CN106100332A - A kind of self-adaption switch electric power source flow equalizing circuit - Google Patents
A kind of self-adaption switch electric power source flow equalizing circuit Download PDFInfo
- Publication number
- CN106100332A CN106100332A CN201610411594.4A CN201610411594A CN106100332A CN 106100332 A CN106100332 A CN 106100332A CN 201610411594 A CN201610411594 A CN 201610411594A CN 106100332 A CN106100332 A CN 106100332A
- Authority
- CN
- China
- Prior art keywords
- circuit
- outfan
- voltage follower
- input
- resistance
- 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
- 238000005070 sampling Methods 0.000 claims abstract description 13
- 230000005611 electricity Effects 0.000 claims description 12
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000004899 motility Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification 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
- H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
- H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
- H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Amplifiers (AREA)
Abstract
The present invention relates to a kind of self-adaption switch electric power source flow equalizing circuit, including the first voltage follower circuit, anti-phase scaling circuit, proportional plus integral control circuit, second voltage follower circuit and current-sharing protection circuit, the input of described first voltage follower circuit is connected with output current sampling circuit, the inverted scaling circuit of its outfan respectively with proportional plus integral control circuit, the input of the second voltage follower circuit is connected, the outfan of the second voltage follower circuit is connected with the input of proportional plus integral control circuit, the outfan of proportional plus integral control circuit is connected with controlling loop, the input of described current-sharing protection circuit and the input of the second voltage follower circuit are connected, its outfan is connected with current equalizing bus bar.Flow equalizing circuit low cost of the present invention, reliability is high, and adjustability is good, and capacity of resisting disturbance is strong.
Description
Technical field
The present invention relates to switch power technology field, be specifically related to a kind of self-adaption switch electric power source flow equalizing circuit.
Background technology
In the use of Switching Power Supply, in order to meet the requirements such as some power, volume, motility, used in parallel increasingly
Important, so will certainly use equalizing control circuit.At present in the design of the equalizing control circuit of Switching Power Supply, use chip
More, that such as TI company produces UC1902 series.Although this sharing control chip is easy to use, circuit is simple, but
It being the highest UC1902(-55 DEG C～+125 DEG C of temperature grade) procurement cycle is long, and it is difficult to buying, and UC2902 and UC1902
Temperature grade can not meet in some cases power supply use environment.And the circuit of current-sharing chip internal is solidification, the later stage
Cannot debug, and can only change chip during fault, cost is the biggest.Sharing control chip simply meets basic sharing control merit
Can, but functions expanding and anti-interference on do not deal with.
Summary of the invention
It is an object of the invention to provide a kind of self-adaption switch electric power source flow equalizing circuit, this circuit cost is low, and reliability is high,
Adjustability is good, and capacity of resisting disturbance is strong.
For achieving the above object, present invention employs techniques below scheme:
A kind of self-adaption switch electric power source flow equalizing circuit, including the first voltage follower circuit, anti-phase scaling circuit, proportional integral
Control circuit, the second voltage follower circuit and current-sharing protection circuit, the input of described first voltage follower circuit and output electricity
Stream sample circuit be connected, the inverted scaling circuit of its outfan respectively with proportional plus integral control circuit, the second voltage follow
The input of circuit is connected, and the outfan of the second voltage follower circuit is connected with the input of proportional plus integral control circuit, ratio
The outfan of integral control circuit is connected with controlling loop, the input of described current-sharing protection circuit and the second voltage follower circuit
Input be connected, its outfan is connected with current equalizing bus bar.
Described first voltage follower circuit uses voltage follower N1, and the input in the same direction of described voltage follower N1 is with defeated
Going out current sampling circuit to be connected, its outfan is connected with the input of anti-phase scaling circuit.
Described anti-phase scaling circuit uses operational amplifier N2, and the input in the same direction of described operational amplifier N2 is through electricity
Resistance R3 ground connection, its reverse input end is connected through the outfan of resistance R1 and the first voltage follower circuit, and its outfan is as anti-phase
The outfan of scaling circuit.
Described second voltage follower circuit uses voltage follower N3, and the input in the same direction of described voltage follower N3 is through electricity
Resistance R4 be connected with the outfan of anti-phase scaling circuit, and this in the same direction input successively through resistance R2, electric capacity C1 ground connection, voltage
The outfan of follower N3 is connected with proportional plus integral control circuit through resistance R6.
Described proportional plus integral control circuit includes operational amplifier N4, resistance R7, electric capacity C2, electric capacity C3 and diode V1,
The in-phase input end of described operational amplifier N4 is connected through the outfan of resistance R5 with anti-phase scaling circuit, and this homophase inputs
End is also connected with power supply through resistance R11, and the reverse input end of operational amplifier N4 is through resistance R6 and the second voltage follower circuit
Outfan is connected, and the outfan of described operational amplifier N4 is connected with its reverse input end through resistance R7, electric capacity C2 successively, described
The anode of diode V1 is connected with sharing control loop, and its negative electrode is connected with the outfan of operational amplifier N4, described electric capacity C3
One end be connected at the node between diode V1 and resistance R7, the reverse input end phase of its other end and operational amplifier N4
Even.
Described current-sharing protection circuit includes common mode inductance L, relay K, audion Q2, diode V2 and diode V3, institute
The input stating common mode inductance L is connected with current equalizing bus bar, and its outfan is connected with wherein two stationary contacts of relay K, relay K
Other two stationary contacts be connected with outfan, the earth terminal of electric capacity C1 of the second voltage follower circuit respectively, described diode V2
Anode be connected with the coil negative pole end of relay K, its negative electrode is connected with the coil electrode end of relay K, described audion Q2
Colelctor electrode be connected with the coil negative pole end of relay K, its base stage is connected with the anode of diode V3, its grounded emitter, institute
The negative electrode stating diode V3 is connected with output voltage sampling circuit through resistance R8, and the negative electrode of described diode V3 is through electric capacity C4 and three
The emitter stage of pole pipe Q2 is connected, and the base stage of audion Q2 is connected through the emitter stage of resistance R9 with audion Q2.
As shown from the above technical solution, self-adaption switch electric power source flow equalizing circuit low cost of the present invention, reliability is high,
Adjustability is good, and capacity of resisting disturbance is strong.This current-sharing protection circuit use common mode inductance L, relay K, audion Q2, diode V2 and
Diode V3 is constituted, when switch power parallel uses, when a certain power supply is due to self reason, brownout, it is impossible to drive
During audion Q2 conducting, relay not adhesive, so, the bus of this power supply does not connects with other power supplys, does not affect other power supplys
Flow equalizing function, improve the reliability of this flow equalizing circuit.Two contacts of the relay in circuit respectively with common mode inductance two
End is connected, for eliminating the interference altered on current equalizing bus bar, to improve the capacity of resisting disturbance of circuit.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the present invention.
Detailed description of the invention
The present invention will be further described below in conjunction with the accompanying drawings:
As it is shown in figure 1, the self-adaption switch electric power source flow equalizing circuit of the present embodiment, including the first voltage follower circuit 1, anti-phase ratio
Amplifying circuit 2, proportional plus integral control circuit the 3, second voltage follower circuit 4 and current-sharing protection circuit 5, the first voltage follower circuit
The input of 1 with output current sampling circuit be connected, the inverted scaling circuit of its outfan 2 respectively with proportional plus integral control
The input of circuit the 3, second voltage follower circuit 4 is connected, the outfan of the second voltage follower circuit 4 and proportional plus integral control electricity
The input on road 3 is connected, and the outfan of proportional plus integral control circuit 3 is connected with controlling loop, the input of current-sharing protection circuit 5
Being connected with the input of the second voltage follower circuit 4, its outfan is connected with current equalizing bus bar.
First voltage follower circuit 1 uses input in the same direction and the output electric current of voltage follower N1, voltage follower N1
Sample circuit is connected, and its outfan is connected with the input of anti-phase scaling circuit 2.This first voltage follower circuit 1, is used for
The output current sampling signal of power supply delivered in the anti-phase scaling circuit 2 of rear class, and buffering can be played, isolate
Effect so that the anti-phase scaling circuit 2 of rear class can preferably work, and does not affect the sampled current signals of prime.
Anti-phase scaling circuit 2 uses the input in the same direction of operational amplifier N2, operational amplifier N2 to connect through resistance R3
Ground, its reverse input end is connected through the outfan of resistance R1 with voltage follower N1, and its outfan is as anti-phase scaling electricity
The outfan on road 2.Because output current sampling signal magnitude of voltage is the lowest, and it is a negative voltage, by the first voltage follower circuit 1
The most constant, and be a negative voltage, it is unfavorable for process below.The present embodiment, will after anti-phase scaling circuit 2
Output current sampling signal zooms into a rational positive voltage, it is simple to the process of circuit below.
Second voltage follower circuit 4 use the input in the same direction of voltage follower N3, voltage follower N3 through resistance R4 with
The outfan of operational amplifier N2 be connected, and this in the same direction input successively through resistance R2, electric capacity C1 ground connection, voltage follower N3's
Outfan is connected with proportional plus integral control circuit 3 through resistance R6.This second voltage follower circuit 4 and first voltage follower circuit 1
Function similar, be all that the output current sampling signal of power supply is delivered in the scaling circuit of rear class, and can rise
To buffering, the effect of isolation so that the scaling circuit of rear class can preferably work, and does not affect the sample rate current of prime
Signal.
Proportional plus integral control circuit 3 includes operational amplifier N4, resistance R7, electric capacity C2, electric capacity C3 and diode V1, computing
The in-phase input end of amplifier N4 is connected through the outfan of resistance R5 with operational amplifier N2, this in-phase input end through resistance
R11 is connected with power supply, and the reverse input end of operational amplifier N4 is connected through the outfan of resistance R6 with voltage follower N3, computing
The outfan of amplifier N4 is connected with its reverse input end through resistance R7, electric capacity C2 successively, the anode of diode V1 and current-sharing control
Loop processed is connected, and its negative electrode is connected with the outfan of operational amplifier N4, and one end of electric capacity C3 is connected to diode V1 and resistance
At node between R7, its other end is connected with the reverse input end of operational amplifier N4.This proportional plus integral control circuit is whole
The core of individual equalizing control circuit, the loop being controlled power supply by this circuit controls to export electric current, plays the effect of current-sharing.Tool
Body is in fact the most i.e.: when several power sources in parallel use, and when the electric current of a wherein power supply is on the low side, illustrates that its busbar voltage is on the low side, fortune
The outfan calculating amplifier N4 drags down the feedback voltage controlling loop by diode V1, and then makes dutycycle increase, output electricity
Pressure increases, and output electric current increases.
Current-sharing protection circuit 5 includes common mode inductance L, relay K, audion Q2, diode V2 and diode V3, common mode electricity
The input of sense L is connected with current equalizing bus bar, and its outfan is connected with wherein two stationary contacts of relay K, other the two of relay K
Stationary contact is connected with outfan, the earth terminal of electric capacity C1 of the second voltage follower circuit 4 respectively, the anode of diode V2 and relay
The coil negative pole end of device K is connected, and its negative electrode is connected with the coil electrode end of relay K, the colelctor electrode of audion Q2 and relay K
Coil negative pole end be connected, its base stage is connected with the anode of diode V3, its grounded emitter, and the negative electrode of diode V3 is through resistance
R8 is connected with output voltage sampling circuit, and the negative electrode of diode V3 is connected through the emitter stage of electric capacity C4 with audion Q2, audion
The base stage of Q2 is connected through the emitter stage of resistance R9 with audion Q2.Two contacts of this relay K respectively with common mode inductance L two ends
It is connected, for eliminating the interference altered on current equalizing bus bar, when switch power parallel uses, when a certain power supply is due to self
Reason, brownout, it is impossible to drive audion Q2 conducting, relay K can not adhesive, make the bus of this power supply not with other power supplys
Connect, do not affect the flow equalizing function of other power supplys, thus improve the reliability of self-adaption switch electric power source flow equalizing circuit.
The output electric current of power supply obtains the sampled voltage signal of an output electric current, this voltage signal by current transformer
It is a relatively low negative voltage signal, is input to 3 feet of voltage follower N1, the 1 foot output voltage signal of voltage follower N1
Identical with 3 feet, 1 foot of voltage follower N1 receives 13 feet of operational amplifier N2, anti-phase scaling circuit 2 through resistance R1
Output current sampling signal zooms into a rational positive voltage, and the 14 foot output voltages of operational amplifier N2 are-R10/R1
Output current sample voltage again.When the output voltage of power supply is normal, audion Q2 turns on, relay K adhesive after conducting, all
Stream bus-receive ground by common mode inductance L, current equalizing bus bar and common mode inductance L receive 10 feet of voltage follower N3, voltage follow
8 feet of device N3 receive 6 feet of operational amplifier N4 by resistance R6, and proportional plus integral control circuit 3 passes through comparator/operational amplifier
5 feet of N4 and 6 foot voltages regulate the control loop of power supply, during if several power sources in parallel use, when the electricity of a wherein power supply
When flowing on the low side, illustrating that its busbar voltage is on the low side, the outfan of operational amplifier N4 is dragged down by diode V1 and controls the anti-of loop
Feedthrough voltage, and then make dutycycle increase, output voltage increases, and output electric current increases, and then makes the output electric current of every power supply
Roughly equal.
Embodiment described above is only to be described the preferred embodiment of the present invention, the not model to the present invention
Enclose and be defined, on the premise of designing spirit without departing from the present invention, the those of ordinary skill in the art technical side to the present invention
Various deformation that case is made and improvement, all should fall in the protection domain that claims of the present invention determines.
Claims (6)
1. a self-adaption switch electric power source flow equalizing circuit, it is characterised in that: include the first voltage follower circuit (1), anti-phase ratio
Amplifying circuit (2), proportional plus integral control circuit (3), the second voltage follower circuit (4) and current-sharing protection circuit (5), described first
The input of voltage follower circuit (1) is connected with output current sampling circuit, the inverted scaling circuit of its outfan (2) point
It is not connected with the input of proportional plus integral control circuit (3), the second voltage follower circuit (4), the second voltage follower circuit (4)
Outfan is connected with the input of proportional plus integral control circuit (3), the outfan of proportional plus integral control circuit (3) and control loop
Being connected, the input of described current-sharing protection circuit (5) and the input of the second voltage follower circuit (4) are connected, its outfan and
Current equalizing bus bar is connected.
Self-adaption switch electric power source flow equalizing circuit the most according to claim 1, it is characterised in that: described first voltage follow electricity
Road (1) uses voltage follower N1, the input in the same direction of described voltage follower N1 to be connected with output current sampling circuit, and it is defeated
Go out end to be connected with the input of anti-phase scaling circuit (2).
Self-adaption switch electric power source flow equalizing circuit the most according to claim 1, it is characterised in that: described anti-phase scaling electricity
Road (2) use operational amplifier N2, the input in the same direction of described operational amplifier N2 through resistance R3 ground connection, its reverse input end warp
The outfan of resistance R1 and the first voltage follower circuit (1) is connected, and its outfan is as the output of anti-phase scaling circuit (2)
End.
Self-adaption switch electric power source flow equalizing circuit the most according to claim 1, it is characterised in that: described second voltage follow electricity
Road (4) uses voltage follower N3, and the input in the same direction of described voltage follower N3 is through resistance R4 and anti-phase scaling circuit
(2) outfan be connected, and this in the same direction input successively through resistance R2, electric capacity C1 ground connection, the outfan warp of voltage follower N3
Resistance R6 is connected with proportional plus integral control circuit (3).
Self-adaption switch electric power source flow equalizing circuit the most according to claim 1, it is characterised in that: described proportional plus integral control electricity
Road (3) includes operational amplifier N4, resistance R7, electric capacity C2, electric capacity C3 and diode V1, and the homophase of described operational amplifier N4 is defeated
Enter end to be connected through the outfan of resistance R5 with anti-phase scaling circuit (2), this in-phase input end through resistance R11 and power supply phase
Even, the reverse input end of operational amplifier N4 is connected through the outfan of resistance R6 and the second voltage follower circuit (4), described computing
The outfan of amplifier N4 is connected with its reverse input end through resistance R7, electric capacity C2 successively, and the anode of described diode V1 is with equal
Flow control loop is connected, and its negative electrode is connected with the outfan of operational amplifier N4, and one end of described electric capacity C3 is connected to diode
At node between V1 and resistance R7, its other end is connected with the reverse input end of operational amplifier N4.
Self-adaption switch electric power source flow equalizing circuit the most according to claim 1, it is characterised in that: described current-sharing protection circuit
(5) include common mode inductance L, relay K, audion Q2, diode V2 and diode V3, the input of described common mode inductance L with
Current equalizing bus bar be connected, its outfan is connected with wherein two stationary contacts of relay K, other two stationary contacts of relay K respectively with
The outfan of the second voltage follower circuit (4), the earth terminal of electric capacity C1 are connected, the anode of described diode V2 and relay K
Coil negative pole end is connected, and its negative electrode is connected with the coil electrode end of relay K, the colelctor electrode of described audion Q2 and relay K
Coil negative pole end be connected, its base stage is connected with the anode of diode V3, its grounded emitter, the negative electrode warp of described diode V3
Resistance R8 is connected with output voltage sampling circuit, and the negative electrode of described diode V3 is through the emitter stage phase of electric capacity C4 and audion Q2
Even, the base stage of audion Q2 is connected through the emitter stage of resistance R9 with audion Q2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610411594.4A CN106100332A (en) | 2016-06-12 | 2016-06-12 | A kind of self-adaption switch electric power source flow equalizing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610411594.4A CN106100332A (en) | 2016-06-12 | 2016-06-12 | A kind of self-adaption switch electric power source flow equalizing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106100332A true CN106100332A (en) | 2016-11-09 |
Family
ID=57845174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610411594.4A Pending CN106100332A (en) | 2016-06-12 | 2016-06-12 | A kind of self-adaption switch electric power source flow equalizing circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106100332A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107976641A (en) * | 2017-11-16 | 2018-05-01 | 郑州云海信息技术有限公司 | A kind of method tested verification Switching Power Supply multiphase and flowed |
| CN108241093A (en) * | 2017-12-28 | 2018-07-03 | 中国电子产品可靠性与环境试验研究所 | Measuring device and data processing method for filter capacitance of switching power supply |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202856595U (en) * | 2012-07-06 | 2013-04-03 | 南京志卓电子科技有限公司 | Switching power supply parallel operation flow rectifier |
| CN103427600A (en) * | 2013-08-28 | 2013-12-04 | 上海斐讯数据通信技术有限公司 | Automatic current-sharing circuit of average current of switching power supply |
| US20140346878A1 (en) * | 2013-05-21 | 2014-11-27 | Renesas Electronics Corporation | Semiconductor integrated circuit and operating method thereof |
| CN205725459U (en) * | 2016-06-12 | 2016-11-23 | 合肥华耀电子工业有限公司 | A kind of self-adaption switch electric power source flow equalizing circuit |
-
2016
- 2016-06-12 CN CN201610411594.4A patent/CN106100332A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202856595U (en) * | 2012-07-06 | 2013-04-03 | 南京志卓电子科技有限公司 | Switching power supply parallel operation flow rectifier |
| US20140346878A1 (en) * | 2013-05-21 | 2014-11-27 | Renesas Electronics Corporation | Semiconductor integrated circuit and operating method thereof |
| CN103427600A (en) * | 2013-08-28 | 2013-12-04 | 上海斐讯数据通信技术有限公司 | Automatic current-sharing circuit of average current of switching power supply |
| CN205725459U (en) * | 2016-06-12 | 2016-11-23 | 合肥华耀电子工业有限公司 | A kind of self-adaption switch electric power source flow equalizing circuit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107976641A (en) * | 2017-11-16 | 2018-05-01 | 郑州云海信息技术有限公司 | A kind of method tested verification Switching Power Supply multiphase and flowed |
| CN108241093A (en) * | 2017-12-28 | 2018-07-03 | 中国电子产品可靠性与环境试验研究所 | Measuring device and data processing method for filter capacitance of switching power supply |
| CN108241093B (en) * | 2017-12-28 | 2020-07-31 | 中国电子产品可靠性与环境试验研究所 | Measuring device and data processing method of switching power supply filter capacitor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103151910B (en) | Undervoltage protection circuit, under-voltage protection method and switching power supply | |
| CN203798886U (en) | Current sampling circuit | |
| CN102915069B (en) | Overcurrent protection circuit of low dropout linear voltage stabilizer | |
| CN204131210U (en) | Power supply switch circuit and portable electric appts | |
| CN203481783U (en) | Short circuit and overcurrent protection circuit and mass production test equipment | |
| CN204316176U (en) | A kind of management system of dual power supply | |
| CN105703614A (en) | Anti-reverse-connection and anti-backward-flow protective circuit | |
| CN104215882B (en) | Voltage sag source locating method based on active single-port network resistor polarity | |
| CN104360143A (en) | Load zero crossing point detection circuit and method and load voltage detection circuit and method | |
| CN104184111B (en) | Overvoltage protection circuit for high-voltage transmission line ground wire power getting | |
| CN205725459U (en) | A kind of self-adaption switch electric power source flow equalizing circuit | |
| CN107241018A (en) | A kind of Width funtion input turns low-voltage high-power output circuit and method | |
| CN106100332A (en) | A kind of self-adaption switch electric power source flow equalizing circuit | |
| CN103337841A (en) | Bidirectional current limiter based on bidirectional BUCK converter and bidirectional current limiting method thereof | |
| CN103236679B (en) | Exchange breaker electronic type standby protector | |
| CN205353827U (en) | Current -sharing control circuit and electrical power generating system | |
| CN105098720A (en) | Protection circuit of pulse frequency modulation (PFM) boost power conversion circuit | |
| CN108037787A (en) | A kind of A/D chip input voltages limiter protection circuit | |
| CN203632226U (en) | Switch-on current tripper | |
| CN206992680U (en) | Undervoltage protection circuit | |
| CN102044379B (en) | Relay control device | |
| CN206422761U (en) | A kind of switching signal detects circuit | |
| CN204330872U (en) | The load voltage testing circuit of current zero-crossing point testing circuit and correspondence | |
| CN205017222U (en) | Switching power supply and electronic equipment | |
| CN204497758U (en) | A kind of lithium cell charging current limliting module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161109 |
|
| RJ01 | Rejection of invention patent application after publication |