of single input and multi-output DC DC switch converters | |
| CN207265870U (en) | A kind of synchronous rectification integral control circuit | |
| CN203590550U (en) | Large-power LED lamp realized by adopting voltage-isolated fly-back controller | |
| CN106685211A (en) | Switching power supply, electrical isolation method and ammeter | |
| CN205992856U (en) | Switching power supply and ammeter | |
| CN110048628A (en) | Seven level static current transformer of high reliability dual input | |
| CN105429452A (en) | Common-mode rejection dual-Boost bridgeless PFC converter | |
| CN209709951U (en) | Electric power converter and chip | |
| CN108023479A (en) | A kind of power converter circuit | |
| CN106505862A (en) | The insulating power supply of few element | |
| CN205864278U (en) | A kind of three phase electric machine universal power conditioner | |
| CN201726326U (en) | Half-bridge soft switching power source with passive power factor correcting circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170808 |