CN211183522U - Main/standby direct-current power supply input switching control circuit - Google Patents
Main/standby direct-current power supply input switching control circuit Download PDFInfo
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- CN211183522U CN211183522U CN201922301217.7U CN201922301217U CN211183522U CN 211183522 U CN211183522 U CN 211183522U CN 201922301217 U CN201922301217 U CN 201922301217U CN 211183522 U CN211183522 U CN 211183522U
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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 master-slave direct current power supply input switching control circuit, which comprises a master power supply switching circuit, a slave power supply switching circuit and a switching control circuit, wherein the input end of a second optical coupling relay in the switching control circuit is connected with the master power supply switching circuit, the positive electrode of the output end is connected with a third MOS tube grid electrode, and a third MOS tube leakage and a source electrode are respectively connected with the negative electrode of the input end of a third optical coupling relay and the positive electrode of the input end of a fourth optical coupling relay; the positive electrodes of the output ends of the third and fourth optocoupler relays are connected with a standby power switch circuit; the power supply end of the operational amplifier is connected with a main power supply switch circuit, the in-phase input end and the reverse-phase input end are respectively connected with a main power supply input end and an auxiliary source, the output end of the operational amplifier is connected with the anode of the input end of a sixth optical coupling relay, the cathode of the input end of the sixth optical coupling relay is connected with the anode of the input end of a seventh optical coupling relay, and the output end of the sixth optical coupling relay is connected with; and the positive electrode of the output end of the seventh optical coupling relay is connected with the grid electrode of the third MOS tube, and the power ground is connected with the negative electrode of the output end of the power supply. The utility model discloses response speed is fast, and the reliability is high.
Description
Technical Field
The utility model belongs to the technical field of the mains operated technique and specifically relates to a activestandby direct current power supply input switching control circuit is related to.
Background
In a power supply system, in order to ensure normal and uninterrupted operation of the system, stable and reliable power supply equipment needs to be provided for important equipment. For such a situation, the common input is realized by adopting a redundancy design, namely, two sets of power supply modes are adopted, one set of main input power supply and the other set of standby input power supply, and the switching between the main power supply and the standby power supply is very important for uninterrupted and stable operation of equipment. However, if the main input is automatically switched to the standby input when there is no input or the main input voltage is abnormal, or the standby input is shielded to be switched to the main power supply when the main input is restored to the set normal voltage, the switching needs to be accomplished by using a corresponding circuit. The existing switching device has the disadvantages of complex structure, high cost and low switching speed.
Disclosure of Invention
In order to solve the above problem, the present invention provides a main and standby dc power input switching control circuit, which has simple design and high reliability, and can realize the fast switching of the main and standby dc power.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a master-slave DC power input switching control circuit comprises a main power switch circuit, a slave power switch circuit and a switching control circuit connected with the main power switch circuit and the slave power switch circuit, the switching control circuit comprises a second optical coupling relay OP2, a third MOS tube M3, a third optical coupling relay OP3, a fourth optical coupling relay OP4, an operational amplifier U1, a sixth optical coupling relay OP6 and a seventh optical coupling relay OP7, wherein the input end of the second optical coupling relay OP2 is connected with a main power switch circuit, the anode of the output end of the second optical coupling relay OP2 is connected with the grid of the third MOS tube M3 through a voltage stabilizing diode D1, the drain of the third MOS tube M3 is connected with the cathode of the input end of the third optical coupling relay OP3, the source is connected with the anode of the input end of the fourth optical coupling relay OP4, the cathode of the voltage stabilizing diode D1 and the anode of the input end of the third optical coupling relay OP3 are respectively connected with a voltage source VCC through a sixth resistor R6 and a seventh resistor R7; the positive pole of the output end of the third optical coupling relay OP3 and the positive pole of the output end of the fourth optical coupling relay OP4 are connected with a standby power switch circuit; the power supply end of an operational amplifier U1 is connected with a main power switch circuit, the non-inverting input end of the operational amplifier U1 is connected with the main power input end through an eleventh resistor R11, the inverting input end is connected with an auxiliary source, a twelfth resistor R12 is connected between the non-inverting input end and the grounding end, the output end is connected with the positive pole of the input end of a sixth optical coupling relay OP6 through a thirteenth resistor R13, the negative pole of the input end of a sixth optical coupling relay OP6 is connected with the positive pole of the input end of a seventh optical coupling relay OP7, and the output end of the sixth optical coupling relay OP6 is connected with the main power switch circuit; the positive electrode of the output end of the seventh optical coupling relay OP7 is connected with the grid electrode of the third MOS tube M3; the negative pole of the input end and the negative pole of the output end of the second optical coupling relay OP2, the negative pole of the output end of the third optical coupling relay OP3, the negative pole of the input end and the negative pole of the output end of the fourth optical coupling relay OP4, the grounding end of the operational amplifier U1, the negative pole of the output end of the sixth optical coupling relay OP6 and the negative pole of the output end of the seventh optical coupling relay OP7 are all connected with a power ground, and the power ground is connected with the negative pole of the power output end.
Further, the main power switch circuit includes a main power input terminal, a first voltage monitor IC1, a first optical coupling relay OP1 and a first MOS transistor M1, the main power input terminal is connected to a first input terminal of the first voltage monitor IC1 through a third resistor R3, a power terminal of the first voltage monitor IC1 is connected to a voltage source VCC, the input terminal is connected to a ground terminal through a fourth resistor R4, a first output terminal is connected to an anode of the input terminal of the first optical coupling relay OP1, and an anode of the output terminal of the first optical coupling relay OP1 is connected to a gate of the first MOS transistor M1; the source electrode of the first MOS transistor M1 is connected with the main power supply input end, a first resistor R1 is connected between the source electrode and the grid electrode, and the drain electrode is connected with the positive electrode of the power supply output end; the grounding end of the first voltage monitor IC1 and the negative electrode of the output end of the first optical coupling relay OP1 are both connected with the power ground, and the first optical coupling relay OP1 is connected with the positive electrode of the input end of the second optical coupling relay OP2 in the switching control circuit.
Further, the above-mentioned standby power switch circuit includes a standby power input terminal, a second voltage monitor IC2, a fifth optical coupling relay OP5 and a second MOS 2, the standby power input terminal is connected to a first input terminal of the second voltage monitor IC2 through an eighth resistor R8, a power terminal of the second voltage monitor IC2 is connected to a voltage source VCC, the input terminal is connected to a ground terminal through a ninth resistor R9, a first output terminal is connected to an anode of the fifth optical coupling relay OP5 input terminal, an anode of the fifth optical coupling relay OP5 input terminal is connected to a power terminal of the second voltage monitor IC2 through a tenth resistor R10, and an anode of the output terminal is connected to a power terminal of an operational amplifier U1 in the switching control circuit, a cathode of the fifth optical coupling relay OP5 output terminal is connected to a power terminal of the operational amplifier U1; the grid electrode of the second MOS tube M2 is connected with the positive electrode of the output end of a third optical coupling relay OP3 in the switching control circuit, the source electrode of the second MOS tube M2 is connected with the power supply input end, a second resistor R2 is connected between the source electrode and the grid electrode, and the drain electrode is connected with the positive electrode of the power supply output end; the ground terminal of the second voltage monitor IC2 and the negative electrode of the input terminal of the fifth optocoupler relay OP5 are both connected to power ground.
Further, the first MOS transistor M1 and the second MOS transistor M2 are P-channel MOS transistors; the third MOS transistor M3 is an N-channel MOS transistor.
Due to the adoption of the technical scheme, the utility model discloses have following superiority:
the master and standby direct-current power supply input switching control circuit is simple in design, accurate in control, simple and convenient to operate, high in response speed and high in reliability, effectively solves the problems that when the input of a main power supply is not input or is abnormal, the main power supply can be automatically switched to the input of the standby power supply, and when the input of the main power supply is recovered to a set normal voltage, the main power supply is automatically switched to the input of the main power supply, and has a wide application prospect in the master and standby direct-current power supply input switching circuit.
Drawings
Fig. 1 is a schematic diagram of the input switching control circuit of the main/standby dc power supply of the present invention.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and examples.
As shown in fig. 1, the main/standby dc power input switching control circuit includes a main power switch circuit, a standby power switch circuit, and a switching control circuit connected to the main power switch circuit and the standby power switch circuit, where the switching control circuit includes a second optical coupling relay OP2, a third MOS transistor M3, a third optical coupling relay OP3, a fourth optical coupling relay OP4, an operational amplifier U1, a sixth optical coupling relay OP6, and a seventh optical coupling relay OP7, an input end of the second optical coupling relay OP2 is connected to the main power switch circuit, an anode of an output end of the second optical coupling relay OP2 is connected to a gate of the third MOS transistor M3 through a voltage stabilizing diode D1, a drain of the third MOS transistor M3 is connected to a cathode of an input end of the third optical coupling relay OP3, a source is connected to an anode of an input end of the fourth optical coupling relay OP4, a cathode of the voltage stabilizing diode D1, an anode of the third optical coupling relay 3 is connected to a sixth resistor R6, a sixth, The seventh resistor R7 is connected with a voltage source VCC; the positive pole of the output end of the third optical coupling relay OP3 and the positive pole of the output end of the fourth optical coupling relay OP4 are connected with a standby power switch circuit; the power supply end of an operational amplifier U1 is connected with a main power switch circuit, the non-inverting input end of the operational amplifier U1 is connected with the main power input end through an eleventh resistor R11, the inverting input end is connected with an auxiliary source +2.5V, a twelfth resistor R12 is connected between the non-inverting input end and the grounding end, the output end is connected with the anode of the input end of a sixth optical coupling relay OP6 through a thirteenth resistor R13, the cathode of the input end of the sixth optical coupling relay OP6 is connected with the anode of the input end of a seventh optical coupling relay OP7, and the output end of the sixth optical coupling relay OP6 is connected with the main power switch circuit; the positive electrode of the output end of the seventh optical coupling relay OP7 is connected with the grid electrode of the third MOS tube M3; the negative electrode of the input end and the negative electrode of the output end of the second optical coupling relay OP2, the negative electrode of the output end of the third optical coupling relay OP3, the negative electrode of the input end and the negative electrode of the output end of the fourth optical coupling relay OP4, the grounding end of the operational amplifier U1, the negative electrode of the output end of the sixth optical coupling relay OP6 and the negative electrode of the output end of the seventh optical coupling relay OP7 are all connected with a power ground, and the power ground is connected with the negative electrode (-OUT) of the power output end; the power ground is a common ground terminal of the main power supply and the standby power supply.
The main power switch circuit comprises a main power input end, a first voltage monitor IC1, a first optical coupling relay OP1 and a first MOS tube M1, wherein the main power input end is connected with a first input end (pin IN 1) of the first voltage monitor IC1 through a third resistor R3, a power supply end (pin VCC) of the first voltage monitor IC1 is connected with a voltage source VCC, the input end (pin IN 1) is connected with a ground end (pin GND) through a fourth resistor R4, an internal reference source end (pin Vref) is connected with a channel selection end (pin MODE), a first output end (pin OUT 1) is connected with the positive electrode of the input end of the first optical coupling relay OP1, and the positive electrode of the output end of the first optical coupling relay OP1 is connected with the grid electrode of the first MOS tube M1; the source electrode of the first MOS transistor M1 is connected with the input end of the main power supply, a first resistor R1 is connected between the source electrode and the grid electrode, and the drain electrode is connected with the positive electrode (+ OUT) of the output end of the power supply; the grounding end of the first voltage monitor IC1 and the negative electrode of the output end of the first optical coupling relay OP1 are both connected with the power ground, and the first optical coupling relay OP1 is connected with the positive electrode of the input end of the second optical coupling relay OP2 in the switching control circuit.
The above-mentioned standby power switch circuit includes a standby power input terminal, a second voltage monitor IC2, a fifth optical coupling relay OP5 and a second MOS transistor M2, wherein the input end of a standby power supply is connected with the first input end (pin IN 1) of a second voltage monitor IC2 through an eighth resistor R8, the power supply end (pin VCC) of the second voltage monitor IC2 is connected with a voltage source VCC, the input end (pin IN 1) is connected with a ground end (pin GND) through a ninth resistor R9, an internal reference source end (pin Vref) is connected with a channel selection end (pin MODE), the first output end (pin OUT 1) is connected with the anode of the input end of a fifth optical coupling relay OP5, the anode of the input end of the fifth optical coupling relay OP5 is connected with the power supply end (pin VCC) of the second voltage monitor IC2 through a tenth resistor R10 and the anode of the output end, and the cathode of the output end of the fifth optical coupling relay OP5 is connected with the power supply end of an operational amplifier U1 IN the switching control circuit; the grid electrode of the second MOS tube M2 is connected with the positive electrode of the output end of a third optical coupling relay OP3 in the switching control circuit, the source electrode of the second MOS tube M2 is connected with the power supply input end, a second resistor R2 is connected between the source electrode and the grid electrode, and the drain electrode is connected with the positive electrode (+ OUT) of the power supply output end; the ground terminal of the second voltage monitor IC2 and the negative electrode of the input terminal of the fifth optocoupler relay OP5 are both connected to power ground. The power ground is the common ground terminal of the main power supply and the standby power supply.
The first MOS transistor M1 and the second MOS transistor M2 are P-channel MOS transistors; the third MOS transistor M3 is an N-channel MOS transistor.
The models of the first voltage monitor IC1 and the second voltage monitor IC2 are MC33161DG, the models of the first MOS transistor M1 and the second MOS transistor M2 are IRFM260, the model of the third MOS transistor M3 is VN 0808L-G, and the model of the operational amplifier U1 is L M158J/883Q.
The utility model discloses activestandby DC power supply input switching control circuit, its theory of operation is: when the input voltages of the main power supply and the standby power supply are both greater than the voltage of the first switching point, the first output end of the first voltage monitor IC1 outputs a high level, the first optocoupler relay OP1 is switched on to switch on the drain electrode of the first MOS transistor M1 with the power ground, and the source electrode and the drain electrode of the first MOS transistor M1 are switched on, namely the input of the main power supply is switched on; the second optical coupling relay OP2 is switched on, so that the grid and the source of the third MOS tube M3 are cut off, the drain and the source are cut off, the third optical coupling relay OP3 is cut off, the drain of the second MOS tube M2 is cut off from the power ground, and the source and the drain are cut off, namely, the standby power supply is not switched on, and the main power supply supplies power at the moment.
When the main power supply voltage is lower than the first switching point voltage and the standby power supply voltage is normal, namely the standby power supply input voltage is higher than the first switching point voltage, the first output end of the first voltage monitor IC1 outputs a low level to cut off the first optical coupling relay OP 1; a first output end of the second voltage monitor IC2 outputs a high level, the fifth optical coupling relay OP5 is switched on, an output end of the operational amplifier U1 outputs a low level, and the sixth optical coupling relay OP6 is switched off; the first optical coupling relay OP1 and the sixth optical coupling relay OP6 are not conducted, so that the drain of the first MOS transistor M1 is cut off from the power ground, and the source and the drain are cut off, namely the main power supply is not conducted; the second optical coupling relay OP2 is cut off, so that the grid and the source of the third MOS tube M3 are switched on, the drain and the source are switched on, the third optical coupling relay OP3 is switched on, the drain of the second MOS tube M2 is switched on with the power ground, the source and the drain are switched on, namely, the standby power supply is switched on, the main power supply is not switched on, and at the moment, the standby power supply supplies power.
When the main power supply voltage is recovered to a second switching point from a value smaller than the first switching point, the first output end of the second voltage monitor IC2 outputs a high level, the fifth optical coupling relay OP5 is switched on, the output end of the operational amplifier U1 outputs a high level, the sixth optical coupling relay OP6 is switched on, the drain electrode of the first MOS transistor M1 is switched on with the power ground, and the source electrode and the drain electrode are switched on, namely the main power supply supplies power; the seventh optical coupling relay OP7 is switched on to cut off the grid and the source of the third MOS tube M3, the drain and the source, the third optical coupling relay OP3 is cut off to cut off the drain of the second MOS tube M2 and the power ground and the source and the drain, namely, the standby power supply is not switched on, and at the moment, the standby power supply is switched to a main power supply which supplies power.
The utility model discloses a activestandby DC power supply input switching control circuit, it is when activestandby power supply input is normal, the preferred main power supply of selecting, when the main power supply voltage is low, the power automatic switch over to stand-by power supply; when the main power supply recovers to the set normal voltage, the power supply can be automatically switched to the main power supply to supply power, so that the power supply is always output, and the power supply reliability of the power supply equipment is improved.
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 (6)
1. A master-standby direct current power supply input switching control circuit comprises a main power supply switch circuit, a standby power supply switch circuit and a switching control circuit connected with the main power supply switch circuit and the standby power supply switch circuit, and is characterized in that: the switching control circuit comprises a second optical coupling relay OP2, a third MOS tube M3, a third optical coupling relay OP3, a fourth optical coupling relay OP4, an operational amplifier U1, a sixth optical coupling relay OP6 and a seventh optical coupling relay OP7, wherein the input end of the second optical coupling relay OP2 is connected with a main power switch circuit, the anode of the output end of the second optical coupling relay OP2 is connected with the grid of the third MOS tube M3 through a voltage stabilizing diode D1, the drain of the third MOS tube M3 is connected with the cathode of the input end of the third optical coupling relay OP3, the source is connected with the anode of the input end of the fourth optical coupling relay OP4, the cathode of the voltage stabilizing diode D1 and the anode of the input end of the third optical coupling relay OP3 are respectively connected with a voltage source VCC through a sixth resistor R6 and a seventh resistor R7; the positive pole of the output end of the third optical coupling relay OP3 and the positive pole of the output end of the fourth optical coupling relay OP4 are connected with a standby power switch circuit; the power supply end of an operational amplifier U1 is connected with a main power switch circuit, the non-inverting input end of the operational amplifier U1 is connected with the main power input end through an eleventh resistor R11, the inverting input end is connected with an auxiliary source, a twelfth resistor R12 is connected between the non-inverting input end and the grounding end, the output end is connected with the positive pole of the input end of a sixth optical coupling relay OP6 through a thirteenth resistor R13, the negative pole of the input end of a sixth optical coupling relay OP6 is connected with the positive pole of the input end of a seventh optical coupling relay OP7, and the output end of the sixth optical coupling relay OP6 is connected with the main power switch circuit; the positive electrode of the output end of the seventh optical coupling relay OP7 is connected with the grid electrode of the third MOS tube M3; the negative pole of the input end and the negative pole of the output end of the second optical coupling relay OP2, the negative pole of the output end of the third optical coupling relay OP3, the negative pole of the input end and the negative pole of the output end of the fourth optical coupling relay OP4, the grounding end of the operational amplifier U1, the negative pole of the output end of the sixth optical coupling relay OP6 and the negative pole of the output end of the seventh optical coupling relay OP7 are all connected with a power ground, and the power ground is connected with the negative pole of the power output end.
2. The input switching control circuit for main and standby direct-current power supplies according to claim 1, characterized in that: the main power switch circuit comprises a main power input end, a first voltage monitor IC1, a first optical coupling relay OP1 and a first MOS transistor M1, wherein the main power input end is connected with a first input end of the first voltage monitor IC1 through a third resistor R3, a power supply end of the first voltage monitor IC1 is connected with a voltage source VCC, the input end is connected with a grounding end through a fourth resistor R4, a first output end is connected with the positive electrode of the input end of the first optical coupling relay OP1, and the positive electrode of the output end of the first optical coupling relay OP1 is connected with the grid electrode of the first MOS transistor M1; the source electrode of the first MOS transistor M1 is connected with the main power supply input end, a first resistor R1 is connected between the source electrode and the grid electrode, and the drain electrode is connected with the positive electrode of the power supply output end; the grounding end of the first voltage monitor IC1 and the negative electrode of the output end of the first optical coupling relay OP1 are both connected with the power ground, and the first optical coupling relay OP1 is connected with the positive electrode of the input end of the second optical coupling relay OP2 in the switching control circuit.
3. The input switching control circuit for main and standby direct-current power supplies according to claim 1, characterized in that: the standby power supply switching circuit comprises a standby power supply input end, a second voltage monitor IC2, a fifth optical coupling relay OP5 and a second MOS tube M2, wherein the standby power supply input end is connected with a first input end of the second voltage monitor IC2 through an eighth resistor R8, a power supply end of the second voltage monitor IC2 is connected with a voltage source VCC, the input end is connected with a grounding end through a ninth resistor R9, a first output end is connected with the anode of the input end of the fifth optical coupling relay OP5, the anode of the input end of the fifth optical coupling relay OP5 is connected with the power supply end of the second voltage monitor IC2 through a tenth resistor R10, the anode of the output end is connected with the power supply end of an operational amplifier U1 in a switching control circuit, and the cathode of the output end of the fifth optical coupling relay OP5 is connected with the; the grid electrode of the second MOS tube M2 is connected with the positive electrode of the output end of a third optical coupling relay OP3 in the switching control circuit, the source electrode of the second MOS tube M2 is connected with the power supply input end, a second resistor R2 is connected between the source electrode and the grid electrode, and the drain electrode is connected with the positive electrode of the power supply output end; the ground terminal of the second voltage monitor IC2 and the negative electrode of the input terminal of the fifth optocoupler relay OP5 are both connected to power ground.
4. The input switching control circuit for main and standby direct-current power supplies according to claim 1, characterized in that: the third MOS transistor M3 is an N-channel MOS transistor.
5. The input switching control circuit for main and standby direct-current power supplies according to claim 2, characterized in that: the first MOS transistor M1 is a P-channel MOS transistor.
6. The main/standby direct-current power supply input switching control circuit according to claim 3, characterized in that: the second MOS transistor M2 is a P-channel MOS transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922301217.7U CN211183522U (en) | 2019-12-20 | 2019-12-20 | Main/standby direct-current power supply input switching control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922301217.7U CN211183522U (en) | 2019-12-20 | 2019-12-20 | Main/standby direct-current power supply input switching control circuit |
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| Publication Number | Publication Date |
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| CN211183522U true CN211183522U (en) | 2020-08-04 |
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| CN201922301217.7U Expired - Fee Related CN211183522U (en) | 2019-12-20 | 2019-12-20 | Main/standby direct-current power supply input switching control circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112615419A (en) * | 2020-12-18 | 2021-04-06 | 上海微阱电子科技有限公司 | Dual-power automatic switching circuit |
| CN114069829A (en) * | 2021-11-22 | 2022-02-18 | 北京计算机技术及应用研究所 | Double-circuit redundant power supply auto-switch and recovery circuit |
| CN114123466A (en) * | 2021-11-22 | 2022-03-01 | 北京计算机技术及应用研究所 | Double-circuit redundant power supply automatic switching and recovery method |
-
2019
- 2019-12-20 CN CN201922301217.7U patent/CN211183522U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112615419A (en) * | 2020-12-18 | 2021-04-06 | 上海微阱电子科技有限公司 | Dual-power automatic switching circuit |
| CN112615419B (en) * | 2020-12-18 | 2024-02-27 | 上海微阱电子科技有限公司 | Dual-power automatic switching circuit |
| CN114069829A (en) * | 2021-11-22 | 2022-02-18 | 北京计算机技术及应用研究所 | Double-circuit redundant power supply auto-switch and recovery circuit |
| CN114123466A (en) * | 2021-11-22 | 2022-03-01 | 北京计算机技术及应用研究所 | Double-circuit redundant power supply automatic switching and recovery method |
| CN114123466B (en) * | 2021-11-22 | 2023-09-26 | 北京计算机技术及应用研究所 | Dual-path redundant power supply self-cutting and recovering method |
| CN114069829B (en) * | 2021-11-22 | 2023-09-26 | 北京计算机技术及应用研究所 | Dual-path redundant power supply self-cutting and recovering circuit |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20200804 |