CN220156279U - Dual-power supply circuit and device - Google Patents
Dual-power supply circuit and device Download PDFInfo
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- CN220156279U CN220156279U CN202321040153.XU CN202321040153U CN220156279U CN 220156279 U CN220156279 U CN 220156279U CN 202321040153 U CN202321040153 U CN 202321040153U CN 220156279 U CN220156279 U CN 220156279U
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Abstract
The utility model relates to a dual-power supply circuit and a device, wherein the dual-power supply circuit comprises: the device comprises a first power supply, a second power supply, a current-limiting control device and a unidirectional control device; the output voltage of the first power supply is larger than the output voltage of the second power supply; the output end of the first power supply is connected with the input end of the current-limiting control device, and the output end of the current-limiting control device is connected with the power supply output end of the dual-power supply circuit; the power supply output end is used for connecting load equipment; the output end of the second power supply is connected with the unidirectional input end of the unidirectional control device, and the unidirectional output end of the unidirectional control device is connected with the power supply output end. According to the dual-power supply circuit, the current limiting control device is arranged on the first power supply, the unidirectional control device is arranged on the second power supply, and the first power supply or the second power supply can be switched automatically according to the magnitude relation between the current required by the load equipment and the limiting current, so that the dual-power supply circuit is safe and reliable.
Description
Technical Field
The present utility model relates to the field of electronic circuits, and in particular, to a dual-power supply circuit and apparatus.
Background
The dual-power supply product in the current market mainly realizes dual-power supply through switching of a switching device or a unidirectional control device.
The dual-power supply switching device comprises a dual-power supply, a controller, a switching device and a switching controller, wherein the dual-power supply switching device is used for controlling a product of dual-power supply operation, the switching device is used for switching on or off a switch of two power supply branches according to the requirements of load equipment, the switching device is used for switching on or off the switch of the two power supply branches, the circuit structure of the dual-power supply switching device is complex, the controller is required to be added, in addition, the dual-power supply switching device is required to reserve break time in switching, and the power failure risk of the load equipment exists. The product of dual power supply work is controlled by the single-phase control device, and high power supply or low power supply is selected to be output to load equipment according to the output voltage of the dual power supply, for example, a diode is used for automatically selecting the power supply with higher voltage to supply power, so that two power supplies can only be selected, the selection standard can not be changed, the single power supply is supplied for a long time, and the nature of dual power supply is lost.
Disclosure of Invention
The utility model provides a dual-power supply circuit and a device for solving the technical problem of how to safely and reliably realize dual-power supply switching.
In a first aspect, the present utility model provides a dual power supply circuit comprising: the device comprises a first power supply, a second power supply, a current-limiting control device and a unidirectional control device; the output voltage of the first power supply is larger than the output voltage of the second power supply;
the output end of the first power supply is connected with the input end of the current-limiting control device, and the output end of the current-limiting control device is connected with the power supply output end of the dual-power supply circuit; the power supply output end is used for connecting load equipment;
the output end of the second power supply is connected with the unidirectional input end of the unidirectional control device, and the unidirectional output end of the unidirectional control device is connected with the power supply output end;
when the current required by the load equipment is smaller than the limiting current of the current limiting control device, the first power supply supplies power to the load equipment; when the current required by the load equipment is larger than the limiting current, the second power supply supplies power to the load equipment;
optionally, the current limiting control device comprises a current limiting resistor;
the first end of the current limiting resistor is connected with the output end of the first power supply, and the second end of the current limiting resistor is connected with the power supply output end;
when the current required by the load equipment is smaller than the limiting current of the current limiting resistor, the first power supply supplies power to the load equipment after the current is limited by the current limiting resistor;
optionally, the current limiting resistor is a variable resistor;
optionally, the unidirectional control device comprises a diode;
the anode of the diode is connected with the output end of the second power supply, and the cathode of the diode is connected with the power supply output end;
when the current required by the load equipment is larger than the limiting current, the second power supply supplies power to the load equipment after passing through the diode;
optionally, the output current of the first power supply is equal to the output current of the second power supply;
optionally, the first power supply and the second power supply are both constant voltage power supplies;
optionally, the dual-power supply circuit further comprises a filter capacitor;
the first end of the filter capacitor is connected with the power supply output end, and the second end of the filter capacitor is grounded.
In a second aspect, the present utility model provides a dual power supply device comprising a dual power supply circuit as described in any one of the first aspects.
Compared with the prior art, the technical scheme provided by the embodiment of the utility model has the following advantages:
the dual-power supply circuit provided by the embodiment of the utility model comprises: the device comprises a first power supply, a second power supply, a current-limiting control device and a unidirectional control device; the output voltage of the first power supply is larger than the output voltage of the second power supply; the output end of the first power supply is connected with the input end of the current-limiting control device, and the output end of the current-limiting control device is connected with the power supply output end of the dual-power supply circuit; the power supply output end is used for connecting load equipment; the output end of the second power supply is connected with the unidirectional input end of the unidirectional control device, and the unidirectional output end of the unidirectional control device is connected with the power supply output end; when the current required by the load equipment is smaller than the limiting current of the current limiting control device, the first power supply supplies power to the load equipment; and when the current required by the load equipment is larger than the limiting current, the second power supply supplies power to the load equipment. According to the dual-power supply circuit, the current limiting control device is arranged on the first power supply, the unidirectional control device is arranged on the second power supply, and the first power supply or the second power supply can be switched automatically according to the magnitude relation between the current required by the load equipment and the limiting current, so that the dual-power supply circuit is safe and reliable.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a schematic structural diagram of a dual-power supply circuit according to an embodiment of the present utility model;
fig. 2 is a schematic circuit diagram of a dual-power supply circuit according to another embodiment of the present utility model.
The reference numerals are as follows:
101-a first power supply; 102-a second power supply; 103-a current limiting control device; 104-a unidirectional control device; 105-load devices;
r1 is a current limiting resistor; d1-diode.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
A first embodiment of the present utility model provides a dual power supply circuit, as in fig. 1, comprising: a first power source 101, a second power source 102, a current-limiting control device 103, and a unidirectional control device 104; the output voltage of the first power supply 101 is greater than the output voltage of the second power supply 102.
The connection relationship is as follows: the output end of the first power supply 101 is connected with the input end of the current-limiting control device 103, the output end of the current-limiting control device 103 is connected with the power supply output end of the dual-power supply circuit, the power supply output end is used for being connected with the load equipment 105, the output end of the second power supply 102 is connected with the unidirectional input end of the unidirectional control device 104, and the unidirectional output end of the unidirectional control device 104 is connected with the power supply output end.
When the current required by the load device 105 is smaller than the limiting current of the current limiting control means 103, the first power supply 101 supplies power to the load device 105, and when the current required by the load device 105 is larger than the limiting current, the second power supply 102 supplies power to the load device 105.
According to the dual-power supply circuit, the current limiting control device 103 is arranged on the branch of the first power supply 101, the unidirectional control device 104 is arranged on the branch of the second power supply 102, and the power supply of the first power supply 101 or the power supply of the second power supply 102 can be switched automatically and safely and reliably according to the magnitude relation between the current required by the load equipment 105 and the limiting current.
The power supply output end of the dual power supply circuit may be a connection point between the output end of the current-limiting control device 103 and the unidirectional output end of the unidirectional control device 104, or may be a single connection port, where the connection mode of the connection port and the load device 105 may be plugging, clamping, wire connection, or other connection modes, and is not limited.
The first power supply 101 and the second power supply 102 may be constant voltage power supplies, so as to ensure that the output voltage of the first power supply 101 is greater than the output voltage of the second power supply 102, and the output current of the first power supply 101 may be set to be equal to the output current of the second power supply 102. It should be understood that, after the output current of the first power supply 101 is limited by the current limiting control device 103, the limiting current output from the output end of the current limiting control device 103 is smaller than the output current of the second power supply 102.
In this embodiment, when the current required by the load device 105 is smaller than the limiting current of the current-limiting control apparatus 103, the voltage of the first power source 101 is higher than the voltage of the second power source 102, so that the load device 105 draws power from the first power source 101, and at this time, the unidirectional control apparatus 104 is turned off, so that the current of the first power source 101 can be prevented from flowing to the second power source 102.
When the current required by the load device 105 is greater than the limiting current of the current limiting control device 103, the first power supply 101 is blocked by the current limiting control device 103, the electric quantity of the load device 105 is derived from the second power supply 102, and the output current of the first power supply 101 is extremely small and can be ignored. Thereby enabling the first power source 101 to supply power when the current required by the load device 105 is small; when the required current is larger, the second power supply 102 supplies power, so that the automatic switching of the dual power supplies of the load equipment when the required current changes is realized, the circuit is simple, and the work is safe and reliable.
The change of the required current of the load device may be, but not limited to, a change of the required current caused by switching different load devices or a change of the required current caused by the load device being in different working states. The load device may be an electric device, or may be a circuit connected to the electric device, without limitation.
In this embodiment, according to the difference of power consumption of the load device, the two power supplies can be automatically switched, without adding a controller and a switching device, the circuit is simple and easy to implement, and because the two power supplies are indirectly connected to the power supply output end, the load device is not at risk of power failure in the switching process, and the switching process is safe and reliable.
In one embodiment, as shown in fig. 2, the current limiting function of the current limiting control device 103 may be implemented by a resistor, such as the current limiting control device 103 includes a current limiting resistor R1.
The first end of the current limiting resistor R1 is connected with the output end of the first power supply 101, the second end of the current limiting resistor R1 is connected with the power supply output end, and when the current required by the load equipment 105 is smaller than the limiting current of the current limiting resistor R1, the first power supply 101 supplies power to the load equipment 105 after current limiting through the current limiting resistor R1.
Note that, the current limiting resistor R1 may be one resistor, or may be a plurality of resistors connected in series or parallel, the number is not limited, and the type of the current limiting resistor R1 is not limited, and may be a fixed resistor or a variable resistor. When the current limiting resistor R1 is a variable resistor, the dual-power supply circuit can adaptively adjust the resistance value of R1 according to different currents required by load equipment in an application scene, so that the limiting current is in a change interval of the currents required by the load equipment, the suitability of the dual-power supply circuit is stronger, and the situation that the limiting current is larger than the upper limit of the change interval, the first power supply is always used for supplying power, or the limiting current is smaller than the lower limit of the change interval, and the second power supply is always used for supplying power is avoided.
The unidirectional function of unidirectional control device 104 may be implemented by a diode, such as unidirectional control device 104 including diode D1.
The anode of the diode D1 is connected to the output terminal of the second power supply 102, and the cathode of the diode D1 is connected to the power supply output terminal, so that when the current required by the load device 105 is greater than the limiting current, the second power supply 102 supplies power to the load device 105 after passing through the diode D1.
In this embodiment, when the current required by the load device 105 is smaller than the limiting current output after the current is limited by the current limiting resistor R1, the load device 105 takes power from the first power source 101 because the voltage of the first power source 101 is higher than the voltage of the second power source 102, and at this time, the voltage of the cathode of the diode D1 is greater than the voltage of the anode, the diode D1 is turned off, so that the current of the first power source 101 can be prevented from flowing to the second power source 102.
When the current required by the load device 105 is greater than the limiting current output by the current limiting resistor R1, the first power supply 101 is blocked by the current limiting resistor R1, and the output current of the second power supply 102 is not limited and is greater than the current required by the load device 105, so that the electric quantity of the load device 105 is derived from the second power supply 102, and at the moment, the output current of the first power supply 101 is extremely small and can be ignored. Therefore, when the required current of the load equipment 105 is smaller, the first power supply 101 supplies power, and when the required current is larger, the second power supply 102 supplies power, so that when the required current of the load equipment changes (different load equipment is switched to cause the change of the required current, or the working state of the load equipment changes to cause the change of the required current), the double-power automatic switching device is realized, and the circuit is simple and safe and reliable in operation.
The dual-power supply circuit can switch power supply according to different load devices, so that the limitation of current and power of the load devices is realized through switching the power supply.
In order to avoid interference at the power supply output end, the dual-power supply circuit may further include a filter capacitor, a first end of the filter capacitor is connected to the power supply output end, and a second end of the filter capacitor is grounded.
Based on the same technical concept, a second embodiment of the present utility model provides a dual power supply device, which includes the dual power supply circuit of any one of the first embodiments.
According to the dual-power supply device, the dual-power supply circuit can realize automatic switching of dual power supply according to power consumption of load equipment, the circuit is simple, the dual-power supply switching process is safe and reliable, and the application scene of the dual-power supply device is improved.
It should be noted that in this document, 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. Moreover, 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 one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. In the description, suffixes such as "module", "part" or "unit" for representing elements are used only for facilitating the description of the present utility model, and have no specific meaning per se. Thus, "module," "component," or "unit" may be used in combination.
The foregoing is only a specific embodiment of the utility model to enable those skilled in the art to understand or practice the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A dual power supply circuit, the dual power supply circuit comprising: the device comprises a first power supply, a second power supply, a current-limiting control device and a unidirectional control device; the output voltage of the first power supply is larger than the output voltage of the second power supply;
the output end of the first power supply is connected with the input end of the current-limiting control device, and the output end of the current-limiting control device is connected with the power supply output end of the dual-power supply circuit; the power supply output end is used for connecting load equipment;
the output end of the second power supply is connected with the unidirectional input end of the unidirectional control device, and the unidirectional output end of the unidirectional control device is connected with the power supply output end;
when the current required by the load equipment is smaller than the limiting current of the current limiting control device, the first power supply supplies power to the load equipment; and when the current required by the load equipment is larger than the limiting current, the second power supply supplies power to the load equipment.
2. The dual power supply circuit of claim 1, wherein the current limiting control means comprises a current limiting resistor;
the first end of the current limiting resistor is connected with the output end of the first power supply, and the second end of the current limiting resistor is connected with the power supply output end;
when the current required by the load equipment is smaller than the limiting current of the current limiting resistor, the first power supply supplies power to the load equipment after the current is limited by the current limiting resistor.
3. The dual power supply circuit of claim 2, wherein the current limiting resistor is a variable resistor.
4. The dual power supply circuit of claim 1, wherein the unidirectional control device comprises a diode;
the anode of the diode is connected with the output end of the second power supply, and the cathode of the diode is connected with the power supply output end;
and when the current required by the load equipment is larger than the limiting current, the second power supply supplies power to the load equipment after passing through the diode.
5. The dual power supply circuit of claim 1, wherein the output current of the first power supply is equal to the output current of the second power supply.
6. The dual power supply circuit of claim 1, wherein the first power supply and the second power supply are both constant voltage power supplies.
7. The dual power supply circuit of claim 1, further comprising a filter capacitor;
the first end of the filter capacitor is connected with the power supply output end, and the second end of the filter capacitor is grounded.
8. A dual power supply device, characterized in that it comprises a dual power supply circuit as claimed in any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321040153.XU CN220156279U (en) | 2023-05-04 | 2023-05-04 | Dual-power supply circuit and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321040153.XU CN220156279U (en) | 2023-05-04 | 2023-05-04 | Dual-power supply circuit and device |
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| Publication Number | Publication Date |
|---|---|
| CN220156279U true CN220156279U (en) | 2023-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202321040153.XU Active CN220156279U (en) | 2023-05-04 | 2023-05-04 | Dual-power supply circuit and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117543803A (en) * | 2024-01-10 | 2024-02-09 | 深圳深蕾科技股份有限公司 | Dual-power on-line standby circuit and control method thereof |
-
2023
- 2023-05-04 CN CN202321040153.XU patent/CN220156279U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117543803A (en) * | 2024-01-10 | 2024-02-09 | 深圳深蕾科技股份有限公司 | Dual-power on-line standby circuit and control method thereof |
| CN117543803B (en) * | 2024-01-10 | 2024-06-07 | 深圳深蕾科技股份有限公司 | Dual-power on-line standby circuit and control method thereof |
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Address after: 710018 Floor 10, Block H, Kairui Building, Fengcheng 12th Road, Xi'an Economic and Technological Development Zone, Shaanxi Province Patentee after: Lixun Technology (Xi'an) Co.,Ltd. Address before: 710018 Floor 10, Block H, Kairui Building, Fengcheng 12th Road, Xi'an Economic and Technological Development Zone, Shaanxi Province Patentee before: Lixun Precision Technology (Xi'an) Co.,Ltd. |