CN204012703U - Circuit is corrected in a kind of DC power supply reversal connection automatically - Google Patents
Circuit is corrected in a kind of DC power supply reversal connection automatically Download PDFInfo
- Publication number
- CN204012703U CN204012703U CN201420394871.1U CN201420394871U CN204012703U CN 204012703 U CN204012703 U CN 204012703U CN 201420394871 U CN201420394871 U CN 201420394871U CN 204012703 U CN204012703 U CN 204012703U
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- relay
- switch
- diode
- supply input
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Abstract
The utility model relates to a kind of circuit, and particularly circuit is corrected in a kind of DC power supply reversal connection automatically.It is characterized in that: one end of DC supply input respectively with the normally-closed contact of relay the first switch, the normally opened contact of relay second switch is connected, the other end of DC supply input respectively with the normally opened contact of relay the first switch, the normally-closed contact of relay second switch is connected, after different two the light-emitting diode reverse parallel connections of the first color and the series connection of the first resistance, be connected on again the two ends of DC supply input, buzzer, the 3rd diode, one end after relay coil parallel connection is connected with the normally-closed contact of relay the first switch by the first diode, the other end is connected with the normally opened contact of relay the first switch, the center-side of relay the first switch is connected by the positive pole of fuse and DC power output end.Owing to adopting technique scheme, advantage and good effect that the utility model has are: circuit is simple, economical and practical.
Description
Technical field
The utility model relates to a kind of circuit, and particularly circuit is corrected in a kind of DC power supply reversal connection automatically.
Background technology
When a kind of electrical equipment is in the time using DC power supply, if reverse polarity connection will damage electrical equipment, when serious, also can there is security incident.
Summary of the invention
Technical problem to be solved in the utility model is: provide a kind of DC power supply reversal connection automatically to correct circuit, the DC power supply of reversal connection can be corrected automatically.
The utility model solves the technical scheme that its technical problem adopts: the utility model is by DC supply input, DC power output end, two light-emitting diode reverse parallel connections that the first color is different, two light-emitting diode reverse parallel connections that the second color is different, the first resistance, the second resistance, buzzer, the first diode, the second diode, the 3rd diode, relay, relay the first switch, relay second switch and fuse composition, is characterized in that: one end of DC supply input respectively with the normally-closed contact of relay the first switch, the normally opened contact of relay second switch is connected, the other end of DC supply input respectively with the normally opened contact of relay the first switch, the normally-closed contact of relay second switch is connected, and after different two the light-emitting diode reverse parallel connections of the first color and the series connection of the first resistance, then is connected on the two ends of DC supply input, buzzer, the 3rd diode, one end after relay coil parallel connection is connected with the normally-closed contact of relay the first switch by the first diode, the other end is connected with the normally opened contact of relay the first switch, the center-side of relay the first switch is connected by the positive pole of fuse and DC power output end, the center-side of relay second switch is connected with the negative pole of DC power output end, after different two the light-emitting diode reverse parallel connections of the second color and the series connection of the second resistance, the two ends that are connected on again DC supply input by fuse, the second diode is connected on the two ends of DC supply input.
Owing to adopting technique scheme, advantage and good effect that the utility model has are: circuit is simple, economical and practical.
Brief description of the drawings
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Figure of description 1 is circuit theory diagrams of the present utility model.
V1. DC supply input in figure, V2. DC power output end, two light-emitting diode reverse parallel connections that L1. the first color is different, L2. two different light-emitting diode reverse parallel connections of the second color, R1. the first resistance, R2. the second resistance, P. buzzer, D1. the first diode, D2. the second diode, D3. the 3rd diode, K. relay, K-1. relay the first switch, K-2. relay second switch, F. fuse.
Embodiment
In Figure of description, one end of DC supply input (V1) respectively with the normally-closed contact of relay the first switch (K-1), the normally opened contact of relay second switch (K-2) is connected, the other end of DC supply input (V1) respectively with the normally opened contact of relay the first switch (K-1), the normally-closed contact of relay second switch (K-2) is connected, two light-emitting diode reverse parallel connections (L1) that the first color is different are connected with the first resistance (R1) afterwards, be connected on again the two ends of DC supply input (V1), buzzer (P), the 3rd diode (D3), one end after relay (K) coils from parallel connection of coils is connected with the normally-closed contact of relay the first switch (K-1) by the first diode (D1), the other end is connected with the normally opened contact of relay the first switch (K-1), the center-side of relay the first switch (K-1) is connected with the positive pole of DC power output end (V2) by fuse (F), the center-side of relay second switch (K-2) is connected with the negative pole of DC power output end (V2), two light-emitting diode reverse parallel connections (L2) that the second color is different are connected with the second resistance (R2) afterwards, be connected on again the two ends of DC supply input (V2) by fuse (F), the second diode (D2) is connected on the two ends of DC supply input (V2).
The utility model circuit function and principle are: control device is a relay (K), it by first diode (D1) make coil become can only one-way only operation relay, it is connected across to DC supply input (V1), and the DC power output end of connecting circuit (V2) is connected to power supply through relay the first switch (K-1) contact, relay second switch (K-2) contact of fuse (F) and relay (K).In the time that the input polarity of DC supply input (V1) is correct, all green light of diode of two light-emitting diode reverse parallel connections (L1) that the first color is different two light-emitting diode reverse parallel connections (L2) different with the second color, represent that polarity is correct, as diode glows, represent that polarity is contrary, in the time that the input polarity of DC supply input (V1) is contrary, relay (K) coil is through the first diode (D1) adhesive, after its pair of contact action, output polarity is exchanged immediately, meanwhile, buzzer (P) obtains positively biased and luminous alarm sound through the first diode (D1).
Claims (1)
1. circuit is corrected in a DC power supply reversal connection automatically, by DC supply input, DC power output end, two light-emitting diode reverse parallel connections that the first color is different, two light-emitting diode reverse parallel connections that the second color is different, the first resistance, the second resistance, buzzer, the first diode, the second diode, the 3rd diode, relay, relay the first switch, relay second switch and fuse composition, it is characterized in that: one end of DC supply input (V1) respectively with the normally-closed contact of relay the first switch (K-1), the normally opened contact of relay second switch (K-2) is connected, the other end of DC supply input (V1) respectively with the normally opened contact of relay the first switch (K-1), the normally-closed contact of relay second switch (K-2) is connected, two light-emitting diode reverse parallel connections (L1) that the first color is different are connected with the first resistance (R1) afterwards, be connected on again the two ends of DC supply input (V1), buzzer (P), the 3rd diode (D3), one end after relay (K) coils from parallel connection of coils is connected with the normally-closed contact of relay the first switch (K-1) by the first diode (D1), the other end is connected with the normally opened contact of relay the first switch (K-1), the center-side of relay the first switch (K-1) is connected with the positive pole of DC power output end (V2) by fuse (F), the center-side of relay second switch (K-2) is connected with the negative pole of DC power output end (V2), two light-emitting diode reverse parallel connections (L2) that the second color is different are connected with the second resistance (R2) afterwards, be connected on again the two ends of DC supply input (V2) by fuse (F), the second diode (D2) is connected on the two ends of DC supply input (V2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420394871.1U CN204012703U (en) | 2014-07-10 | 2014-07-10 | Circuit is corrected in a kind of DC power supply reversal connection automatically |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420394871.1U CN204012703U (en) | 2014-07-10 | 2014-07-10 | Circuit is corrected in a kind of DC power supply reversal connection automatically |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204012703U true CN204012703U (en) | 2014-12-10 |
Family
ID=52052645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420394871.1U Expired - Fee Related CN204012703U (en) | 2014-07-10 | 2014-07-10 | Circuit is corrected in a kind of DC power supply reversal connection automatically |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204012703U (en) |
-
2014
- 2014-07-10 CN CN201420394871.1U patent/CN204012703U/en not_active Expired - Fee Related
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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: 20141210 Termination date: 20150710 |
|
| EXPY | Termination of patent right or utility model |