CN212304746U - Reverse connection prevention protection circuit - Google Patents
Reverse connection prevention protection circuit Download PDFInfo
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- CN212304746U CN212304746U CN202021309121.1U CN202021309121U CN212304746U CN 212304746 U CN212304746 U CN 212304746U CN 202021309121 U CN202021309121 U CN 202021309121U CN 212304746 U CN212304746 U CN 212304746U
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Abstract
The utility model discloses a prevent reverse connection protection circuit, include control signal end, triode, relay, prevent reverse connection diode and drive circuit, the control signal end is connected with the base of triode, the projecting pole ground connection of triode, the collecting electrode of triode passes through the relay is connected prevent the positive pole of reverse connection diode and the positive pole of power, prevent that reverse connection diode's negative pole passes through drive circuit is connected with the negative pole of power, drive circuit's output with control signal end signal connection, the negative pole ground connection of power. When the power supply is connected positively, the reverse connection prevention diode supplies power to the driving circuit, signals output by the driving circuit can be disconnected with the electrical connection between the reverse connection prevention diode and the power supply through the triode and the relay, the reverse connection prevention diode is switched from the running state to the idle state, the overall power consumption of the reverse connection prevention protection circuit is reduced, heat energy generated in the circuit can be reduced, and the current environment-friendly concept is met.
Description
Technical Field
The utility model relates to a power electronic technology field especially relates to an anti-reverse connection protection circuit.
Background
In an existing power system or circuit, in order to damage a circuit when a direct current input is accidentally reversely connected, a power diode is generally required to be connected in series on an input line, the power diode is large in size, power loss of the power diode in the circuit is relatively serious, especially, under the development trend of high power of a power supply, the power lost by the power diode is more serious, and in addition, the power diode with high power can also generate a large amount of heat energy, so that the use requirement of a user is difficult to meet.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: an anti-reverse connection protection circuit with low power consumption is provided.
In order to solve the technical problem, the utility model discloses a technical scheme be: the utility model provides a prevent reverse connection protection circuit, includes control signal end, triode, relay, prevents reverse connection diode and drive circuit, the control signal end is connected with the base of triode, the projecting pole ground connection of triode, the collecting electrode of triode passes through the relay is connected prevent reverse connection diode's positive pole and the positive pole of power, prevent reverse connection diode's negative pole through drive circuit is connected with the negative pole of power, drive circuit's output with control signal end signal connection, the negative pole ground connection of power.
Furthermore, the power supply also comprises a filter connected with the power supply, and the filter is arranged between the power supply and the reverse connection prevention diode.
Furthermore, the driving circuit comprises an output interface, and a first resistor and a first capacitor which are connected in series, wherein the output interface is arranged at the joint of the first resistor and the first capacitor, and the output interface is in signal connection with the control signal end.
Further, the high-voltage power supply further comprises a voltage stabilizing diode, wherein the anode of the voltage stabilizing diode is connected with the cathode of the first capacitor, and the cathode of the voltage stabilizing diode is connected with the anode of the first capacitor.
Further, the positive electrode of the first capacitor is connected to the output interface and the first resistor, and the negative electrode of the first capacitor is grounded.
The triode is characterized by further comprising a clamping diode and an auxiliary voltage end, wherein the collector electrode of the triode is sequentially connected with the clamping diode and the auxiliary voltage end.
Furthermore, a bias resistor is arranged between the emitting electrode and the collecting electrode of the triode.
Furthermore, a second capacitor is connected in series between the positive electrode and the negative electrode of the power supply.
Furthermore, the driving circuit further comprises a second resistor, wherein one end of the second resistor is connected with the cathode of the reverse connection prevention diode, and the other end of the second resistor is connected with the driving circuit.
The beneficial effects of the utility model reside in that: when the power supply is connected positively, the reverse connection prevention diode supplies power to the driving circuit, signals output by the driving circuit can be disconnected with the electrical connection between the reverse connection prevention diode and the power supply through the triode and the relay, the reverse connection prevention diode is switched from the running state to the idle state, the overall power consumption of the reverse connection prevention protection circuit is reduced, heat energy generated in the circuit can be reduced, and the current environment-friendly concept is met.
Drawings
Fig. 1 is a circuit diagram of a reverse connection protection circuit according to a first embodiment of the present invention.
Description of reference numerals:
r1, a first resistor; r2, a second resistor; r3, bias resistor; V-DRV, control signal terminal;
q, a triode; K. a relay; d1, an anti-reverse diode; d2, zener diode;
d3, clamp diode; c1, a first capacitance; c2, a second capacitance.
Detailed Description
In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
The utility model discloses the most crucial design lies in: the power supply supplies power to the driving circuit through the reverse connection prevention diode, and after the driving circuit operates, the relay is attracted and short-circuits the reverse connection prevention diode, so that the overall power consumption of the reverse connection prevention protection circuit is reduced.
Referring to fig. 1, an anti-reverse connection protection circuit includes a control signal terminal V-DRV, a transistor Q, a relay K, an anti-reverse connection diode D1, and a driving circuit, where the control signal terminal V-DRV is connected to a base of the transistor Q, an emitter of the transistor Q is grounded, a collector of the transistor Q is connected to an anode of the anti-reverse connection diode D1 and a positive electrode of a power supply through the relay K, a cathode of the anti-reverse connection diode D1 is connected to a negative electrode of the power supply through the driving circuit, an output terminal of the driving circuit is connected to the control signal terminal V-DRV in a signal connection, and a negative electrode of the power supply is grounded.
The working principle of the utility model is as follows: the power supply supplies power to the drive circuit through the reverse connection prevention diode, the drive circuit outputs a control signal after running, the triode is conducted under the action of the control signal, then the relay is attracted, the conduction circuit between the power supply and the reverse connection prevention diode is disconnected, and the overall power consumption of the reverse connection prevention protection circuit is reduced.
From the above description, the beneficial effects of the present invention are: when the power supply is connected positively, the reverse connection prevention diode supplies power to the driving circuit, signals output by the driving circuit can be disconnected with the electrical connection between the reverse connection prevention diode and the power supply through the triode and the relay, the reverse connection prevention diode is switched from the running state to the idle state, the overall power consumption of the reverse connection prevention protection circuit is reduced, heat energy generated in the circuit can be reduced, and the current environment-friendly concept is met.
Further, the power supply circuit also comprises a filter connected with the power supply, and the filter is arranged between the power supply and the reverse connection prevention diode D1.
From the above description, the filter can effectively filter the frequency point of the specific frequency in the power supply or the frequencies except the frequency point.
Further, the driving circuit comprises an output interface, and a first resistor R1 and a first capacitor C1 which are connected in series, wherein the output interface is arranged at the connection position of the first resistor R1 and the first capacitor C1, and the output interface is connected with the control signal terminal V-DRV through a signal.
Further, the voltage stabilizing diode D2 is included, an anode of the voltage stabilizing diode D2 is connected to the cathode of the first capacitor C1, and a cathode of the voltage stabilizing diode D2 is connected to the anode of the first capacitor C1.
From the above description, in the operating process of the circuit, the voltage variation range at the two ends of the voltage stabilizing diode is very small, and the voltage of the first capacitor can be kept stable.
Furthermore, the positive electrode of the first capacitor C1 is connected to the output interface and the first resistor R1, and the negative electrode of the first capacitor C1 is grounded.
Further, the triode Q further comprises a clamping diode D3 and an auxiliary voltage end, and the collector of the triode Q is sequentially connected with the clamping diode D3 and the auxiliary voltage end.
From the above description, the clamping diode effectively raises the voltage to the voltage level of the auxiliary voltage terminal, and improves the stability of the circuit.
Further, a bias resistor R3 is arranged between the emitter and the collector of the triode Q.
Further, a second capacitor C2 is connected in series between the positive electrode and the negative electrode of the power supply.
Furthermore, the driving circuit further comprises a second resistor R2, wherein one end of the second resistor R2 is connected with the cathode of the anti-reverse diode D1, and the other end of the second resistor R2 is connected with the driving circuit.
From the above description, the second resistor is used as a current-limiting resistor in the main circuit, which can effectively regulate and control the total current in the circuit and improve the safety performance of the circuit.
Example one
Referring to fig. 1, a first embodiment of the present invention is: the utility model provides an anti-reverse connection protection circuit, includes control signal end V-DRV, triode Q, relay K, prevents reverse connection diode D1 and drive circuit, control signal end V-DRV is connected with triode Q's base, triode Q's projecting pole ground connection, triode Q's collecting electrode passes through relay K connects prevent reverse connection diode D1's positive pole and the positive pole of power, prevent reverse connection diode D1's negative pole through drive circuit is connected with the negative pole of power, drive circuit's output with control signal end V-DRV signal connection, the negative pole ground connection of power.
In detail, the driving circuit comprises an output interface, and a first resistor R1 and a first capacitor C1 which are connected in series, wherein the output interface is arranged at the connection position of the first resistor R1 and the first capacitor C1, and the output interface is connected with the control signal terminal V-DRV through a signal. Specifically, the capacitor further includes a zener diode D2, an anode of the zener diode D2 is connected to a cathode of the first capacitor C1, a cathode of the zener diode D2 is connected to an anode of the first capacitor C1, that is, an anode of the first capacitor C1 is connected to the output interface and the first resistor R1, and a cathode of the first capacitor C1 is grounded, in this embodiment, the first capacitor C1 is an electrolytic capacitor, and the second capacitor C1 is a bus capacitor.
Referring to fig. 1, the device further includes a clamping diode D3 and an auxiliary voltage terminal, wherein a collector of the transistor Q is sequentially connected to the clamping diode D3 and the auxiliary voltage terminal, and in this embodiment, the auxiliary voltage is + 12V.
Optionally, a bias resistor R3 is disposed between an emitter and a collector of the triode Q, a second capacitor C2 is connected in series between a positive electrode and a negative electrode of the power supply, and preferably, the triode Q further includes a second resistor R2, one end of the second resistor R2 is connected to a cathode of the reverse-connection-prevention diode D1, and the other end of the second resistor R2 is connected to the driving circuit.
In detail, a filter connected to the power supply is further included, and the filter is disposed between the power supply and the anti-reverse diode D1, and the related art of the filter in this embodiment is well known to those skilled in the art.
The working principle of the embodiment is briefly described as follows: when the power supply is connected positively, the power supply supplies power to the driving circuit through the reverse connection prevention diode D1 and the second resistor R2, the second capacitor C2 and the first capacitor C1 in the driving circuit are charged, when the voltage of the first capacitor C1 rises to a level that the subsequent system can be driven to operate, the driving circuit also generates a control signal, the control signal (namely a control signal end V-DRV) is connected with the base electrode of the triode Q and used for conducting the triode Q, the triode Q forms a circuit loop after being conducted, a relay K in the loop is electrified and attracted, so that the electrical connection between the reverse connection prevention diode D1 and the power supply is disconnected, and the reverse connection prevention diode D1 is in a zero-loss state, and the total loss of the circuit can be effectively reduced. When the power supply is reversely connected, the reverse connection prevention diode D1 is cut off, the power supply cannot effectively supply power to the circuit, and the circuit is protected from being damaged.
To sum up, the utility model provides a, when the power is just connecing, through preventing that reverse connection diode supplies power to drive circuit, the signal of drive circuit output can also prevent through triode and relay disconnection that reverse connection diode and power between the electrical connection will prevent reverse connection diode from the running state switch to idle state, reduces the whole consumption of preventing reverse connection protection circuit, can also reduce the heat energy that produces in the circuit, accords with current environmental protection theory.
The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.
Claims (9)
1. An anti-reverse connection protection circuit, characterized in that: the power supply comprises a control signal end, a triode, a relay, an anti-reverse diode and a driving circuit, wherein the control signal end is connected with the base electrode of the triode, the emitting electrode of the triode is grounded, the collecting electrode of the triode is connected with the anode of the anti-reverse diode and the anode of the power supply through the relay, the cathode of the anti-reverse diode is connected with the cathode of the power supply through the driving circuit, the output end of the driving circuit is in signal connection with the control signal end, and the cathode of the power supply is grounded.
2. The reverse-connection prevention protection circuit according to claim 1, characterized in that: the power supply also comprises a filter connected with the power supply, and the filter is arranged between the power supply and the reverse connection prevention diode.
3. The reverse-connection prevention protection circuit according to claim 1, characterized in that: the driving circuit comprises an output interface, a first resistor and a first capacitor which are connected in series, the output interface is arranged at the joint of the first resistor and the first capacitor, and the output interface is in signal connection with the control signal end.
4. The reverse-connection prevention protection circuit according to claim 3, characterized in that: the capacitor further comprises a voltage stabilizing diode, wherein the anode of the voltage stabilizing diode is connected with the cathode of the first capacitor, and the cathode of the voltage stabilizing diode is connected with the anode of the first capacitor.
5. The reverse-connection prevention protection circuit according to claim 3, characterized in that: the positive electrode of the first capacitor is connected with the output interface and the first resistor respectively, and the negative electrode of the first capacitor is grounded.
6. The reverse-connection prevention protection circuit according to claim 1, characterized in that: the triode is characterized by further comprising a clamping diode and an auxiliary voltage end, and a collector of the triode is sequentially connected with the clamping diode and the auxiliary voltage end.
7. The reverse-connection prevention protection circuit according to claim 1, characterized in that: and a bias resistor is arranged between the emitting electrode and the collecting electrode of the triode.
8. The reverse-connection prevention protection circuit according to claim 1, characterized in that: and a second capacitor is connected in series between the positive electrode and the negative electrode of the power supply.
9. The reverse-connection prevention protection circuit according to claim 1, characterized in that: the driving circuit further comprises a second resistor, one end of the second resistor is connected with the cathode of the reverse connection prevention diode, and the other end of the second resistor is connected with the driving circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021309121.1U CN212304746U (en) | 2020-07-06 | 2020-07-06 | Reverse connection prevention protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021309121.1U CN212304746U (en) | 2020-07-06 | 2020-07-06 | Reverse connection prevention protection circuit |
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| Publication Number | Publication Date |
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| CN212304746U true CN212304746U (en) | 2021-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021309121.1U Active CN212304746U (en) | 2020-07-06 | 2020-07-06 | Reverse connection prevention protection circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113258552A (en) * | 2021-06-23 | 2021-08-13 | 阳光电源股份有限公司 | Reverse connection prevention control circuit and application device thereof |
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2020
- 2020-07-06 CN CN202021309121.1U patent/CN212304746U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113258552A (en) * | 2021-06-23 | 2021-08-13 | 阳光电源股份有限公司 | Reverse connection prevention control circuit and application device thereof |
| CN113258552B (en) * | 2021-06-23 | 2024-02-09 | 阳光电源股份有限公司 | Reverse connection prevention control circuit and application device thereof |
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