CN206226261U - A kind of parallel current-sharing electric power system based on multi-power module - Google Patents
A kind of parallel current-sharing electric power system based on multi-power module Download PDFInfo
- Publication number
- CN206226261U CN206226261U CN201621271358.9U CN201621271358U CN206226261U CN 206226261 U CN206226261 U CN 206226261U CN 201621271358 U CN201621271358 U CN 201621271358U CN 206226261 U CN206226261 U CN 206226261U
- Authority
- CN
- China
- Prior art keywords
- power module
- output
- circuit
- operational amplifier
- 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.)
- Active
Links
Landscapes
- Amplifiers (AREA)
Abstract
The utility model provides a kind of parallel current-sharing electric power system based on multi-power module, contrast amplification is carried out by the output current for detecting each power module, the output current error of two power modules is converted into Regulate signal, adjust the input voltage of power module ± S signal ends, so as to adjust the output voltage of power module, it is finally reached the output current for adjusting each power module so that the output current of each power module is eventually arrived at unanimously, the effect that formation is flowed.The flow equalizing circuit small volume, only needs a parallel wire connection between each module, without master slave relation, without communication, working mechanism is simple and reliable, is widely used in various power module.
Description
Technical field
The utility model is related to the Current Sharing Technology of power module, is particularly well-suited to the Parallel opertation of power module and superfluous
Remaining backup, specifically refers to a kind of parallel current-sharing electric power system based on multi-power module.
Background technology
Currently, in the application of Switching Power Supply, the utilization rate more and more higher of power module, it possesses using simple, convenient
The characteristics of, technical staff need not clearly know the operation principle of power module, the application mode that need to be only provided according to technical manual
And technical parameter, it is ensured that the running parameter of power module meets the regulation of technical manual, and power module can reliably work, defeated
Go out the desired reliable and stable supply voltage of user.Meanwhile, power module is also integrated with perfect protection circuit, it is ensured that power supply mould
Block can adapt to complicated applications environment, improve power module stability, and power module possesses using simple, reliability is high, volume
The outstanding advantages such as small, efficiency is high, are widely used in industrial circle.But, it is generally the case that the power module of below 300W is simultaneously
Do not possess flow equalizing function, the power module of a part of brand carries out parallel connection using primary side high voltage reference, and this leverages electricity
Application of the source module in some middle low power redundancy backup power supplys.For example, in highly reliable ruggedized computer power supply application, needing
Wanting two blocks of identical power supplys carries out redundancy backup output, during using the power module for not possessing parallel current-sharing function, can cause two
The output current of block power supply is different, and one piece of output current is big, and one piece of output current is small, and it is big that this will greatly promote output current
The stress of power supply, reduces the reliability of whole electric power system.Therefore, a kind of parallel current-sharing electric power system is designed, makes power module
Can seem very necessary by stream during output.
The content of the invention
The utility model in view of some do not have the middle low power power module of parallel function in application aspect produced problem,
A kind of parallel current-sharing electric power system based on multi-power module is devised, it is right to be carried out by the output current for detecting each power module
Than amplifying, the output current error of two power modules is converted into Regulate signal, adjusts the input of power module ± S signal ends
Voltage, so as to adjust the output voltage of power module, is finally reached the output current for adjusting each power module so that each electricity
The output current of source module is eventually arrived at unanimously, the effect that formation is flowed.The flow equalizing circuit small volume, only needs one between each module
Root parallel wire is connected, and without master slave relation, without communication, working mechanism is simple and reliable, is widely used in various power module.
The technical scheme that the utility model is used is：
A kind of parallel current-sharing electric power system based on multi-power module, including the first power module U101 and first flows electricity
Road, and second source module U201 and the second flow equalizing circuit；The two ends of first flow equalizing circuit respectively with the first power supply mould
Output cathode and the output negative pole connection of block U101；The topological structure of the second source module U201 and the second flow equalizing circuit with
The topological structure of the first power module U101 and the first flow equalizing circuit is completely the same；
First flow equalizing circuit and the second flow equalizing circuit are in parallel, and the first power module U101's and second source module U201 is defeated
Go out positive pole short circuit and as the output cathode of electric power system, the output of the first power module U101 and second source module U201 is born
It is extremely short to connect and as the output negative pole of electric power system；
Diode D101 is provided between the output cathode and the output cathode of electric power system of the first power module U101, it is described
The anode of diode D101 is connected with the output cathode of the first power module U101；The output cathode of second source module U201 with
The anode of diode D201, the diode D201 is provided between the output cathode of electric power system with second source module U201's
Output cathode is connected.
First flow equalizing circuit includes that current sample amplifying circuit, active rectifying circuit, impedance inverter circuit, error amplify electricity
Road and constant-current source regulation circuit；
The current sample amplifying circuit is by resistance R101, R102, R103, R104, and operational amplifier U1B compositions are described
Active rectifying circuit is by resistance R105, R106, diode D102, D103, operational amplifier U2B compositions, the impedance conversion electricity
Route operational amplifier U3B realizes that the error amplifying circuit is by resistance R107, R108, R109, electric capacity C101, operation amplifier
Device U4B is constituted, and the constant-current source regulation circuit is by operational amplifier U5B, triode Q101, resistance R110, R111 composition；
Resistance R101, as sampling resistor, the output negative pole of a first power module U101 of termination, a termination voltage module
Output negative pole, the two ends of one end difference connecting resistance R101 of resistance R103, R102, another termination operation amplifier of resistance R103
The input negative pole of device U1B, another termination operational amplifier U1B input positive poles of resistance R102, resistance R104 is connected across computing and puts
Between the input negative pole and output end of big device U1B, the two ends of resistance R105 connect output end and the computing of operational amplifier U1B respectively
The input positive pole of amplifier U2B, diode D102 anodes connect the input negative pole of operational amplifier U2B, and diode D102 negative electrodes connect
The output end of operational amplifier U2B, diode D103 anodes connect the output end of operational amplifier U2B, and diode D103 negative electrodes connect
Parallel wire, resistance R106 is connected across between the input negative pole of operational amplifier U2B and parallel wire respectively；Operational amplifier U3B's
Input positive pole connects parallel wire, operational amplifier U3B input negative poles and output end short circuit, and the two ends of resistance R107 connect computing and put respectively
The output end of big device U3B and the input positive pole of operational amplifier U4B, the two ends of resistance R108 connect operational amplifier U1B's respectively
The input negative pole of output end and operational amplifier U4B, the output end of U4B and defeated is connected across after electric capacity C101 and resistance R109 parallel connections
Enter between negative pole；The input positive pole of operational amplifier U5B connects the output end of operational amplifier U4B, and the base stage of triode Q101 connects
The output end of operational amplifier U5B, the emitter stage of triode Q101 connects the negative terminal of U5B, and the two ends of resistance R110 connect power supply respectively
+ S the ends of the output plus terminal of module U101 and the first power module U101, the colelctor electrode of triode Q101 connects power module U101's
+ S ends, the two ends of resistance R111 connect the emitter stage of triode Q101 and the output negative pole of the first power module U101 respectively.
The circuit connecting of second source module U201 and the second flow equalizing circuit and parameter with the first power module U101 and
First flow equalizing circuit is consistent, and the first flow equalizing circuit and the second flow equalizing circuit are connected by parallel wire.First power module U101-
S ends and its output negative pole short circuit；Similarly ,-S the ends of second source module U201 and its output negative pole short circuit.
The utility model can also increase alternative power source module and alternative flow equalizing circuit, alternative power source according to actual conditions
The connected mode of the topological structure, parameter and the first power module and the first flow equalizing circuit of module and alternative flow equalizing circuit with
Second source module is consistent with the second flow equalizing circuit.
The beneficial effects of the utility model are：
In the utility model, flow equalizing circuit small volume only needs a parallel wire to connect between each voltage module and flow equalizing circuit
Connect, without master slave relation, without communication, working mechanism is simple and reliable, is widely used in various power module.
Brief description of the drawings
Fig. 1 is a kind of knot of parallel current-sharing electric power system based on multi-power module of offer in the utility model embodiment
Structure block diagram.
Fig. 2 is the circuit diagram of the utility model embodiment.
Specific embodiment
The utility model is further illustrated with reference to the accompanying drawings and examples.
In order that above-mentioned purpose of the present utility model, feature and advantage can be more obvious understandable, it is right below in conjunction with the accompanying drawings
Specific embodiment of the invention is described in detail.
Fig. 1 Fig. 2 is respectively the utility model and includes two structured flowcharts and circuit connection diagram of the embodiment of power module,
In the present embodiment, by the output negative terminal series connection sampling resistor in the first power module U101, the first power module of sampling
Output current, resistance R101 two ends can produce voltage difference when electric current is flowed through, by this voltage difference by R102, R103, R104 and fortune
The differential amplifier circuit that amplifier U1B is formed is calculated, the current signal of resistance sampling is carried out into differential amplification, the signal warp after amplification
The active rectifying circuit that operational amplifier U2B and D102, D103, R106 are formed, makes the voltage signal can only be from active rectifying circuit
Exported to parallel connection type and be unable to reverse flow, while the inelastic region of the circuit for eliminating diode, makes final output to parallel wire
Signal there is no a diode drop, the negative electrode of D103 is parallel wire, and all of parallel signal is connected to this point, active rectification electricity
The voltage of the point is the maximum of all parallel signals when road is final.Line voltage in parallel does impedance by the follower that U3B is constituted
After conversion, the error amplifying circuit being made up of U4B, R107, R108, R109, C101 and the electric current of itself are using amplification signal
It is compared, the input of the constant-current source adjustment circuit that both errors are constituted as U5B, Q101, R110, R111 gives, by perseverance
Current source circuit according to the input voltage at given voltage-regulation+S ends so that the output voltage of regulation power supply module.When the first power supply
The output current of module more than other power module modules output current when, current value on parallel wire is oneself in itself
The output valve of current sample amplifying circuit, therefore, the positive and negative terminal voltage of error amplifying circuit is identical, is output as zero, power module
+ S terminal voltages be the output feedback voltage of module, module does not adjust.When the electric current of the first power module is less than other electricity
During the output current of source module, the signal on parallel wire is the current sample value of magnification of the power module of maximum output current,
After error signal is amplified by error amplifier, follow-up constant-current source regulation circuit is driven, the voltage at+S ends is with set-point
Increase and reduce, specially：
In formula：V+SIt is+S ends input voltage；
VOUTIt is module output-input voltage；
VGTo give voltage；
Understand that+S terminal voltages produce voltage difference with output voltage by above formula, power module can adjust output voltage makes output
Voltage rises, and after output voltage is raised, output current can also increase, and finally the output current with other power modules reaches dynamic
Effect is flowed in balance, formation.
The main circuit of the utility model is by power module, current sample amplifying circuit, active rectifying circuit, impedance conversion electricity
Road, error amplifying circuit, constant-current source regulation circuit composition.Resistance R101, R102, R103, R104 and operational amplifier U1B are constituted
Current sample amplifying circuit, its effect is after the current signal that power module is exported is converted into voltage signal, to be put through computing
Big device U1B carries out differential amplification, and current signal is converted to the voltage signal for being available for subsequent conditioning circuit to process.Active rectifying circuit by
Resistance R105, R106 diode D102, D103 operational amplifier U2B is constituted, and its effect is by the defeated of current sample amplifying circuit
Go out voltage signal output to parallel wire, while preventing the voltage signal on parallel wire to be reversely input to current sample amplifying circuit
Output end, i.e. voltage signal from the input of active rectifying circuit to output end one-way conduction, while active rectifying circuit disappears
Except the non-linear voltage drop of diode, the precision and stability of circuit are enhanced.U3B is impedance inverter circuit, connection be voltage with
With device, effect is that output, to rear class error amplifying circuit, reduces line voltage in parallel after the signal on parallel wire is done into impedance conversion
The input impedance of signal, lifts the stability of circuit.Error amplifying circuit is by resistance R107, R108, R109 electric capacity C101 computings
Amplifier U4B is constituted, and its effect is to compare and enlarge the output signal of current sample amplifying circuit and parallel wire signal, will
Both errors are exported after amplifying.Constant-current source adjusts circuit by operational amplifier U5B triode Q101 resistance R110, R111 groups
Into it is act as the output of error amplifying circuit as given, and constant-current source is formed in the CE poles of Q101, and the size of electric current is by giving
Fixed voltage and resistance R111 are determined, so that the voltage at+S ends is that can change with the exporting change of error amplifier, finally
The output current of power module is forced to reach unanimously by adjusting output voltage, the effect that formation is flowed.U201 and other units
The U101 and its circuit function with above-mentioned analysis are consistent for the circuit function parameter of device composition, and parallel wire is passed through between two circuits
It is connected, due to the one-way conduction characteristic of diode, therefore after magnitude of voltage on parallel wire is all blocks current amplifiers
Maximum, in this way, the maximum module of output current becomes primary module, second source module is by the current value of itself in parallel wire
On magnitude of voltage be compared after the error that produces entered to amplify after drive the voltage at rear class constant-current source circuit regulation+S ends, reach
Output voltage is improved so as to improve output current, the module identical current value with output maximum current value is finally reached, eliminated
Error, reaches dynamic equilibrium, is finally reached the purpose for flowing.
The part not illustrated in specification is prior art or common knowledge.It is new that the present embodiment is merely to illustrate the practicality
Type, rather than limit scope of the present utility model, those skilled in the art are for equivalent replacement that the utility model is done etc.
Modification is deemed to fall within the utility model right claim institute protection domain.
Claims (5)
1. a kind of parallel current-sharing electric power system based on multi-power module, it is characterised in that：Including the first power module U101 and
First flow equalizing circuit, the two ends of first flow equalizing circuit respectively with the output cathode and output negative pole of the first power module U101
Connection；
The electric power system also includes second source module U201 and the second flow equalizing circuit, the second source module U201 and second
The topological structure of flow equalizing circuit is completely the same with the topological structure of the first power module U101 and the first flow equalizing circuit；
First flow equalizing circuit and the second flow equalizing circuit are in parallel, and the output of the first power module U101 and second source module U201 is just
Extremely short to connect and as the output cathode of electric power system, the output negative pole of the first power module U101 and second source module U201 is short
Connect and as the output negative pole of electric power system；
Diode D101, two pole are provided between the output cathode and the output cathode of electric power system of the first power module U101
The anode of pipe D101 is connected with the output cathode of the first power module U101；The output cathode of second source module U201 and power supply
The anode of diode D201, the diode D201 and the output of second source module U201 are provided between the output cathode of system
Positive pole is connected.
2. a kind of parallel current-sharing electric power system based on multi-power module according to claim 1, it is characterised in that：It is described
First flow equalizing circuit includes current sample amplifying circuit, active rectifying circuit, impedance inverter circuit, error amplifying circuit and constant current
Source adjusts circuit；
The current sample amplifying circuit is by resistance R101, R102, R103, R104, and operational amplifier U1B compositions are described active
Rectified current routing resistance R105, R106, diode D102, D103, operational amplifier U2B compositions, the impedance inverter circuit by
Operational amplifier U3B realizes that the error amplifying circuit is by resistance R107, R108, R109, electric capacity C101, operational amplifier U4B
Composition, the constant-current source regulation circuit is by operational amplifier U5B, triode Q101, resistance R110, R111 composition；
Resistance R101, as sampling resistor, two ends connect respectively the first power module U101 output negative pole and electric power system it is defeated
Go out negative pole；Distinguish the two ends of connecting resistance R101, another termination operational amplifier of resistance R103 in one end of resistance R103, R102
The input negative pole of U1B, another termination operational amplifier U1B input positive poles of resistance R102；Resistance R104 is connected across operation amplifier
Between the input negative pole and output end of device U1B, the two ends of resistance R105 connect the output end of operational amplifier U1B respectively and computing is put
The input positive pole of big device U2B；Diode D102 anodes connect the input negative pole of operational amplifier U2B, and diode D102 negative electrodes connect fortune
The output end of amplifier U2B is calculated, diode D103 anodes connect the output end of operational amplifier U2B, and diode D103 negative electrodes connect simultaneously
On line；Resistance R106 is connected across between the input negative pole of operational amplifier U2B and parallel wire respectively；Operational amplifier U3B's is defeated
Enter positive pole and connect parallel wire, operational amplifier U3B input negative poles and output end short circuit, the two ends of resistance R107 connect operation amplifier respectively
The output end of device U3B and the input positive pole of operational amplifier U4B, the two ends of resistance R108 connect the defeated of operational amplifier U1B respectively
Go out the input negative pole of end and operational amplifier U4B, output end and the input of U4B are connected across after electric capacity C101 and resistance R109 parallel connections
Between negative pole；The input positive pole of operational amplifier U5B connects the output end of operational amplifier U4B, and the base stage of triode Q101 connects fortune
The output end of amplifier U5B is calculated, the emitter stage of triode Q101 connects the negative terminal of U5B, and the two ends of resistance R110 connect power supply mould respectively
+ S the ends of the output plus terminal of block U101 and the first power module U101, the colelctor electrode of triode Q101 meets the+S of power module U101
End, the two ends of resistance R111 connect the emitter stage of triode Q101 and the output negative pole of the first power module U101 respectively.
3. a kind of parallel current-sharing electric power system based on multi-power module according to claim 2, it is characterised in that：Second
The circuit connecting of power module U201 and the second flow equalizing circuit and parameter with the first power module U101 and the first flow equalizing circuit
Unanimously, the first flow equalizing circuit and the second flow equalizing circuit are connected by parallel wire.
4. a kind of parallel current-sharing electric power system based on multi-power module according to claim 3, it is characterised in that：It is described
- S the ends of the first power module U101 and its output negative pole short circuit；Similarly ,-S the ends of second source module U201 export negative with it
It is extremely short to connect.
5. a kind of parallel current-sharing electric power system based on multi-power module according to claim 4, it is characterised in that：The confession
Electric system also includes some alternative power source modules and alternative flow equalizing circuit, and the alternative power source module and alternative flow equalizing circuit are opened up
Flutter the connected mode of structure, component parameter and the first power module and the first flow equalizing circuit with second source module and
Two flow equalizing circuits are consistent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621271358.9U CN206226261U (en) | 2016-11-24 | 2016-11-24 | A kind of parallel current-sharing electric power system based on multi-power module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621271358.9U CN206226261U (en) | 2016-11-24 | 2016-11-24 | A kind of parallel current-sharing electric power system based on multi-power module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206226261U true CN206226261U (en) | 2017-06-06 |
Family
ID=58791476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621271358.9U Active CN206226261U (en) | 2016-11-24 | 2016-11-24 | A kind of parallel current-sharing electric power system based on multi-power module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206226261U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107728694A (en) * | 2017-10-25 | 2018-02-23 | 深圳市华星光电半导体显示技术有限公司 | Supply unit and its current equalizing method |
| CN112731834A (en) * | 2020-12-22 | 2021-04-30 | 重庆德科电子仪表有限公司 | System and method for low-power-consumption driving of indicator lamp of full-segment code instrument |
| CN112798866A (en) * | 2020-12-31 | 2021-05-14 | 中天海洋系统有限公司 | Conductivity signal acquisition circuit and testing device |
-
2016
- 2016-11-24 CN CN201621271358.9U patent/CN206226261U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107728694A (en) * | 2017-10-25 | 2018-02-23 | 深圳市华星光电半导体显示技术有限公司 | Supply unit and its current equalizing method |
| CN107728694B (en) * | 2017-10-25 | 2020-01-31 | 深圳市华星光电半导体显示技术有限公司 | Power supply device and current equalizing method thereof |
| CN112731834A (en) * | 2020-12-22 | 2021-04-30 | 重庆德科电子仪表有限公司 | System and method for low-power-consumption driving of indicator lamp of full-segment code instrument |
| CN112731834B (en) * | 2020-12-22 | 2022-07-01 | 重庆德科电子仪表有限公司 | System and method for low-power-consumption driving of indicator lamp of full-segment code instrument |
| CN112798866A (en) * | 2020-12-31 | 2021-05-14 | 中天海洋系统有限公司 | Conductivity signal acquisition circuit and testing device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206226261U (en) | A kind of parallel current-sharing electric power system based on multi-power module | |
| CN201813159U (en) | Power parallel machine flow equalization circuit with bidirectional adjustable output voltage | |
| CN203708590U (en) | High-efficiency LED linear constant current control circuit possessing high power factor | |
| CN202563365U (en) | Voltage-current switch circuit | |
| CN201156720Y (en) | Circuit of voltage follower | |
| CN203039562U (en) | Series connection IGBT voltage-equalizing circuit based on grid control | |
| CN205039717U (en) | Output polarity automatic switching's D.C. regulated power supply | |
| CN203287803U (en) | Voltage regulation circuit | |
| CN204886182U (en) | Parallelly connected power module can independently flow equalize | |
| CN107040228A (en) | A kind of failure circuit suitable for dead-band regulator | |
| CN203708589U (en) | Linear constant current LED driving circuit possessing temperature compensation | |
| CN202634271U (en) | Low-noise, wide-range and high-current battery simulation device | |
| CN208079468U (en) | The controlled constant-current source circuit of Linear Control | |
| CN203167360U (en) | High efficiency environmental protection LED high voltage linear constant current driving circuit | |
| CN204595664U (en) | A kind of high-precision low cost current-source arrangement | |
| CN102420525A (en) | Circuit for improving multi-path output cross regulation rate of switching power supply | |
| CN112910425A (en) | High-efficiency high-capacity piecewise linear power amplifier based on multi-tap transformer | |
| CN202364123U (en) | Circuit for improving multi-output cross regulation of switching power supply | |
| CN101925217A (en) | LED constant current driving circuit | |
| CN206790449U (en) | A kind of failure circuit suitable for dead-band regulator | |
| CN206759413U (en) | Current mode analog input interface circuit | |
| CN106981989B (en) | The multi-channel parallel type voltage-controlled current source and solar array simulator of linear power grade | |
| CN206524762U (en) | A kind of use TL431A serial voltage regulation circuit | |
| CN105048864A (en) | Novel error-amplification-type piezoelectric ceramic driving circuit | |
| CN206075182U (en) | A kind of DC current stabilized power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |