CN220234480U - Control circuit for switching single power supply and double power supplies - Google Patents
Control circuit for switching single power supply and double power supplies Download PDFInfo
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- CN220234480U CN220234480U CN202321871159.1U CN202321871159U CN220234480U CN 220234480 U CN220234480 U CN 220234480U CN 202321871159 U CN202321871159 U CN 202321871159U CN 220234480 U CN220234480 U CN 220234480U
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- 238000004891 communication Methods 0.000 claims abstract description 39
- 230000009977 dual effect Effects 0.000 claims abstract description 32
- 238000001514 detection method Methods 0.000 claims abstract description 22
- 238000004146 energy storage Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 239000003990 capacitor Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Classifications
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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
Disclosed is a control circuit for switching between single and double power supplies, which is used for switching between power supply modes of communication equipment and switching between double power supply and single power supply, and comprises: a power-down detection chip for detecting a dual power state; the switching circuit is used for connecting the dual power supply with a main board of the communication equipment; the processor is connected with the switch circuit and the power failure detection chip and controls the switch circuit to switch the power supply mode according to the state of the dual power supply; and the energy storage circuit supplies power to the main board in the power supply mode switching process.
Description
Technical Field
The utility model relates to a control circuit for switching single power supply and double power supplies.
Background
In the communications industry, power supplies are an integral part of the operation of devices. In recent years, the requirements of operator type selection on low power consumption of communication products and reliability of equipment are higher and higher, and power consumption parameters and dual-power backup capable of improving operation reliability of equipment become important indexes of a type selection test scoring standard.
The dual power supply for 1+1 backup can improve the reliability of the communication equipment, and becomes an increasingly choice of communication products. Fig. 1 is a block diagram of a prior art single/dual power control circuit. When one of the power supplies is damaged, the equipment can still work, the owners cannot be affected, and the reliability of the equipment in operation is improved. However, when the dual ac power source supports backup, current sharing is performed due to the loaded characteristic of the ac power source, resulting in lower efficiency when the dual power source supplies power than when the single power source works. The utility model aims to solve the problem of low power conversion efficiency during dual-power backup operation.
Disclosure of Invention
The utility model provides a control circuit for switching between a single power supply and a double power supply, which can automatically switch the power supply of the double power supply into the power supply of the single power supply, and solves the problem that the efficiency of the power supply of the double power supply is lower than that of the single power supply.
According to an aspect of the embodiments of the present utility model, there is provided a control circuit for switching between single and dual power supplies, for switching between power supply modes of a communication device, and switching between dual power supply to single power supply, the control circuit including: a power-down detection chip for detecting a dual power state; the switching circuit is used for connecting the dual power supply with a main board of the communication equipment; and the processor is connected with the switch circuit and the power failure detection chip and controls the switch circuit to switch the power supply mode according to the state of the dual power supply.
In some examples, the power mode includes: the dual power supply performs balanced power supply in the starting stage of the communication equipment; after the communication equipment is started, a first power supply in the dual power supplies power, and a second power supply is used as a backup and is in a standby power supply state; and when the first power supply fails in the operation of the communication equipment, switching to the second power supply to supply power.
In some examples, the motherboard is powered with a tank circuit during the power mode switching.
In some examples, the processor is connected to a communication module of the communication device, and when the communication module obtains a command sent by the owner to switch the power supply mode, the processor controls the switch circuit to switch the power supply mode according to the command.
In some examples, the communication module transmits the status of the dual power source to a homeowner.
In some examples, the switching circuit includes: the first switch circuit is used for connecting the first power supply with the main board; and the second switch circuit is used for connecting the second power supply with the main board, and the processor is connected with the first switch circuit and the second switch circuit.
IN some examples, the first and second switching circuits each include a driver, a FET controller, and a MOSFET, the GPIO of the processor is connected to an output enable end OE of the driver, an output end Y of the driver is connected to an OFF end of the FET controller, a GATE end of the FET controller is connected to a G end of the MOSFET, the first and second power supplies are connected to an IN end of the FET controller and an S end of the MOSFET IN the first and second switching circuits, respectively, and an OUT end of the FET controller and a D end of the MOSFET are connected as outputs to the motherboard.
The beneficial effects are that: the conversion efficiency of the power supply during dual-power backup operation can be effectively improved, the reliability of the equipment is improved, the working efficiency of the power supply of the equipment is not required to be reduced, and the power consumption of the equipment is increased; the working state of the power supply can be effectively obtained, and even the on-board power supply can be detected.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present utility model, the following description will briefly explain the drawings of the embodiments.
Fig. 1 is a block diagram of a prior art single/dual power control circuit.
Fig. 2 is a block diagram of a control circuit for single and dual power switching according to an embodiment of the present utility model.
Fig. 3 is a control circuit topology for single and dual power switching in accordance with an embodiment of the present utility model.
Detailed Description
The term "communication device" of the present utility model includes, but is not limited to, a cassette switch, other similar cassette communication products. The control circuit for switching the single power supply and the double power supplies is applied to the communication equipment and realizes the switching between the two power supplies.
As shown in fig. 2, the control circuit for switching between single and double power supplies comprises a processor (CPU), a power-down detection chip for detecting the states of the two power supplies, a first switch circuit and a second switch circuit, wherein a first power supply of the two power supplies is connected with a main board of the communication equipment through the first switch circuit to supply power to the main board of the communication equipment, a second power supply of the two power supplies is connected with the main board of the communication equipment through the second switch circuit to supply power to the main board of the communication equipment, the power-down detection chip, the first switch circuit and the second switch circuit are connected with the processor, and the processor controls the on-off of the first switch circuit and the second switch circuit according to the detection of the power-down detection chip on the working states of the double power supplies to realize the switching of the power supply of the single and the double power supplies.
The utility model defaults to a power supply. When the power failure detection chip detects that one power supply which is being supplied is abnormally powered down, the CPU is matched with the switching circuit to switch to the other power supply for supplying power, so that the power consumption is saved, and the working efficiency of the power supply is improved. In the abnormal power failure switching process of the power supply, the service is not interrupted in the switching process by supplying power to the energy storage circuit for a short time.
As shown IN fig. 3, the first switching circuit and the second switching circuit each include a driver, an FET controller and a MOSFET, the GPIO of the CPU is connected to the output enable end OE of the driver, the output end Y of the driver is connected to the OFF end of the FET controller, the GATE end of the FET controller is connected to the G end of the MOSFET, the power supply is connected to the IN end of the FET controller and the S end of the MOSFET, and the OUT end of the FET controller and the D end of the MOSFET are connected as outputs to the main board of the communication device to supply power thereto. The driver may be 74LVC1G125, the FET controller may be LM5050MK-2/NOPB OR controller, the MOSFET may be FDMC86520L, and the utility model is not limited to the specific type of these devices.
When the equipment normally operates, the utility model can also utilize the communication module of the communication equipment to acquire the power supply switching command sent by the owner, and the CPU cooperates with the switching circuit to switch the power supply according to the command. The communication module can also send the working state of the power supply to the owner, so that the owner can grasp the state of the power supply in real time. The communication module may be a serial server, a gateway, but is not limited thereto. It can be seen that the utility model supports the automatic switching of single power supply and double power supply when the power supply command switching and the backup function are met, and is convenient and flexible.
The power state detection, power switching and tank circuits are described in detail below.
(1) Power state detection
a. The first power-down detection chip and the second power-down detection chip detect two power-down working states (in this embodiment, it is assumed that the output of the two power supplies 12V is normal), and transmit two power-down working state signals to the GPIO of the CPU, respectively, and the CPU can obtain the power-down working state by reading the state of the GPIO. The power failure detection chip is a voltage monitoring chip, and the power supply voltage state is monitored by the conventional technology.
b. The output states of the two power supplies are normal, the first power supply is used for supplying power by default, and the second power supply is used for backup.
c. One power supply has normal output state, the other power supply has abnormal state, and the equipment is powered by adopting the power supply with normal output through automatic detection after being started.
Table 1: first power state detection
Table 2: second power state detection
In tables 1 and 2, GPIO3 and GPIO4 are two GPIO ports of the CPU. The first power supply power-down detection chip and the second power supply power-down detection chip detect two power supply working states, the two power supply working state signals are respectively transmitted to the GPIO4 and the GPIO3, and the CPU reads the signals of the GPIO4 and the GPIO3 and judges the states of the two power supplies according to the table 1 and the table 2.
(2) The CPU cooperates with the switching circuit to control the switching of the first power supply and the second power supply
a. The device start-up phase is default to power both power supplies (mode four in table 3), and automatically adjusts to power supply of one power supply after start-up, and the other power supply is in a state to be started as a backup.
b. The equipment is electrified, and the CPU is matched with the power-down detection chip to detect the power-on state of the power supplies, and if only one of the power supplies is electrified, the CPU can default to adopt the electrified power supply to supply power.
c. After the device is successfully started, the owner can manually switch the four modes in the table 3 through the serial port, wherein the mode one does not suggest use.
Table 3: power mode of device
In table 3, GPIO1 and GPIO2 are two GPIO ports of the CPU, the GPIO1 and GPIO2 are respectively connected to the output enable ends OE of the drivers of the first switch circuit and the second switch circuit, and output levels pwr_ctrl_1 (power_ctrl_1) and pwr_ctrl_2 (power_ctrl_2) respectively according to the Power states to switch the Power supply modes. In addition, the output of the GPIO1 and the GPIO2 can be controlled through the serial port command of the communication equipment, so that the switching of the single power supply and the dual power supply is completed.
3) Energy storage circuit
The conventional electrolytic capacitors are adopted to store energy, the size of the capacitors is determined according to the power consumption of the operation of the equipment, and the power consumption of the common box-type communication equipment is not more than 100W, so that two 2200uf electrolytic capacitors are adopted, and the power consumption can be properly adjusted according to the power consumption (the smaller the power consumption of the equipment is, the smaller the energy storage is needed).
In summary, the steps and logic of the single/double power supply switching control are as follows: 1) When the equipment is started, the two power supplies are normal and supply power in an equalizing way, and each power supply accounts for about 50% of the power supply of the equipment; 2) After the equipment is started, the first power supply is set by default, and the second power supply is used as a backup and is in a waiting power supply state; 3) The first power supply which works by default in the running process of the equipment fails, the energy storage circuit plays a role after the first power supply is powered down, the CPU is supported to complete the switching action, taking as an example in fig. 2 and 3, the GPIO4 of the CPU receives the power down signal and immediately switches to the second power supply to supply power in time through the output high level of the GPIO2 (the completion time of the action is in the ms level), the switching of the power supply is completed on the premise of not affecting the service, and the backup function of the power supply is realized.
It should be noted that the circuit related to the processor necessarily contains a program, but the improvement of the present utility model is a circuit for switching the power supply mode of the communication device (switching the dual power supply to the single power supply), wherein the program is a simple program, and a person skilled in the art can easily know how to implement the control program according to the circuit structure without any inventive effort.
Claims (7)
1. A control circuit for single and dual power switching for switching a power supply mode of a communication device, the control circuit comprising: a power-down detection chip for detecting a dual power state; the switching circuit is used for connecting the dual power supply with a main board of the communication equipment; and the processor is connected with the switch circuit and the power failure detection chip and controls the switch circuit to switch the power supply mode according to the state of the dual power supply.
2. The single dual power switching control circuit of claim 1, wherein the power mode comprises: the dual power supply performs balanced power supply in the starting stage of the communication equipment; after the communication equipment is started, a first power supply in the dual power supplies power, and a second power supply is used as a backup and is in a standby power supply state; and when the first power supply fails in the operation of the communication equipment, switching to the second power supply to supply power.
3. The single and dual power switching control circuit of claim 2, wherein the main board is powered by a tank circuit during the power mode switching.
4. A single or dual power supply switching control circuit according to claim 2 or claim 3, wherein the processor is connected to a communication module of the communication device, and when the communication module obtains a command for switching the power supply mode sent by the owner, the processor controls the switching circuit to switch the power supply mode according to the command.
5. The single and dual power switching control circuit of claim 4, wherein the communication module transmits the status of the dual power to a homeowner.
6. The single dual power switching control circuit of claim 2, wherein the switching circuit comprises: the first switch circuit is used for connecting the first power supply with the main board; and the second switch circuit is used for connecting the second power supply with the main board, and the processor is connected with the first switch circuit and the second switch circuit.
7. The control circuit for switching between single and double power supplies according to claim 6, wherein the first and second switching circuits each include a driver, an FET controller, and a MOSFET, the GPIO of the processor is connected to an output enable terminal OE of the driver, an output terminal Y of the driver is connected to an OFF terminal of the FET controller, a GATE terminal of the FET controller is connected to a G terminal of the MOSFET, the first and second power supplies are connected to an IN terminal of the FET controller and an S terminal of the MOSFET IN the first and second switching circuits, respectively, and an OUT terminal of the FET controller and a D terminal of the MOSFET are connected as outputs to the main board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321871159.1U CN220234480U (en) | 2023-07-14 | 2023-07-14 | Control circuit for switching single power supply and double power supplies |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321871159.1U CN220234480U (en) | 2023-07-14 | 2023-07-14 | Control circuit for switching single power supply and double power supplies |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220234480U true CN220234480U (en) | 2023-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321871159.1U Active CN220234480U (en) | 2023-07-14 | 2023-07-14 | Control circuit for switching single power supply and double power supplies |
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| Country | Link |
|---|---|
| CN (1) | CN220234480U (en) |
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2023
- 2023-07-14 CN CN202321871159.1U patent/CN220234480U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240711 Address after: 430000 No. 6, High-tech Fourth Road, Donghu High-tech Development Zone, Wuhan City, Hubei Province Patentee after: FIBERHOME TELECOMMUNICATION TECHNOLOGIES Co.,Ltd. Country or region after: China Patentee after: Wuhan Changjiang Computing Technology Co.,Ltd. Address before: 430205 No. 6, Gaoxin 4th Road, East Lake High Tech Development Zone, Wuhan, Hubei Province Patentee before: FIBERHOME TELECOMMUNICATION TECHNOLOGIES Co.,Ltd. Country or region before: China |
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| TR01 | Transfer of patent right |