CN205693434U - Double loop power supply automatic switching power supply circuits - Google Patents
Double loop power supply automatic switching power supply circuits Download PDFInfo
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- CN205693434U CN205693434U CN201620622177.XU CN201620622177U CN205693434U CN 205693434 U CN205693434 U CN 205693434U CN 201620622177 U CN201620622177 U CN 201620622177U CN 205693434 U CN205693434 U CN 205693434U
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Abstract
This utility model provides double loop power supply automatic switching power supply circuits, solves the problem that original double loop power supply automatic switching power supply circuit construction is complicated, volume is big and reliability is the highest.Double loop power supply automatic switching power supply circuits, including alternating current power supply A and alternating current power supply B, including interconnective selection control unit and interlocking control unit；Described interlocking control unit includes the A.C. contactor KM1 and A.C. contactor KM2 of interlocking connection；The normally opened contact KM1C series connection of wherein said A.C. contactor KM1 accesses between the live wire of described alternating current power supply A and load, and the normally opened contact KM2C series connection of described A.C. contactor KM2 accesses between the live wire of described alternating current power supply B and load；Described selection control unit is in order to control to select the adhesive of the normally opened contact KM2C of normally opened contact KM1C or the described A.C. contactor KM2 of described A.C. contactor KM1, and when avoiding described alternating current power supply A and described alternating current power supply B to send a telegram here, two-way power supply competes the short circuit caused simultaneously.
Description
Technical field
The present invention relates to power supply control switching circuit field, particularly to double loop power supply automatic switching power supply circuits.
Background technology
In occasion of much powering, such as compact type substation, power plant, chemical plant etc., load needs continuous print to power, at these
Occasion uses two-way power supply to backup each other to improve the reliability powered mostly, when main road has a power failure, mostly needs manually
Switch to stand-by power supply, cause centre can load unpowered for some time, it is impossible to realize unmanned.
Although double loop power supply automatic switching power supply circuits need the problem of manual switching stand-by power supply when solving power failure, but
It is, the complex structural designs of existing double loop power supply automatic switching power supply circuits that not only system bulk is big, and too much components and parts are more
Reduce the reliability of system, also make the response speed relative reduction of system.
Summary of the invention
The invention provides double loop power supply automatic switching power supply circuits, solve original double loop power supply automatic switching and power electricity
The problem that line structure is complicated, volume is big and reliability is the highest.
For achieving the above object, technical solution of the present invention is:
Double loop power supply automatic switching power supply circuits, including alternating current power supply A and alternating current power supply B, including interconnective selection
Control unit and interlocking control unit；
Described interlocking control unit includes the A.C. contactor KM1 and A.C. contactor KM2 of interlocking connection；Wherein said friendship
The normally opened contact KM1C series connection of stream catalyst KM1 accesses between the live wire of described alternating current power supply A and load, described A.C. contactor
The normally opened contact KM2C series connection of KM2 accesses between the live wire of described alternating current power supply B and load；
Described selection control unit is in order to control to select normally opened contact KM1C or the described exchange of described A.C. contactor KM1
The adhesive of the normally opened contact KM2C of catalyst KM2, and when avoiding described alternating current power supply A and described alternating current power supply B to send a telegram here simultaneously
Two-way power supply competes the short circuit caused.
Further, described interlocking connection mode is: normally-closed contact KM1A one end of described A.C. contactor KM1 accesses zero
Line N, the other end is connected with one end of the coil KM2B of described A.C. contactor KM2；The other end of described coil KM2B is with described
Selection control unit connects；Zero line N, the other end and described friendship are accessed in normally-closed contact KM2A one end of described A.C. contactor KM2
One end of the coil KM1B of stream catalyst KM1 connects, the other end of described coil KM1B and the live wire phase of described alternating current power supply A
Connect.
Further, described selection control unit includes A.C. contactor KM3.
Further, described selection control unit includes at least one AC relay RLY.
Further, the normally opened contact KM3C of described A.C. contactor KM3 is connected with the other end of described coil KM2B, line
Circle KM3B one end is connected with described zero line N, and the other end is connected with the live wire of described alternating current power supply B.
Further, the normally opened contact of described AC relay RLY1 is connected with the other end of described coil KM2B, described
Described zero line N is accessed in coil one end of AC relay RLY1, and the other end accesses the live wire of described alternating current power supply B.
Further, described selection control unit includes AC relay RLY2 and AC relay RLY3, described RLY2
Coil one end be connected with described zero line N, the other end access described alternating current power supply B live wire；The normally opened contact of described RLY2 with
One end of the coil of described AC relay RLY3 is connected, and the other end of the coil of described AC relay RLY3 accesses described zero
Line N；The normally opened contact of described AC relay RLY3 is connected with the other end of described coil KM2B.
From the above-mentioned description of this invention, compared to the prior art, present invention have the advantage that
One, in the present invention, A.C. contactor KM1 and A.C. contactor KM2 attaches a normally-closed contact, its respective coil
The loop that controls all be serially connected in one group of normally-closed contact loop of the other side, define electrical interlocks, by AC relay or
A.C. contactor KM3 controls the selection of double loop power supply, achieves the purpose of automatic switching when a certain road alternating current power supply power-off,
The short circuit that competition causes it can be avoided that two-way alternating current power supply is sent a telegram here simultaneously, truly achieves unattended mesh the most again
's.
Two, the most only having used two kinds of components and parts in the present invention, the quantity of components and parts used is few, and kind is few so that the present invention
Overall volume is smaller and more exquisite, and circuit is simpler, and the reliability of system is higher.
Three, the present invention selects control unit can be in series by multiple AC relays, control single in order to extend selection
The movement time of unit, interlock control unit reaction action simultaneously when sending a telegram here for two-way alternating current power supply and provide the longer time, make
Its anti-battle short function is relatively reliable, further increases the safety of circuit.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the present invention, this
Bright schematic description and description is used for explaining the present invention, is not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is present system structured flowchart；
Fig. 2 is the circuit diagram of the embodiment of the present invention one；
Fig. 3 is the circuit diagram of the embodiment of the present invention two；
Fig. 4 is the circuit diagram of the embodiment of the present invention three.
Detailed description of the invention
In order to make the technical problem to be solved, technical scheme and beneficial effect clearer, clear, below tie
Close drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein is only used
To explain the present invention, it is not intended to limit the present invention.
Referring to figs. 1 through Fig. 4, double loop power supply automatic switching power supply circuits, including alternating current power supply A and alternating current power supply B, including phase
The selection control unit 2 connected and interlocking control unit 1；
Described interlocking control unit 1 includes the A.C. contactor KM1 and A.C. contactor KM2 of interlocking connection；Wherein said
The normally opened contact KM1C series connection of A.C. contactor KM1 accesses between the live wire of described alternating current power supply A and load, described ac contactor
The normally opened contact KM2C series connection of device KM2 accesses between the live wire of described alternating current power supply B and load；
Described selection control unit 2 is in order to control to select normally opened contact KM1C or the described friendship of described A.C. contactor KM1
The adhesive of the normally opened contact KM2C of stream catalyst KM2, and avoid described alternating current power supply A and described alternating current power supply B to send a telegram here simultaneously
Time two-way power supply compete the short circuit that causes.
Embodiment one:
With reference to Fig. 2, in the present invention, the normally opened contact KM1C series connection of described A.C. contactor KM1 accesses described alternating current power supply
Between live wire and the load of A, the normally opened contact KM2C series connection of described A.C. contactor KM2 accesses the live wire of described alternating current power supply B
And between load；Zero line N, the other end and described ac contactor are accessed in normally-closed contact KM1A one end of described A.C. contactor KM1
One end of the coil KM2B of device KM2 connects；The other end of described coil KM2B is connected with described A.C. contactor KM3；Described friendship
The coil KM1B's of zero line N, the other end and described A.C. contactor KM1 accessed in normally-closed contact KM2A one end of stream catalyst KM2
One end connects, and the other end of described coil KM1B connects with the live wire of described alternating current power supply A.The most described A.C. contactor KM1
Electrical interlocks is formed with described A.C. contactor KM2.
The normally opened contact KM3C of described A.C. contactor KM3 is connected with the other end of described coil KM2B, coil KM3B mono-
End is connected with described zero line N, and the other end is connected with the live wire of described alternating current power supply B.
Operation principle:
State one:
When alternating current power supply A is charged, and at this moment alternating current power supply B is not charged, the coil KM3B no power of A.C. contactor KM3,
Therefore the normally opened contact KM3C of A.C. contactor KM3 is off, and causes the coil KM2B of A.C. contactor KM2 obstructed
Electricity, so the normally opened contact KM2C of A.C. contactor KM2 is also at off-state, the normally-closed contact KM2A of A.C. contactor KM2
Being in closure state, now the coil KM1B of A.C. contactor KM1 is energized due to the Guan Bi of KM2A, as A.C. contactor KM1
Coil KM1B in have electric current to flow through, the normally-closed contact KM1A of A.C. contactor KM1 disconnects, and the normally opened of A.C. contactor KM1 touches
Point KM1C Guan Bi, is supported under the power supply of alternating current power supply A and works；
Now if alternating current power supply B is sent a telegram here again, the normally opened contact KM3C Guan Bi of A.C. contactor KM3, but this
Time A.C. contactor KM1 normally-closed contact KM1A still in off-state, now the coil KM2B of A.C. contactor KM2 does not lead to
Electricity, so the normally opened contact KM2C of A.C. contactor KM2 is still in off-state, it is ensured that by alternating current power supply A stable power-supplying；
If at this moment alternating current power supply A power-off, the coil KM1B dead electricity of A.C. contactor KM1, A.C. contactor KM1's is normally opened
Contact KM1C disconnects, the normally-closed contact KM1A Guan Bi of A.C. contactor KM1, and now the coil KM2B of A.C. contactor KM2 obtains electric,
The normally-closed contact KM2A of A.C. contactor KM2 disconnects, and the normally opened contact KM2C Guan Bi of A.C. contactor KM2, now by alternating current
Source B powers.
State 2:
When alternating current power supply B is charged, and at this moment alternating current power supply A is not charged, the normally-closed contact KM1A of A.C. contactor KM1 is in
Closure state, the normally opened contact KM3C Guan Bi of A.C. contactor KM3, now the coil KM2B of A.C. contactor KM2 obtains electric, exchange
The normally opened contact KM2C Guan Bi of catalyst KM2, the normally-closed contact KM2A of A.C. contactor KM2 disconnects, and A.C. contactor KM1's is normal
Open contact KM1C to be off, be supported under the power supply of alternating current power supply B and work；
Now if alternating current power supply A is sent a telegram here again, owing to the normally-closed contact KM2A of A.C. contactor KM2 disconnects shape
State, so the coil KM1B of A.C. contactor KM1 is in open circuit, now the normally opened contact KM1C of A.C. contactor KM1 still locates
In off-state, it is ensured that by alternating current power supply B stable power-supplying.
If at this moment alternating current power supply B power-off, the normally opened contact KM3C of A.C. contactor KM3 disconnects, now A.C. contactor
The coil KM2B dead electricity of KM2, the normally opened contact KM2C of A.C. contactor KM2 disconnects, the normally-closed contact KM2A of A.C. contactor KM2
Guan Bi, the coil KM1B of A.C. contactor KM1 is in electric, and the normally-closed contact KM1A of A.C. contactor KM1 disconnects, ac contactor
The normally opened contact KM1C Guan Bi of device KM1, is now powered by alternating current power supply A.
State 3:
When alternating current power supply A and alternating current power supply B are sent a telegram here, owing to the coil KM3B excitation of A.C. contactor KM3 needs one simultaneously
Section the time, normally opened contact KM3C Guan Bi time be also required to a period of time, therefore A.C. contactor KM3 action during this period of time in,
A.C. contactor KM1 elder generation action in alternating current power supply A, now the coil KM1B of A.C. contactor KM1 is in electric, ac contactor
The normally-closed contact KM1A of device KM1 disconnects, the normally opened contact KM1C Guan Bi of A.C. contactor KM1, alternating current circuit A take the lead in powering,
Due to electrical interlocks, the A.C. contactor KM2 in alternating current power supply B is failure to actuate, it is to avoid A.C. contactor KM1 and A.C. contactor
KM2 competition action causes alternating current power supply A and alternating current power supply B instantaneous short circuit.
Embodiment two:
With reference to Fig. 3, embodiment two is essentially identical with embodiment one, and its difference is: described AC relay RLY1
Normally opened contact be connected with the other end of described coil KM2B, described zero line is accessed in coil one end of described AC relay RLY1
N, the other end accesses the live wire of described alternating current power supply B.
Operation principle:
State one:
When alternating current power supply A is charged, and at this moment alternating current power supply B is not charged, the coil no power of AC relay RLY1, therefore
The normally opened contact of AC relay RLY1 is off, and causes the coil KM2B no power of A.C. contactor KM2, so handing over
The normally opened contact KM2C of stream catalyst KM2 is also at off-state, and the normally-closed contact KM2A of A.C. contactor KM2 is in closed form
State, now the coil KM1B of A.C. contactor KM1 is energized due to the Guan Bi of KM2A, as the coil KM1B of A.C. contactor KM1
In have electric current to flow through, the normally-closed contact KM1A of A.C. contactor KM1 disconnects, the normally opened contact KM1C Guan Bi of A.C. contactor KM1,
It is supported under the power supply of alternating current power supply A and works；
Now if alternating current power supply B is sent a telegram here again, the normally opened contact Guan Bi of AC relay RLY1, but now hand over
The normally-closed contact KM1A of stream catalyst KM1 is still in off-state, and now the coil KM2B of A.C. contactor KM2 is not energized,
So the normally opened contact KM2C of A.C. contactor KM2 is still in off-state, it is ensured that by alternating current power supply A stable power-supplying；
If at this moment alternating current power supply A power-off, the coil KM1B dead electricity of A.C. contactor KM1, A.C. contactor KM1's is normally opened
Contact KM1C disconnects, the normally-closed contact KM1A Guan Bi of A.C. contactor KM1, and now the coil KM2B of A.C. contactor KM2 obtains electric,
The normally-closed contact KM2A of A.C. contactor KM2 disconnects, and the normally opened contact KM2C Guan Bi of A.C. contactor KM2, now by alternating current
Source B powers.
State 2:
When alternating current power supply B is charged, and at this moment alternating current power supply A is not charged, the normally-closed contact KM1A of A.C. contactor KM1 is in
Closure state, the normally opened contact Guan Bi of AC relay RLY1, now the coil KM2B of A.C. contactor KM2 obtains electric, and exchange connects
The normally opened contact KM2C Guan Bi of tentaculum KM2, the normally-closed contact KM2A of A.C. contactor KM2 disconnects, and A.C. contactor KM1's is normally opened
Contact KM1C is off, and is supported under the power supply of alternating current power supply B and works；
Now if alternating current power supply A is sent a telegram here again, owing to the normally-closed contact KM2A of A.C. contactor KM2 disconnects shape
State, so the coil KM1B of A.C. contactor KM1 is in open circuit, now the normally opened contact KM1C of A.C. contactor KM1 still locates
In off-state, it is ensured that by alternating current power supply B stable power-supplying.
If at this moment alternating current power supply B power-off, the normally opened contact of AC relay RLY1 disconnects, now A.C. contactor KM2
Coil KM2B dead electricity, the normally opened contact KM2C of A.C. contactor KM2 disconnects, and the normally-closed contact KM2A of A.C. contactor KM2 closes
Closing, the coil KM1B of A.C. contactor KM1 is in electric, and the normally-closed contact KM1A of A.C. contactor KM1 disconnects, ac contactor
The normally opened contact KM1C Guan Bi of device KM1, is now powered by alternating current power supply A.
State 3:
When alternating current power supply A and alternating current power supply B are sent a telegram here simultaneously, when needing one section due to the coil magnetization of AC relay RLY1
Between, it is also required to a period of time during the normally opened contact of AC relay RLY1D Guan Bi, therefore at this of AC relay RLY1 action
In the section time, the A.C. contactor KM1 elder generation action in alternating current power supply A, now the coil KM1B of A.C. contactor KM1 is in
Electricity, the normally-closed contact KM1A of A.C. contactor KM1 disconnects, and the normally opened contact KM1C Guan Bi of A.C. contactor KM1, by alternating current circuit
A takes the lead in power supply, and due to electrical interlocks, the A.C. contactor KM2 in alternating current power supply B is failure to actuate, it is to avoid A.C. contactor KM1 and
A.C. contactor KM2 competition action causes alternating current power supply A and alternating current power supply B instantaneous short circuit.
Embodiment three:
With reference to Fig. 4, embodiment three is essentially identical with embodiment two, and its difference is: described selection control unit bag
Including AC relay RLY2 and AC relay RLY3, coil one end of described RLY2 is connected with described zero line N, and the other end accesses
The live wire of described alternating current power supply B；The normally opened contact of described RLY2 is connected with one end of the coil of described AC relay RLY3, institute
The other end of the coil stating AC relay RLY3 accesses described zero line N；The normally opened contact of described AC relay RLY3 and institute
The other end stating coil KM2B connects.
Operation principle: embodiment three is essentially identical with the operation principle of embodiment two, it is single that it is a difference in that selection controls
Unit is composed in series by AC relay RLY2 and AC relay RLY3, and selecting control unit work when, exchange continues
Electrical equipment RLY2 and AC relay RLY3 action successively, increase subsequent conditioning circuit with this and reach the purpose of time delay movement time,
Alternating current power supply A and alternating current power supply B instantaneous short circuit is caused for avoiding A.C. contactor KM1 and A.C. contactor KM2 competition action
The more time is provided.
Certainly, in the present invention, the quantity of AC relay is not limited solely to the scope in the present invention cited by embodiment,
3 can also be further increased to according to the relay types of actual selection and required delay time, 4,5 ... only
Want to realize the purpose of the present invention.
In the present invention, alternating current power supply A is three-phase alternating current, and its three roads live wire is LA1, LA2, LA3, and alternating current power supply B is three-phase
Electricity, its three roads live wire is LB1, LB2, LB3, and accordingly, the normally opened contact of A.C. contactor KM1 and A.C. contactor KM2 is the most all
It it is three；Certainly, simply use in alternating current power supply A or alternating current power supply B wherein a road or two-way live wire when, this
Bright stand good.
Described above illustrate and describes the preferred embodiments of the present invention, as previously mentioned, it should be understood that the present invention not office
Be limited to form disclosed herein, be not to be taken as the eliminating to other embodiments, and can be used for other combinations various, amendment and
Environment, and can be changed by above-mentioned teaching or the technology of association area or knowledge in invention contemplated scope described herein
Dynamic.And the change that those skilled in the art are carried out and change are without departing from the spirit and scope of the present invention, the most all should be appended by the present invention
In scope of the claims.
Claims (7)
1. double loop power supply automatic switching power supply circuits, including alternating current power supply A and alternating current power supply B, it is characterised in that: include interconnecting mutually
The selection control unit connect and interlocking control unit；
Described interlocking control unit includes the A.C. contactor KM1 and A.C. contactor KM2 of interlocking connection；Wherein said exchange connects
The normally opened contact KM1C series connection of tentaculum KM1 accesses between the live wire of described alternating current power supply A and load, described A.C. contactor KM2
Normally opened contact KM2C series connection access described alternating current power supply B live wire and load between；
Described selection control unit is in order to control to select normally opened contact KM1C or the described ac contactor of described A.C. contactor KM1
The adhesive of the normally opened contact KM2C of device KM2, and two-way when avoiding described alternating current power supply A and described alternating current power supply B simultaneously to send a telegram here
Power supply competes the short circuit caused.
2. double loop power supply automatic switching power supply circuits as claimed in claim 1, it is characterised in that: described interlocking connection mode
For: the line of zero line N, the other end and described A.C. contactor KM2 is accessed in normally-closed contact KM1A one end of described A.C. contactor KM1
One end of circle KM2B connects；The other end of described coil KM2B is connected with described selection control unit；Described A.C. contactor KM2
Normally-closed contact KM2A one end access zero line N, the other end is connected with one end of the coil KM1B of described A.C. contactor KM1, institute
The live wire of the other end and described alternating current power supply A of stating coil KM1B connects.
3. double loop power supply automatic switching power supply circuits as claimed in claim 2, it is characterised in that: described selection control unit bag
Include A.C. contactor KM3.
4. double loop power supply automatic switching power supply circuits as claimed in claim 2, it is characterised in that: described selection control unit bag
Include at least one AC relay RLY.
5. double loop power supply automatic switching power supply circuits as claimed in claim 3, it is characterised in that: described A.C. contactor KM3
The other end of normally opened contact KM3C and described coil KM2B be connected, coil KM3B one end is connected with described zero line N, the other end with
The live wire of described alternating current power supply B connects.
6. double loop power supply automatic switching power supply circuits as claimed in claim 4, it is characterised in that: described AC relay RLY1
Normally opened contact be connected with the other end of described coil KM2B, described zero line is accessed in coil one end of described AC relay RLY1
N, the other end accesses the live wire of described alternating current power supply B.
7. double loop power supply automatic switching power supply circuits as claimed in claim 4, it is characterised in that: described selection control unit bag
Including AC relay RLY2 and AC relay RLY3, coil one end of described RLY2 is connected with described zero line N, and the other end accesses
The live wire of described alternating current power supply B；The normally opened contact of described RLY2 is connected with one end of the coil of described AC relay RLY3, institute
The other end of the coil stating AC relay RLY3 accesses described zero line N；The normally opened contact of described AC relay RLY3 and institute
The other end stating coil KM2B connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620622177.XU CN205693434U (en) | 2016-06-22 | 2016-06-22 | Double loop power supply automatic switching power supply circuits |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620622177.XU CN205693434U (en) | 2016-06-22 | 2016-06-22 | Double loop power supply automatic switching power supply circuits |
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| CN205693434U true CN205693434U (en) | 2016-11-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958633A (en) * | 2016-06-22 | 2016-09-21 | 中航太克（厦门）电力技术股份有限公司 | Two-way power supply automatic switching power supply circuit |
-
2016
- 2016-06-22 CN CN201620622177.XU patent/CN205693434U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958633A (en) * | 2016-06-22 | 2016-09-21 | 中航太克（厦门）电力技术股份有限公司 | Two-way power supply automatic switching power supply circuit |
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