CN213602413U - Power supply circuit, power supply device and switch - Google Patents
Power supply circuit, power supply device and switch Download PDFInfo
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- CN213602413U CN213602413U CN202022293280.3U CN202022293280U CN213602413U CN 213602413 U CN213602413 U CN 213602413U CN 202022293280 U CN202022293280 U CN 202022293280U CN 213602413 U CN213602413 U CN 213602413U
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Abstract
The utility model provides a power supply circuit, power supply unit and switch, power supply circuit includes a plurality of input module and a plurality of prevent flowing backward the module, and the power is connected respectively to every input module's input, and the input of preventing flowing backward the module is connected respectively to every input module's output, and every prevents flowing backward the output of module all is connected with the power supply end of consumer, wherein: the input module is used for receiving power supply voltage, converting the power supply voltage into power supply voltage and then outputting the power supply voltage to a power supply end of the electric equipment through the backflow prevention module; the backflow prevention module is used for conducting a path from the input module to the electric equipment and stopping the path from the electric equipment to the input module. Through setting up the anti-backflow module, only allow input module voltage output, and the voltage input of separation input module input to can avoid the emergence of backward flow phenomenon.
Description
Technical Field
The utility model relates to a power safety field especially relates to a supply circuit, power supply unit and switch.
Background
The existing switch usually adopts a plurality of power supplies for power supply, however, because the plurality of power supplies are output through the same output port, the condition that the plurality of power supplies flow backwards mutually exists, so that the fault of a power supply system is caused, and the use of the switch is finally influenced.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides a supply circuit, power supply unit and switch, aims at solving the problem that prior art multichannel power flows backward each other.
In order to achieve the above object, the utility model provides a power supply circuit, power supply circuit includes a plurality of input module and a plurality of prevent flowing backward the module, and the power is connected respectively to every input module's input, and the input of preventing flowing backward the module is connected respectively to every input module's output, and every prevents flowing backward the output of module all is connected with the power supply end of consumer, wherein:
the input module is used for receiving power supply voltage, converting the power supply voltage into power supply voltage and then outputting the power supply voltage to a power supply end of the electric equipment through the backflow prevention module;
the backflow prevention module is used for conducting a path from the input module to the electric equipment and stopping the path from the electric equipment to the input module.
Optionally, the backflow prevention module includes a first diode, an anode of the first diode is connected to the output end of the input module, and a cathode of the first diode is connected to the power supply terminal of the electric device.
Optionally, the input module comprises a voltage reduction unit connected between the power supply and the backflow prevention module,
the voltage reduction unit is used for receiving power supply voltage and outputting the power supply voltage to a power supply end of the electric equipment through the backflow prevention module after the power supply voltage is reduced to the power supply voltage.
Optionally, the voltage reduction unit includes a voltage reduction chip, a second diode, an inductor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a third capacitor, a fourth capacitor, a fifth capacitor, and a sixth capacitor;
the input end of the voltage reduction chip is connected with a power supply, the input end of the voltage reduction chip is also connected with the first end of the first resistor, the second end of the first resistor is grounded through the second resistor, the enable end of the voltage reduction chip is connected with the second end of the first resistor, the synchronous end of the voltage reduction chip is grounded through the third resistor, the starting end of the voltage reduction chip is connected with the output end of the voltage reduction chip through the fourth capacitor, the output end of the voltage reduction chip is connected with the first end of the inductor, the second end of the inductor is connected with the backflow prevention module, the second end of the inductor is also respectively connected with the first end of the fourth resistor and the first end of the third capacitor, the second end of the fourth resistor is connected with the second end of the third capacitor, the second end of the fourth resistor is also grounded through the fifth resistor, and the output end of the voltage reduction chip is also connected with the cathode of the second diode, the anode of the second diode is grounded, the state flag end of the voltage reduction chip is grounded sequentially through the sixth resistor and the fifth capacitor, the state flag end of the voltage reduction chip is grounded through the sixth capacitor, and the feedback end of the voltage reduction chip is connected with the second end of the fourth resistor.
Optionally, the circuit further comprises a plurality of first filtering modules, the input end of each input module is connected with the power supply through one first filtering module respectively,
the first filtering module is used for filtering the power supply voltage and then outputting the filtered power supply voltage to the input module.
Optionally, the first filtering module comprises an electrolytic capacitor and a second capacitor,
the positive pole of the electrolytic capacitor is connected with a power supply, the negative pole of the electrolytic capacitor is grounded, the first end of the second capacitor is connected with the power supply, and the second end of the second capacitor is grounded.
Optionally, the circuit further comprises a plurality of second filtering modules, the output end of each input module is connected with the backflow prevention module through one second filtering module respectively,
and the second filtering module is used for filtering the power supply voltage and then outputting the filtered power supply voltage to the electric equipment through the backflow prevention module.
Optionally, the second filtering module comprises a seventh capacitor,
and the first end of the seventh capacitor is connected with the output end of the input module, and the second end of the seventh capacitor is grounded.
Further, in order to achieve the above object, the present invention also provides a power supply device including a housing and a power supply circuit configured as the power supply circuit described above.
In addition, in order to achieve the above object, the present invention also provides a switch, which includes a power source, a power supply circuit and an electric device, wherein the power supply circuit is configured as the above power supply circuit.
The utility model provides a pair of power supply circuit, power supply unit and switch, power supply circuit includes a plurality of input module and a plurality of prevent flowing backward the module, and the power is connected respectively to every input module's input, and the input of preventing flowing backward the module is connected respectively to every input module's output, and every prevents flowing backward the output of module all is connected with consumer's power supply end, wherein: the input module is used for receiving power supply voltage, converting the power supply voltage into power supply voltage and then outputting the power supply voltage to a power supply end of the electric equipment through the backflow prevention module; the backflow prevention module is used for conducting a path from the input module to the electric equipment and stopping the path from the electric equipment to the input module. Through setting up the anti-backflow module, only allow input module voltage output, and the voltage input of separation input module input to can avoid the emergence of backward flow phenomenon.
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 functional block diagram of an embodiment of the power supply circuit of the present invention;
fig. 2 is a circuit structure diagram of the power supply circuit of the present invention applied in the embodiment of fig. 1.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | Input module | R1～R6 | First to |
| 200 | Backflow prevention module | C1 | |
| 300 | First filtering module | C2～C7 | Second to |
| 400 | Second filter module | D1～D2 | First to second diodes |
| U1 | Step-down chip |
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and back) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a power supply circuit is applied to among the power supply unit, please refer to fig. 1, and fig. 1 is the utility model discloses power supply circuit's an embodiment's functional module diagram. In this embodiment, the power supply circuit includes a plurality of input modules 100 and a plurality of anti-backflow modules 200, an input terminal of each input module 100 is connected to the power supply, an output terminal of each input module 100 is connected to an input terminal of one anti-backflow module 200, an output terminal of each anti-backflow module 200 is connected to a power supply terminal of the electrical device, wherein:
the input module 100 is configured to receive a power supply voltage, and output the power supply voltage to a power supply end of an electrical device through the backflow prevention module 200 after converting the power supply voltage into a power supply voltage;
the backflow prevention module 200 is configured to conduct a path from the input module 100 to an electric device, and stop a path from the electric device to the input module 100.
In the present embodiment, the backflow prevention module 200 is arranged to only allow the voltage output of the input module 100 and block the voltage input at the input end of the input module 100, so that the backflow phenomenon can be avoided.
Further, the backflow prevention module 200 includes a first diode D1, an anode of the first diode D1 is connected to the output terminal of the input module 100, and a cathode of the first diode D1 is connected to the power supply terminal of the electric device.
The first diode D1 only allows voltage to pass, but prohibits reverse voltage from passing, thereby functioning as a back-flow prevention.
Further, the input module 100 includes a voltage reduction unit connected between the power supply and the backflow prevention module 200,
the voltage reduction unit is configured to receive a power voltage, and output the power voltage to a power supply end of the electrical device through the backflow prevention module 200 after reducing the power voltage to a power supply voltage.
And the power supply voltage output by the voltage reduction unit is adjusted according to the actual requirement of the electric equipment.
Further, the voltage reduction unit includes a voltage reduction chip U1, a second diode D2, an inductor, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, and a sixth capacitor C6;
the input end of the voltage-reducing chip U1 is connected to a power supply, the input end of the voltage-reducing chip U1 is further connected to the first end of the first resistor R1, the second end of the first resistor R1 is grounded through the second resistor R2, the enable end of the voltage-reducing chip U1 is connected to the second end of the first resistor R1, the synchronization end of the voltage-reducing chip U1 is grounded through the third resistor R3, the enable end of the voltage-reducing chip U1 is connected to the output end of the voltage-reducing chip U1 through the fourth capacitor C4, the output end of the voltage-reducing chip U1 is connected to the first end of the inductor, the second end of the inductor is connected to the backflow prevention module 200, the second end of the inductor is further connected to the first end of the fourth resistor R4 and the first end of the third capacitor C3, the second end of the fourth resistor R4 is connected to the second end of the third capacitor C3, and the second end of the fourth resistor R4 is further grounded through the fifth resistor R5, the output end of the voltage reduction chip U1 is further connected with the cathode of the second diode D2, the anode of the second diode D2 is grounded, the state flag end of the voltage reduction chip U1 is grounded through the sixth resistor R6 and the fifth capacitor C5 in sequence, the state flag end of the voltage reduction chip U1 is grounded through the sixth capacitor C6, and the feedback end of the voltage reduction chip U1 is connected with the second end of the fourth resistor R4.
The second diode D2 is used for output overvoltage protection.
The first resistor R1, the second resistor R2 and the third resistor R3 are used for monitoring power input, and corresponding operations are executed according to the monitored power input through the enabling end of the voltage reduction chip U1.
The fourth resistor R4 and the fifth resistor R5 are used for monitoring power output, and corresponding operations are executed according to the monitored power output through the feedback end of the voltage reduction chip U1.
The third capacitor C3, the fourth capacitor C4, the fifth capacitor C5 and the sixth capacitor C6 are used for chip protection filtering.
Furthermore, the circuit further comprises a plurality of first filtering modules 300, wherein the input end of each input module 100 is connected to a power supply through one first filtering module 300,
the first filtering module 300 is configured to filter a power supply voltage and output the filtered power supply voltage to the input module 100.
Further, the first filtering module 300 comprises an electrolytic capacitor C1 and a second capacitor C2,
the anode of the electrolytic capacitor C1 is connected with a power supply, the cathode of the electrolytic capacitor C1 is grounded, the first end of the second capacitor C2 is connected with the power supply, and the second end of the second capacitor C2 is grounded.
The electrolytic capacitor C1 and the second capacitor C2 are used for filtering the power input.
Further, the circuit further comprises a plurality of second filtering modules 400, the output end of each input module 100 is connected to the backflow prevention module 200 through one second filtering module 400,
the second filtering module 400 is configured to filter the power supply voltage and output the filtered power supply voltage to the electrical equipment through the backflow prevention module 200.
Further, the second filtering module 400 includes a seventh capacitor C7,
the first terminal of the seventh capacitor C7 is connected to the output terminal of the input module 100, and the second terminal of the seventh capacitor C7 is grounded.
The seventh capacitor C7 is used for filtering the power supply output.
The following description is made in principle with reference to fig. 2:
after the power normally starts, output mains voltage to each step-down chip U1 respectively, each step-down chip U1 exports power supply to consumer after with mains voltage step-down address, and when a certain power failure of the way, during the voltage reduction, the voltage of other way power output can't be imported to this way power because first diode D1's effect, has prevented that the power from flowing backward.
The utility model discloses still protect a power supply unit, this power supply unit include casing and supply circuit, and above-mentioned embodiment can be referred to this supply circuit's structure, no longer gives unnecessary details here. It should be understood that, since the power supply device of the present embodiment adopts the technical solution of the power supply circuit, the power supply device has all the beneficial effects of the power supply circuit.
The utility model discloses still protect a switch, the switch includes power, supply circuit and consumer, and above-mentioned embodiment can be referred to this supply circuit's structure, no longer gives unnecessary details here. It should be understood that, since the switch of this embodiment adopts the technical solution of the above power supply circuit, the switch has all the beneficial effects of the above power supply circuit.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. The term "comprising", without further limitation, means that the element so defined is not excluded from the group of processes, methods, articles, or systems that include the element. The above embodiment numbers of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.
The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. The utility model provides a power supply circuit, its characterized in that, the circuit includes a plurality of input module and a plurality of prevent flowing backward module, and the power is connected respectively to every input module's input, and the input of a prevent flowing backward module is connected respectively to every input module's output, and every prevents flowing backward the output of module all is connected with consumer's feed end, wherein:
the input module is used for receiving power supply voltage, converting the power supply voltage into power supply voltage and then outputting the power supply voltage to a power supply end of the electric equipment through the backflow prevention module;
the backflow prevention module is used for conducting a path from the input module to the electric equipment and stopping the path from the electric equipment to the input module.
2. The power supply circuit of claim 1, wherein the backflow prevention module comprises a first diode, an anode of the first diode is connected to the output terminal of the input module, and a cathode of the first diode is connected to the power supply terminal of the powered device.
3. The power supply circuit of claim 1 wherein said input module includes a voltage dropping unit connected between said power supply and said back-flow prevention module,
the voltage reduction unit is used for receiving power supply voltage and outputting the power supply voltage to a power supply end of the electric equipment through the backflow prevention module after the power supply voltage is reduced to the power supply voltage.
4. The power supply circuit according to claim 3, wherein the voltage dropping unit includes a voltage dropping chip, a second diode, an inductor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a third capacitor, a fourth capacitor, a fifth capacitor, and a sixth capacitor;
the input end of the voltage reduction chip is connected with a power supply, the input end of the voltage reduction chip is also connected with the first end of the first resistor, the second end of the first resistor is grounded through the second resistor, the enable end of the voltage reduction chip is connected with the second end of the first resistor, the synchronous end of the voltage reduction chip is grounded through the third resistor, the starting end of the voltage reduction chip is connected with the output end of the voltage reduction chip through the fourth capacitor, the output end of the voltage reduction chip is connected with the first end of the inductor, the second end of the inductor is connected with the backflow prevention module, the second end of the inductor is also respectively connected with the first end of the fourth resistor and the first end of the third capacitor, the second end of the fourth resistor is connected with the second end of the third capacitor, the second end of the fourth resistor is also grounded through the fifth resistor, and the output end of the voltage reduction chip is also connected with the cathode of the second diode, the anode of the second diode is grounded, the state flag end of the voltage reduction chip is grounded sequentially through the sixth resistor and the fifth capacitor, the state flag end of the voltage reduction chip is grounded through the sixth capacitor, and the feedback end of the voltage reduction chip is connected with the second end of the fourth resistor.
5. The power supply circuit according to any one of claims 1 to 4, wherein the circuit further comprises a plurality of first filtering modules, the input end of each input module is connected with a power supply through one first filtering module,
the first filtering module is used for filtering the power supply voltage and then outputting the filtered power supply voltage to the input module.
6. The power supply circuit of claim 5 wherein said first filtering module comprises an electrolytic capacitor and a second capacitor,
the positive pole of the electrolytic capacitor is connected with a power supply, the negative pole of the electrolytic capacitor is grounded, the first end of the second capacitor is connected with the power supply, and the second end of the second capacitor is grounded.
7. The power supply circuit of claim 5 wherein said circuit further comprises a plurality of second filtering modules, wherein the output terminal of each of said input modules is connected to a back-flow prevention module through a respective one of said second filtering modules,
and the second filtering module is used for filtering the power supply voltage and then outputting the filtered power supply voltage to the electric equipment through the backflow prevention module.
8. The power supply circuit of claim 7 wherein said second filtering module includes a seventh capacitor,
and the first end of the seventh capacitor is connected with the output end of the input module, and the second end of the seventh capacitor is grounded.
9. A power supply device characterized by comprising a housing and a power supply circuit configured as the power supply circuit according to any one of claims 1 to 8, the power supply circuit being provided in the housing.
10. A switch, characterized in that the switch comprises a power supply, a power supply circuit and a consumer, the power supply circuit being configured as the power supply circuit of any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022293280.3U CN213602413U (en) | 2020-10-14 | 2020-10-14 | Power supply circuit, power supply device and switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022293280.3U CN213602413U (en) | 2020-10-14 | 2020-10-14 | Power supply circuit, power supply device and switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213602413U true CN213602413U (en) | 2021-07-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022293280.3U Active CN213602413U (en) | 2020-10-14 | 2020-10-14 | Power supply circuit, power supply device and switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213602413U (en) |
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2020
- 2020-10-14 CN CN202022293280.3U patent/CN213602413U/en active Active
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