CN114050639A - Main/standby power supply switching device and control method thereof - Google Patents
Main/standby power supply switching device and control method thereof Download PDFInfo
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- CN114050639A CN114050639A CN202111249899.7A CN202111249899A CN114050639A CN 114050639 A CN114050639 A CN 114050639A CN 202111249899 A CN202111249899 A CN 202111249899A CN 114050639 A CN114050639 A CN 114050639A
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- power supply
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
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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
-
- 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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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention relates to a main and standby power supply switching device and a control method thereof. According to the technical scheme provided by the invention, through the topological structure design of the main and standby power supply switching device and the corresponding control method, the switching of each power supply loop according to the preset priority and the power supply input condition of each input port is realized, the reliability of system power supply is greatly improved, and the flexibility and the economy are high.
Description
Technical Field
The invention relates to the technical field of power electronics, in particular to a main and standby power supply switching device and a control method thereof.
Background
The power supply for the system power supply comprises a main power supply and a standby power supply, and generally comprises the main power supply, the main standby power supply and a secondary standby power supply. How to switch the output power according to the situation of the three power supplies becomes an urgent problem to be solved.
Disclosure of Invention
Based on the above situation in the prior art, an object of the present invention is to provide a switching device for main and standby power supplies and a control method thereof, which can switch each power supply loop according to a preset priority and a power input condition of each input port, thereby greatly improving reliability of system power supply and having high flexibility and economy.
In order to achieve the above object, according to an aspect of the present invention, there is provided a main/standby power supply switching device, including a power supply switching module;
the power supply switching module comprises a first power supply loop, a second power supply loop and a third power supply loop;
the power supply switching module is respectively connected with the main power supply input port, the power supply output port, the first standby power supply input port and the second standby power supply input port;
the main power supply input port is used for inputting a main power supply to the power supply switching module; the first standby power supply input port is used for inputting a first standby power supply to the power supply switching module; the second standby power supply input port is used for inputting a second standby power supply to the power supply switching module;
the power supply switching module is used for switching each power supply loop according to the preset priority and the power supply input condition of each input port so as to output the power supply from the power supply output port.
Further, the preset priority includes:
priority of the primary power supply > priority of the first backup power supply > priority of the second backup power supply.
Further, the first backup power source and the second backup power source comprise batteries;
the battery capacity of the first backup power source > the battery capacity of the second backup power source.
Further, the first power supply circuit includes a first diode.
Further, the second power supply circuit includes a first switching tube and a fourth switching tube.
Further, the third power supply circuit includes a second switching tube, a third switching tube and a fifth switching tube.
Further, the power supply switching module switches the power supply loop according to the preset priority and the power supply input condition of each input port, and the method includes:
the power supply switching module controls the on-off of the first switch tube, the second switch tube, the third switch tube, the fourth switch tube and the fifth switch tube so as to realize the switching of a power supply loop.
According to a second aspect of the present invention, there is provided a control method for a main/standby power supply switching device according to the first aspect of the present invention, including:
when only the second standby power supply input port has an input power supply, the second switching tube, the third switching tube and the fifth switching tube are controlled to be conducted, and the power supply output port outputs a power supply through the second standby power supply;
when only the first standby power supply input port has an input power supply, the second switching tube, the third switching tube and the fifth switching tube are controlled to be cut off, the first switching tube and the fourth switching tube are controlled to be conducted, and the power supply output port outputs a power supply through the first standby power supply;
when only the input power supply is arranged at the input port of the main power supply, the power supply output port outputs the power supply through the main power supply.
Further, the method also comprises the following steps:
when input power is provided at the first standby power input port and the second standby power input port, the second switching tube, the third switching tube and the fifth switching tube are controlled to be cut off, the first switching tube and the fourth switching tube are controlled to be conducted, and the power output port outputs power supply through the first standby power;
when the first standby power supply input port and the main power supply input port have input power supplies, the second switching tube, the third switching tube and the fifth switching tube are controlled to be cut off, the first switching tube is controlled to be conducted, and the power supply output port outputs the power supply through the main power supply;
when the second standby power supply input port and the main power supply input port have input power supplies, the second switching tube, the third switching tube and the fifth switching tube are controlled to be conducted, and the power supply output port outputs the power supply through the main power supply.
Further, the method also comprises the following steps:
when the first standby power supply input port, the second standby power supply input port and the main power supply input port are provided with input power supplies, the second switch tube, the third switch tube and the fifth switch tube are controlled to be cut off, and the power supply output port outputs the power supply through the main power supply.
In summary, the present invention provides a switching device for a main/standby power supply and a control method thereof, where the switching device includes a power supply switching module composed of a first power supply loop, a second power supply loop, and a third power supply loop, and the power supply switching module switches each power supply loop according to a preset priority and a power input condition of each input port to output a power supply from the power output port. According to the technical scheme provided by the invention, through the topological structure design of the main and standby power supply switching device and the corresponding control method, the switching of each power supply loop according to the preset priority and the power supply input condition of each input port is realized, the reliability of system power supply is greatly improved, and the flexibility and the economy are high.
Drawings
Fig. 1 is a schematic circuit structure diagram of a main/standby power supply switching device according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
In general, the power supply for system power supply includes a main power supply and a backup power supply, which respectively include a main power supply, and the main backup power supply and the secondary backup power supply are batteries. When any one of the three power supplies exists, the circuit can work to supply power to the system; two paths of power supplies exist, and the power supply with high priority supplies power to the system, so that the electric quantity of the power supply with low priority is saved; the three power supplies exist simultaneously, and only the main power supply with the highest priority is accessed, so that the electric quantity of the two backup power supply batteries is saved; when two or three power supplies exist simultaneously, if the power supply with high priority is powered off, the power supply with low priority continues to be powered on; when the main power supply is powered off, the main standby power supply is automatically put into operation, and when the main standby power supply is powered off, the secondary standby power supply is automatically put into operation, so that the reliability of supplying power to the system can be greatly improved. Meanwhile, when the main power supply is recovered, the standby power supply is automatically disconnected, and the system has high flexibility and economy in power supply. The technical solutions provided by the embodiments of the present invention are explained below.
According to an embodiment of the present invention, a main/standby power supply switching device is provided, a schematic circuit structure diagram of the main/standby power supply switching device is shown in fig. 1, and the device includes a power supply switching module; the power supply switching module comprises a first power supply loop, a second power supply loop and a third power supply loop; the power supply switching module is respectively connected with a main power supply input port VIN _5V, a power output port VOUT, a first standby power supply input port BAT1_3V8 and a second standby power supply input port BAT2_3V 8; the main power supply input port VIN _5V is used for inputting a main power supply to the power supply switching module; the first standby power input port BAT1_3V8 is used for inputting a first standby power to the power switching module; the second standby power input port BAT2_3V8 is used for inputting a second standby power to the power switching module; the power supply switching module is used for switching each power supply loop according to preset priority and power supply input conditions of each input port so as to output a power supply from the power supply output port VOUT. The power output port VOUT will take power from a power source with a high priority, preferentially use an external power source, and then a battery with a large capacity, and finally a battery with a smaller capacity, according to the above description, the preset priority is generally set in the following manner:
priority of the primary power supply > priority of the first backup power supply > priority of the second backup power supply.
The first backup power source and the second backup power source are typically batteries, wherein,
the battery capacity of the first backup power source > the battery capacity of the second backup power source.
As shown in fig. 1, the first power supply circuit includes a first diode D1, the second power supply circuit includes a first switching tube Q1 and a fourth switching tube Q4, and the third power supply circuit includes a second switching tube Q2, a third switching tube Q3 and a fifth switching tube Q5. The first switch tube Q1 and the second switch tube Q2 are NMOS switch tubes, and the third switch tube Q3, the fourth switch tube Q4 and the fifth switch tube Q5 are PMOS switch tubes. The power switching module further comprises a first resistor R1, a second resistor R2, a third resistor R3 and a fourth resistor R4. In each power supply loop, the anode of the first diode D1 is connected to the main power supply input port VIN _5V, and the cathode is directly connected to the power output port VOUT, so as to directly output the main power supply to the power output port VOUT; a control electrode of the first switch tube Q1 is connected with a first standby power supply input port BAT1_3V8, a drain electrode of the first switch tube Q1 is connected with a control electrode of the second switch tube Q2, a drain electrode of the second switch tube Q2 is connected with a control electrode of the third switch tube Q3, a drain electrode of the fourth switch tube Q4 is connected with a first standby power supply input port BAT1_3V8 and is controlled to be connected with a main power supply input port VIN _5V, and a drain electrode of the third switch tube Q3 and a source electrode of the fourth switch tube Q4 are commonly connected with a power supply output port VOUT to form a second power supply loop; the drain of the fifth switching tube Q5 is connected to the second standby power input port BAT2_3V8, the control electrode is connected to the control electrode of the third switching tube Q3, and the source of the fifth switching tube Q5 is connected to the source of the third switching tube Q3, so as to form a third power supply loop.
The power supply switching module switches the power supply loop according to the preset priority and the power input condition of each input port, namely the power supply switching module controls the on-off of the first switch tube, the second switch tube, the third switch tube, the fourth switch tube and the fifth switch tube so as to realize the switching of the power supply loop.
According to a second embodiment of the present invention, there is provided a control method for a main/standby power supply switching device according to the first embodiment of the present invention, including:
when only a second standby power supply input port BAT2_3V8 has input power supply, the second switch tube Q2, the third switch tube Q3 and the fifth switch tube Q5 are controlled to be conducted, and the power supply output port VOUT outputs power supply through the second standby power supply;
when only the first standby power input port BAT1_3V8 has input power, the second switch tube Q2, the third switch tube Q3 and the fifth switch tube Q5 are controlled to be cut off, the first switch tube Q1 and the fourth switch tube Q4 are controlled to be switched on, and the power output port VOUT outputs power supply through the first standby power;
when only the main power supply input port VIN _5V has an input power supply, the power output port VOUT outputs a power supply through the main power supply.
When the first standby power supply input port BAT1_3V8 and the second standby power supply input port BAT2_3V8 have input power supplies, the second switch tube Q2, the third switch tube Q3 and the fifth switch tube Q5 are controlled to be cut off, the first switch tube Q1 and the fourth switch tube Q4 are controlled to be conducted, and the power supply output port VOUT outputs power supply through the first standby power supply;
when the first standby power input port BAT1_3V8 and the main power supply input port VIN _5V have input power, the second switch tube Q2, the third switch tube Q3 and the fifth switch tube Q5 are controlled to be cut off, the first switch tube Q1 is controlled to be switched on, the main power supply input port VIN _5V is connected to the power output port VOUT through the first diode D1, and the first standby power input port BAT1_3V8 is connected to the power output port VOUT through the body diode of the fourth switch tube Q4, because the main power supply is large, the power output port VOUT takes power from the main power supply input port VIN _5V, and the power output port VOUT outputs power through the main power supply;
when the second standby power supply input port BAT2_3V8 and the main power supply input port VIN _5V have input power supplies, the second switch tube Q2, the third switch tube Q3 and the fifth switch tube Q5 are controlled to be conducted, the second standby power supply input port BAT2_3V8 is controlled to reach the power supply output port VOUT, and the main power supply input port VIN _5V is controlled to reach the power supply output port VOUT through the first diode D1.
When the first standby power input port BAT1_3V8, the second standby power input port BAT2_3V8 and the main power supply input port VIN _5V all have input power, the second switch tube Q2, the third switch tube Q3 and the fifth switch tube Q5 are controlled to be cut off, and the power output port VOUT outputs power supply through the main power supply.
In summary, the present invention relates to a switching device for a main power supply and a standby power supply and a control method thereof, the switching device includes a power supply switching module composed of a first power supply loop, a second power supply loop and a third power supply loop, and the power supply switching module switches each power supply loop according to a preset priority and a power input condition of each input port to output a power supply from the power output port. According to the technical scheme provided by the invention, through the topological structure design of the main and standby power supply switching device and the corresponding control method, the switching of each power supply loop according to the preset priority and the power supply input condition of each input port is realized, the reliability of system power supply is greatly improved, and the flexibility and the economy are high.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (10)
1. A main and standby power supply switching device is characterized by comprising a power supply switching module;
the power supply switching module comprises a first power supply loop, a second power supply loop and a third power supply loop;
the power supply switching module is respectively connected with the main power supply input port, the power supply output port, the first standby power supply input port and the second standby power supply input port;
the main power supply input port is used for inputting a main power supply to the power supply switching module; the first standby power supply input port is used for inputting a first standby power supply to the power supply switching module; the second standby power supply input port is used for inputting a second standby power supply to the power supply switching module;
the power supply switching module is used for switching each power supply loop according to the preset priority and the power supply input condition of each input port so as to output the power supply from the power supply output port.
2. The apparatus of claim 1, wherein the pre-set priority comprises:
priority of the primary power supply > priority of the first backup power supply > priority of the second backup power supply.
3. The apparatus of claim 2, wherein the first backup power source and the second backup power source comprise batteries;
the battery capacity of the first backup power source > the battery capacity of the second backup power source.
4. The apparatus of claim 3, wherein the first supply loop comprises a first diode.
5. The apparatus of claim 4, wherein the second power supply circuit comprises a first switching tube and a fourth switching tube.
6. The apparatus of claim 5, wherein the third power circuit comprises a second switching tube, a third switching tube, and a fifth switching tube.
7. The apparatus of claim 6, wherein the power switching module switches the power supply loop according to the preset priority and the power input condition of each input port, and comprises:
the power supply switching module controls the on-off of the first switch tube, the second switch tube, the third switch tube, the fourth switch tube and the fifth switch tube so as to realize the switching of a power supply loop.
8. A control method of the main/standby power supply switching device according to any one of claims 1 to 7, comprising:
when only the second standby power supply input port has an input power supply, the second switching tube, the third switching tube and the fifth switching tube are controlled to be conducted, and the power supply output port outputs a power supply through the second standby power supply;
when only the first standby power supply input port has an input power supply, the second switching tube, the third switching tube and the fifth switching tube are controlled to be cut off, the first switching tube and the fourth switching tube are controlled to be conducted, and the power supply output port outputs a power supply through the first standby power supply;
when only the input power supply is arranged at the input port of the main power supply, the power supply output port outputs the power supply through the main power supply.
9. The method of claim 8, further comprising:
when input power is provided at the first standby power input port and the second standby power input port, the second switching tube, the third switching tube and the fifth switching tube are controlled to be cut off, the first switching tube and the fourth switching tube are controlled to be conducted, and the power output port outputs power supply through the first standby power;
when the first standby power supply input port and the main power supply input port have input power supplies, the second switching tube, the third switching tube and the fifth switching tube are controlled to be cut off, the first switching tube is controlled to be conducted, and the power supply output port outputs the power supply through the main power supply;
when the second standby power supply input port and the main power supply input port have input power supplies, the second switching tube, the third switching tube and the fifth switching tube are controlled to be conducted, and the power supply output port outputs the power supply through the main power supply.
10. The method of claim 9, further comprising:
when the first standby power supply input port, the second standby power supply input port and the main power supply input port are provided with input power supplies, the second switch tube, the third switch tube and the fifth switch tube are controlled to be cut off, and the power supply output port outputs the power supply through the main power supply.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111249899.7A CN114050639A (en) | 2021-10-26 | 2021-10-26 | Main/standby power supply switching device and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111249899.7A CN114050639A (en) | 2021-10-26 | 2021-10-26 | Main/standby power supply switching device and control method thereof |
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| CN114050639A true CN114050639A (en) | 2022-02-15 |
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| CN202111249899.7A Pending CN114050639A (en) | 2021-10-26 | 2021-10-26 | Main/standby power supply switching device and control method thereof |
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