CN204376520U - A kind of multiple feed selection circuit - Google Patents
A kind of multiple feed selection circuit Download PDFInfo
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- CN204376520U CN204376520U CN201520046711.2U CN201520046711U CN204376520U CN 204376520 U CN204376520 U CN 204376520U CN 201520046711 U CN201520046711 U CN 201520046711U CN 204376520 U CN204376520 U CN 204376520U
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- relay
- power supply
- power source
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Abstract
A kind of multiple feed selection circuit, comprise main power source, stand-by power supply, relay and knife switch, the normally opened contact of described main power source cut-in relay, the normally-closed contact of described stand-by power supply cut-in relay, the moving contact of described relay is connected with power consumption equipment, the zero line of described main power source is connected with relay coil terminals, and the live wire of described main power source is connected with knife switch, and described knife switch is connected with another coil terminals of relay.Simple, the required components and parts of the utility model multiple feed selecting circuit structure are few, cost is low, meet power supply continuity, not only automatically can select power supply but also can people for intervening.
Description
Technical field
The utility model relates to the electric supply system of car kits, is specifically related to a kind of multiple feed selection circuit of car kits.
Background technology
The car kits such as caravan or automobile generally adopts multiple feed, be generally a main power source and a stand-by power supply, under normal circumstances by main power source powering load, when main power source cannot be powered, by selector switch people for being switched on stand-by power supply, also can be automatically switched on stand-by power supply by double power supply automatic switching switch common on the market.
But all there are some problems in above-mentioned power-supply switching method, be be switched to the power-off that stand-by power supply often causes the short time by selector switch people, be difficult to the continuity ensureing power supply, although double power supply automatic switching switch can meet the continuity of power supply, but complex structure, price are higher, and recoverability is poor, above-mentioned two schemes or be artificial switching in addition, be automatically switch, will artificially do not switch and automatic switchover combines.
Utility model content
The technical problems to be solved in the utility model is: provide that a kind of structure is simple, cost is low, meet power supply continuity, not only can automatically select but also can people be the multiple feed selection circuit carrying out intervening.
Technical solution of the present utility model is: provide a kind of multiple feed selection circuit, comprise main power source, stand-by power supply, relay and knife switch, the normally opened contact of described main power source cut-in relay, the normally-closed contact of described stand-by power supply cut-in relay, the moving contact of described relay is connected with power consumption equipment, the zero line of described main power source is connected with relay coil terminals, the live wire of described main power source is connected with knife switch, and described knife switch is connected with another coil terminals of relay.
After adopting said structure, the utility model has the following advantages:
Simple, the required components and parts of the utility model multiple feed selecting circuit structure are few, cost is low, after knife switch is closed, multiple feed selection circuit can select power supply automatically, when main power source has an electricity, prioritizing selection main power source is powered, when main power source cannot be powered, stand-by power supply can be automatically switched to by relay, can power supply continuity be met, also realize human intervention by operation knife switch in addition, this process also still can meet power supply continuity.
As preferably, described relay is two group contacts electromagnetic relays, the wherein normally opened contact of one group of contact of described relay is connected with the live wire of main power source, normally-closed contact is connected with the live wire of stand-by power supply, moving contact is connected with the live wire of power consumption equipment, and another group normally opened contact of contact of described relay is connected with the zero line of main power source, and normally-closed contact is connected with the zero line of stand-by power supply, moving contact is connected with the zero line of power consumption equipment, two groups of contact synchronization actions of described relay.Adopt two group contact relay, can make main power circuit and stand-by power supply loop independent, two loops are not interfere with each other, more safe and reliable.
As preferably, described main power source is that lithium battery inversion exports.Lithium battery operating voltage is high, energy density is large, self-discharge rate is low, lightweight, environmental protection, is particularly suitable for car kits.
As preferably, described stand-by power supply is civil power or generator power supply.Civil power is more common, and generator techniques is ripe, is applicable to the stand-by power supply doing car kits.
Accompanying drawing illustrates:
Fig. 1 is circuit theory diagrams of the present utility model;
In the utility model figure: 1-main power source, 2-stand-by power supply, 3-relay, 4-knife switch, the normally opened contact of 5-relay, the normally-closed contact of 6-relay, the moving contact of 7-relay, 8-power consumption equipment, the live wire of 9-main power source, the zero line of 10-main power source, the live wire of 11-stand-by power supply, the zero line of 12-stand-by power supply, the live wire of 13-power consumption equipment, the zero line of 14-power consumption equipment, 15,16-coil terminals.
Embodiment
Below in conjunction with accompanying drawing, and the utility model is described further in conjunction with the embodiments.
Embodiment:
As shown in Figure 1, a kind of multiple feed selection circuit, comprise main power source 1, stand-by power supply 2, relay 3 and knife switch 4, described relay 3 is electromagnetic relay, the zero line 10 of described main power source is connected with a coil terminals 16 of relay 3, the live wire 9 of described main power source is connected with knife switch 4, described knife switch 4 is connected with another coil terminals 15 of relay 3, during 3, described relay band, one group of contact, by the zero line of main power source, the zero line of stand-by power supply and the zero line of power consumption equipment are connected together, the live wire of the normally opened contact access main power source of relay, the live wire of the normally-closed contact access stand-by power supply of relay, the live wire of the moving contact access power consumption equipment of relay, when described relay 3 is with two groups of contacts, as shown in Figure 1, the normally opened contact 5 of wherein one group of contact of described relay 3 is connected with the live wire 9 of main power source, normally-closed contact 6 is connected with the live wire 11 of stand-by power supply, the moving contact 7 of relay is connected with the live wire 13 of power consumption equipment, another group normally opened contact 5 of contact of described relay 3 is connected with the zero line 10 of main power source, normally-closed contact 6 is connected with the zero line 12 of stand-by power supply, the moving contact 7 of relay is connected with the zero line 14 of power consumption equipment, two groups of contact synchronization actions of described relay 3, adopt the relay of two group contact, main power circuit and stand-by power supply loop can be made separately, two loops are not interfere with each other, more safe and reliable.
The course of work of above-mentioned multiple feed selection circuit is as follows: close knife switch 4, due to the coil terminals 15 by main power source 1 cut-in relay 3, 16, make selection circuit prioritizing selection main power source 1, also namely when main power source 1 has electricity, the coil of relay 3 obtains electric, normally opened contact 5 closes, normally-closed contact 6 disconnects, stand-by power supply 2 is switched to main power source 1, when main power source 1 cannot be powered, the coil losing electricity of relay 3, normally opened contact 5 disconnects, normally-closed contact 6 closes, main power source 1 is switched to stand-by power supply 2, have during electricity at main power source 1 and open knife switch 4, the coil losing electricity of relay 3, normally opened contact 5 disconnects, normally-closed contact 6 closes, main power source 1 is switched to stand-by power supply 2, if after this close knife switch 4 again, then the coil of relay 3 obtains electric, normally opened contact 5 closes, normally-closed contact 6 disconnects, stand-by power supply 2 is switched to main power source 1, so just, achieve artificial intervention, generally knife switch 4 closes, automatically power supply is selected by selection circuit, special circumstances are only had just to need manual operation knife switch 4, knife switch 4 is infrequently action.
Simple, the required components and parts of the utility model multiple feed selecting circuit structure are few, cost is low, after knife switch 4 is closed, multiple feed selection circuit can select power supply automatically, when main power source 1 has an electricity, prioritizing selection main power source 1 is powered, when main power source 1 cannot be powered, stand-by power supply 2 can be automatically switched to by relay 3, can power supply continuity be met, also realize human intervention by operation knife switch 4 in addition, this process also still can meet power supply continuity.
As preferably, described main power source 1 is that lithium battery inversion exports.Lithium battery operating voltage is high, energy density is large, self-discharge rate is low, lightweight, environmental protection, is particularly suitable for car kits.
As preferably, described stand-by power supply 2 is civil power or generator power supply.Civil power is more common, and generator techniques is ripe, is applicable to the stand-by power supply doing car kits.
Claims (4)
1. a multiple feed selection circuit, comprise main power source (1) and stand-by power supply (2), it is characterized in that: also comprise relay (3) and knife switch (4), the normally opened contact (5) of described main power source (1) cut-in relay, the normally-closed contact (6) of described stand-by power supply (2) cut-in relay, the moving contact (7) of described relay is connected with power consumption equipment (8), the zero line (10) of described main power source is connected with a coil terminals (16) of relay (3), the live wire (9) of described main power source is connected with knife switch (4), described knife switch (4) is connected with another coil terminals (15) of relay (3).
2. a kind of multiple feed selection circuit according to claim 1, it is characterized in that: described relay (3) is two group contacts electromagnetic relay, the normally opened contact (5) of wherein one group of contact of described relay (3) is connected with the live wire (9) of main power source, normally-closed contact (6) is connected with the live wire (11) of stand-by power supply, the moving contact (7) of relay is connected with the live wire (13) of power consumption equipment, another group normally opened contact (5) of contact of described relay (3) is connected with the zero line (10) of main power source, normally-closed contact (6) is connected with the zero line (12) of stand-by power supply, the moving contact (7) of relay is connected with the zero line (14) of power consumption equipment, two groups of contact synchronization actions of described relay (3).
3. a kind of multiple feed selection circuit according to claim 1, is characterized in that: described main power source (1) is lithium battery inversion output.
4. a kind of multiple feed selection circuit according to claim 1, is characterized in that: described stand-by power supply (2) is civil power or generator power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520046711.2U CN204376520U (en) | 2015-01-23 | 2015-01-23 | A kind of multiple feed selection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520046711.2U CN204376520U (en) | 2015-01-23 | 2015-01-23 | A kind of multiple feed selection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204376520U true CN204376520U (en) | 2015-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520046711.2U Expired - Fee Related CN204376520U (en) | 2015-01-23 | 2015-01-23 | A kind of multiple feed selection circuit |
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| Country | Link |
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| CN (1) | CN204376520U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105610239A (en) * | 2016-02-22 | 2016-05-25 | 黄焕珠 | Automatic input device of emergency power supply |
| CN106410956A (en) * | 2016-11-08 | 2017-02-15 | 中车大连电力牵引研发中心有限公司 | High voltage switching switch and metro vehicle |
| CN108258798A (en) * | 2018-02-28 | 2018-07-06 | 上思县东岽电子科技有限责任公司 | A kind of artificial illumination dual power supply and automatic throw-in equipment |
| CN110224405A (en) * | 2019-07-12 | 2019-09-10 | 威创集团股份有限公司 | The switching device and method of more power grids |
-
2015
- 2015-01-23 CN CN201520046711.2U patent/CN204376520U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105610239A (en) * | 2016-02-22 | 2016-05-25 | 黄焕珠 | Automatic input device of emergency power supply |
| CN106410956A (en) * | 2016-11-08 | 2017-02-15 | 中车大连电力牵引研发中心有限公司 | High voltage switching switch and metro vehicle |
| CN108258798A (en) * | 2018-02-28 | 2018-07-06 | 上思县东岽电子科技有限责任公司 | A kind of artificial illumination dual power supply and automatic throw-in equipment |
| CN110224405A (en) * | 2019-07-12 | 2019-09-10 | 威创集团股份有限公司 | The switching device and method of more power grids |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150603 Termination date: 20160123 |
|
| EXPY | Termination of patent right or utility model |