CN109039026A - A kind of power module and power sources in parallel system - Google Patents
A kind of power module and power sources in parallel system Download PDFInfo
- Publication number
- CN109039026A CN109039026A CN201811203967.4A CN201811203967A CN109039026A CN 109039026 A CN109039026 A CN 109039026A CN 201811203967 A CN201811203967 A CN 201811203967A CN 109039026 A CN109039026 A CN 109039026A
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- Prior art keywords
- power
- power supply
- foot
- module
- output
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Classifications
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- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
- Control Of Voltage And Current In General (AREA)
Abstract
The invention discloses a kind of power module and power sources in parallel system, each power supply is identical in power-supply system, it is characterised in that: the FB foot of each power supply control chip is connected, and the GND foot of each power supply control chip is connected；The present invention is connected due to the FB foot of each power supply control chip; therefore feedback signal is identical; therefore whichever electric power output voltage is high; the output power of each power supply is centainly equal; overcurrent protection is triggered due to the high power supply of output voltage bears high current to be avoided that, the present invention is at low cost without increasing component; easily designed, reliability is higher.
Description
Technical field
The present invention relates to Switching Power Supplies, the in particular to switch power supply system of multiple module paralleling.
Background technique
The development that the birth of modular power source reflects power supply industry in recent years constantly improves, and modular power source is integrated
The new direction of circuit development, is with a wide range of applications, with the needs of high power load, the research of multiple module paralleling technology
Also increasing.
Fig. 1 is the schematic diagram of existing power supply circuit, comprising: input circuit, main power transformer T1, master power switch pipe
Except TR1, control chip U1, output circuit, output voltage sampling circuit, feedback optocoupler OC1 and feedback control circuit is isolated；Control
IC relevant pins processed are described as follows:
FB foot: it is used for fed-back output voltage signal；
GND foot: for connecting with reference to ground；
Other pin functions are unrelated with innovative point of the present invention, and no explanation is provided here.
When multiple module paralleling shown in FIG. 1 in use, assuming that 2 two module one, module wired in parallel use, such as attached drawing 2
It is shown, i.e. the zero curve of the phase line end L of the phase line end formation power sources in parallel system of the phase line end link block two of module one, module one
Hold the zero line side of link block two formed the zero line side N of power sources in parallel system, module one output just with the output of module two just
The negative connection of the negative output with module two of output that connection forms the positive Vo+ of output and module one of power sources in parallel system forms electricity
The negative Vo- of the output of source parallel system, although 2 two module one, module modular circuit parameters are just the same, due to component
Difference, module one, two liang of modules of module output voltage will not be identical, the high module of output voltage will flow backward into output
The low module of voltage, if giving circuit loading at this time, the high module of output voltage will bear most of load, lead to two modules
The uneven stream of output, if adding full load to circuit at this time, since the high module of voltage preferentially provides load, leads to the module that voltage is high
Overcurrent protection is easily triggered, so that circuit can not work normally, thus by customer complaint.
Therefore, it is necessary to be improved to the prior art.
Summary of the invention
In view of this, the technical problem to be solved in the present invention is to provide a kind of power module and power sources in parallel system, realize
Each power supply output is flowed in system.
In order to solve the above technical problems, the present invention is realized by following technical measures:
A kind of power module, it is characterised in that: draw the FB foot for controlling chip and GND foot to form two pin terminals.
A kind of power sources in parallel system, each power supply is identical in system, it is characterised in that: the FB foot of each power supply control chip is connected
It connects, and the GND foot of each power supply control chip is connected.
A kind of power sources in parallel system, each power supply is identical in system, it is characterised in that: and each power supply is encapsulated as power module,
The FB foot and GND foot of each power module internal control chip are brought out, and the FB foot being respectively brought out is connected, and be respectively brought out
GND foot is connected.
Present invention design results from: inventor has found power sources in parallel system as used circuit shown in Fig. 1, each power supply
Sample circuit negative terminal be connected directly to output ground, after power parameter determines, the output voltage of each power supply also just it is fixed not
Become, due to the difference of component, the output voltage of each power supply will not be identical, just has the high power supply of output voltage and flows backward
The power supply low into output voltage leads to each uneven stream of power supply output, or even band full load triggers product overcurrent suddenly in each power supply
The problem of protection, as long as and the feedback signal of each power supply is identical, the power of each power supply output is bound to equal, therefore whichever electricity
Source output voltage is high, and the output power of two power supplys is centainly equal, therefore the FB foot of each power supply control chip is connected, and each
The GND foot of power supply control chip is connected, and is just avoided that due to the high power supply of output voltage bears high current and triggers overcurrent protection,
And since the output power of each power supply is equal, that is, exports and flow.
Compared with prior art, the invention has the following beneficial effects:
1, in more power sources in parallel, this programme circuit can be very good to realize that intermodule output is flowed；
2, this programme can solve the problems, such as that more power sources in parallel band heavy-loaded circuits can not work normally；
3, for detection control circuit of the present invention compared with prior art complexity, by cleverly inventive concept, in realization
At low cost without increasing device while stating 1 and 2 beneficial effect, easily designed, reliability is higher.
Detailed description of the invention
The following further describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is the circuit diagram of existing power supply module；
Fig. 2 is 2 two module one, module wired in parallel schematic diagrames；
Fig. 3 is 2 two the improved module one of the present invention, module wired in parallel schematic diagrames.
Specific embodiment
In order to which the present invention is more clearly understood, with reference to the accompanying drawings and embodiments, the present invention is described in more detail.
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
Be illustrated in figure 32 two the improved module one of the present invention, module wired in parallel schematic diagrames, it is different from Fig. 2 it
Place are as follows: the FB foot of two modules and GND foot are drawn, each then are attached to together.
Working principle: as shown in Fig. 3 circuit, when two same wired in parallel in use, and by the FB foot of two modules
It draws with GND foot, each then is attached to together, if band full load suddenly, by feedback it is found that output loading is heavier, FB foot
Voltage is higher, and since the FB foot of two modules links together, FB foot is synchronous to be increased, that is to say, that the output work of two modules
Rate also increases simultaneously, as long as FB is identical, the power of two modules output is bound to equal, therefore whichever module output voltage
The output power of height, two modules is centainly equal, therefore avoids triggering overcurrent due to the high module of output voltage bears high current
Protection, and since the output power of two modules is equal, that is, it exports and flows.
Module one, module two can also be realized by discrete device in Fig. 3, at this time directly by the FB of each power supply control chip
Foot is connected, and the GND foot of each power supply control chip is connected.
The implementation of the present invention is not limited to this, and above content according to the invention is known using the ordinary skill of this field
Know and customary means, under the premise of not departing from above-mentioned basic fundamental thought of the invention, specific implementation circuit can be in the present invention
The modification, replacement or change for making other diversified forms, all fall within rights protection scope of the present invention；In addition, for ability
For the technical staff in domain, of the invention is not limited to Fig. 1, the feedback control circuit of example as shown in figure 1 for power circuit in parallel
It can also be realized using the circuit that amplifier forms, modification, replacement or the change of the other diversified forms made to this are also fallen
Within that scope of the present invention.
Claims (3)
1. a kind of power module, it is characterised in that: draw the FB foot for controlling chip and GND foot to form two of power module and draw
Foot.
2. a kind of power sources in parallel system, each power supply is identical in system, it is characterised in that: the FB foot of each power supply control chip is connected
It connects, and the GND foot of each power supply control chip is connected.
3. a kind of power sources in parallel system, each power supply is identical in system, it is characterised in that: each power supply is encapsulated as power module, respectively
The FB foot and GND foot of power module internal control chip are brought out, the GND that the FB foot being respectively brought out is connected, and is respectively brought out
Foot is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811203967.4A CN109039026A (en) | 2018-10-16 | 2018-10-16 | A kind of power module and power sources in parallel system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811203967.4A CN109039026A (en) | 2018-10-16 | 2018-10-16 | A kind of power module and power sources in parallel system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109039026A true CN109039026A (en) | 2018-12-18 |
Family
ID=64613303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811203967.4A Withdrawn CN109039026A (en) | 2018-10-16 | 2018-10-16 | A kind of power module and power sources in parallel system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109039026A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105281561A (en) * | 2014-06-10 | 2016-01-27 | 成都隆强科技有限公司 | Method for processing merging and current sharing problem of high-power high-frequency power supply |
| CN105450032A (en) * | 2015-12-30 | 2016-03-30 | 广西师范大学 | Leakage inductance energy feedback digital control device for DC-DC converter |
| CN105896980A (en) * | 2015-04-27 | 2016-08-24 | 成都芯源***有限公司 | Constant on-time controlled DC-DC converter and multiphase power supply |
| CN106787725A (en) * | 2016-12-30 | 2017-05-31 | 成都芯源***有限公司 | Multiphase parallel power supply system, single-chip switch integrated circuit and current sharing method |
-
2018
- 2018-10-16 CN CN201811203967.4A patent/CN109039026A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105281561A (en) * | 2014-06-10 | 2016-01-27 | 成都隆强科技有限公司 | Method for processing merging and current sharing problem of high-power high-frequency power supply |
| CN105896980A (en) * | 2015-04-27 | 2016-08-24 | 成都芯源***有限公司 | Constant on-time controlled DC-DC converter and multiphase power supply |
| CN105450032A (en) * | 2015-12-30 | 2016-03-30 | 广西师范大学 | Leakage inductance energy feedback digital control device for DC-DC converter |
| CN106787725A (en) * | 2016-12-30 | 2017-05-31 | 成都芯源***有限公司 | Multiphase parallel power supply system, single-chip switch integrated circuit and current sharing method |
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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 | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181218 |
|
| WW01 | Invention patent application withdrawn after publication |