CN218386925U - Power supply switching restarting circuit - Google Patents
Power supply switching restarting circuit Download PDFInfo
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- CN218386925U CN218386925U CN202221594297.5U CN202221594297U CN218386925U CN 218386925 U CN218386925 U CN 218386925U CN 202221594297 U CN202221594297 U CN 202221594297U CN 218386925 U CN218386925 U CN 218386925U
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- power supply
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- switch unit
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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 relates to a restart circuit technical field discloses a power supply switching restart circuit, including the charge-discharge unit circuit, the input of charge-discharge unit circuit is connected with external power supply, the output of charge-discharge unit circuit is connected with the switch unit circuit, and the internal power supply is connected with external load through the switch unit circuit; the utility model discloses simple structure can be gone up the electricity under the user does not have the perception condition and restart, need not to tear open the machine, and restart the time adjustable, effectively improve the practicality.
Description
Technical Field
The utility model relates to a restart circuit technical field specifically is a power supply switching restarts circuit.
Background
When a product with a built-in non-detachable battery needs to be restarted in time in certain operations, an external power supply needs to be manually cut off, and the external power supply is accessed when the internal battery is exhausted, so that the product is restarted or is dismounted and restarted. After the external power supply can not be cut off, the product is immediately electrified and restarted under the condition that a user does not sense the external power supply.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a circuit is restarted in power supply switching aims at providing simple structure, can go up the electricity under the user does not have the perception condition and restart, need not to tear open the machine, and restart time adjustable, effectively improves a circuit is restarted in power supply switching of practicality.
The utility model discloses a realize like this:
the utility model provides a power supply switching restart circuit, includes the charge and discharge unit circuit, the input and the external power supply of charge and discharge unit circuit are connected, the output of charge and discharge unit circuit is connected with switch unit circuit, and internal power passes through switch unit circuit is connected with external load.
Further, the charge and discharge unit circuit includes a resistor R39 with one end connected with an external power supply, the other end of the resistor R39 is connected with the switch unit circuit, the resistor R39 is connected with one end of the switch unit circuit, the other end of the capacitor C2 is connected with the ground, and the resistor R38 is connected with the capacitor C2 in parallel.
Further, the switch unit circuit include with the diode D3 that charge and discharge unit circuit connects, diode D3's negative pole with charge and discharge unit connects, diode D3's positive pole is connected with resistance R35 and field effect transistor Q2 respectively, field effect transistor Q2's grid with diode D3 and resistance R35's one end are connected, field effect transistor Q2's source electrode respectively with internal power source with the other end of resistance R35 is connected, field effect transistor Q2's drain electrode is connected with external load.
Further, the switch unit circuit and the external power supply are connected with an external load through a diode D7 and a diode D1 respectively, the anode of the diode D7 is connected with the switch unit circuit, the cathode of the diode D7 is connected with the external load, the anode of the diode D1 is connected with the external power supply, and the cathode of the diode D1 is connected with the external load.
Compared with the prior art, the beneficial effects of the utility model are that:
in practical application, in a system, an external power supply has a voltage of 12V, an internal power supply is an undetachable battery, an input end of the charge and discharge unit circuit is connected with the external power supply, the external power supply is connected with an external load, when the external power supply supplies power, the external power supply directly supplies power to the external load, meanwhile, the external power supply charges the charge and discharge unit circuit, the switch unit circuit controls to disconnect the power supply of the internal power supply, and at the moment, the internal power supply does not output; when the external power supply is in power failure, the charging and discharging unit circuit has no output, the switch unit circuit keeps the original state, and the internal power supply has no output; when the external power supply is powered off, the charging and discharging unit circuit discharges, and when the switch unit circuit detects that the voltage of the charging and discharging unit circuit is reduced to a threshold value, the switch unit circuit controls the internal power supply to supply power to the external load; just the charge-discharge unit circuit discharges and reduces to the required time of threshold value, accessible to voltage charge-discharge unit circuit adjusts, the utility model discloses simple structure can be gone up the electricity under the user does not have the perception condition and restart, need not to tear the machine open, and restart the time adjustable, effectively improves the practicality.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic block circuit diagram of the present invention;
fig. 2 is a schematic circuit diagram of the present invention.
Detailed Description
To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are part of the 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 work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 and 2, a power switching restart circuit includes a charge/discharge unit circuit, an input terminal of the charge/discharge unit circuit is connected to an external power source, an output terminal of the charge/discharge unit circuit is connected to a switch unit circuit, and an internal power source is connected to an external load through the switch unit circuit.
In practical application, in a system, an external power supply voltage is 12V, an internal power supply is an undetachable battery, the input end of the charge and discharge unit circuit is connected with the external power supply, the external power supply is connected with an external load, when the external power supply supplies power, the external power supply directly supplies power to the external load, meanwhile, the external power supply charges the charge and discharge unit circuit, the switch unit circuit controls to disconnect the power supply of the internal power supply, and at the moment, the internal power supply does not output power; when the external power supply is powered off, the charging and discharging unit circuit has no output, the switch unit circuit keeps the original state, and the internal power supply has no output; when the external power supply is powered off, the charging and discharging unit circuit discharges, and when the switch unit circuit detects that the voltage of the charging and discharging unit circuit is reduced to a threshold value, the switch unit circuit controls the internal power supply to supply power to the external load; just the charge and discharge unit circuit discharges and reduces the required time of threshold value, accessible to voltage charge and discharge unit circuit adjusts, the utility model discloses simple structure can be on the electricity under the user does not have the perception condition and restart, need not to tear the machine open, and restart the time adjustable, effectively improve the practicality.
Referring to fig. 1 and 2, the charge and discharge unit circuit includes a resistor R39 having one end connected to an external power source, the other end of the resistor R39 is connected to the switch unit circuit, one end of the resistor R39 connected to the switch unit circuit is connected to a capacitor C2 and a resistor R38, the other end of the capacitor C2 is connected to ground, and the resistor R38 is connected to the capacitor C2 in parallel. In this embodiment, when the external power supply normally supplies power, the external power supply charges the capacitor C2 through the resistor R39; when the external power supply is in power failure, the capacitor C2 is in a full-charge state, and the external load is in power failure; the capacitor C2 is discharged through the resistance resistor R38, and when the voltage discharged by the capacitor C2 is low to a threshold value, the switch unit circuit controls the internal power supply to supply power; the time length required by product restart is related to the values of the capacitor C2 and the resistor R38, and the values of the capacitor C2 and the resistor R38 can be adjusted according to different time requirements.
Referring to fig. 1 and 2, the switch unit circuit includes a diode D3 connected to the charge and discharge unit circuit, a cathode of the diode D3 is connected to the charge and discharge unit, an anode of the diode D3 is connected to a resistor R35 and a field effect transistor Q2, a gate of the field effect transistor Q2 is connected to one ends of the diode D3 and the resistor R35, a source of the field effect transistor Q2 is connected to an internal power supply and the other end of the resistor R35, and a drain of the field effect transistor Q2 is connected to an external load. In this embodiment, the field effect transistor Q2 is preferably a03401, and when the external power supply supplies power normally, the field effect transistor Q2 is turned off, and the internal power supply does not output power; when the external power supply is powered off, the output voltage of the charging and discharging unit circuit is the voltage of the external power supply, and the field effect tube Q2 is in a cut-off state; as the discharge output voltage of the charge and discharge unit circuit is reduced to the threshold voltage, the diode D3 is conducted, the field effect transistor Q2 is conducted, the external load is powered by an external power supply, and the external load is switched to be powered by an internal power supply; the resistor R35 plays a role in current limiting protection.
Referring to fig. 1 and 2, the switch unit circuit and the external power source are respectively connected to an external load through a diode D7 and a diode D1, an anode of the diode D7 is connected to the switch unit circuit, a cathode of the diode D7 is connected to the external load, an anode of the diode D1 is connected to the external power source, and a cathode of the diode D1 is connected to the external load. In this embodiment, the diode D7 and the diode D1 are both preferably SS34 schottky diodes, the diode D7 and the diode D1 play a role of output freewheeling to maintain the continuity of the output current, and the diode D7 and the diode D1 play a role of reverse isolation to prevent the external load voltage from reversely affecting the switch unit circuit or the external power supply.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A power-switching restart circuit, characterized in that: the charging and discharging circuit comprises a charging and discharging unit circuit, wherein the input end of the charging and discharging unit circuit is connected with an external power supply, the output end of the charging and discharging unit circuit is connected with a switch unit circuit, and the internal power supply is connected with an external load through the switch unit circuit.
2. The power switching restart circuit of claim 1, wherein the charge/discharge unit circuit comprises a resistor R39 having one end connected to an external power source, the other end of the resistor R39 is electrically connected to the switch unit, one end of the resistor R39 electrically connected to the switch unit is connected to a capacitor C2 and a resistor R38, respectively, the other end of the capacitor C2 is connected to ground, and the resistor R38 is connected to the capacitor C2 in parallel.
3. The power switching restart circuit of claim 1, wherein the switch unit circuit comprises a diode D3 connected to the charge/discharge unit circuit, a cathode of the diode D3 is connected to the charge/discharge unit circuit, an anode of the diode D3 is connected to a resistor R35 and a fet Q2, respectively, a gate of the fet Q2 is connected to one end of the diode D3 and one end of the resistor R35, a source of the fet Q2 is connected to the other end of the resistor R35 and an internal power supply, respectively, and a drain of the fet Q2 is connected to an external load.
4. The power switching restart circuit of claim 1, wherein the switch unit circuit and the external power source are connected to the external load through a diode D7 and a diode D1, respectively, an anode of the diode D7 is connected to the switch unit circuit, a cathode of the diode D7 is connected to the external load, an anode of the diode D1 is connected to the external power source, and a cathode of the diode D1 is connected to the external load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221594297.5U CN218386925U (en) | 2022-06-21 | 2022-06-21 | Power supply switching restarting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221594297.5U CN218386925U (en) | 2022-06-21 | 2022-06-21 | Power supply switching restarting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218386925U true CN218386925U (en) | 2023-01-24 |
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ID=84959680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221594297.5U Active CN218386925U (en) | 2022-06-21 | 2022-06-21 | Power supply switching restarting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218386925U (en) |
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2022
- 2022-06-21 CN CN202221594297.5U patent/CN218386925U/en active Active
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