CN104079060B - Three-way power source switchover circuit and method - Google Patents
Three-way power source switchover circuit and method Download PDFInfo
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- CN104079060B CN104079060B CN201410290352.5A CN201410290352A CN104079060B CN 104079060 B CN104079060 B CN 104079060B CN 201410290352 A CN201410290352 A CN 201410290352A CN 104079060 B CN104079060 B CN 104079060B
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000005611 electricity Effects 0.000 claims description 18
- 239000003054 catalyst Substances 0.000 claims description 11
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
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Abstract
The invention relates to the technical field of multi-way power source supply, and particularly discloses a three-way power source switchover circuit and method. The three-way power source switchover circuit comprises a first input terminal, a second input terminal, a third input terminal, a first alternating current contactor, a second alternating current contactor and a power supply module, wherein the first input terminal is connected with a coil of the first alternating current contactor and a normally open contact, the normally open contact is connected with the power supply module, the second input terminal is connected with a first normally closed contact and a second normally closed contact of the first alternating current contactor, the second normally closed contact is connected with the power supply module through a normally open contact of the second contactor, the third input terminal is connected with a third normally closed contact of the first alternating current contactor, a normally closed contact of the second alternating current contactor is connected with the power supply module, and switching over of a power source is achieved through the switching on or off of the contactors in the power-on or power-off process of the input terminals. The three-way power source switchover circuit and method can achieve automatic switching over of three phases of power, and is simple in circuit structure, low in cost and high in reliability.
Description
Technical field
The present invention relates to multiple power supplies power supply technique field, particularly to a kind of three-way power switching circuit and three roads electricity
Source switch method.
Background technology
In the industrial system of three phase supply, what most of control power module adopted is all single phase power supply, such as single-phase electricity
Source lacks, and power module is by power-off.Have some companies to achieve the switching of three-way power using technological means at present, for example in
State's utility model patent 201320483007.4, is including the tie point electrically connecting with two-way independent current source and the second branch road,
Also include the 3rd branch road with generating mechatronics, described three
The middle part of branch road is provided with by the catalyst of controller control action, and the input section of described three branch roads is provided with
The measurement module electrically connecting with controller input, the deferent segment of described three branch roads is connected in parallel by copper bar.Described three
Input chopper is provided with the input section of bar branch road.By operation input chopper, three branch road input sections can be controlled
Break-make, so when breaking down, can be by manual intervention mode force disconnect power circuit it is ensured that power supply reliability.
Although this switching circuit achieves the switching of power supply, circuit is complicated, high cost, needs manually to carry out operation ability in fact
Existing.
Content of the invention
The problem to be solved in the present invention is to provide a kind of three-way power switching circuit, as long as it can guarantee that in three-phase electricity arbitrarily
One does not lack, power module all will not power-off, circuit is simple, low cost, automation mechanized operation.
The present invention also provides a kind of three-way power changing method.
For achieving the above object, the technical solution adopted in the present invention is：
A kind of three-way power switching circuit, it include first input end, the second input terminal, the 3rd input terminal,
One A.C. contactor KM1, the second A.C. contactor KM2 and supply module, the first A.C. contactor KM1 has normally opened contact
KM1-NO-1 and the first normally-closed contact KM1-NC-1, the second normally-closed contact KM1-NC-2 and the 3rd normally-closed contact KM1-NC-3,
Second A.C. contactor KM2 has normally-closed contact KM2-NC-1 and normally opened contact KM2-NO-1；First input end and the first friendship
Normally opened contact KM1-NO-1 one end of coil one end of stream catalyst KM1 and the first A.C. contactor KM1 connects, the first exchange
The coil other end of catalyst KM1 is connected with the N line of input power, the normally opened contact KM1-NO-1 of the first A.C. contactor KM1
The other end is connected with supply module；Second input terminal the first normally-closed contact KM1-NC- with the first A.C. contactor KM1 respectively
1st, one end of the second normally-closed contact KM1-NC-2 connects, and the first normally-closed contact KM1-NC-1 other end connects the second A.C. contactor
Coil one end of KM2, the other end of the coil of the second A.C. contactor KM2 connects the N line of input power, the first A.C. contactor
The normally opened contact KM2-NO-1 of the other end connection second A.C. contactor KM2 of the second normally-closed contact KM1-NC-2 of KM1, second
The normally opened contact KM2-NO-1 of A.C. contactor KM2 is connected with supply module；3rd input terminal connects the first A.C. contactor
The 3rd normally-closed contact KM1-NC-3 of KM1, the 3rd normally-closed contact KM1-NC-3 other end connects the normal of the second A.C. contactor KM2
One end of closed contact KM2-NC-1, the other end of normally-closed contact KM2-NC-1 of the second A.C. contactor KM2 is with supply module even
Connect.
Preferably, described supply module is power supply group.
A kind of method of three-way power switching, it includes described three-way power switching circuit；First input end has electricity
When, the coil electricity of the first A.C. contactor KM1, first input end passes through the normally opened contact of the first A.C. contactor KM1
KM1-NO-1 powers to supply module, and all closed contacts of the first A.C. contactor KM1 disconnect, and the second input terminal is defeated with the 3rd
Enter terminal not power；During first input end power down, the coil no power of the first A.C. contactor KM1：If the second input terminal
All there are electricity, the coil electricity of the second A.C. contactor KM2, the normally-closed contact of the second A.C. contactor KM2 with the 3rd input terminal
KM2-NC-1 disconnects, and the 3rd input terminal is not powered, and the second input terminal is normally closed tactile by the second of the first A.C. contactor KM1
The normally opened contact KM2-NO-1 of point KM1-NC-2 and the second A.C. contactor KM2 powers to supply module；If the second input terminal
Also power down, the 3rd input terminal passes through the 3rd normally-closed contact KM1-NC-3 of the first A.C. contactor KM1, the second A.C. contactor
The normally-closed contact KM2-NC-1 of KM2 is connected with supply module, is that supply module is powered.
Preferably, the priority that described first input end, the second input terminal and the 3rd input terminal are powered is the
One input terminal is preferential, and secondly, the 3rd input terminal is last for the second input terminal.
Three-way power switching circuit of the present invention and three-way power changing method, its advantage is：
Using two, there is normally opened and normally-closed contact catalyst, the automatization's conversion realizing three-phase electricity is it is ensured that in three-phase
Any one in electricity can be powered when not lacking, and improves the reliability of electricity consumption.Whole circuit only needs to two catalysts
Realize, circuit structure is simple, low cost.
Brief description
Fig. 1 is the circuit theory diagrams of embodiment of the present invention three-way power switching circuit.
Specific embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the present invention is made into one
Step ground describes in detail.
Embodiment：
Refer to Fig. 1, three-way power switching circuit of the present invention, it include first input end terminal1,
Two input terminal terminal2, the 3rd input terminal terminal3, the first A.C. contactor KM1, the second A.C. contactor KM2
And supply module power module.Wherein, the first A.C. contactor KM1 has normally opened contact KM1-NO-1 and first normally closed
Contact KM1-NC-1, the second normally-closed contact KM1-NC-2 and the 3rd normally-closed contact KM1-NC-3, the second A.C. contactor KM2 tool
There is normally-closed contact KM2-NC-1 and normally opened contact KM2-NO-1.Normally opened contact disconnects in corresponding A.C. contactor no power,
Close during energising；Normally-closed contact closes in corresponding A.C. contactor no power, disconnects during energising.Supply module power
Module is power supply group.
Circuit theory is：One end of coil of first input end terminal1 and the first A.C. contactor KM1 and
One end of the normally opened contact KM1-NO-1 of one A.C. contactor KM1 connects, the other end of coil of the first A.C. contactor KM1 with
The connection of N line, the normally opened contact KM1-NO-1 other end of the first A.C. contactor KM1 and the supply module power of input power
Module connects.Second input terminal terminal2 the first normally-closed contact KM1-NC- with the first A.C. contactor KM1 respectively
1st, one end of the second normally-closed contact KM1-NC-2 connects, and the first normally-closed contact KM1-NC-1's of the first A.C. contactor KM1 is another
One end connects coil one end of the second A.C. contactor KM2, and the other end of the coil of the second A.C. contactor KM2 connects input electricity
The N line in source, the other end of the second normally-closed contact KM1-NC-2 of the first A.C. contactor KM1 connects the second A.C. contactor KM2
Normally opened contact KM2-NO-1 one end, the normally opened contact KM2-NO-1 other end of the second A.C. contactor KM2 connects supply module
power module.3rd input terminal terminal3 connects the 3rd normally-closed contact KM1-NC- of the first A.C. contactor KM1
The 3rd normally-closed contact KM1-NC-3 other end of 3, the first A.C. contactor KM1 connects the normally closed of the second A.C. contactor KM2 and touches
One end of point KM2-NC-1, the other end of the normally-closed contact KM2-NC-1 of the second A.C. contactor KM2 connects supply module power
module.
Using the method that above-mentioned three-way power switching circuit switches three-way power it is：First input end terminal1 has
When electric, the coil electricity of the first A.C. contactor KM1, first input end terminal1 passes through the first A.C. contactor KM1's
Normally opened contact KM1-NO-1 is connected with supply module power module, powers to supply module power module.First friendship
All normally-closed contacts of stream catalyst KM1 disconnect, the second input terminal terminal2 and supply module power module, the
Circuit between three input terminal terminal3 and supply module power module disconnects, the second input terminal
Terminal2 is not all powered with the 3rd input terminal terminal3.
During first input end terminal1 power down, the coil no power of the first A.C. contactor KM1：If the second input
Terminal terminal2 and the 3rd input terminal terminal3 all has electricity, the coil electricity of the second A.C. contactor KM2, the second friendship
The normally-closed contact KM2-NC-1 of stream catalyst KM2 disconnects so that the 3rd input terminal terminal3 and supply module power
The circuit of module disconnects, and the 3rd input terminal terminal3 does not power, and the second input terminal terminal2 passes through first and hands over
The normally opened contact KM2-NO-1 of the second normally-closed contact KM1-NC-2 and the second A.C. contactor KM2 of stream catalyst KM1 gives power supply
Module power module powers；If the second input terminal terminal2 also power down, the 3rd input terminal terminal3 passes through
The 3rd normally-closed contact KM1-NC-3 of the first A.C. contactor KM1, the normally-closed contact KM2-NC-1 of the second A.C. contactor KM2 with
Supply module power module connects, and the 3rd input terminal terminal3 powers for supply module power module.Thus
Realize the switching of three-way power it is ensured that can power in an input not power down.
Above-mentioned first input end terminal1, the second input terminal terminal2 and the 3rd input terminal
The priority that terminal3 powers is that first input end terminal1 is preferential, the second input terminal terminal2 secondly, the
Three input terminal terminal3 are last.
The above is the preferred embodiment of the present invention it is noted that for those skilled in the art
For, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (2)
1. a kind of three-way power switching circuit it is characterised in that：Including first input end, the second input terminal, the 3rd input
Terminal, the first A.C. contactor KM1, the second A.C. contactor KM2 and supply module, the first A.C. contactor KM1 tool
There are normally opened contact KM1-NO-1 and the first normally-closed contact KM1-NC-1, the second normally-closed contact KM1-NC-2 and the 3rd normal
Closed contact KM1-NC-3, the second A.C. contactor KM2 has normally-closed contact KM2-NC-1 and normally opened contact KM2-NO-1；
Coil one end of first input end and the first A.C. contactor KM1 and the normally opened contact of the first A.C. contactor KM1
KM1-NO-1 one end connects, and the coil other end of the first A.C. contactor KM1 is connected with the N line of input power, and the first exchange connects
The normally opened contact KM1-NO-1 other end of tentaculum KM1 is connected with supply module；
Second input terminal the first normally-closed contact KM1-NC-1, the second normally-closed contact with the first A.C. contactor KM1 respectively
One end of KM1-NC-2 connects, and the first normally-closed contact KM1-NC-1 other end connects the coil of the second A.C. contactor KM2
One end, the other end of the coil of the second A.C. contactor KM2 connects the N line of input power, the first A.C. contactor KM1
The second normally-closed contact KM1-NC-2 the other end connect the second A.C. contactor KM2 normally opened contact KM2-NO-1, second friendship
The normally opened contact KM2-NO-1 of stream catalyst KM2 is connected with supply module；
3rd input terminal connects the 3rd normally-closed contact KM1-NC-3 of the first A.C. contactor KM1, the 3rd normally-closed contact
The KM1-NC-3 other end connects one end of the normally-closed contact KM2-NC-1 of the second A.C. contactor KM2, the second ac contactor
The other end of the normally-closed contact KM2-NC-1 of device KM2 is connected with supply module；
Described supply module is power supply group.
2. a kind of method of three-way power switching is it is characterised in that include the three-way power switching circuit described in claim 1
；
When first input end has electricity, the coil electricity of the first A.C. contactor KM1, first input end passes through first and exchanges
The normally opened contact KM1-NO-1 of catalyst KM1 powers to supply module, all closed contacts of the first A.C. contactor KM1
Disconnect, the second input terminal is not powered with the 3rd input terminal；
During first input end power down, the coil no power of the first A.C. contactor KM1：If the second input terminal and the 3rd
Input terminal all has electricity, the coil electricity of the second A.C. contactor KM2, the normally-closed contact KM2-NC- of the second A.C. contactor KM2
1 disconnection, the 3rd input terminal is not powered, and the second input terminal passes through second normally-closed contact of the first A.C. contactor KM1
The normally opened contact KM2-NO-1 of KM1-NC-2 and the second A.C. contactor KM2 powers to supply module；If the second input
Terminal also power down, the 3rd input terminal passes through the 3rd normally-closed contact KM1-NC-3 of the first A.C. contactor KM1, the second friendship
The normally-closed contact KM2-NC-1 of stream catalyst KM2 is connected with supply module, is that supply module is powered；
The priority that described first input end, the second input terminal and the 3rd input terminal are powered is that first input end is excellent
First, secondly, the 3rd input terminal is last for the second input terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410290352.5A CN104079060B (en) | 2014-06-24 | 2014-06-24 | Three-way power source switchover circuit and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410290352.5A CN104079060B (en) | 2014-06-24 | 2014-06-24 | Three-way power source switchover circuit and method |
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| Publication Number | Publication Date |
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| CN104079060A CN104079060A (en) | 2014-10-01 |
| CN104079060B true CN104079060B (en) | 2017-02-15 |
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| CN201410290352.5A Active CN104079060B (en) | 2014-06-24 | 2014-06-24 | Three-way power source switchover circuit and method |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104377812B (en) * | 2014-11-28 | 2016-09-21 | 青岛歌尔声学科技有限公司 | A kind of multi input power supply switch circuit |
| CN108736480A (en) * | 2017-04-25 | 2018-11-02 | 中国电力科学研究院 | A kind of multichannel AC looped network type energy router |
| CN110429705A (en) * | 2019-08-29 | 2019-11-08 | 强文 | A kind of integrated type electrical information interactive device of included UPS |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201528221U (en) * | 2009-09-10 | 2010-07-14 | 安徽方兴科技股份有限公司 | Three-way power supply automatic switching circuit to improve the service life of EPS system |
| CN201639354U (en) * | 2010-03-05 | 2010-11-17 | 江苏捷诚车载电子信息工程有限公司 | Power supply switching circuit |
| CN201910663U (en) * | 2010-12-29 | 2011-07-27 | 天津市研翔电子科技有限公司 | Three-power automatic switching control device |
| CN203368030U (en) * | 2013-08-08 | 2013-12-25 | 国网山东省电力公司潍坊供电公司 | Switching device of three branches of power supply |
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