CN215498402U - Power supply circuit and power supply network - Google Patents
Power supply circuit and power supply network Download PDFInfo
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- CN215498402U CN215498402U CN202121603965.1U CN202121603965U CN215498402U CN 215498402 U CN215498402 U CN 215498402U CN 202121603965 U CN202121603965 U CN 202121603965U CN 215498402 U CN215498402 U CN 215498402U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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Abstract
The utility model discloses a power supply circuit, which comprises a main power supply, a slave power supply and an on-off switcher; the slave power supply is a standby power supply of the main power supply; the on-off switcher comprises a monitoring end, a flow guide input end and a flow guide output end; the secondary power supply is connected with the electrical appliance through the current-guiding input end and the current-guiding output end; the monitoring end is connected with the output end of the main power supply and used for obtaining the output voltage of the main power supply, and when the output voltage of the main power supply does not exceed a switching threshold value, the flow guide input end and the flow guide output end are conducted, so that the slave power supply supplies power to the electrical appliance. The utility model realizes the competitive power supply of the master power supply and the slave power supply through hardware, thereby avoiding the size relation limitation between the output voltage of the master power supply and the output voltage of the slave power supply, enabling the circuit design to be more flexible, avoiding the leakage current and eliminating the potential safety hazard. The utility model also provides a power supply network with the beneficial effects.
Description
Technical Field
The utility model relates to the field of power supply, in particular to a power supply circuit and a power supply network.
Background
With the progress of the technology, more and more electronic products require that under the condition of power failure, the products also meet the power supply of the system, some basic functions are kept to operate, and the standby power supply is required to follow up in time when the main power supply is stopped unexpectedly, so that the power failure of the system is avoided.
Most current system solutions are to compete for system power sharing via a master power source with a slave power source, as shown in fig. 1, however, this solution also has certain limitations, requiring V2< V1; secondly, there is the potential safety hazard, namely there is the leakage current that flows to from the power in the main power supply under high temperature environment, can lead to V1 to deposit the battery, will influence battery life-span greatly, and under the adverse circumstances, the battery is probably exploded.
Therefore, how to eliminate the potential safety hazard while avoiding system power down is an urgent problem to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a power supply circuit and a power supply network, which aim to solve the problem of potential safety hazard caused by leakage current in the prior art.
In order to solve the above technical problems, the present invention provides a power supply circuit, which includes a main power supply, a slave power supply, and an on-off switch;
the slave power supply is a standby power supply of the main power supply;
the on-off switcher comprises a monitoring end, a flow guide input end and a flow guide output end;
the secondary power supply is connected with the electrical appliance through the current-guiding input end and the current-guiding output end;
the monitoring end is connected with the output end of the main power supply and used for obtaining the output voltage of the main power supply, and when the output voltage of the main power supply does not exceed a switching threshold value, the flow guide input end and the flow guide output end are conducted, so that the slave power supply supplies power to the electrical appliance.
Optionally, in the power supply circuit, the main power supply includes an ac mains supply, an ac-dc converter, and a dc step-down converter;
the alternating current commercial power supply supplies power to the electrical appliance through the alternating current-direct current converter and the direct current voltage reducer in sequence;
the monitoring end is connected to the output end of the alternating current-direct current converter and used for obtaining the output voltage of the alternating current-direct current converter, and when the output voltage of the alternating current-direct current converter does not exceed a switching threshold value, the flow guide input end and the flow guide output end are conducted.
Optionally, in the power supply circuit, the on-off switch controls the conduction and disconnection between the current-guiding input terminal and the current-guiding output terminal through a MOS tube.
Optionally, in the power supply circuit, the on-off switch includes a first voltage-dividing resistor, a second voltage-dividing resistor, and a PMOS transistor;
a first end of the first voltage-dividing resistor is connected to an output end of the ac-dc converter, and a second end of the first voltage-dividing resistor is connected to a first end of the second voltage-dividing resistor and a gate of the PMOS transistor, respectively;
the second end of the second voltage-dividing resistor is grounded;
and the source electrode of the PMOS tube is connected to the anode of the slave power supply, and the drain electrode of the PMOS tube is connected to the input end of the electrical appliance.
Optionally, in the power supply circuit, the power supply circuit further includes a unidirectional flow director;
the one-way fluid director is arranged between the main power supply and the electrical appliance and/or between the fluid-guiding output end and the electrical appliance and is used for preventing current from flowing reversely.
Optionally, in the power supply circuit, the unidirectional flow director is a diode.
Optionally, in the power supply circuit, the diode is a schottky diode.
Optionally, in the power supply circuit, the slave power source is a storage battery.
A power supply network comprising a power supply circuit as claimed in any one of the preceding claims.
The power supply circuit provided by the utility model comprises a main power supply, a secondary power supply and an on-off switcher; the slave power supply is a standby power supply of the main power supply; the on-off switcher comprises a monitoring end, a flow guide input end and a flow guide output end; the secondary power supply is connected with the electrical appliance through the current-guiding input end and the current-guiding output end; the monitoring end is connected with the output end of the main power supply and used for obtaining the output voltage of the main power supply, and when the output voltage of the main power supply does not exceed a switching threshold value, the flow guide input end and the flow guide output end are conducted, so that the slave power supply supplies power to the electrical appliance.
The power supply circuit provided by the utility model is additionally provided with the on-off switcher, and the on-off switcher cuts off the connection between the slave power supply and the electrical appliance under the condition that the main power supply is normally supplied with power; when the main power supply is abnormal and the output voltage is lower than the switching threshold value, the on-off switcher acts to conduct between the power supply and the electrical appliance to supply power to the electrical appliance, and the competitive power supply of the main power supply and the secondary power supply is realized through hardware, so that the limitation on the magnitude relation between the output voltage of the main power supply and the output voltage of the secondary power supply is avoided, the circuit design is more flexible, the main power supply and the secondary power supply are physically isolated through the on-off switcher, the leakage current of the main power supply to the secondary power supply in a high-voltage state is avoided, and the potential safety hazard is eliminated. The utility model also provides a power supply network with the beneficial effects.
Drawings
In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a connection circuit of a master power supply and a slave power supply for competing power supply in the prior art;
FIG. 2 is a schematic structural diagram of a power supply circuit according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a power supply circuit according to another embodiment of the present invention;
fig. 4 is a schematic structural diagram of another embodiment of the power supply circuit provided in the present invention.
Detailed Description
In order that those skilled in the art will better understand the disclosure, the utility model will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The core of the present invention is to provide a power supply circuit, a schematic structural diagram of one embodiment of which is shown in fig. 2, which is called as a first embodiment, and includes a main power source 10, a slave power source 20, and an on-off switch 30;
the slave power supply 20 is a backup power supply of the master power supply 10;
the on-off switch 30 comprises a monitoring end, a flow guide input end and a flow guide output end;
the slave power supply 20 is connected to the electrical appliance through the current-guiding input end and the current-guiding output end;
the monitoring end is connected to the output end of the main power supply 10 and is used for obtaining the output voltage of the main power supply 10, and when the output voltage of the main power supply 10 does not exceed a switching threshold value, the flow guide input end and the flow guide output end are conducted, so that the slave power supply 20 supplies power to the electrical appliance.
As a specific implementation manner, the on-off switch 30 controls the connection and disconnection between the current guiding input terminal and the current guiding output terminal through an MOS transistor, when the MOS transistor is adopted, the source and the drain of the MOS transistor are respectively connected to the current guiding input terminal and the current guiding output terminal, the monitoring terminal receives the output voltage of the main power supply 10, the processed signal is sent to the gate of the MOS transistor, and the gate controls the connection and disconnection of the MOS transistor according to the signal. Of course, the on-off switch 30 can also realize the on-off control between the slave power source 20 and the electrical appliance through other devices.
In addition, the monitoring terminal is connected to the output terminal of the main power source 10, when the output voltage of the main power source 10 does not exceed the switching threshold, the monitoring terminal triggers (i.e. the line marked "trigger" in fig. 2 and 3) the current guiding input terminal and the current guiding output terminal of the on-off switch 30, of course, the terminal close to the slave power source 20 is the current guiding input terminal, and the terminal far from the slave power source 20 is the current guiding output terminal.
In the corresponding drawings of the present invention, the output voltage of the main power supply 10 is denoted by V1, and the output voltage of the sub power supply 20 is denoted by V2.
As a preferred embodiment, the power supply circuit further comprises unidirectional fluid directors D1, D2; the one-way deflectors D1, D2 are disposed between the main power supply 10 and the electrical appliance and/or between the deflector output and the electrical appliance for preventing the reverse flow of current. Referring to fig. 2, the unidirectional current directors D1 and D2 are installed between the main power supply 10 and the quality control of the electrical appliance and between the secondary power supply 20 and the electrical appliance in fig. 2, and are used for preventing current backflow or leakage current from damaging the power supply structure. Preferably, the unidirectional fluid directors D1 and D2 are diodes, the diodes have a simple structure, occupy a small space, are flexibly configured, and have a low cost, and of course, the unidirectional fluid directors can also be other electronic elements having a unidirectional fluid-guiding function; furthermore, the diode is a Schottky diode, and the forward voltage drop of the Schottky diode is much lower than that of the fast recovery diode, so that the self power consumption is low, and the efficiency is high.
In addition, the secondary power supply 20 is a storage battery, the storage battery has high energy storage efficiency, is convenient to transport, does not need complex wiring, and can form the primary and secondary power supply 20 with an old power supply system only powered by a single power supply after simple modification.
The power supply circuit provided by the utility model comprises a main power supply 10, a slave power supply 20 and an on-off switcher 30; the slave power supply 20 is a backup power supply of the master power supply 10; the on-off switch 30 comprises a monitoring end, a flow guide input end and a flow guide output end; the slave power supply 20 is connected to the electrical appliance through the current-guiding input end and the current-guiding output end; the monitoring end is connected to the output end of the main power supply 10 and is used for obtaining the output voltage of the main power supply 10, and when the output voltage of the main power supply 10 does not exceed a switching threshold value, the flow guide input end and the flow guide output end are conducted, so that the slave power supply 20 supplies power to the electrical appliance. The power supply circuit provided by the utility model is additionally provided with the on-off switch 30, and under the condition that the main power supply 10 supplies power normally, the on-off switch 30 cuts off the connection between the slave power supply 20 and the electrical appliance; when the main power supply 10 is abnormal and the output voltage is lower than the switching threshold value, the on-off switch 30 acts to conduct between the power supply 20 and the electrical appliance to supply power to the electrical appliance, and the competitive power supply of the main power supply 20 and the secondary power supply 20 is realized through hardware, so that the limitation of the magnitude relation between the output voltage of the main power supply 10 and the output voltage of the secondary power supply 20 is avoided, the circuit design is more flexible, meanwhile, the main power supply 10 and the secondary power supply 20 are physically isolated through the on-off switch 30, the leakage current of the main power supply 10 to the secondary power supply 20 in a high-voltage state is avoided, and the potential safety hazard is eliminated.
On the basis of the first embodiment, the main power source 10 and the on-off switch 30 corresponding to the main power source 10 are further limited to obtain a second embodiment, a schematic structural diagram of which is shown in fig. 3 and includes the main power source 10, the slave power source 20 and the on-off switch 30;
the slave power supply 20 is a backup power supply of the master power supply 10;
the on-off switch 30 comprises a monitoring end, a flow guide input end and a flow guide output end;
the slave power supply 20 is connected to the electrical appliance through the current-guiding input end and the current-guiding output end;
the monitoring end is connected to the output end of the main power supply 10 and is used for obtaining the output voltage of the main power supply 10, and when the output voltage of the main power supply 10 does not exceed a switching threshold value, the current-guiding input end and the current-guiding output end are conducted, so that the slave power supply 20 supplies power to the electrical appliance;
the main power supply 10 comprises an alternating current mains supply AC, an alternating current-direct current converter 11 and a direct current voltage reducer 12;
the alternating current commercial power supply AC supplies power to the electrical appliance through the alternating current-direct current converter 11 and the direct current voltage reducer 12 in sequence;
the monitoring end is connected to the output end of the ac-dc converter 11 and is configured to obtain an output voltage of the ac-dc converter 11, and when the output voltage of the ac-dc converter 11 does not exceed a switching threshold, the current guiding input end and the current guiding output end are connected.
In the present embodiment, the main power source 10 is limited, that is, when the commercial power is used, the application range is quite wide, and it is a common situation, in this case, in this embodiment, the connection position of the monitoring end of the on-off switch 30 is adjusted, so that the monitoring end is connected to the output end of the ac-dc converter 11, since there is an unavoidable delay between the output voltage of the main power source 10 not exceeding the switching threshold and the on-off switch 30 being closed, that is, a neutral period, which may cause a fault of the electrical appliance, between the power source 20 and the electrical appliance, when the output voltage of the ac-dc converter 11 is insufficient, the secondary power source 20 is connected to the circuit, and before the secondary power source 20 starts to supply power, since a part of the electrical energy is still stored in the dc voltage reducer 12, therefore, the neutral period can not occur, the stable switching between the power supplies is ensured, the possibility of the faults of the electric appliances is reduced, and the system stability is improved.
In the drawings of the present invention, the output voltage of the ac/dc converter 11 is denoted by V3.
On the basis of the second embodiment, the structure of the on-off switch 30 is further limited to obtain a third embodiment, and a schematic structural diagram of the third embodiment is shown in fig. 4, and includes a main power source 10, a slave power source 20 and the on-off switch 30;
the slave power supply 20 is a backup power supply of the master power supply 10;
the on-off switch 30 comprises a monitoring end, a flow guide input end and a flow guide output end;
the slave power supply 20 is connected to the electrical appliance through the current-guiding input end and the current-guiding output end;
the monitoring end is connected to the output end of the main power supply 10 and is used for obtaining the output voltage of the main power supply 10, and when the output voltage of the main power supply 10 does not exceed a switching threshold value, the current-guiding input end and the current-guiding output end are conducted, so that the slave power supply 20 supplies power to the electrical appliance;
the main power supply 10 comprises an alternating current mains supply AC, an alternating current-direct current converter 11 and a direct current voltage reducer 12;
the alternating current commercial power supply AC supplies power to the electrical appliance through the alternating current-direct current converter 11 and the direct current voltage reducer 12 in sequence;
the monitoring end is connected to the output end of the alternating current-direct current converter 11 and is used for acquiring the output voltage of the alternating current-direct current converter 11, and when the output voltage of the alternating current-direct current converter 11 does not exceed a switching threshold value, the flow guide input end and the flow guide output end are conducted;
the on-off switch 30 comprises a first voltage dividing resistor R1, a second voltage dividing resistor R2 and a PMOS transistor T1;
a first end of the first voltage-dividing resistor R1 is connected to the output end of the ac-dc converter 11, and a second end of the first voltage-dividing resistor R1 is connected to a first end of the second voltage-dividing resistor R2 and the gate of the PMOS transistor T1, respectively;
a second end of the second voltage-dividing resistor R2 is grounded;
the source of the PMOS transistor T1 is connected to the positive pole of the slave power supply 20, and the drain of the PMOS transistor T1 is connected to the input end of the electrical appliance.
The present embodiment provides a specific structure of the on/off switch 30, please refer to fig. 4, wherein the "grounding" refers to the neutral point of the power system and the electrical device, and is not physically the ground.
The output voltage of the ac-dc converter 11 sequentially passes through the first voltage dividing resistor R1 and the second voltage dividing resistor R2 and is grounded, so the voltage received by the gate of the PMOS transistor T1 should be the same as the divided voltage of the second voltage dividing resistor R2, that is, the gate-on voltage of the PMOS transistor T1 is the divided voltage of the second voltage dividing resistor R2 when the output voltage of the dc-ac converter reaches the switching threshold voltage through the selection of device parameters. Of course, NMOS transistors or other switching transistors may be used, and the corresponding variations may be made.
The utility model also provides a power supply network comprising a power supply circuit as claimed in any one of the above. The power supply circuit provided by the utility model comprises a main power supply 10, a slave power supply 20 and an on-off switcher 30; the slave power supply 20 is a backup power supply of the master power supply 10; the on-off switch 30 comprises a monitoring end, a flow guide input end and a flow guide output end; the slave power supply 20 is connected to the electrical appliance through the current-guiding input end and the current-guiding output end; the monitoring end is connected to the output end of the main power supply 10 and is used for obtaining the output voltage of the main power supply 10, and when the output voltage of the main power supply 10 does not exceed a switching threshold value, the flow guide input end and the flow guide output end are conducted, so that the slave power supply 20 supplies power to the electrical appliance. The power supply circuit provided by the utility model is additionally provided with the on-off switch 30, and under the condition that the main power supply 10 supplies power normally, the on-off switch 30 cuts off the connection between the slave power supply 20 and the electrical appliance; when the main power supply 10 is abnormal and the output voltage is lower than the switching threshold value, the on-off switch 30 acts to conduct between the power supply 20 and the electrical appliance to supply power to the electrical appliance, and the competitive power supply of the main power supply 20 and the secondary power supply 20 is realized through hardware, so that the limitation of the magnitude relation between the output voltage of the main power supply 10 and the output voltage of the secondary power supply 20 is avoided, the circuit design is more flexible, meanwhile, the main power supply 10 and the secondary power supply 20 are physically isolated through the on-off switch 30, the leakage current of the main power supply 10 to the secondary power supply 20 in a high-voltage state is avoided, and the potential safety hazard is eliminated.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
It is to be noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus 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 apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The power supply circuit and the power supply network provided by the utility model are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (9)
1. A power supply circuit is characterized by comprising a main power supply, a slave power supply and an on-off switcher;
the slave power supply is a standby power supply of the main power supply;
the on-off switcher comprises a monitoring end, a flow guide input end and a flow guide output end;
the secondary power supply is connected with the electrical appliance through the current-guiding input end and the current-guiding output end;
the monitoring end is connected with the output end of the main power supply and used for obtaining the output voltage of the main power supply, and when the output voltage of the main power supply does not exceed a switching threshold value, the flow guide input end and the flow guide output end are conducted, so that the slave power supply supplies power to the electrical appliance.
2. The power supply circuit of claim 1, wherein the main power supply comprises an ac mains power supply, an ac-to-dc converter, and a dc-to-dc voltage reducer;
the alternating current commercial power supply supplies power to the electrical appliance through the alternating current-direct current converter and the direct current voltage reducer in sequence;
the monitoring end is connected to the output end of the alternating current-direct current converter and used for obtaining the output voltage of the alternating current-direct current converter, and when the output voltage of the alternating current-direct current converter does not exceed a switching threshold value, the flow guide input end and the flow guide output end are conducted.
3. The power supply circuit of claim 1, wherein the on-off switch controls the conduction and disconnection between the current-guiding input terminal and the current-guiding output terminal through a MOS tube.
4. The power supply circuit of claim 3 wherein said on/off switch comprises a first voltage divider resistor, a second voltage divider resistor and a PMOS transistor;
a first end of the first voltage-dividing resistor is connected to an output end of the ac-dc converter, and a second end of the first voltage-dividing resistor is connected to a first end of the second voltage-dividing resistor and a gate of the PMOS transistor, respectively;
the second end of the second voltage-dividing resistor is grounded;
and the source electrode of the PMOS tube is connected to the anode of the slave power supply, and the drain electrode of the PMOS tube is connected to the input end of the electrical appliance.
5. The power supply circuit of claim 1 wherein said power supply circuit further comprises a unidirectional flow director;
the one-way fluid director is arranged between the main power supply and the electrical appliance and/or between the fluid-guiding output end and the electrical appliance and is used for preventing current from flowing reversely.
6. The power supply circuit of claim 5 wherein said unidirectional flow director is a diode.
7. The power supply circuit of claim 6 wherein said diode is a schottky diode.
8. The power supply circuit of claim 1 wherein said slave power source is a battery.
9. An electrical power supply network, characterized in that it comprises a supply circuit according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121603965.1U CN215498402U (en) | 2021-07-14 | 2021-07-14 | Power supply circuit and power supply network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121603965.1U CN215498402U (en) | 2021-07-14 | 2021-07-14 | Power supply circuit and power supply network |
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| Publication Number | Publication Date |
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| CN215498402U true CN215498402U (en) | 2022-01-11 |
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