CN212083534U - Indicating circuit for power output short circuit and overload - Google Patents
Indicating circuit for power output short circuit and overload Download PDFInfo
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- CN212083534U CN212083534U CN202020403955.2U CN202020403955U CN212083534U CN 212083534 U CN212083534 U CN 212083534U CN 202020403955 U CN202020403955 U CN 202020403955U CN 212083534 U CN212083534 U CN 212083534U
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Abstract
The utility model discloses an indicating circuit for short circuit and overload of power output, the power output end is connected with the back-end equipment, an indicating circuit is connected between the power output end and the back-end equipment, the power output end is provided with a transformer winding, and the transformer winding is connected with the back-end equipment through a reverse power supply mode; the indicating circuit comprises a voltage detecting circuit, a prompting circuit and a power supply circuit; the prompting circuit comprises a normal prompting circuit and an abnormal prompting circuit, the transformer winding is connected with the input end of the power supply circuit in a forward power supply mode, the output end of the power supply circuit is connected with the abnormal prompting circuit, the input ends of the normal prompting circuit and the voltage detection circuit are respectively connected with the output end of the transformer winding, and the output end of the voltage detection circuit is connected with the abnormal prompting circuit. The user can conveniently judge the fault of the power output end and prompt the user.
Description
Technical Field
The utility model relates to a power output technical field, in particular to an indicating circuit that is used for power output short circuit and transships.
Background
In the prior art, the output of a power supply, a switching power supply, a charger, an inverter and a power conversion device has no short circuit or overload indication, when an output end connecting line is wrong, the power supply has a fault or power output rear-end equipment has a fault, the judgment of the connection error, the power supply fault or the rear-end equipment fault is difficult, a professional technician needs to use a professional detection device to judge, and great inconvenience is brought to a user.
Accordingly, the prior art is deficient and needs improvement.
SUMMERY OF THE UTILITY MODEL
The utility model provides an indicating circuit for power output short circuit and overload aims at the person of facilitating the use and judges power output end trouble, indicates the user.
In order to achieve the above object, the present invention provides an indicating circuit for short circuit and overload of power output, wherein the power output end is connected to a back-end device, an indicating circuit is connected between the power output end and the back-end device, the power output end is provided with a transformer winding, and the transformer winding is connected to the back-end device through a reverse power supply manner; the indicating circuit comprises a voltage detecting circuit, a prompting circuit and a power supply circuit, wherein the voltage detecting circuit is used for detecting the voltage of the output end of the power supply and sending voltage detection information; the prompting circuit comprises a normal prompting circuit and an abnormal prompting circuit, the transformer winding is connected with the input end of the power supply circuit in a forward power supply mode, the output end of the power supply circuit is connected with the abnormal prompting circuit, the input ends of the normal prompting circuit and the voltage detection circuit are respectively connected with the output end of the transformer winding, and the output end of the voltage detection circuit is connected with the abnormal prompting circuit.
Preferably, the power supply circuit includes a first rectifying diode and a first energy-storage capacitor, the first energy-storage capacitor is connected in parallel with the transformer winding, an input end of the first rectifying diode is connected with the first energy-storage capacitor and the transformer winding, and an output end of the first rectifying diode is connected with the abnormality prompt circuit.
Preferably, the abnormality prompt circuit includes a first light emitting diode, a first transistor, a first resistor and a second resistor, the base of the first transistor is connected to one end of the first resistor, the other end of the first resistor is connected to the output end of the first rectifier diode, the collector of the first transistor is connected to the output end of the first rectifier diode, the emitter of the first transistor is connected to one end of the second resistor, the other end of the second resistor is connected to the input end of the first light emitting diode, and the output end of the first light emitting diode is grounded.
Preferably, the voltage detection circuit includes a second transistor and a third resistor, one end of the third resistor is connected to the transformer winding, the other end of the third resistor is connected to the base of the second transistor, the collector of the second transistor is connected to the base of the first transistor, and the transmitter of the second transistor is grounded.
Preferably, the normal prompt circuit comprises a fourth resistor and a second light emitting diode, one end of the fourth resistor is connected with the transformer winding, the other end of the fourth resistor is connected with the input end of the second light emitting diode, and the output end of the second light emitting diode is grounded.
Preferably, a second energy storage capacitor and a third energy storage capacitor are connected in parallel between the transformer winding and the rear-end device, a second rectifier diode and a third rectifier diode are further connected between the second energy storage capacitor, the third energy storage capacitor and the transformer winding, and the second rectifier diode and the third rectifier diode are arranged in parallel.
Compared with the prior art, the beneficial effects of the utility model are that: the power output is monitored in real time by arranging the indicating circuit for short circuit and overload detection between the power output end and the rear-end equipment, and different working states of the power output are prompted by setting the normal prompting circuit and the abnormal prompting circuit, so that a user is prompted to help the user diagnose circuit faults.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic block diagram of the power output end of the present invention;
FIG. 2 is a schematic diagram of the power output end circuit of the present invention;
the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The utility model provides an indicating circuit for power output short circuit and overload, refer to fig. 1, power output end is connected with back-end equipment 1, connect an indicating circuit between power output end and back-end equipment 1, power output end is equipped with a transformer winding L, transformer winding L through reverse power supply mode with back-end equipment 1 is connected; the indicating circuit comprises a voltage detecting circuit 2 for detecting the voltage of the output end of the power supply and sending voltage detection information, a prompting circuit for receiving the voltage detection information and prompting a user, and a power supply circuit 3 for supplying power to the prompting circuit; the prompting circuit comprises a normal prompting circuit 4 and an abnormal prompting circuit 5, the transformer winding L is connected with the input end of the power supply circuit 3 in a forward power supply mode, the output end of the power supply circuit 3 is connected with the abnormal prompting circuit 5, the normal prompting circuit 4 and the input end of the voltage detection circuit 2 are respectively connected with the output end of the transformer winding L, and the output end of the voltage detection circuit 2 is connected with the abnormal prompting circuit 5.
It should be noted that the normal prompt circuit 4 is connected to the voltage output terminal, and prompts the user when the power supply output is normal. When the power supply output is short-circuited or overloaded, the output voltage is reduced by a lot, even to 0V, so the voltage detection circuit 2 can identify the reduction of the output voltage or 0V, and send the voltage detection signal to the abnormality prompting circuit 5 to prompt the user. The normal prompt circuit 4 and the abnormal prompt circuit 5 may respectively include an independently packaged led, or may include a plurality of leds packaged together. Further, after the power output is overloaded or short-circuited, the voltage is very low or even 0, so that the normal prompt circuit 4 and the abnormal prompt circuit 5 cannot be supplied with power, the abnormal prompt circuit 5 can be normally supplied with power by arranging the Yita power supply circuit 3, and the abnormal prompt circuit 5 is lightened to prompt a circuit fault of a user. It should be noted that the voltage output terminal supplies power to the back-end device 1 in a reverse power supply manner, and supplies power to the power supply circuit 3 in a forward power supply manner, so that even if the power output is short-circuited or overloaded, the voltage output terminal is not affected to supply power to the abnormality indication circuit 5 through the power supply circuit 3.
Referring to fig. 2, the power supply circuit 3 includes a first rectifying diode D10 and a first energy-storage capacitor C15, the first energy-storage capacitor C15 is connected in parallel with the transformer winding L, an input end of the first rectifying diode D10 is connected to the first energy-storage capacitor C15 and the transformer winding L, and an output end of the first rectifying diode D10 is connected to the abnormality prompt circuit 5.
Further, the abnormality prompt circuit 5 includes a first light emitting diode LED2, a first transistor Q2, a first resistor R31 and a second resistor R30, a base of the first transistor Q2 is connected to one end of the first resistor R31, the other end of the first resistor R31 is connected to an output end of the first rectifying diode D10, a collector of the first transistor Q2 is connected to an output end of the first rectifying diode D10, an emitter of the first transistor Q2 is connected to one end of the second resistor R30, the other end of the second resistor R30 is connected to an input end of the first light emitting diode LED2, and an output end of the first light emitting diode LED2 is grounded.
Further, the voltage detection circuit 2 includes a second transistor Q3 and a third resistor R32, one end of the third resistor R32 is connected to the transformer winding L, the other end of the third resistor R32 is connected to the base of the second transistor Q3, the collector of the second transistor Q3 is connected to the base of the first transistor Q2, and the transmitter of the second transistor Q3 is grounded.
Further, the normal prompt circuit 4 includes a fourth resistor R33 and a second light emitting diode LED1, one end of the fourth resistor R33 is connected to the transformer winding L, the other end of the fourth resistor R33 is connected to the input end of the second light emitting diode LED1, and the output end of the second light emitting diode LED1 is grounded.
Further, a second energy storage capacitor C10 and a third energy storage capacitor C11 are connected in parallel between the transformer winding L and the rear-end device 1, a second rectifier diode D8 and a third rectifier diode D9 are further connected between the second energy storage capacitor C10, the third energy storage capacitor C11 and the transformer winding L, and the second rectifier diode D8 and the third rectifier diode D9 are arranged in parallel.
When the voltage output is normal, the output voltage of the voltage output end is high potential, the input end of the second light emitting diode LED1 is high potential, and the second light emitting diode LED1 is powered and lightened through the fourth resistor R33 to prompt a user that the voltage output is normal. At this time, the base of the second transistor Q3 is biased to be turned on by the third resistor R32, so the base of the second transistor Q3 is at a high potential, the base of the first transistor Q2 is at a low potential, the input terminal of the first light emitting diode LED2 is at a low potential, and the first light emitting diode LED2 is not turned on.
When the voltage output is overloaded or short-circuited, the output voltage of the voltage output terminal is at a low potential, the input terminal of the second light emitting diode LED1 is at a low potential, and the second light emitting diode LED1 is not lit. At this time, the base bias voltage of the second transistor Q3 is reduced, so the base of the second transistor Q3 is at a low potential, the base of the first transistor Q2 is at a high potential, the first transistor Q2 is turned on, the input terminal of the first light emitting diode LED2 is at a high potential, and the first light emitting diode LED2 is turned on to prompt the user that the voltage output is abnormal.
The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.
Claims (6)
1. An indicating circuit for short circuit and overload of power output is disclosed, wherein the power output end is connected with a back-end device, and an indicating circuit is connected between the power output end and the back-end device; the indicating circuit comprises a voltage detecting circuit, a prompting circuit and a power supply circuit, wherein the voltage detecting circuit is used for detecting the voltage of the output end of the power supply and sending voltage detection information; the prompting circuit comprises a normal prompting circuit and an abnormal prompting circuit, the transformer winding is connected with the input end of the power supply circuit in a forward power supply mode, the output end of the power supply circuit is connected with the abnormal prompting circuit, the input ends of the normal prompting circuit and the voltage detection circuit are respectively connected with the output end of the transformer winding, and the output end of the voltage detection circuit is connected with the abnormal prompting circuit.
2. The indicating circuit for power supply output short and overload of claim 1, wherein the power supply circuit includes a first rectifying diode and a first energy storage capacitor, the first energy storage capacitor is connected in parallel with the transformer winding, an input end of the first rectifying diode is connected with the first energy storage capacitor and the transformer winding, and an output end of the first rectifying diode is connected with the abnormality prompting circuit.
3. The indicating circuit for power output short and overload of claim 2, wherein the abnormality indication circuit includes a first light emitting diode, a first transistor, a first resistor and a second resistor, wherein a base of the first transistor is connected to one end of the first resistor, the other end of the first resistor is connected to an output end of the first rectifying diode, a collector of the first transistor is connected to an output end of the first rectifying diode, an emitter of the first transistor is connected to one end of the second resistor, the other end of the second resistor is connected to an input end of the first light emitting diode, and an output end of the first light emitting diode is grounded.
4. The indication circuit for power output short and overload of claim 3, wherein the voltage detection circuit includes a second transistor and a third resistor, one end of the third resistor is connected to the transformer winding, the other end of the third resistor is connected to the base of the second transistor, the collector of the second transistor is connected to the base of the first transistor, and the transmitter of the second transistor is grounded.
5. The indicating circuit for power output short and overload of claim 1, wherein the normal prompt circuit includes a fourth resistor and a second light emitting diode, one end of the fourth resistor is connected to the transformer winding, the other end of the fourth resistor is connected to the input end of the second light emitting diode, and the output end of the second light emitting diode is grounded.
6. The indicating circuit for short circuit and overload of power output as claimed in claim 1, wherein a second energy storage capacitor and a third energy storage capacitor are connected in parallel between the transformer winding and the back end device, a second rectifying diode and a third rectifying diode are connected between the second energy storage capacitor and the transformer winding, and the second rectifying diode and the third rectifying diode are connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020403955.2U CN212083534U (en) | 2020-03-25 | 2020-03-25 | Indicating circuit for power output short circuit and overload |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020403955.2U CN212083534U (en) | 2020-03-25 | 2020-03-25 | Indicating circuit for power output short circuit and overload |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212083534U true CN212083534U (en) | 2020-12-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020403955.2U Active CN212083534U (en) | 2020-03-25 | 2020-03-25 | Indicating circuit for power output short circuit and overload |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212083534U (en) |
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2020
- 2020-03-25 CN CN202020403955.2U patent/CN212083534U/en active Active
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