WO2024255230A1 - 掉电保持电路、供电保护方法、供电控制电路及装置 - Google Patents
掉电保持电路、供电保护方法、供电控制电路及装置 Download PDFInfo
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- WO2024255230A1 WO2024255230A1 PCT/CN2024/071735 CN2024071735W WO2024255230A1 WO 2024255230 A1 WO2024255230 A1 WO 2024255230A1 CN 2024071735 W CN2024071735 W CN 2024071735W WO 2024255230 A1 WO2024255230 A1 WO 2024255230A1
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- capacitor
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/20—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/28—Supervision thereof, e.g. detecting power-supply failure by out of limits supervision
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/30—Means for acting in the event of power-supply failure or interruption, e.g. power-supply fluctuations
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering using capacitors as storage or buffering devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
- H02J7/855—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; 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
- H02J9/061—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 for DC powered loads
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
- H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
- H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Details of circuit arrangements for charging or discharging batteries or supplying loads from batteries
- H02J2207/50—Charging of capacitors, supercapacitors, ultra-capacitors or double layer capacitors
-
- 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
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Definitions
- the present application relates to a power-off holding circuit, a power supply protection method, a power supply control circuit and a device.
- servers have higher and higher requirements for continuous power supply stability.
- the system needs to quickly report and store the system operation status and abnormal network voltage within the power-off retention time, and switch to the backup power supply mode. Therefore, it is necessary to set a power-off retention circuit in the power supply system of the server to ensure that the server has a power-off retention time.
- a large-capacitance electrolytic capacitor is connected in parallel to the input end of the DC switching power supply of the server, so that when the input voltage of the server drops abnormally or fails, the large-capacitance electrolytic capacitor can be used to power the server, thereby meeting the power-off retention time requirement of the server.
- a power-off holding circuit includes:
- a first energy storage circuit includes a plurality of capacitors connected in parallel, the plurality of capacitors being used to store energy according to an input bus voltage of the server and to reversely supply power to the server;
- the second energy storage circuit includes an inductor and a first switch tube, which are sequentially connected in series between the positive electrode of the input bus and the negative electrode of the input bus, and the inductor is used for energy storage to boost the voltage to a target voltage;
- the third energy storage circuit includes a second switch tube and an energy storage capacitor.
- the second switch tube and the energy storage capacitor are connected in series between the inductor and the negative pole of the input bus.
- the inductor is used to charge the energy storage capacitor, and the energy storage capacitor reversely supplies power to the server.
- a power supply protection method is provided, which is applied to the power-off holding circuit of the first aspect or any corresponding embodiment thereof, and the method includes:
- the server When the voltage on the input bus is less than or equal to the first voltage threshold, the server is reversely powered based on the first voltage in the multiple capacitors in the first energy storage circuit, and/or the second voltage in the energy storage capacitor in the third energy storage circuit is reversely powered for the server.
- a power supply control circuit is provided, the power supply control circuit is used to control a power-off holding circuit to reversely supply power to a server, the power-off holding circuit is a power-off holding circuit of the first aspect or any corresponding embodiment thereof, and the power supply control circuit includes:
- the first driving circuit includes a first power supply, a first switching switch, a second switching switch, a first control driving unit of a third switch tube, a first delay unit, and a second control driving unit of the second switch tube.
- the first power supply, the first switching switch, the second switching switch, the first delay unit, and the second control driving unit are connected in series in sequence.
- the first control driving unit is connected between the second switching switch and the first delay unit.
- the first power supply is used to power the first driving circuit.
- the first control driving unit is used to control the third switch tube to be in an on state or an off state.
- the second control driving unit The driving unit is used to control the second switch tube to be in a conducting state;
- An input voltage detection unit connected to the input bus, and used to detect the voltage on the input bus
- an input voltage judgment unit wherein a first end of the input voltage judgment unit is connected to the input voltage detection unit, and a second end of the input voltage judgment unit is connected to the second switch, and the input voltage judgment unit is used to compare the first voltage in the plurality of capacitors in the first energy storage circuit with a first voltage threshold, and to control the second switch to be in an on state or in an off state according to a first comparison result, wherein the first comparison result is a comparison result between the first voltage and the first voltage threshold;
- a capacitor voltage detection unit is connected to the energy storage capacitor in the third energy storage circuit, and the capacitor voltage detection unit is used to detect the second voltage in the energy storage capacitor;
- a capacitor voltage judgment unit wherein the first end of the capacitor voltage judgment unit is connected to the capacitor voltage detection unit, and the second end of the capacitor voltage judgment unit is connected to the second switching switch.
- the capacitor voltage judgment unit is used to compare the second voltage with the second voltage threshold, and to control the first switching switch to be in an on state or to control the first switching switch to be in an off state according to the second comparison result; the second comparison result is a comparison result between the second voltage and the second voltage threshold.
- a power supply protection device comprising:
- a detection module used to detect the voltage signal on the server input bus
- a control module is used to reversely power the server based on a first voltage in multiple capacitors in a first energy storage circuit and/or a second voltage in an energy storage capacitor in a third energy storage circuit when the voltage on the input bus is less than or equal to a first voltage threshold.
- a server comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, computer instructions being stored in the memory, and the processor executing the power supply protection method of the above-mentioned second aspect or any corresponding embodiment thereof by executing the computer instructions.
- a non-volatile computer-readable storage medium on which computer instructions are stored, and the computer instructions are used to enable a computer to execute the power supply protection method of the above-mentioned second aspect or any corresponding embodiment thereof.
- FIG1 is a schematic structural diagram of a power-off holding circuit according to an embodiment of the present application.
- FIG2 is a schematic structural diagram of another power-off holding circuit according to an embodiment of the present application.
- FIG3 is a schematic structural diagram of another power-off holding circuit according to an embodiment of the present application.
- FIG4 is a schematic structural diagram of another power-off holding circuit according to an embodiment of the present application.
- FIG5 is a schematic diagram of a flow chart of a power supply protection method according to an embodiment of the present application.
- FIG6 is a flow chart of another power supply protection method according to an embodiment of the present application.
- FIG7 is a schematic diagram of the structure of a power supply control circuit according to an embodiment of the present application.
- FIG8 is a schematic diagram of the structure of another power supply control circuit according to an embodiment of the present application.
- FIG9 is a timing diagram of reverse power supply for a server according to an embodiment of the present application.
- FIG10 is a power supply protection device according to an embodiment of the present application.
- FIG11 is a schematic diagram of the hardware structure of a server according to an embodiment of the present application.
- FIG. 12 is a schematic diagram of the structure of a non-volatile computer-readable storage medium according to an embodiment of the present application.
- a large-capacitance electrolytic capacitor is connected in parallel to the input end of the DC switching power supply of the server, so that when the server input voltage drops abnormally or fails, the large-capacitance electrolytic capacitor can be used to power the server, thereby meeting the power-off retention time requirement of the server.
- the size of this type of capacitor is too large, usually about 1/4 of the overall volume of the server power supply, and as the output power increases, it will reach 1/3 to meet the necessary needs, which has seriously restricted the development of high-efficiency and high-power density server power supplies.
- the server input voltage drops abnormally or fails, the voltage difference between the internal voltage of the server and the voltage released by the large-capacitance electrolytic capacitor is too large, which will cause a large input surge current to the server, thus affecting the safety of the server.
- a power-off holding circuit including: a first energy storage circuit, including multiple capacitors connected in parallel, the multiple capacitors are used to store energy according to the input bus voltage of the server, and to reversely power the server; a second energy storage circuit, including an inductor and a first switch tube, the inductor and the first switch tube are sequentially connected in series between the positive pole of the input bus and the negative pole of the input bus, and the inductor is used to store energy to boost the voltage to the target voltage; a third energy storage circuit, including a second switch tube and an energy storage capacitor, the second switch tube and the energy storage capacitor are sequentially connected in series between the inductor and the negative pole of the input bus, the inductor is used to charge the energy storage capacitor, and the energy storage capacitor reversely powers the server.
- the power-off holding circuit provided by the present application, energy can be stored according to the voltage of the server input bus through multiple energy storage circuits, and then when the server input voltage drops abnormally or fails, the input bus fluctuating voltage can be smoothed, thereby meeting the need to provide the server with a power-off holding time while ensuring the safety of the server.
- This embodiment provides a power-off holding circuit, as shown in FIG1 , comprising: a first energy storage circuit 10 , a second energy storage circuit 20 and a third energy storage circuit 30 .
- the first energy storage circuit 10 includes a plurality of capacitors 11 connected in parallel.
- a plurality of capacitors 11 are connected in parallel to form a first energy storage circuit 10, so that the plurality of capacitors 11 can be used to store energy according to the input bus voltage of the server, and when the input voltage on the bus drops abnormally or fails, the server can be reversely powered.
- the use of multiple capacitors 11 connected in parallel helps to smooth the bus voltage fluctuations when the voltage on the input bus drops abnormally or fails, thereby helping to ensure the safety of the server.
- the second energy storage circuit 20 includes an inductor L1 and a first switch tube Q3 , and the inductor L1 and the first switch tube Q3 are sequentially connected in series between the positive electrode of the input bus and the negative electrode of the input bus.
- the second energy storage circuit 20 can be understood as a boost circuit.
- the inductor L1 can boost the voltage flowing into the input bus to the target voltage, so that the third energy storage circuit 30 can store high-voltage electric energy in advance when the voltage of the input bus is in a normal state, and then provide the server with sufficient power-off holding time when powering the server later.
- the inductor L1 can be understood as a boost inductor with low power demand and low design difficulty.
- the design value of its inductance takes into account the current limiting characteristic requirements, and can achieve a short-term current limiting function during power-off retention.
- the surge current caused on the input bus can be suppressed, thereby helping to enhance the reliability of the power-off retention circuit.
- the second energy storage circuit 20 is arranged in the power-off holding circuit instead of being placed on the main power branch of the server, which can reduce the power consumption of the first
- the power required by the second energy storage circuit 20 can enhance the reliability of the power-off holding circuit while helping to reduce the volume occupied by the second energy storage circuit 20.
- the third energy storage circuit 30 includes a second switch tube Q4 and an energy storage capacitor C3.
- the second switch tube Q4 and the energy storage capacitor C3 are sequentially connected in series between the inductor L1 and the negative electrode of the input bus.
- the inductor L1 is used to charge the energy storage capacitor C3.
- the third energy storage circuit 30 is used to store high-voltage electric energy and to reversely supply power to the server when the input voltage on the bus line drops abnormally or fails. Since the capacitor energy storage satisfies the following energy formula: Therefore, when the energy storage capacitor C3 uses the target voltage to store energy, the stored energy will be higher than the energy required by the server, and when the voltage on the input bus drops abnormally or fails, it can provide the required energy supply for the server, thereby helping to provide the server with sufficient power-off retention time.
- the power-off holding circuit provided in this embodiment can store energy according to the voltage of the server input bus through multiple energy storage circuits when the server input voltage is in a normal state, and can also reversely supply power to the server through the first energy storage circuit and/or the second energy storage circuit when the server input voltage drops abnormally or fails, thereby effectively reducing the surge current on the input bus. It can meet the demand of providing power-off holding time for the server while ensuring the safety of the server. It also occupies a small volume, which helps to ensure the development of high efficiency and high power density of server power supplies.
- a plurality of capacitors 11 include a first capacitor C1 and a second capacitor C2 connected in parallel with the first capacitor C1; the first energy storage circuit 10 also includes: a third switch tube Q1 and a diode D1. The first capacitor, the second capacitor and the third switch tube Q1 are connected in series between the positive electrode of the input bus and the negative electrode of the input bus in sequence.
- the source of the third switch tube Q1 can be connected to the output ends of the plurality of capacitors 11 (the first capacitor C1 and the second capacitor C2), and the drain of the third switch tube Q1 can be connected to the negative electrode of the input bus; the drain of the third switch tube Q1 can also be connected to the output ends of the plurality of capacitors 11 (the first capacitor C1 and the second capacitor C2), and the source of the third switch tube Q1 can be connected to the negative electrode of the input bus.
- the specific series connection method depends on the use requirements and is not limited in this application.
- Diode D1 the positive electrode of diode D1 is connected to the negative electrode of the input bus.
- the second capacitor C2 is connected in series between the positive electrode of the input bus and the negative electrode of diode D1.
- the charging or discharging state of multiple capacitors 11 can be controlled by the third switch tube Q1, and then the multiple capacitors 11 can be targetedly controlled according to the voltage state of the input bus.
- the diode D1 it can be ensured that when the first energy storage circuit 10 supplies power to the server through the input bus, the multiple capacitors 11 are always in a discharging state, thereby avoiding the occurrence of reverse power supply, which helps to extend the power-off holding time.
- the first capacitor C1 and the second capacitor C2 are used to store energy according to the input bus voltage of the server when the third switch tube Q1 is in the on state; the first capacitor C1 and the second capacitor C2 are also used to reverse power the server when the third switch tube Q1 is in the off state and the diode D1 is in the unidirectional conduction state.
- the first energy storage circuit 10 is connected in series between the positive electrode of the input bus and the negative electrode of the input bus, thereby being able to store energy according to the input bus voltage of the server. Further, in the process of the input bus continuously supplying power to the first capacitor C1 and the second capacitor C2, when the first capacitor C1 and the second capacitor C2 are in a saturated state, the voltage of the input bus can be equivalent, thereby being able to supply power to the inductor L1 or the energy storage capacitor C3.
- the plurality of capacitors 11 are in a discharge state and can provide reverse power to the server to maintain the power demand on the server load side.
- the energy and time of the surge current on the input bus can be greatly reduced when the power supply circuit is switched to the first energy storage circuit to reversely power the server, thereby solving the problem that the energy storage capacitor C3 cannot be directly switched in parallel to the input bus.
- the first energy storage circuit 10 has a diode D1
- the discharge path can be kept in existence, which can reduce the time requirement for the energy storage capacitor C3 to be instantly switched in, thereby helping to ensure the reliability of the switching state judgment.
- the diode D1 is also used to provide sufficient input load holding energy during the power-off switching process.
- the first switch tube Q3 and the second switch tube Q4 are alternately turned on according to a specified duty cycle, so that the inductor L1 charges the energy storage capacitor C3.
- a single specified duty cycle includes a first duty cycle and a second duty cycle, and the execution period of the first duty cycle is earlier than the execution period of the second duty cycle.
- the first duty cycle is used to control whether the first switch tube Q3 is in the on state
- the second duty cycle is used to control whether the second switch tube Q4 is in the on state.
- the energy storage capacitor C3 Since the target voltage of the energy storage capacitor C3 is provided by the inductor L1, and when the first switch tube Q3 and the second switch tube Q4 are in the on state at the same time, the energy storage capacitor C3 will be short-circuited. Therefore, in order to ensure that the inductor L1 can charge the energy storage capacitor C3 with the target voltage through the second switch tube Q4, the first switch tube Q3 and the second switch tube Q4 are controlled to be alternately turned on, so as to utilize the characteristics of the large internal resistance and slow self-discharge of the energy storage capacitor, and control the second energy storage circuit 20 to enter the standby off self-discharge state for a long time, thereby reducing the overall light-load power consumption of the power supply, and at the same time reducing the electromagnetic interference problem of the power supply caused by the addition of high-frequency circuits.
- the alternating frequency of the first switch tube Q3 and the second switch tube Q4 can be in the range of 300kHZ to 500kHz, thereby reducing the inductance requirement of the inductor L1, and facilitating the integrated design with the inductance required for inductor current limiting.
- the second energy storage circuit is integrated with the energy storage capacitor to minimize the number of power devices used, thereby further improving the power density of the power supply.
- the power-off holding circuit further includes: a current limiting resistor R1 and a fourth switch tube Q2; one end of the current limiting resistor R1 is arranged between the second switch tube Q4 and the energy storage capacitor C3; and the fourth switch tube Q2 is connected in series between the other end of the current limiting resistor R1 and the negative electrode of the diode D1.
- the energy storage capacitor C3 can be connected in series with the first capacitor, the second capacitor and the second capacitor C2 based on the current limiting resistor R1 and the fourth switch tube 50 to increase the power supply voltage of the power-off holding circuit for supplying power to the server through the input bus (for example: after the energy storage capacitor C3 is connected in series with the first capacitor, the second capacitor and the second capacitor C2, the voltage output by the power-off circuit can be increased by about two times), thereby ensuring that the electric energy stored in the first capacitor, the second capacitor, the second capacitor C2 and the energy storage capacitor C3 is fully utilized, which helps to shorten the power supply switching time, thereby effectively extending the power-off holding time to ensure that the server can operate stably.
- the energy storage capacitor C3 is connected in parallel with multiple capacitors 11 to reverse power the server to extend the power-off retention time provided to the server.
- the fourth switch tube Q2 When the first switch tube Q3, the second switch tube Q4 and the third switch tube Q1 are all in the off state, the fourth switch tube Q2 is in the on state and the diode D1 is in the unidirectional conduction state, the energy storage capacitor C3 is connected in series with the multiple capacitors 11 to reversely supply power to the server, so as to maximize the use of the electric energy in the multiple capacitors 11 and the energy storage capacitor C3, and extend the duration of the power-off retention time provided to the server.
- the energy storage capacitor C3 is connected in series with the multiple capacitors 11 to release energy, in the process of switching the power supply circuit of the server to the power-off retention circuit to power the server, by cutting off the large capacitor on the input bus, it is ensured that there is no large-capacitance energy storage capacitor on the input bus branch, and then when the power supply circuit is switched, the surge energy on the input bus is small and the existence time is short, and the current limiting resistor R1 also has a current limiting function, so that the safety of reverse power supply to the server can be effectively guaranteed.
- the inductor L1 is an energy storage current limiting coil
- the second energy storage circuit 20 also includes: a magnetic excitation saturation control module 40, a magnetic excitation saturation coil L2 and a magnetic core 21; the energy storage current limiting coil L1, the magnetic core 21 and the magnetic excitation saturation coil L2 constitute a coupled inductor; the magnetic excitation saturation control module 40 is used to control the current in the magnetic excitation saturation coil L2, and the current is used to control the energy storage current limiting coil L1 to be in a current limiting state or to control the energy storage current limiting coil to be in a saturated state.
- the design difficulty is low, not only can the energy storage current limiting coil L1 have a short-term current limiting function when the power is off, but also the surge current generated on the input bus when the energy storage capacitor C3 is switched to the main power path can be suppressed.
- the energy storage current limiting coil L1 when the second switch tube Q4 is in the on state and the third switch tube Q1 is in the off state, the energy storage current limiting coil L1 is used to charge the energy storage capacitor C3 in the current limiting state; when the second switch tube Q4 is in the on state, the third switch tube Q1 is in the off state and the diode D1 is in the unidirectional conduction state, the energy storage capacitor C3 is used to reversely supply power to the server when the energy storage current limiting coil L1 is in the saturation state.
- the self-discharge rate of the energy storage capacitor C3 is slow, it is possible to control whether the energy storage current limiting coil L1 is in the inductance saturation state and whether the energy storage capacitor C3 is in the self-discharge state, thereby reducing the inductance requirement of the inductor L1, and facilitating the integrated design of the inductance required for the current limiting of the inductor L1; at the same time, entering the off self-discharge state for a long time can realize that the second energy storage circuit reduces the overall light-load power consumption of the power supply, and reduces the electromagnetic interference problem of the power supply caused by adding high-frequency circuits, thereby helping to enhance the stability of the server.
- the energy storage limit is triggered by controlling the current of the excitation saturation coil L2.
- the flow coil L1 is in a saturated state, and the energy storage capacitor C3 can also be completely connected in parallel to the input bus path.
- the current in the capacitor on the input bus can release energy by flowing through the diode D1, thereby providing power supply maintenance service for the server.
- the power-off holding circuit provided in the present application can not only store energy when the voltage of the input bus is in a normal state, but also provide the necessary power-off holding time for the server when the input voltage drops abnormally or a failure occurs, assist the server in reporting the fault and storing necessary information, and be able to switch to the backup power supply in time, thereby being more applicable and reliable.
- the present application also provides a power supply protection method, which is applied to any power-off holding circuit provided in the present application, including: detecting the voltage on the input bus of the server; when the voltage on the input bus is less than or equal to the first voltage threshold, the server is reversely powered based on the first voltage in the multiple capacitors in the first energy storage circuit, and/or the server is reversely powered by the second voltage in the energy storage capacitor in the third energy storage circuit.
- the power supply protection method provided by the present application can smooth the input bus fluctuation voltage when the voltage on the server input bus drops abnormally or fails, and provide the server with the power-off holding time requirement while ensuring the safety of the server.
- an embodiment of a power supply protection method is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.
- a power supply protection method is provided.
- the execution subject may be a server or a baseboard management controller (BMC) deployed inside the server.
- BMC baseboard management controller
- FIG5 is a flow chart of the power supply protection method according to the embodiment of the present application. As shown in FIG5, the process includes the following steps:
- Step S501 detecting the voltage on the server input bus.
- the purpose of detecting the voltage on the input bus is to determine whether the current voltage on the input bus is normal and whether it can supply power to the server normally.
- Step S502 when the voltage on the input bus is less than or equal to the first voltage threshold, the server is reversely powered based on the first voltage in the multiple capacitors in the first energy storage circuit, and/or the second voltage in the energy storage capacitor in the third energy storage circuit is reversely powered for the server.
- the first voltage threshold can be understood as a warning voltage, that is, the minimum voltage value to maintain the normal operation of the server. If the voltage on the input bus is less than or equal to the first voltage threshold, it indicates that the voltage on the server input bus is abnormal, or there is a drop. Therefore, in order to ensure that the server can switch the power supply circuit in time, the server is reversely powered based on the first voltage in the multiple capacitors in the first energy storage circuit, and/or the second voltage in the energy storage capacitor in the third energy storage circuit is reversely powered for the server to provide the server with a power-off retention time.
- the power supply protection method provided in this embodiment can smooth the fluctuating voltage of the input bus when the input voltage of the server drops abnormally or fails, thereby providing the server with the power-off holding time requirement and ensuring the safety of the server.
- multiple capacitors include a first capacitor and a second capacitor connected in parallel with the first capacitor; the first energy storage circuit also includes: a third switching tube and a diode; the first capacitor and the third switching tube are connected in series between the positive pole of the input bus and the negative pole of the input bus in sequence; a diode, the positive pole of the diode is connected to the negative pole of the input bus; the second capacitor is connected in series between the positive pole of the input bus and the negative pole of the diode.
- the process of reverse powering the server based on the first voltage in multiple capacitors in the first energy storage circuit can be as follows: when the voltage on the input bus is equal to the first voltage threshold, and the second voltage in the energy storage capacitor is equal to the second voltage threshold, the third switch tube is controlled to be in an off state, so as to reverse power the server based on the first voltage in the first capacitor and the second capacitor when the diode is in a unidirectional conduction state.
- the third switch tube is controlled to be in an off state, so that when the diode is in a unidirectional conduction state, the server is reversely powered based on the first voltage in the first capacitor and the second capacitor to smooth the voltage on the input bus, thereby ensuring that the load power supply of the server is normal.
- the process of reverse powering the server based on the first voltage in the plurality of capacitors in the first energy storage circuit and the second voltage in the energy storage capacitor in the third energy storage circuit can be as follows: When the voltage on the line is less than the first voltage threshold, the voltage on the input bus is greater than the third voltage threshold, and the second voltage is equal to the second voltage threshold, the third switch tube is controlled to be in the disconnected state for a first period of time, and the second switch tube in the third energy storage circuit is controlled to be in the on state. When the first switch tube in the second energy storage circuit is in the disconnected state and the diode is in the unidirectional conduction state, multiple capacitors are controlled to be connected in parallel with the energy storage capacitor, and the server is reversely powered by the first voltage and the second voltage.
- the third voltage threshold can be understood as the minimum voltage value when multiple capacitors are in an undervoltage state.
- the voltage on the input bus is less than the first voltage threshold, the voltage on the input bus is greater than the third voltage threshold, and the second voltage is equal to the second voltage threshold, it indicates that the voltage on the input bus is gradually decreasing, but the first voltage in the multiple capacitors has not yet reached the undervoltage state.
- the third switch tube is controlled to be in the disconnected state for a first duration, and the second switch tube in the third energy storage circuit is controlled to be in the on state, and when the first switch tube in the second energy storage circuit is in the disconnected state and the diode is in the unidirectional conduction state, the first voltage and the second voltage are used to reverse power the server.
- multiple capacitors and energy storage capacitors are connected in parallel.
- the power-off holding circuit also includes: a current limiting resistor and a fourth switch tube; one end of the current limiting resistor is arranged between the second switch tube and the energy storage capacitor; the fourth switch tube is connected in series between the other end of the current limiting resistor and the negative electrode of the diode.
- the process of reversely powering the server based on the first voltage in the plurality of capacitors in the first energy storage circuit and the second voltage in the energy storage capacitor in the third energy storage circuit may be as follows:
- the fourth voltage threshold can be understood as the minimum voltage value when the energy storage capacitor is in an undervoltage state.
- the second voltage is less than the second voltage threshold and the second voltage is greater than the fourth voltage threshold, it indicates that multiple capacitors are in an undervoltage state, their own voltage is insufficient, but the voltage in the energy storage capacitor is relatively sufficient. Therefore, multiple capacitors are continued to be controlled in parallel with the energy storage capacitor, and the first voltage and the second voltage are used to reversely power the server.
- the second switch tube When the voltage on the input bus is equal to the third voltage threshold and the second voltage is equal to the fourth voltage threshold, the second switch tube is controlled to be in the disconnected state, and after the second switch tube is in the disconnected state for a second time period, the fourth switch tube is controlled to be in the on state, and when the first switch tube and the third switch tube are both in the disconnected state and the diode is in the unidirectional conduction state, multiple capacitors and energy storage capacitors are controlled to be connected in series, and the first voltage and the second voltage are used to reversely power the server.
- the voltage on the input bus is equal to the third voltage threshold and the second voltage is equal to the fourth voltage threshold, it indicates that multiple capacitors and energy storage capacitors are all in an undervoltage state.
- the second switch tube is controlled to be in the disconnected state, and after the second switch tube is in the disconnected state for a second time period, the fourth switch tube is controlled to be in the on state, and when the first switch tube and the third switch tube are both in the disconnected state and the diode is in the unidirectional conduction state, multiple capacitors and energy storage capacitors are controlled to be connected in series, and the first voltage and the second voltage are used to reversely power the server, thereby releasing the electrical energy stored in multiple capacitors and energy storage capacitors as much as possible to extend the power-off holding time.
- FIG6 is a flow chart of the power supply protection method according to the embodiment of the present application. As shown in FIG6, the process includes the following steps:
- Step S601 detecting the voltage on the server input bus.
- Step S601 detecting the voltage on the server input bus.
- Step S602 when the voltage on the input bus is less than or equal to the first voltage threshold, the server is reversely powered based on the first voltage in the plurality of capacitors in the first energy storage circuit, and/or the server is reversely powered based on the second voltage in the energy storage capacitor in the third energy storage circuit.
- the server is reversely powered based on the first voltage in the plurality of capacitors in the first energy storage circuit, and/or the server is reversely powered based on the second voltage in the energy storage capacitor in the third energy storage circuit.
- Step S603 If the voltage on the input bus is greater than the first voltage threshold, the third switch tube in the first energy storage unit is controlled to be in an on state to control the multiple capacitors to store energy according to the voltage.
- the third switch tube in the first energy storage unit is controlled to be in an on state to control multiple capacitors to store energy according to the voltage on the input bus, so that when the input voltage drops abnormally or fails later, the electric energy stored in the multiple capacitors can be used to power the server load, and Smoothing the voltage on the input bus when powering the server through the input bus using multiple capacitors.
- Step S604 when the third switch tube is in the on state for a third time period, the first switch tube in the second energy storage circuit is controlled to be in the on state, so as to control the inductor in the second energy storage circuit to store energy in the energy storage capacitor.
- the input bus can provide stable power supply to the server, and then when the third switch tube is in the on state, the first switch tube in the second energy storage circuit is controlled to be in the on state, so as to control the inductor in the second energy storage circuit to store energy for the energy storage capacitor.
- the inductor is used to store energy to boost the voltage on the bus to the target voltage.
- the second energy storage circuit can be controlled to store energy for the energy storage capacitor in the following manner: the first switch tube and the second switch tube in the third energy storage circuit are controlled to be turned on alternately according to a specified duty cycle to charge the energy storage capacitor through the inductor, thereby helping to balance the energy stored in the second energy storage circuit and the third energy storage circuit, avoiding excessive energy loss, and helping to ensure the stability of the power-off retention circuit.
- the power supply protection method provided in this embodiment controls the first energy storage circuit or the third energy storage circuit in the power-off holding circuit to store energy when the voltage on the server input bus is in a normal state; when the voltage on the input bus drops abnormally or fails, the fluctuating voltage of the input bus can be smoothed, thereby meeting the demand for providing the power-off holding time for the server while ensuring the safety of the server.
- the power supply protection method further includes:
- Step S605 detecting whether the second voltage in the energy storage capacitor is equal to the second voltage threshold.
- detecting whether the second voltage in the energy storage capacitor is equal to the second voltage threshold is used to detect whether the energy storage capacitor reaches a saturation state during the energy storage process.
- Step S606 if the second voltage is equal to the second voltage threshold, the second switch tube is controlled to be continuously in the on state, and the first switch tube is controlled to be continuously in the off state, so that when the diode of the first energy storage circuit is in the unidirectional conduction state, the energy storage capacitor is in the discharge state.
- the characteristics of the energy storage capacitor with large internal resistance and slow self-discharge are utilized to control the second energy storage circuit to enter the standby shutoff self-discharge state for a long time, thereby avoiding the energy storage capacitor from being in the energy storage state continuously, thereby reducing the overall light-load power consumption of the power supply and reducing the power supply electromagnetic interference problem caused by adding high-frequency circuits.
- Step S607 when the second voltage is equal to the fifth voltage threshold, the first switch tube is controlled to be in the on state, and the second switch tube is controlled to be continuously in the off state, so as to control the inductor in the second energy storage circuit to continue to supply power to the energy storage capacitor.
- the fifth voltage threshold can be understood as the minimum overvoltage of the energy storage capacitor.
- the voltage of the energy storage capacitor has reached the critical value.
- the first switch tube is controlled to be in the on state, and the second switch tube is controlled to be continuously in the off state, so as to control the inductor in the second energy storage circuit to continue to supply power to the energy storage capacitor.
- the power supply protection method provided in this embodiment can meet the requirement of providing a power-off holding time for the server while avoiding excessive loss of electric energy, thereby helping to ensure the stability of the power-off holding circuit.
- the inductor is an energy storage current limiting coil
- the second energy storage circuit also includes: a magnetic excitation saturation control module, a magnetic excitation saturation coil and a magnetic core; the energy storage current limiting coil, the magnetic core and the magnetic excitation saturation coil constitute a coupled inductor; the magnetic excitation saturation control module is used to control the current in the magnetic excitation saturation coil, and the current is used to control the energy storage current limiting coil to be in a current limiting state or to control the energy storage current limiting coil to be in a saturation state, thereby reducing the inductance requirement of the inductor and facilitating the integrated design with the inductance required for inductor current limiting; at the same time, entering the shutdown self-discharge state for a long time can realize the second energy storage circuit to reduce the overall light load power consumption of the power supply, and reduce the power supply electromagnetic interference problem caused by adding high-frequency circuits, thereby helping to enhance the stability of the server.
- the energy storage current limiting coil when the second switch tube is in the on state and the third switch tube is in the off state, the energy storage current limiting coil is used to charge the energy storage capacitor in the current limiting state; when the second switch tube is in the on state, the third switch tube is in the off state and the diode is in the unidirectional conduction state, the energy storage capacitor reversely supplies power to the server when the energy storage current limiting coil is in the saturation state.
- the present application also provides a power supply control circuit, which is used to control the above power-off holding circuit to reversely supply power to the server.
- the power supply control circuit includes:
- the first driving circuit 710 includes a first power supply 711, a first switching switch 712, a second switching switch 713, a first control of a third switch tube,
- the first power supply 711, the first switching switch 712, the second switching switch 713, the first delay unit 715 and the second control driving unit 716 of the second switch tube are connected in series in sequence, the first control driving unit 714 is connected between the second switching switch 713 and the first delay unit 715, the first power supply 711 is used to power the first driving circuit 710, the first control driving unit 714 is used to control the third switch tube to be in the on state, or the first control driving unit 714 is used to control the third switch tube to be in the off state, and the second control driving unit 716 is used to control the second switch tube to be in the on state.
- the first driving circuit 710 is used to control whether multiple capacitors and energy storage capacitors are connected in parallel to provide reverse power to the server.
- the input voltage detection unit 720 is connected to the input bus and is used to detect the voltage on the input bus.
- the input voltage detection unit 720 may be used for detection.
- An input voltage judgment unit 730 wherein the first end of the input voltage judgment unit 730 is connected to the input voltage detection unit, and the second end of the input voltage judgment unit 730 is connected to the second switching switch 713.
- the input voltage judgment unit 730 is used to compare the first voltage in multiple capacitors in the first energy storage circuit with the first voltage threshold, and to control the second switching switch 713 to be in an on state or an off state according to the first comparison result, wherein the first comparison result is a comparison result between the first voltage and the first voltage threshold.
- the input voltage judgment unit 730 is used to control whether the second switching switch 713 is in the on state or the off state according to the size between the first voltage and the first voltage threshold, thereby determining whether the first control circuit can be in the on state.
- the capacitor voltage detection unit 740 is connected to the energy storage capacitor in the third energy storage circuit, and the capacitor voltage detection unit 740 is used to detect the second voltage in the energy storage capacitor.
- the capacitor voltage detection unit 740 can detect whether the energy storage capacitor reaches a saturation state.
- a capacitor voltage judgment unit 750 wherein the first end of the capacitor voltage judgment unit 750 is connected to the capacitor voltage detection unit 740, and the second end of the capacitor voltage judgment unit 750 is connected to the first switching switch 712.
- the capacitor voltage judgment unit 750 is used to compare the second voltage with the second voltage threshold, and to control the first switching switch 712 to be in an on state or to control the first switching switch 712 to be in an off state according to the second comparison result; the second comparison result is a comparison result between the second voltage and the second voltage threshold.
- the capacitor voltage judgment unit 750 is used to control whether the first switching switch 712 is in an on state or an off state according to the size between the second voltage and the second voltage threshold, and then jointly determine with the second switching switch 713 whether the first driving circuit 710 can be in a conductive state.
- the power supply control circuit further includes: a second drive circuit 760.
- the second drive circuit 760 includes a second power supply 761, a third switch 762, a fourth switch 763, a second control drive unit 716, a second delay unit 764, and a third control drive unit 765 of a fourth switch tube.
- the second power supply 761, the third switch 762, the fourth switch 763, the second delay unit 764, and the third control drive unit 765 are sequentially connected in series, the second control drive unit 716 is connected between the third switch 762 and the second delay unit 764, the second power supply 761 is used to supply power to the second drive circuit 760, the second control drive unit 716 is also used to control the second switch tube to be in an off state, and the third control drive unit 765 is used to control the fourth switch tube to be in an on state.
- the second driving circuit 760 is used to control whether multiple capacitors and energy storage capacitors are connected in series to reversely power the server.
- the second end of the input voltage determination unit 730 is also connected to the fourth switch 763, and the input voltage determination unit 730 is further used to control the fourth switch 763 to be in an on state or to control the fourth switch 763 to be in an off state according to the first comparison result.
- the input voltage judgment unit 730 can control the on and off states of the second switching switch 713 and the fourth switching switch 763 respectively according to the size between the first voltage and the first voltage threshold, thereby achieving the purpose of separately controlling the third switch tube and the second switch tube.
- the second end of the capacitor voltage determination unit 750 is also connected to the third switch 762, and the capacitor voltage determination unit 750 is also used to determine the capacitor voltage according to the second The comparison result controls the third switch 762 to be in an on state, or controls the third switch 762 to be in an off state.
- the input voltage judgment unit 730 can control the on and off states of the first switching switch 712 and the third switching switch 762 respectively according to the size between the second voltage and the second voltage threshold, thereby achieving the purpose of separately controlling the second switch tube and the fourth switch tube.
- the input voltage judgment unit 730 controls the second switch 713 to be in the on state, so as to send the first control signal to the second control driving unit 716, and the second control driving unit 716 controls the third switch tube to be in the on state according to the first control signal;
- the input voltage judgment unit 730 controls the second switch 713 to be in the on state, so as to send the second control signal to the second control driving unit 716, and the second control driving unit 716 controls the third switch tube to be in the off state according to the second control signal;
- the input voltage determination unit 730 controls the second switch 713 to be in an off state to keep the third switch tube in an off state when the first comparison result is that the first voltage is less than the first voltage threshold and the first voltage is greater than the third voltage threshold;
- the input voltage judgment unit 730 controls the fourth switching switch 763 to be in the on state to send the third control signal to the second control driving unit, and the third control signal is used to control the second switch tube to be in the off state.
- the capacitor voltage judgment unit 750 controls the first switch 712 to be in the on state, so as to send the fourth control signal to the second control driving unit 716 through the first delay unit 715, and the second control driving unit 716 controls the second switch tube to be in the on state according to the fourth control signal, and the first delay unit 715 is used to delay the fourth control signal for the first time length and send it to the second control driving unit;
- the capacitor voltage judgment unit 750 controls the first switch 712 to be in the on state, and the second control driving unit 716 continuously controls the second switch tube to be in the on state according to the fourth control signal;
- the capacitor voltage judgment unit 750 controls the first switching switch 712 to be in the off state to stop sending the fourth control signal to the second control drive unit 716, and controls the third switching switch 762 to be in the on state to send the fifth control signal to the third control drive unit 765 through the second delay unit 764.
- the fifth control signal is used to control the third switching switch 762 to be in the on state
- the second delay unit 764 is used to delay the fifth control signal for a second time period before sending it to the third control drive unit 765.
- the power supply control circuit provided in the present application helps to quickly determine the voltage status of multiple capacitors and energy storage capacitors through voltage comparison, which in turn helps to switch circuits in a timely manner and smooth the fluctuating voltage of the input bus, thereby extending the power-off protection time.
- the first driving circuit 710 when the first switching switch 712 and the second switching switch 713 are both in the on state, the first driving circuit 710 is in the on state; when the third switching switch 762 and the fourth switching switch 763 are both in the on state, the second driving circuit 760 is in the on state. It is a mutually exclusive event that the first driving circuit 710 and the second driving circuit 760 are both in the on state. That is, when the first driving circuit 710 is in the on state, the second driving circuit 760 must be in the off state; but when the first driving circuit 710 is in the off state, the second driving circuit 760 is not necessarily in the off state.
- the first driving circuit 710 When the second driving circuit 760 is in the on state, the first driving circuit 710 must be in the off state; but when the second driving circuit 760 is in the off state, the first driving circuit 710 is not necessarily in the off state, and then the power-off holding circuit can be specifically controlled in combination with the states of the first voltage and the second voltage, so that the first voltage and the second voltage are reasonably used, and the power-off protection duration can be effectively extended, so that the server can achieve the purpose of power-off holding.
- a plurality of capacitors are connected in parallel with the energy storage capacitor
- the multiple capacitors are connected in series with the energy storage capacitor.
- the above power supply control circuit is used to control the power-off holding circuit to reversely supply power to the server, which helps to shorten the control time and achieve fast switching. Rapidly responding to power demand on the load side helps improve efficiency, thereby ensuring that the server has sufficient power-off protection time.
- the power-off holding circuit shown in FIG4 is combined with the power supply control circuit shown in FIG8 to control the power-off holding circuit to reversely supply power to the server.
- the working sequence can be shown in FIG9:
- the input voltage judgment unit judges whether the voltage on the input bus has dropped to the first voltage threshold.
- the second switching switch 713 is controlled to be in the on state, and then the second control signal is sent to the second control driving unit 716, so that the second control driving unit 716 controls the third switch tube Q1 to be in the off state according to the second control signal.
- the capacitor voltage judgment unit 750 judges that the second voltage of the energy storage capacitor is equal to the second voltage threshold.
- the first switching switch 712 is controlled to be in the on state, and then the fourth control signal is sent to the second switch tube Q4 through the first delay unit, so that after the third switch tube Q1 is in the off state for a first time, the second switch tube Q4 is controlled to be in the on state, and the current in the excitation saturation coil L2 is controlled through the magnetic excitation saturation control module 40 to control the energy storage current limiting coil L1 to be in the saturation state.
- the first switching switch 712 and the second switching switch 713 are both in the on state, so that multiple capacitors 11 can be connected in parallel with the energy storage capacitor C3, and the purpose of reverse power supply for the server can be achieved when the diode D1 is in the unidirectional conduction state.
- the input voltage detection unit 720 detects whether the first voltage reaches the third voltage threshold, and the capacitor voltage detection unit 740 detects whether the second voltage reaches the fourth voltage threshold. If the first voltage does not reach the third voltage threshold and/or the second voltage does not reach the fourth voltage threshold, the multiple capacitors 11 and the energy storage capacitor C3 are continuously connected in parallel, and the server is continuously reversely powered when the diode D1 is in a unidirectional conduction state. Since the discharge path always exists when the voltage on the input bus is in a power-off state, the time requirement for the instantaneous cut-in of the energy storage capacitor can be reduced, thereby ensuring the reliability of the switching state.
- the input voltage detection unit 720 detects that the first voltage reaches the third voltage threshold, and the capacitor voltage detection unit 740 detects that the second voltage reaches the fourth voltage threshold, the input voltage detection unit 720 controls the fourth switching switch 763 to be in the on state, and then sends the third control signal to the second control drive unit 716, so that the second control drive unit 716 controls the second switch tube Q4 to be in the off state; the capacitor voltage detection unit 740 controls the first switching switch 712 to be in the off state, so as to stop sending the fourth control signal to the second control drive unit 716, thereby ensuring that the second switch tube Q4 is in the off state.
- the capacitor voltage detection unit 740 is also used to control the third switch 762 to be in the on state, so as to send the fifth control signal to the third control drive unit 765 through the second delay unit 764, and the third control drive unit 765 controls the third switch 762 to be in the on state after the second switch tube Q4 is in the off state for a second time, so as to achieve the purpose of connecting multiple capacitors 11 and the energy storage capacitor C3 in series, and reversely supplying power to the server when the diode is in a unidirectional conduction state, so as to make full use of the electric energy in the multiple capacitors 11 and the energy storage capacitor C3, and extend the duration of the power-off holding time provided to the server.
- the energy storage capacitor C3 is connected in series with multiple capacitors 11 to release energy, in the process of switching the power supply circuit of the server to the power-off holding circuit to power the server, by cutting off the large capacitor on the input bus, it is ensured that there is no large-capacitance energy storage capacitor on the input bus branch, so that when the power supply circuit is switched, the surge energy on the input bus is small and the existence time is short, and the current limiting resistor R1 also has a current limiting function, so as to effectively ensure the safety of reverse power supply to the server.
- a power supply protection device is also provided, which is used to implement the above-mentioned embodiments and preferred implementation modes, and the descriptions that have been made will not be repeated.
- the term "module” can implement a combination of software and/or hardware of a predetermined function.
- the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.
- This embodiment provides a power supply protection device, as shown in FIG10 , including:
- the first detection module 1001 is used to detect the voltage signal on the server input bus
- the first control module 1002 is used to reverse power the server based on the first voltage in the multiple capacitors in the first energy storage circuit and/or the second voltage in the energy storage capacitor in the third energy storage circuit when the voltage on the input bus is less than or equal to the first voltage threshold.
- the plurality of capacitors include a first capacitor and a second capacitor connected in parallel with the first capacitor;
- the first energy storage circuit further includes: a third switch tube and a diode; the first capacitor and the third switch tube are sequentially connected in series between the positive electrode of the input bus and the negative electrode of the input bus; the diode, the positive electrode of the diode is connected to the negative electrode of the input bus; the second capacitor is connected in series between the positive electrode of the input bus and the negative electrode of the diode;
- the first control module 1002 includes:
- the first control unit is used to control the third switch tube to be in an off state when the voltage on the input bus is equal to the first voltage threshold and the second voltage in the energy storage capacitor is equal to the second voltage threshold, so as to reversely power the server based on the first voltage in the first capacitor and the second capacitor when the diode is in a unidirectional conduction state.
- the first control module 1002 further includes:
- the second control unit is used to control the third switch tube to be in an off state for a first period of time when the voltage on the input bus is less than the first voltage threshold, the voltage on the input bus is greater than the third voltage threshold, and the second voltage is equal to the second voltage threshold, and then control the second switch tube in the third energy storage circuit to be in an on state, and when the first switch tube in the second energy storage circuit is in an off state and the diode is in a unidirectional conduction state, control multiple capacitors to be connected in parallel with the energy storage capacitor, so that the first voltage and the second voltage are used to reversely power the server.
- the power-off holding circuit further includes: a current limiting resistor and a fourth switch tube; one end of the current limiting resistor is arranged between the second switch tube and the energy storage capacitor; the fourth switch tube is connected in series between the other end of the current limiting resistor and the cathode of the diode;
- the first control module 1002 further includes:
- a third control unit is used to continue to control the plurality of capacitors to be connected in parallel with the energy storage capacitor, and to reversely power the server with the first voltage and the second voltage when the voltage on the input bus is equal to the third voltage threshold, the second voltage is less than the second voltage threshold, and the second voltage is greater than the fourth voltage threshold;
- the fourth control unit is used to control the second switch tube to be in an off state when the voltage on the input bus is equal to the third voltage threshold and the second voltage is equal to the fourth voltage threshold, and after the second switch tube is in the off state for a second period of time, control the fourth switch tube to be in an on state, and when the first switch tube and the third switch tube are both in the off state and the diode is in a unidirectional conduction state, control multiple capacitors and energy storage capacitors to be connected in series, and reverse power the server with the first voltage and the second voltage.
- the device further comprises:
- a fifth control module configured to control the third switch tube in the first energy storage unit to be in an on state if the voltage on the input bus is greater than a first voltage threshold, so as to control the multiple capacitors to store energy according to the voltage;
- the sixth control module is used to control the first switch tube in the second energy storage circuit to be in the on state after the third switch tube is in the on state for a third period of time, so as to control the inductor in the second energy storage circuit to store energy in the energy storage capacitor, and the inductor is used to store energy to boost the voltage on the input bus to the target voltage.
- the second energy storage circuit is controlled to store energy in the energy storage capacitor in the following manner:
- the first switch tube and the second switch tube in the third energy storage circuit are controlled to be turned on alternately according to a specified duty cycle, so as to provide the inductor to charge the energy storage capacitor.
- the device further comprises:
- a second detection module used to detect whether a second voltage in the energy storage capacitor is equal to a second voltage threshold
- a seventh control module configured to control the second switch tube to be continuously in the on state and the first switch tube to be continuously in the off state if the second voltage is equal to the second voltage threshold, so that when the diode of the first energy storage circuit is in the unidirectional conduction state, the energy storage capacitor is in the discharge state;
- the eighth control module is used to control the first switch tube to be in the on state and control the second switch tube to be in the off state when the second voltage is equal to the fifth voltage threshold, so as to control the inductor in the second energy storage circuit to continue to supply power to the energy storage capacitor.
- the inductor is an energy storage current limiting coil
- the second energy storage circuit also includes: a magnetic excitation saturation control module, a magnetic excitation saturation coil and a magnetic core; the energy storage current limiting coil, the magnetic core and the magnetic excitation saturation coil constitute a coupled inductor; the magnetic excitation saturation control module is used to control the current in the magnetic excitation saturation coil, and the current is used to control the energy storage current limiting coil to be in a current limiting state or to control the energy storage current limiting coil to be in a saturation state.
- the energy storage current limiting coil is used to charge the energy storage capacitor in the current limiting state
- the energy storage capacitor reversely supplies power to the server when the energy storage current limiting coil is in the saturation state.
- the power supply protection device in this embodiment is presented in the form of a functional unit, where the unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and a memory that executes one or more software or fixed programs, and/or other A device that provides the above functions.
- ASIC Application Specific Integrated Circuit
- the embodiment of the present application also provides a server having the power supply protection device shown in FIG. 10 above.
- the server includes: one or more processors 110, a memory 120, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces.
- the various components are connected to each other using different buses for communication, and can be installed on a common motherboard or installed in other ways as needed.
- the processor can process instructions executed in the server, including instructions stored in or on the memory to display graphical information of the GUI on an external input/output device (such as a display device coupled to the interface).
- an external input/output device such as a display device coupled to the interface.
- multiple processors and/or multiple buses can be used together with multiple memories and multiple memories.
- multiple servers can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system).
- a processor 110 is taken as an example.
- the processor 110 may be a central processing unit, a network processor or a combination thereof.
- the processor 110 may further include a hardware chip.
- the hardware chip may be a dedicated integrated circuit, a programmable logic device or a combination thereof.
- the programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic or any combination thereof.
- the memory 120 stores instructions executable by at least one processor 110 so as to enable at least one processor 110 to implement the method shown in the above embodiment.
- the memory 120 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and applications required for at least one function; the data storage area may store data created according to the use of the server, etc.
- the memory 120 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device.
- the memory 120 may optionally include a memory remotely arranged relative to the processor 110, and these remote memories may be connected to the server via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.
- the memory 120 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid state drive; the memory 120 may also include a combination of the above types of memory.
- a volatile memory such as a random access memory
- the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid state drive
- the memory 120 may also include a combination of the above types of memory.
- the server further includes an input device 130 and an output device 140.
- the processor 110, the memory 120, the input device 130 and the output device 140 may be connected via a bus or other means, and FIG11 takes the connection via a bus as an example.
- the input device 130 can receive input digital or character information, and generate key signal input related to the user settings and function control of the server, such as a touch screen, a keypad, a mouse, a track pad, a touch pad, an indicator bar, one or more mouse buttons, a trackball, a joystick, etc.
- the output device 140 may include a display device, an auxiliary lighting device (e.g., an LED) and a tactile feedback device (e.g., a vibration motor), etc.
- the above-mentioned display device includes but is not limited to a liquid crystal display, a light emitting diode, a display and a plasma display. In some optional embodiments, the display device can be a touch screen.
- the embodiment of the present application also provides a non-volatile computer-readable storage medium 1201.
- the above method according to the embodiment of the present application can be implemented in hardware, firmware, or implemented as a computer instruction 1202 that can be recorded in a storage medium, or downloaded through a network and originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware.
- the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above types of memories.
- a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer instructions. When the software or computer instructions are accessed and executed by a computer, a processor, or hardware, the method shown in the above embodiment is implemented.
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Abstract
本申请涉及供电保护技术领域,公开了掉电保持电路、供电保护方法、供电控制电路及装置。掉电保持电路包括:第一储能电路,包括多个并联连接的多个电容,多个电容用于根据服务器的输入母线电压储能,以及为服务器反向供电;第二储能电路,包括电感和第一开关管,电感和第一开关管依次串联于输入母线正极与输入母线负极之间,电感用于储能,以将电压升压至目标电压;第三储能电路,包括第二开关管和储能电容,第二开关管和储能电容依次串联于电感与输入母线负极之间,电感用于为储能电容充电,储能电容为服务器反向供电。
Description
相关申请的交叉引用
本申请要求于2023年06月13日提交中国专利局,申请号为202310695687.4,申请名称为“掉电保持电路、供电保护方法、供电控制电路及装置”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
本申请涉及掉电保持电路、供电保护方法、供电控制电路及装置。
随着电源业务的持续发展,服务器对电源持续稳定性的要求越来越高。当服务器的输入电压异常跌落或发生故障时,系统需要在掉电保持时间内迅速将系统运行状态、网压的异常情况等进行上报存储,并切换到备用电源供电方式。因此,需要在服务器的供电系统中该设置掉电保持电路,以保障服务器具备掉电保持时间。
相关技术中,为使服务器具有掉电保持时间,则在服务器的直流开关电源输入端并联大容值电解电容,以当服务器输入电压发生异常跌落或发生故障时,能够利用大容值电解电容为服务器供电,进而满足服务器具有掉电保持时间的需求。
然而,发明人意识到,采用该种方式为服务器供电,当服务器输入电压出现异常跌落或发生故障时,服务器内部电压与大容值电解电容释放的电压之间的电压差过大,会导致服务器输入浪涌电流较大,从而影响服务器安全。因此,亟需一种能够满足服务器具有掉电保持时间需求且能够保障服务器安全的掉电保持电路。
发明内容
根据本申请公开的各种实施例,第一方面,提供了一种掉电保持电路,掉电保持电路包括:
第一储能电路,包括多个并联连接的多个电容,多个电容用于根据服务器的输入母线电压储能,以及用于为服务器反向供电;
第二储能电路,包括电感和第一开关管,电感和第一开关管依次串联于输入母线正极与输入母线负极之间,电感用于储能,以将电压升压至目标电压;
第三储能电路,包括第二开关管和储能电容,第二开关管和储能电容依次串联于电感与输入母线负极之间,电感用于为储能电容充电,储能电容为服务器反向供电。
根据本申请公开的各种实施例,第二方面,提供了一种供电保护方法,应用于上述第一方面或其对应的任一实施方式的掉电保持电路,方法包括:
检测服务器输入母线上的电压信号;
当输入母线上的电压小于或者等于第一电压阈值时,基于第一储能电路中的多个电容内的第一电压为服务器反向供电,和/或第三储能电路中的储能电容内的第二电压为服务器反向供电。
根据本申请公开的各种实施例,第三方面,提供了一种供电控制电路,供电控制电路用于控制掉电保持电路为服务器反向供电,掉电保持电路为第一方面或其对应的任一实施方式的掉电保持电路,供电控制电路包括:
第一驱动电路,包括第一电源、第一切换开关、第二切换开关、第三开关管的第一控制驱动单元、第一延时单元以及第二开关管的第二控制驱动单元,第一电源、第一切换开关、第二切换开关、第一延时单元以及第二控制驱动单元依次串联,第一控制驱动单元连接在第二切换开关与第一延时单元之间,第一电源用于为第一驱动电路供电,第一控制驱动单元用于控制第三开关管处于导通状态或断开状态,第二控制
驱动单元用于控制第二开关管处于导通状态;
输入电压检测单元,与输入母线连接,用于检测输入母线上的电压;
输入电压判断单元,输入电压判断单元的第一端与输入电压检测单元连接,输入电压判断单元的第二端与第二切换开关连接,输入电压判断单元用于比较第一储能电路中的多个电容内的第一电压与第一电压阈值之间的大小,以及用于根据第一比较结果控制第二切换开关处于导通状态,或者控制第二切换开关处于断开状态,第一比较结果为第一电压与第一电压阈值之间的比较结果;
电容电压检测单元,与第三储能电路中的储能电容连接,电容电压检测单元用于检测储能电容内的第二电压;
电容电压判断单元,电容电压判断单元的第一端与电容电压检测单元连接,电容电压判断单元的第二端与第二切换开关连接,电容电压判断单元,用于比较第二电压与第二电压阈值之间的大小,以及用于根据第二比较结果控制第一切换开关处于导通状态,或者控制第一切换开关处于断开状态;第二比较结果为第二电压与第二电压阈值之间的比较结果。
根据本申请公开的各种实施例,第四方面,提供了一种供电保护装置,装置包括:
检测模块,用于检测服务器输入母线上的电压信号;
控制模块,用于当输入母线上的电压小于或者等于第一电压阈值时,基于第一储能电路中的多个电容内的第一电压为服务器反向供电,和/或第三储能电路中的储能电容内的第二电压为服务器反向供电。
根据本申请公开的各种实施例,第五方面,提供了一种服务器,包括:存储器和处理器,存储器和处理器之间互相通信连接,存储器中存储有计算机指令,处理器通过执行计算机指令,从而执行上述的第二方面或其对应的任一实施方式的供电保护方法。
根据本申请公开的各种实施例,第六方面,提供了一种非易失性计算机可读存储介质,该计算机可读存储介质上存储有计算机指令,计算机指令用于使计算机执行上述的第二方面或其对应的任一实施方式的供电保护方法。
为了更清楚地说明本申请具体实施方式或现有技术中的技术方案,下面将对具体实施方式或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图是本申请的一些实施方式,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1是根据本申请实施例的掉电保持电路的结构示意图;
图2是根据本申请实施例的另一掉电保持电路的结构示意图;
图3是根据本申请实施例的又一掉电保持电路的结构示意图;
图4是根据本申请实施例的再一掉电保持电路的结构示意图;
图5是根据本申请实施例的供电保护方法的流程示意图;
图6是根据本申请实施例的另一供电保护方法的流程示意图;
图7是根据本申请实施例的供电控制电路的结构示意图;
图8是根据本申请实施例的另一供电控制电路的结构示意图;
图9是根据本申请实施例的为服务器反向供电的工作时序图;
图10是根据本申请实施例的供电保护装置;
图11是本申请实施例的服务器的硬件结构示意图;
图12是本申请实施例的非易失性计算机可读存储介质的结构示意图。
附图标记:
10:第一储能电路;20:第二储能电路;30:第三储能电路;
11:多个电容;21:磁芯;40:磁激饱和控制模块;
710:第一驱动电路;720:输入电压检测单元;730:输入电压判断单元;
711:第一电源;712:第一切换开关;713:第二切换开关;
714:第一控制驱动单元;715:第一延时单元;716:第二控制驱动单元;
740:电容电压检测单元;750:电容电压判断单元;760:第二驱动电路;
761:第二电源;762:第三切换开关;763:第四切换开关;
764:第二延时单元;765:第三控制驱动单元。
10:第一储能电路;20:第二储能电路;30:第三储能电路;
11:多个电容;21:磁芯;40:磁激饱和控制模块;
710:第一驱动电路;720:输入电压检测单元;730:输入电压判断单元;
711:第一电源;712:第一切换开关;713:第二切换开关;
714:第一控制驱动单元;715:第一延时单元;716:第二控制驱动单元;
740:电容电压检测单元;750:电容电压判断单元;760:第二驱动电路;
761:第二电源;762:第三切换开关;763:第四切换开关;
764:第二延时单元;765:第三控制驱动单元。
为使本申请实施例的目的、技术方案和优点更加清楚,下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例是本申请一部分实施例,而为非全部的实施例。基于本申请中的实施例,本领域技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本申请保护的范围。
相关技术中,为使服务器具有掉电保持时间,则在服务器的直流开关电源输入端并联大容值电解电容,以当服务器输入电压出现异常跌落或发生故障时,能够利用大容值电解电容为服务器供电,进而满足服务器具有掉电保持时间的需求。
但该类电容体积过大,通常体积大小近似于服务器电源整体体积的1/4,以及随着输出功率的增加将会达到1/3才能满足必要的需求,已经严重制约了服务器电源高效高功率密度的发展。且当服务器输入电压出现异常跌落或发生故障时,由于服务器内部电压与大容值电解电容释放的电压之间的电压差过大,会导致服务器输入浪涌电流较大,从而影响服务器安全。
鉴于此,在本申请实施例中,提供一种掉电保持电路,包括:第一储能电路,包括多个并联连接的多个电容,多个电容用于根据服务器的输入母线电压储能,以及用于为服务器反向供电;第二储能电路,包括电感和第一开关管,电感和第一开关管依次串联于输入母线正极与输入母线负极之间,电感用于储能,以将电压升压至目标电压;第三储能电路,包括第二开关管和储能电容,第二开关管和储能电容依次串联于电感与输入母线负极之间,电感用于为储能电容充电,储能电容为服务器反向供电。通过本申请提供的掉电保持电路,可以通过多个储能电路分别根据服务器输入母线的电压储能,进而当服务器输入电压出现异常跌落或发生故障时,能够平滑输入母线波动电压,从而能够满足为服务器提供掉电保持时间的需求的同时,保障服务器的安全。
本实施例提供一种掉电保持电路,如图1所示,包括:第一储能电路10、第二储能电路20和第三储能电路30。
第一储能电路10,包括多个并联连接的多个电容11。
在本申请实施例中,为满足储能需求,且避免掉电保持电路的尺寸过大,则采用将多个电容11并联连接的方式构成第一储能电路10,以利用多个电容11根据服务器的输入母线电压储能,以及当母线上的输入电压出现异常跌落或发生故障时,为服务器反向供电。且,采用多个电容11并联连接,有助于后续当输入母线上的电压出现异常跌落或发生故障时,通过第一储能电路10为服务器供电能够平滑母线电压波动,从而有助于保障服务器的安全。
第二储能电路20,包括电感L1和第一开关管Q3,电感L1和第一开关管Q3依次串联于输入母线正极与输入母线负极之间。
在本申请实施例中,第二储能电路20可以理解为是一种升压电路。电感L1可以将输入母线流入的电压升压至目标电压,以供第三储能电路30能够在输入母线的电压处于正常状态时,预先存储高压电能,进而后续为服务器供电时,能够为服务器提供充足的掉电保持时间。
进一步地,电感L1可以理解为是一种升压(Boost)电感,功率需求小,设计难度低,其电感量设计值兼顾限流特性需求,可以实现掉电保持时具备短暂的限流功能,进而后续当切换到储能电容C3通过输入母线为服务器供电时,能够抑制输入母线上所引起的浪涌电流,从而有助于增强掉电保持电路的可靠性。
并且,将第二储能电路20设置在掉电保持电路中,不将其放置在服务器的主功率支路上,能够降低第
二储能电路20所需的功率,从而能够增强掉电保持电路的可靠性的同时,有助于减少第二储能电路20体积的占用。
第三储能电路30,包括第二开关管Q4和储能电容C3,第二开关管Q4和储能电容C3依次串联于电感L1与输入母线负极之间,电感L1用于为储能电容C3充电。
在本申请实施例中,第三储能电路30用于存储高压电能,以及当母线上的输入电压出现异常跌落或发生故障时,为服务器反向供电。由于电容储能满足下述能量公式:因此,当储能电容C3利用目标电压储能时,所存储的电能会高于服务器所需的电能,进而当输入母线上的电压出现异常跌落或发生故障时,能够为服务器提供所需的能量供给,进而有助于为服务器提供充足的掉电保持时间。
本实施例提供的掉电保持电路,可以在服务器输入电压处于正常状态时,通过多个储能电路分别根据服务器输入母线的电压储能,也可以当服务器输入电压出现异常跌落或发生故障时,通过第一储能电路,和/或第二储能电路为服务器反向供电,进而有效减少输入母线上的浪涌电流,能够满足为服务器提供掉电保持时间的需求的同时,能够保障服务器的安全,且所占体积小,有助于保障服务器电源高效高功率密度的发展。
如图2所示,多个电容11,包括第一电容C1和与第一电容C1并联的第二电容C2;第一储能电路10还包括:第三开关管Q1和二极管D1。第一电容和第二电容和第三开关管Q1依次串联于输入母线的正极和输入母线的负极之间。在实际应用中,可以将第三开关管Q1的源级与多个电容11(第一电容C1和第二电容C2)的输出端连接,第三开关管Q1的漏级与输入母线的负极连接;也可以将第三开关管Q1的漏级与多个电容11(第一电容C1和第二电容C2)的输出端连接,第三开关管Q1的源级与输入母线的负极连接。具体串联方式,取决于使用需求,在本申请中不进行限定。
二极管D1,二极管D1的正极与输入母线的负极连接。第二电容C2串联于输入母线的正极与二极管D1的负极之间。可以通过第三开关管Q1控制多个电容11的充电或者放电状态,进而能够根据输入母线的电压状态,对多个电容11进行针对性控制。通过设置二极管D1,能够保障第一储能电路10通过输入母线为服务器供电时,多个电容11一直处于放电状态,进而避免反向供电的情况发生,从而有助于延长掉电保持时间。
在一些可选的实施方式中,第一电容C1和第二电容C2,用于在第三开关管Q1处于导通状态时,根据服务器的输入母线电压储能;第一电容C1和第二电容C2,还用于在第三开关管Q1处于断开状态且二极管D1处于单向导通状态时,为服务器反向供电。
具体地,当第三开关管Q1处于导通状态时,第一储能电路10串联于输入母线的正极和输入母线的负极之间,进而能够实现根据服务器的输入母线电压储能。进一步地,在输入母线持续为第一电容C1和第二电容C2供电的过程中,当第一电容C1和第二电容C2处于饱和状态时,可以等效输入母线的电压,进而能够为电感L1或者储能电容C3供电。
当第三开关管Q1处于断开状态且二极管D1处于单向导通状态时,多个电容11处于放电状态,可以为服务器反向供电,以维持服务器负载侧的用电需求。
且,在该种情况下,由于多个电容11无法继续充电,进而在将供电电路切换至由第一储能电路为服务器反向供电的过程中,能够大幅度降低输入母线上存在浪涌电流的能量和时间,进而能够解决储能电容C3不能直接并联切换到输入母线上的问题。
进一步地,由于第一储能电路10中存在二极管D1,进而可以保持放电通路一直存在,能够降低储能电容C3瞬间切入的时间要求,从而有助于确保切换状态判断的可靠性。二极管D1还用于在掉电切换的过程中,提供足够的输入负载保持能量。
在另一些可选的实施方式中,第三开关管Q1处于导通状态时,第一开关管Q3与第二开关管Q4按照指定占空比周期交替导通,以供电感L1为储能电容C3充电。
具体地,当第三开关管Q1处于导通状态时,第一开关管Q3与第二开关管Q4按照指定占空比周期交
替导通,以供电感L1为储能电容C3充电。例如:在单个指定占空比中包括第一占空比和第二占空比,第一占空比的执行时段早于第二占空比的执行时段。第一占空比用于控制第一开关管Q3是否处于导通状态,第二占空比用于控制第二开关管Q4是否处于导通状态。由于储能电容C3的目标电压是由电感L1提供,且当第一开关管Q3与第二开关管Q4同时处于导通状态时,会导致储能电容C3被短路。因此,为保障电感L1能够将目标电压通过第二开关管Q4为储能电容C3充电,则控制第一开关管Q3与第二开关管Q4交替导通,以利用储能电容内阻大自放电慢的特点,控制第二储能电路20可以长时间进入待机关断自放电状态,进而可实现降低电源整体轻载功耗,同时减少因增加高频电路导致的电源电磁干扰问题。
在一个或多个实施场景中,第一开关管Q3与第二开关管Q4交替频率可以在300kHZ~500kHz范围内,进而可降低对电感L1的电感量要求,便于与电感限流所需电感量的融合设计。并且,将第二储能电路与储能电容融合,最大限度减少对功率器件应用数量,进而能够进一步提升电源功率密度。
如图3所示,掉电保持电路还包括:限流电阻R1和第四开关管Q2;限流电阻R1一端设置于第二开关管Q4与储能电容C3之间;第四开关管Q2串联于限流电阻R1另一端与二极管D1的负极之间。以便当第一电容和第二电容、第二电容C2以及储能电容C3的能量释放到工作欠压点阈值时,可以基于限流电阻R1和第四开关管50,将储能电容C3与第一电容和第二电容和第二电容C2串联,以提升掉电保持电路通过输入母线为服务器供电的供电电压(例如:将储能电容C3与第一电容和第二电容和第二电容C2串联后,可将掉电电路输出的电压提升两倍左右),进而能够保障第一电容和第二电容、第二电容C2以及储能电容C3中存储的电能被充分利用,有助于缩短供电切换时长,从而能够有效延长掉电保持时间,以保障服务器能够稳定运行。
在一些可选的实施方式中,在第二开关管Q4处于导通状态、第一开关管Q3、第三开关管Q1以及第四开关管Q2均处于断开状态时,储能电容C3与多个电容11并联,为服务器反向供电,以延长为服务器提供掉电保持时间的时长。
在第一开关管Q3、第二开关管Q4以及第三开关管Q1均处于断开状态、第四开关管Q2处于导通状态且二极管D1处于单向导通状态时,储能电容C3与多个电容11串联,为服务器反向供电,以最大限度的利用多个电容11和储能电容C3中的电能,延长为服务器提供掉电保持时间的时长。进一步地,当储能电容C3与多个电容11串联释放能量的过程中,可以在将服务器的供电电路切换成掉电保持电路为服务器供电的过程中,通过切除输入母线上的大电容,确保输入母线支路上无大容值储能电容,进而使供电电路被切换时,输入母线上的浪涌能量小,存在时间短,且限流电阻R1也具有限流作用,从而能够有效保障为服务器反向供电的安全。
如图4所示,电感L1为储能限流线圈;第二储能电路20还包括:磁激饱和控制模块40、激磁饱和线圈L2以及磁芯21;储能限流线圈L1、磁芯21以及激磁饱和线圈L2构成耦合电感;磁激饱和控制模块40,用于控制激磁饱和线圈L2中的电流,电流用于控制储能限流线圈L1处于限流状态或者控制储能限流线圈处于饱和状态。通过利用磁集成原理控制储能电容C3的充放电状态,设计难度低,不仅可以实现掉电保持时储能限流线圈L1具备短暂的限流功能,还可以抑制能量储能电容C3切换到主功率通路时输入母线上产生的浪涌电流。
在一些可选的实施方式中,在第二开关管Q4处于导通状态且第三开关管Q1处于断开状态时,储能限流线圈L1用于在限流状态下为储能电容C3充电;在第二开关管Q4处于导通状态、第三开关管Q1处于断开状态以及二极管D1处于单向导通状态下,储能电容C3用于在储能限流线圈L1处于饱和状态时为服务器反向供电。由于储能电容C3自放电率缓慢,进而可以通过控制储能限流线圈L1是否处于电感饱和状态,控制储能电容C3是否处于自放电状态,进而能够降低对电感L1的电感量要求,便于与电感L1限流所需电感量的融合设计;同时长时间进入关断自放电状态可实现第二储能电路降低电源整体轻载功耗,并减少因增加高频电路导致的电源电磁干扰问题,从而有助增强服务器的稳定性。
并且,当储能电容C3切换到服务器主功率的通路上时,通过控制激磁饱和线圈L2电流,触发储能限
流线圈L1处于饱和状态,也可以实现将储能电容C3完全并联到输入母线通路上,输入母线上的电容内的电流可以通过流经二极管D1释放能量,从而为服务器提供供电保持服务。
通过本申请提供的掉电保持电路,不仅能够在输入母线的电压处于正常状态时进行储能,还能够解决服务器在输入电压异常跌落或发生故障时,为服务器提供必要的掉电保持时间,辅助服务器上报故障存储必要信息,并能够及时切换到备用电源供电,从而更具有适用性、更可靠。
基于相同发明构思,本申请还提供一种供电保护方法,应用于本申请提供的任意一种掉电保持电路,包括:检测服务器输入母线上的电压;当输入母线上的电压小于或者等于第一电压阈值时,基于第一储能电路中的多个电容内的第一电压为服务器反向供电,和/或第三储能电路中的储能电容内的第二电压为服务器反向供电。通过本申请提供的供电保护方法,能够当服务器输入母线上的电压出现异常跌落或发生故障时,平滑输入母线波动电压,为服务器提供掉电保持时间的需求的同时,保障服务器的安全。
根据本申请实施例,提供了一种供电保护方法实施例,需要说明的是,在附图的流程图示出的步骤可以在诸如一组计算机可执行指令的计算机系统中执行,并且,虽然在流程图中示出了逻辑顺序,但是在某些情况下,可以以不同于此处的顺序执行所示出或描述的步骤。
在本实施例中提供了一种供电保护方法,执行主体可以为服务器或者部署于服务器内部的基板管理控制器(Baseboard Management Controller,BMC)等,图5是根据本申请实施例的供电保护方法的流程图,如图5所示,该流程包括如下步骤:
步骤S501,检测服务器输入母线上的电压。
在本申请实施例中,检测输入母线上的电压的目的,是用于确定当前输入母线上的电压是否正常,是否能够为服务器正常供电。
步骤S502,当输入母线上的电压小于或者等于第一电压阈值时,基于第一储能电路中的多个电容内的第一电压为服务器反向供电,和/或第三储能电路中的储能电容内的第二电压为服务器反向供电。
在本申请实施例中,第一电压阈值可以理解为是预警电压,即维持服务器正常运行的最小电压值。若输入母线上的电压小于或者等于第一电压阈值,则表征服务器输入母线上的电压出现异常,或者存在跌落的情况发生,因此,为保障服务器能够及时切换供电电路,则基于第一储能电路中的多个电容内的第一电压为服务器反向供电,和/或第三储能电路中的储能电容内的第二电压为服务器反向供电,以为服务器提供掉电保持时间。
本实施例提供的供电保护方法,能够当服务器输入电压出现异常跌落或发生故障时,能够平滑输入母线波动电压,为服务器提供掉电保持时间的需求的同时,能够保障服务器的安全。
在一些可选的实施方式中,多个电容,包括第一电容和与第一电容并联的第二电容;第一储能电路还包括:第三开关管和二极管;第一电容和第三开关管依次串联于输入母线的正极和输入母线的负极之间;二级管,二极管的正极与输入母线的负极连接;第二电容串联于输入母线的正极与二极管的负极之间。
在一些可选的实施场景中,当输入母线上的电压等于第一电压阈值时,基于第一储能电路中的多个电容内的第一电压为服务器反向供电的过程可以如下:当输入母线上的电压等于第一电压阈值,且储能电容内的第二电压等于第二电压阈值时,控制第三开关管处于断开状态,以在二极管处于单向导通状态的情况下,基于第一电容和第二电容内的第一电压为服务器反向供电。
具体地,当输入母线上的电压等于第一电压阈值时,表征输入母线上的电压处于低压状态。第二电压阈值可以理解为是储能电容处于饱和状态时的最大电压值。当第二电压等于第二电压阈值时,则可以确定储能电容当前处于饱和状态。因此,为预防输入母线上的电压逐渐降低,则控制第三开关管处于断开状态,以在二极管处于单向导通状态的情况下,基于第一电容和第二电容内的第一电压为服务器反向供电,以平滑输入母线上的电压,进而保障服务器的负载供电正常。
在一些可选的实施场景中,当输入母线上的电压等于第一电压阈值时,基于第一储能电路中的多个电容内的第一电压和第三储能电路中的储能电容内的第二电压为服务器反向供电的过程可以如下:当输入母
线上的电压小于第一电压阈值、输入母线上的电压大于第三电压阈值、且第二电压等于第二电压阈值时,则控制第三开关管处于断开状态持续至第一时长后,控制第三储能电路中的第二开关管处于导通状态,并在第二储能电路中的第一开关管处于断开状态以及二极管处于单向导通状态时,控制多个电容与储能电容并联,由第一电压和第二电压为服务器反向供电。
具体地,第三电压阈值可以理解为是多个电容处于欠压状态时的最小电压值。当输入母线上的电压小于第一电压阈值、输入母线上的电压大于第三电压阈值、且第二电压等于第二电压阈值时,则表征输入母线上的电压逐渐减少,但多个电容内的第一电压还未达到欠压状态。因此,为减少输入母线上的浪涌电流,能够满足为服务器提供掉电保持时间的需求的同时,能够保障服务器的安全,则控制第三开关管处于断开状态持续至第一时长后,控制第三储能电路中的第二开关管处于导通状态,并在第二储能电路中的第一开关管处于断开状态以及二极管处于单向导通状态时,由第一电压和第二电压共同为服务器反向供电。此时,多个电容和储能电容并联。
在另一些可选的实施例中,掉电保持电路还包括:限流电阻和第四开关管;限流电阻一端设置于第二开关管与储能电容之间;第四开关管串联于限流电阻另一端与二极管的负极之间。
在一些可选的实施场景中,当输入母线上的电压小于第一电压阈值时,基于第一储能电路中的多个电容内的第一电压和第三储能电路中的储能电容内的第二电压为服务器反向供电的过程可以如下:
当输入母线上的电压等于第三电压阈值,第二电压小于第二电压阈值且第二电压大于第四电压阈值时,则继续控制多个电容与储能电容并联,由第一电压和第二电压为服务器反向供电。第四电压阈值可以理解为是储能电容处于欠压状态时的最小电压值。当输入母线上的电压等于第三电压阈值,第二电压小于第二电压阈值且第二电压大于第四电压阈值时,表征多个电容处于欠压状态,自身电压不足,但储能电容内的电压较为充足,因此,继续控制多个电容与储能电容并联,由第一电压和第二电压为服务器反向供电。
当输入母线上的电压等于第三电压阈值且第二电压等于第四电压阈值时,则控制第二开关管处于断开状态,并在第二开关管处于断开状态持续至第二时长后,控制第四开关管处于导通状态,并在第一开关管和第三开关管均处于断开状态、以及二极管处于单向导通状态时,控制多个电容和储能电容串联,由第一电压和第二电压为服务器反向供电。当输入母线上的电压等于第三电压阈值且第二电压等于第四电压阈值时,表征多个电容和储能电容均处于欠压状态,因此,为最大限度的利用多个电容和储能电容内的电压,则控制第二开关管处于断开状态,并在第二开关管处于断开状态持续至第二时长后,控制第四开关管处于导通状态,并在第一开关管和第三开关管均处于断开状态、以及二极管处于单向导通状态时,控制多个电容和储能电容串联,由第一电压和第二电压为服务器反向供电,从而尽可能的释放多个电容和储能电容存储的电能,以延长掉电保持时间。
在本实施例中提供了一种供电保护方法,执行主体可以为服务器或者部署于服务器内部的BMC等,图6是根据本申请实施例的供电保护方法的流程图,如图6所示,该流程包括如下步骤:
步骤S601,检测服务器输入母线上的电压。详细说明参见上述实施例对应步骤的相关描述,此处不再赘述。
步骤S602,当输入母线上的电压小于或者等于第一电压阈值时,基于第一储能电路中的多个电容内的第一电压为服务器反向供电,和/或第三储能电路中的储能电容内的第二电压为服务器反向供电。详细说明参见上述实施例对应步骤的相关描述,此处不再赘述。
步骤S603,若输入母线上的电压大于第一电压阈值,则控制第一储能单元中的第三开关管处于导通状态,以控制多个电容根据电压储能。
在本申请实施例中,当输入母线上的电压大于第一电压阈值,则表征当前处于为服务器供电的状态,因此,控制第一储能单元中的第三开关管处于导通状态,以控制多个电容根据输入母线上的电压储能,以便后续当输入电压出现异常跌落或发生故障时,能够利用多个电容存储的电能为服务器的负载供电,以及
平滑利用多个电容通过输入母线为服务器供电时输入母线上的电压。
步骤S604,当第三开关管处于导通状态持续到第三时长后,控制第二储能电路中的第一开关管处于导通状态,以控制第二储能电路中的电感为储能电容储能。
在本申请实施例中,当第三开关管处于导通状态持续到第三时长后,输入母线能够为服务器稳定供电,进而在第三开关管处于导通的状态下,控制第二储能电路中的第一开关管处于导通状态,以控制第二储能电路中的电感为储能电容储能。其中,电感用于储能,以将母线上的电压升压至目标电压。
在一些可选的实施方式中,可以采用下述方式控制第二储能电路为储能电容储能:控制第一开关管和第三储能电路中的第二开关管按照指定占空比周期交替导通,以供电感为储能电容充电,进而有助于平衡第二储能电路和第三储能电路存储能量,避免电能被过度损耗的情况发生,且有助于保障掉电保持电路的稳定性。
本实施例提供的供电保护方法,在服务器输入母线上的电压处于正常状态时,分别控制掉电保持电路中的第一储能电路或第三储能电路储能;当输入母线上的电压出现异常跌落或发生故障时,能够平滑输入母线波动电压,从而能够满足为服务器提供掉电保持时间的需求的同时,能够保障服务器的安全。
在一些可选的实施方式中,供电保护方法还包括:
步骤S605,检测储能电容内第二电压是否等于第二电压阈值。
在本申请实施例中,检测储能电容内第二电压是否等于第二电压阈值,是用于检测储能电容在储能的过程中是否达到饱和状态。
步骤S606,若第二电压等于第二电压阈值,则控制第二开关管持续处于导通状态,并控制第一开关管持续处于断开状态,以在第一储能电路的二极管处于单向导通状态时,储能电容处于放电状态。
在本申请实施例中,利用储能电容内阻大自放电慢的特点,控制第二储能电路可以长时间进入待机关断自放电状态,进而以避免储能电容持续处于储能状态,从而可实现降低电源整体轻载功耗,同时减少因增加高频电路导致的电源电磁干扰问题。
步骤S607,当第二电压等于第五电压阈值时,控制第一开关管处于导通状态,控制第二开关管持续处于断开状态,以控制第二储能电路中的电感继续为储能电容供电。
在本申请实施例中,第五电压阈值可以理解为是储能电容的过压最小值。在储能电容放电的过程中,当第二电压等于第五电压阈值时,则储能电容的电压已达临界值,为避免反向供电不及时,且避免充电时间过长,则控制第一开关管处于导通状态,并控制第二开关管持续处于断开状态,以控制第二储能电路中的电感继续为储能电容供电。
在该实施例提供的供电保护方法,能够满足为服务器提供掉电保持时间的需求的同时,避免电能被过度损耗,从而有助于保障掉电保持电路的稳定性。
在一些可选的实施方式中,电感为储能限流线圈;第二储能电路还包括:磁激饱和控制模块、激磁饱和线圈以及磁芯;储能限流线圈、磁芯以及激磁饱和线圈构成耦合电感;磁激饱和控制模块,用于控制激磁饱和线圈中的电流,电流用于控制储能限流线圈处于限流状态或者控制储能限流线圈处于饱和状态,进而能够降低对电感的电感量要求,便于与电感限流所需电感量的融合设计;同时长时间进入关断自放电状态可实现第二储能电路降低电源整体轻载功耗,并减少因增加高频电路导致的电源电磁干扰问题,从而有助增强服务器的稳定性。
具体地,在第二开关管处于导通状态且第三开关管处于断开状态时,储能限流线圈用于在限流状态下为储能电容充电;当第二开关管处于导通状态、第三开关管处于断开状态以及二极管处于单向导通状态下,储能电容在储能限流线圈处于饱和状态时为服务器反向供电。
基于相同发明构思,本申请还提供一种供电控制电路,供电控制电路用于控制上述掉电保持电路为服务器反向供电。如图7所示,供电控制电路包括:
第一驱动电路710,包括第一电源711、第一切换开关712、第二切换开关713、第三开关管的第一控
制驱动单元714、第一延时单元715以及第二开关管的第二控制驱动单元716,第一电源711、第一切换开关712、第二切换开关713、第一延时单元715以及第二控制驱动单元716依次串联,第一控制驱动单元714连接在第二切换开关713与第一延时单元715之间,第一电源711用于为第一驱动电路710供电,第一控制驱动单元714用于控制第三开关管处于导通状态,或第一控制驱动单元714用于控制第三开关管处于断开状态,第二控制驱动单元716用于控制第二开关管处于导通状态。
在本申请实施例中,第一驱动电路710用于控制多个电容和储能电容是否采用并联的方式为服务器反向供电。
输入电压检测单元720,与输入母线连接,用于检测输入母线上的电压。
在本申请实施例中,为确定输入母线上的电压是否发生异常,则可以通过输入电压检测单元720进行检测。
输入电压判断单元730,输入电压判断单元730的第一端与输入电压检测单元连接,输入电压判断单元730的第二端与第二切换开关713连接,输入电压判断单元730用于比较第一储能电路中的多个电容内的第一电压与第一电压阈值之间的大小,以及用于根据第一比较结果控制第二切换开关713处于导通状态或断开状态,第一比较结果为第一电压与第一电压阈值之间的比较结果。
在本申请实施例中,输入电压判断单元730用于根据第一电压与第一电压阈值之间的大小控制第二切换开关713处于导通状态还是断开状态,进而决定第一控制电路是否能够处于通路状态。
电容电压检测单元740,与第三储能电路中的储能电容连接,电容电压检测单元740用于检测储能电容内的第二电压。
在本申请实施例中,通过电容电压检测单元740可以检测储能电容是否达到饱和状态。
电容电压判断单元750,电容电压判断单元750的第一端与电容电压检测单元740连接,电容电压判断单元750的第二端与第一切换开关712连接,电容电压判断单元750,用于比较第二电压与第二电压阈值之间的大小,以及用于根据第二比较结果控制第一切换开关712处于导通状态,或者控制第一切换开关712处于断开状态;第二比较结果为第二电压与第二电压阈值之间的比较结果。
在本申请实施例中,电容电压判断单元750用于根据第二电压与第二电压阈值之间的大小控制第一切换开关712处于导通状态还是断开状态,进而与第二切换开关713共同决定第一驱动电路710是否能够处于通路状态。
在本申请提供的供电控制电路,当输入母线上的电压发生异常跌落或出现故障时,可以采用硬件控制的方式,及时为服务器提供掉电保护时间,进而达到掉电保持的目的。
图8所示,供电控制电路还包括:第二驱动电路760。第二驱动电路760,包括第二电源761、第三切换开关762、第四切换开关763、第二控制驱动单元716、第二延时单元764以及第四开关管的第三控制驱动单元765,第二电源761、第三切换开关762、第四切换开关763、第二延时单元764以及第三控制驱动单元765依次串联,第二控制驱动单元716连接在第三切换开关762与第二延时单元764之间,第二电源761用于为第二驱动电路760供电,第二控制驱动单元716还用于控制第二开关管处于断开状态,第三控制驱动单元765用于控制第四开关管处于导通状态。
在本申请实施例中,第二驱动电路760用于控制多个电容和储能电容是否采用串联的方式为服务器反向供电。
输入电压判断单元730的第二端还与第四切换开关763连接,输入电压判断单元730还用于根据第一比较结果控制第四切换开关763处于导通状态,或者控制第四切换开关763处于断开状态。
在本申请实施例中,输入电压判断单元730可以根据第一电压与第一电压阈值之间的大小,分别控制第二切换开关713和第四切换开关763的通断状态,进而达到对第三开关管和第二开关管进行分开控制的目的。
电容电压判断单元750的第二端还与第三切换开关762连接,电容电压判断单元750还用于根据第二
比较结果控制第三切换开关762处于导通状态,或者控制第三切换开关762处于断开状态。
在本申请实施例中,输入电压判断单元730可以根据第二电压与第二电压阈值之间的大小,分别控制第一切换开关712和第三切换开关762的通断状态,进而达到对第二开关管和第四开关管进行分开控制的目的。
在一些可选的实施场景中,输入电压判断单元730在第一比较结果为第一电压大于第一电压阈值时,控制第二切换开关713处于导通状态,以将第一控制信号发送至第二控制驱动单元716,由第二控制驱动单元716根据第一控制信号控制第三开关管处于导通状态;
输入电压判断单元730在第一比较结果为第一电压等于第一电压阈值时,控制第二切换开关713处于导通状态,以将第二控制信号发送至第二控制驱动单元716,由第二控制驱动单元716根据第二控制信号控制第三开关管处于断开状态;
输入电压判断单元730在第一比较结果为第一电压小于第一电压阈值且第一电压大于第三电压阈值时,控制第二切换开关713处于断开状态,以保持第三开关管处于断开状态;
输入电压判断单元730在第一比较结果为第一电压等于第三电压阈值时,控制第四切换开关763处于导通状态,以将第三控制信号发送至第二控制驱动单元,第三控制信号用于控制第二开关管处于断开状态。
在另一些可选的实施场景中,电容电压判断单元750在第二比较结果为第二电压等于第二电压阈值时,控制第一切换开关712处于导通状态,以通过第一延时单元715将第四控制信号发送至第二控制驱动单元716,由第二控制驱动单元716根据第四控制信号控制第二开关管处于导通状态,第一延时单元715用于将第四控制信号延时第一时长后发送至第二控制驱动单元;
电容电压判断单元750在第二比较结果为第二电压小于第一电压阈值,且第二电压大于第四电压阈值时,控制第一切换开关712处于导通状态,由第二控制驱动单元716根据第四控制信号持续控制第二开关管处于导通状态;
电容电压判断单元750在第二比较结果为第二电压小于等于第四电压阈值时,控制第一切换开关712处于断开状态,以停止向第二控制驱动单元716发送第四控制信号,并控制第三切换开关762处于导通状态,以通过第二延时单元764将第五控制信号发送至第三控制驱动单元765,第五控制信号用于控制第三切换开关762处于导通状态,第二延时单元764用于将第五控制信号延时第二时长后发送至第三控制驱动单元765。
在本申请提供的供电控制电路,通过电压比较的方式,有助于快速确定多个电容和储能电容内的电压状态,进而有助于及时切换电路,平滑输入母线波动电压,从而延长掉电保护时长。
在又一些可选的实施场景中,第一切换开关712和第二切换开关713均处于导通状态时,第一驱动电路710处于通路状态;第三切换开关762和第四切换开关763均处于导通状态时,第二驱动电路760处于通路状态。第一驱动电路710和第二驱动电路760均处于通路状态为互斥事件。即,当第一驱动电路710处于通路状态时,第二驱动电路760一定处于断开状态;但当第一驱动电路710处于断路状态时,第二驱动电路760不一定处于断开状态。当第二驱动电路760处于通路状态时,第一驱动电路710一定处于断开状态;但当第二驱动电路760处于断路状态时,第一驱动电路710不一定处于断开状态,进而能够结合第一电压和第二电压的状态,对掉电保持电路进行针对性控制,从而合理利用第一电压和第二电压,能够有效的延长掉电保护时长,以使服务器能够达到掉电保持的目的。
在又一些可选的实施场景中,第三开关管和第二开关管均处于导通状态,且第二储能电路中的第一开关管和第四开关管均处于断开状态时,多个电容与储能电容并联;
第二开关管和第四开关管均处于导通状态,且第一开关管和第三开关管均处于断开状态时,多个电容与储能电容串联。
采用上述供电控制电路控制掉电保持电路为服务器反向供电,有助于缩短控制时间,实现快速切换、
迅速响应负载侧的用电需求,进而有助于提高效率,从而能够保障服务器需要充足掉电保护时间的需求。
在又一些可选的实施场景中,图4所示的掉电保持电路和结合图8所示的供电控制电路,控制掉电保持电路为服务器反向供电的工作时序可以如图9所示:
1)、输入电压判断单元判断输入母线上的电压是否跌落至第一电压阈值。当输入母线上的电压跌落到第一电压阈值时,控制第二切换开关713处于导通状态,进而将第二控制信号发送至第二控制驱动单元716,以由第二控制驱动单元716根据第二控制信号控制第三开关管Q1处于断开状态。
2)、同时电容电压判断单元750判断储能电容的第二电压等于达到第二电压阈值,当检测储能电容等于第二电压阈值时,则控制第一切换开关712处于导通状态,进而将第四控制信号通过第一延时单元发送至第二开关管Q4,以在第三开关管Q1处于断开状态持续第一时长后,控制第二开关管Q4处于导通状态,并通过磁激饱和控制模块40控制激磁饱和线圈L2中的电流,以控制储能限流线圈L1处于饱和状态。此时,第一切换开关712和第二切换开关713均处于导通状态,进而可以达到将多个电容11与储能电容C3并联,在二极管D1处于单向导通的状态下,为服务器反向供电的目的。
3)、在多个电容11和储能电容C3放电的过程中,输入电压检测单元720检测第一电压是否达到第三电压阈值,电容电压检测单元740检测第二电压是否达到第四电压阈值。若第一电压未达到第三电压阈值和/或第二电压未达到第四电压阈值,则持续保持多个电容11与储能电容C3并联的状态,在二极管D1处于单向导通的状态下,持续为服务器反向供电。由于输入母线上的电压处于掉电状态时放电通路一直存在,进而可降低对储能电容瞬间切入的时间要求,确保切换状态的可靠性。
4)、当输入电压检测单元720检测第一电压达到第三电压阈值,且电容电压检测单元740检测第二电压达到第四电压阈值时,输入电压检测单元720控制第四切换开关763处于导通状态,进而将第三控制信号发送至第二控制驱动单元716,以由第二控制驱动单元716控制第二开关管Q4处于断开状态;电容电压检测单元740控制第一切换开关712处于断开状态,以停止向第二控制驱动单元716发送第四控制信号,进而保障第二开关管Q4处于断开状态。电容电压检测单元740还用于控制第三切换开关762处于导通状态,以通过第二延时单元764将第五控制信号发送至第三控制驱动单元765,由第三控制驱动单元765在第二开关管Q4处于断开状态持续第二时长后,控制第三切换开关762处于导通状态,从而达到将多个电容11和储能电容C3串联,在二极管处于单向导通的状态下,为服务器反向供电的目的,以充分利用多个电容11和储能电容C3中的电能,延长为服务器提供掉电保持时间的时长。并且,当储能电容C3与多个电容11串联释放能量的过程中,可以在将服务器的供电电路切换成掉电保持电路为服务器供电的过程中,通过切除输入母线上的大电容,确保输入母线支路上无大容值储能电容,进而使供电电路被切换时,输入母线上的浪涌能量小,存在时间短,且限流电阻R1也具有限流作用,从而能够有效保障为服务器反向供电的安全。
在本实施例中还提供了一种供电保护装置,该装置用于实现上述实施例及优选实施方式,已经进行过说明的不再赘述。如以下所使用的,术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现,但是硬件,或者软件和硬件的组合的实现也是可能并被构想的。
本实施例提供一种供电保护装置,如图10所示,包括:
第一检测模块1001,用于检测服务器输入母线上的电压信号;
第一控制模块1002,用于当输入母线上的电压小于或者等于第一电压阈值时,基于第一储能电路中的多个电容内的第一电压为服务器反向供电,和/或第三储能电路中的储能电容内的第二电压为服务器反向供电。
在一些可选的实施方式中,多个电容,包括第一电容和与第一电容并联的第二电容;第一储能电路还包括:第三开关管和二极管;第一电容和第三开关管依次串联于输入母线的正极和输入母线的负极之间;二级管,二极管的正极与输入母线的负极连接;第二电容串联于输入母线的正极与二极管的负极之间;
第一控制模块1002,包括:
第一控制单元,用于当输入母线上的电压等于第一电压阈值,且储能电容内的第二电压等于第二电压阈值时,控制第三开关管处于断开状态,以在二极管处于单向导通状态的情况下,基于第一电容和第二电容内的第一电压为服务器反向供电。
在一些可选的实施方式中,第一控制模块1002,还包括:
第二控制单元,用于当输入母线上的电压小于第一电压阈值、输入母线上的电压大于第三电压阈值、且第二电压等于第二电压阈值时,则控制第三开关管处于断开状态持续至第一时长后,控制第三储能电路中的第二开关管处于导通状态,并在第二储能电路中的第一开关管处于断开状态以及二极管处于单向导通状态时,控制多个电容与储能电容并联,由第一电压和第二电压为服务器反向供电。
在一些可选的实施方式中,掉电保持电路还包括:限流电阻和第四开关管;限流电阻一端设置于第二开关管与储能电容之间;第四开关管串联于限流电阻另一端与二极管的负极之间;
第一控制模块1002,还包括:
第三控制单元,用于当输入母线上的电压等于第三电压阈值,第二电压小于第二电压阈值且第二电压大于第四电压阈值时,则继续控制多个电容与储能电容并联,由第一电压和第二电压为服务器反向供电;
第四控制单元,用于当输入母线上的电压等于第三电压阈值且第二电压等于第四电压阈值时,则控制第二开关管处于断开状态,并在第二开关管处于断开状态持续至第二时长后,控制第四开关管处于导通状态,并在第一开关管和第三开关管均处于断开状态、以及二极管处于单向导通状态时,控制多个电容和储能电容串联,由第一电压和第二电压为服务器反向供电。
在一些可选的实施方式中,装置还包括:
第五控制模块,用于若输入母线上的电压大于第一电压阈值,则控制第一储能单元中的第三开关管处于导通状态,以控制多个电容根据电压储能;
第六控制模块,用于当第三开关管处于导通状态持续到第三时长后,控制第二储能电路中的第一开关管处于导通状态,以控制第二储能电路中的电感为储能电容储能,电感用于储能,以将输入母线上的电压升压至目标电压。
在一些可选的实施方式中,采用下述方式控制第二储能电路为储能电容储能:
控制第一开关管和第三储能电路中的第二开关管按照指定占空比周期交替导通,以供电感为储能电容充电。
在一些可选的实施方式中,装置还包括:
第二检测模块,用于检测储能电容内第二电压是否等于第二电压阈值;
第七控制模块,用于若第二电压等于第二电压阈值,则控制第二开关管持续处于导通状态,并控制第一开关管持续处于断开状态,以在第一储能电路的二极管处于单向导通状态时,储能电容处于放电状态;
第八控制模块,用于当第二电压等于第五电压阈值时,控制第一开关管处于导通状态,控制第二开关管持续处于断开状态,以控制第二储能电路中的电感继续为储能电容供电。
在一些可选的实施方式中,电感为储能限流线圈;第二储能电路还包括:磁激饱和控制模块、激磁饱和线圈以及磁芯;储能限流线圈、磁芯以及激磁饱和线圈构成耦合电感;磁激饱和控制模块,用于控制激磁饱和线圈中的电流,电流用于控制储能限流线圈处于限流状态或者控制储能限流线圈处于饱和状态。
在一些可选的实施方式中,在第二开关管处于导通状态且第三开关管处于断开状态时,储能限流线圈用于在限流状态下为储能电容充电;
当第二开关管处于导通状态、第三开关管处于断开状态以及二极管处于单向导通状态下,储能电容在储能限流线圈处于饱和状态时为服务器反向供电。
上述各个模块和单元的更进一步的功能描述与上述对应实施例相同,在此不再赘述。
本实施例中的供电保护装置是以功能单元的形式来呈现,这里的单元是指ASIC(Application Specific Integrated Circuit,专用集成电路)电路,执行一个或多个软件或固定程序的处理器和存储器,和/或其他可
以提供上述功能的器件。
上述各个模块和单元的更进一步的功能描述与上述对应实施例相同,在此不再赘述。
本申请实施例还提供一种服务器,具有上述图10所示的供电保护装置。
请参阅图11,图11是本申请可选实施例提供的一种服务器的结构示意图,如图11所示,该服务器包括:一个或多个处理器110、存储器120,以及用于连接各部件的接口,包括高速接口和低速接口。各个部件利用不同的总线互相通信连接,并且可以被安装在公共主板上或者根据需要以其它方式安装。处理器可以对在服务器内执行的指令进行处理,包括存储在存储器中或者存储器上以在外部输入/输出装置(诸如,耦合至接口的显示设备)上显示GUI的图形信息的指令。在一些可选的实施方式中,若需要,可以将多个处理器和/或多条总线与多个存储器和多个存储器一起使用。同样,可以连接多个服务器,各个设备提供部分必要的操作(例如,作为服务器阵列、一组刀片式服务器、或者多处理器系统)。图11中以一个处理器110为例。
处理器110可以是中央处理器,网络处理器或其组合。其中,处理器110还可以进一步包括硬件芯片。上述硬件芯片可以是专用集成电路,可编程逻辑器件或其组合。上述可编程逻辑器件可以是复杂可编程逻辑器件,现场可编程逻辑门阵列,通用阵列逻辑或其任意组合。
其中,存储器120存储有可由至少一个处理器110执行的指令,以使至少一个处理器110执行实现上述实施例示出的方法。
存储器120可以包括存储程序区和存储数据区,其中,存储程序区可存储操作系统、至少一个功能所需要的应用程序;存储数据区可存储根据服务器的使用所创建的数据等。此外,存储器120可以包括高速随机存取存储器,还可以包括非瞬时存储器,例如至少一个磁盘存储器件、闪存器件、或其他非瞬时固态存储器件。在一些可选的实施方式中,存储器120可选包括相对于处理器110远程设置的存储器,这些远程存储器可以通过网络连接至该服务器。上述网络的实例包括但不限于互联网、企业内部网、局域网、移动通信网及其组合。
存储器120可以包括易失性存储器,例如,随机存取存储器;存储器也可以包括非易失性存储器,例如,快闪存储器,硬盘或固态硬盘;存储器120还可以包括上述种类的存储器的组合。
该服务器还包括输入装置130和输出装置140。处理器110、存储器120、输入装置130和输出装置140可以通过总线或者其他方式连接,图11中以通过总线连接为例。
输入装置130可接收输入的数字或字符信息,以及产生与该服务器的用户设置以及功能控制有关的键信号输入,例如触摸屏、小键盘、鼠标、轨迹板、触摸板、指示杆、一个或者多个鼠标按钮、轨迹球、操纵杆等。输出装置140可以包括显示设备、辅助照明装置(例如,LED)和触觉反馈装置(例如,振动电机)等。上述显示设备包括但不限于液晶显示器,发光二极管,显示器和等离子体显示器。在一些可选的实施方式中,显示设备可以是触摸屏。
本申请实施例还提供了一种非易失性计算机可读存储介质1201,上述根据本申请实施例的方法可在硬件、固件中实现,或者被实现为可记录在存储介质,或者被实现通过网络下载的原始存储在远程存储介质或非暂时机器可读存储介质中并将被存储在本地存储介质中的计算机指令1202,从而在此描述的方法可被存储在使用通用计算机、专用处理器或者可编程或专用硬件的存储介质上的这样的软件处理。其中,存储介质可为磁碟、光盘、只读存储记忆体、随机存储记忆体、快闪存储器、硬盘或固态硬盘等;进一步地,存储介质还可以包括上述种类的存储器的组合。可以理解,计算机、处理器、微处理器控制器或可编程硬件包括可存储或接收软件或计算机指令的存储组件,当软件或计算机指令被计算机、处理器或硬件访问且执行时,实现上述实施例示出的方法。
虽然结合附图描述了本申请的实施例,但是本领域技术人员可以在不脱离本申请的精神和范围的情况下做出各种修改和变型,这样的修改和变型均落入由所附权利要求所限定的范围之内。
Claims (26)
- 一种掉电保持电路,其特征在于,所述掉电保持电路包括:第一储能电路,包括多个并联连接的多个电容,所述多个电容用于根据服务器的输入母线电压储能,以及用于为所述服务器反向供电;第二储能电路,包括电感和第一开关管,所述电感和所述第一开关管依次串联于所述输入母线正极与所述输入母线负极之间,所述电感用于储能,以将所述电压升压至目标电压;以及第三储能电路,包括第二开关管和储能电容,所述第二开关管和所述储能电容依次串联于所述电感与所述输入母线负极之间,所述电感用于为所述储能电容充电,所述储能电容为所述服务器反向供电。
- 根据权利要求1所述的掉电保持电路,其特征在于,所述多个电容,包括第一电容和与所述第一电容并联的第二电容;所述第一储能电路还包括:第三开关管和二极管;所述第一电容和所述第三开关管依次串联于所述输入母线的正极和所述输入母线的负极之间;二级管,所述二极管的正极与所述输入母线的负极连接;以及所述第二电容串联于所述输入母线的正极与所述二极管的负极之间。
- 根据权利要求2所述的掉电保持电路,其特征在于,所述第一电容和所述第二电容,用于在所述第三开关管处于导通状态时,根据服务器的输入母线电压储能;以及所述第一电容和所述第二电容,还用于在所述第三开关管处于断开状态且所述二极管处于单向导通状态时,为所述服务器反向供电。
- 根据权利要求3所述的掉电保持电路,其特征在于,所述第三开关管处于导通状态时,所述第一开关管与所述第二开关管按照指定占空比周期交替导通,以供所述电感为所述储能电容充电。
- 根据权利要求2所述的掉电保持电路,其特征在于,所述掉电保持电路还包括:限流电阻和第四开关管;所述限流电阻一端设置于所述第二开关管与所述储能电容之间;以及所述第四开关管串联于所述限流电阻另一端与所述二极管的负极之间。
- 根据权利要求5所述的掉电保持电路,其特征在于,在所述第二开关管处于导通状态、所述第一开关管、所述第三开关管以及所述第四开关管均处于断开状态时,所述储能电容与所述多个电容并联,为所述服务器反向供电;以及在所述第一开关管、第二开关管以及所述第三开关管均处于断开状态、所述第四开关管处于导通状态且所述二极管处于单向导通状态时,所述储能电容与所述多个电容串联,为所述服务器反向供电。
- 根据权利要求2至4中任一项所述的掉电保持电路,其特征在于,所述电感为储能限流线圈;所述第二储能电路还包括:磁激饱和控制模块、激磁饱和线圈以及磁芯;所述储能限流线圈、所述磁芯以及所述激磁饱和线圈构成耦合电感;以及所述磁激饱和控制模块,用于控制所述激磁饱和线圈中的电流,所述电流用于控制所述储能限流线圈处于限流状态或者控制所述储能限流线圈处于饱和状态。
- 根据权利要求7所述的掉电保持电路,其特征在于,在所述第二开关管处于导通状态且所述第三开关管处于断开状态时,所述储能限流线圈用于在限流状态下为所述储能电容充电;以及在所述第二开关管处于导通状态、所述第三开关管处于断开状态以及所述二极管处于单向导通状态下,所述储能电容用于在所述储能限流线圈处于饱和状态时为所述服务器反向供电。
- 一种供电保护方法,其特征在于,应用于权利要求1至8中任一项所述的掉电保持电路,所述 方法包括:检测服务器输入母线上的电压;以及当所述输入母线上的电压小于或者等于第一电压阈值时,基于第一储能电路中的多个电容内的第一电压为服务器反向供电,和/或第三储能电路中的储能电容内的第二电压为服务器反向供电。
- 根据权利要求9所述的方法,其特征在于,所述多个电容,包括第一电容和与所述第一电容并联的第二电容;所述第一储能电路还包括:第三开关管和二极管;所述第一电容和所述第三开关管依次串联于所述输入母线的正极和所述输入母线的负极之间;二级管,所述二极管的正极与所述输入母线的负极连接;所述第二电容串联于所述输入母线的正极与所述二极管的负极之间;所述当所述输入母线上的电压等于第一电压阈值时,基于第一储能电路中的多个电容内的第一电压为服务器反向供电,包括:当所述输入母线上的电压等于所述第一电压阈值,且所述储能电容内的第二电压等于第二电压阈值时,控制所述第三开关管处于断开状态,以在所述二极管处于单向导通状态的情况下,基于所述第一电容和所述第二电容内的第一电压为所述服务器反向供电。
- 根据权利要求10所述的方法,其特征在于,当所述输入母线上的电压小于第一电压阈值时,基于第一储能电路中的多个电容内的第一电压和第三储能电路中的储能电容内的第二电压为服务器反向供电,包括:当所述输入母线上的电压小于所述第一电压阈值、所述输入母线上的电压大于第三电压阈值、且所述第二电压等于所述第二电压阈值时,则控制所述第三开关管处于断开状态持续至第一时长后,控制所述第三储能电路中的第二开关管处于导通状态,并在第二储能电路中的第一开关管处于断开状态以及所述二极管处于单向导通状态时,控制所述多个电容与所述储能电容并联,由所述第一电压和所述第二电压为所述服务器反向供电。
- 根据权利要求11所述的方法,其特征在于,所述掉电保持电路还包括:限流电阻和第四开关管;所述限流电阻一端设置于所述第二开关管与所述储能电容之间;所述第四开关管串联于所述限流电阻另一端与所述二极管的负极之间;当所述输入母线上的电压小于第一电压阈值时,基于第一储能电路中的多个电容内的第一电压和第三储能电路中的储能电容内的第二电压为服务器反向供电,包括:当所述输入母线上的电压等于所述第三电压阈值,所述第二电压小于所述第二电压阈值且所述第二电压大于第四电压阈值时,则继续控制所述多个电容与所述储能电容并联,由所述第一电压和所述第二电压为所述服务器反向供电;以及当所述输入母线上的电压等于所述第三电压阈值且所述第二电压等于所述第四电压阈值时,则控制所述第二开关管处于断开状态,并在所述第二开关管处于断开状态持续至第二时长后,控制所述第四开关管处于导通状态,并在所述第一开关管和所述第三开关管均处于断开状态、以及所述二极管处于单向导通状态时,控制所述多个电容和所述储能电容串联,由所述第一电压和所述第二电压为所述服务器反向供电。
- 根据权利要求9所述的方法,其特征在于,所述方法还包括:响应于所述输入母线上的电压大于所述第一电压阈值,控制所述第一储能单元中的第三开关管处于导通状态,以控制所述多个电容根据所述电压储能;以及在所述第三开关管处于导通状态持续到第三时长后,控制第二储能电路中的第一开关管处于导通状态,以控制所述第二储能电路中的电感为所述储能电容储能,所述电感用于储能,以将所述输入母线上的电压升压至目标电压。
- 根据权利要求13所述的方法,其特征在于,所述控制所述第二储能电路为所述储能电容储 能,包括:控制所述第一开关管和所述第三储能电路中的第二开关管按照指定占空比周期交替导通,以供所述电感为所述储能电容充电。
- 根据权利要求14所述的方法,其特征在于,所述方法还包括:检测所述储能电容内所述第二电压是否等于所述第二电压阈值;响应于所述第二电压等于所述第二电压阈值,控制所述第二开关管持续处于导通状态,并控制所述第一开关管持续处于断开状态,以在第一储能电路的二极管处于单向导通状态时,所述储能电容处于放电状态;以及在所述第二电压等于第五电压阈值时,控制所述第一开关管处于导通状态,控制所述第二开关管持续处于断开状态,以控制所述第二储能电路中的电感继续为所述储能电容供电。
- 根据权利要求15所述的方法,其特征在于,所述电感为储能限流线圈;第二储能电路还包括:磁激饱和控制模块、激磁饱和线圈以及磁芯;所述储能限流线圈、所述磁芯以及所述激磁饱和线圈构成耦合电感;所述磁激饱和控制模块,用于控制所述激磁饱和线圈中的电流,所述电流用于控制所述储能限流线圈处于限流状态或者控制所述储能限流线圈处于饱和状态。
- 根据权利要求16所述的方法,其特征在于,在所述第二开关管处于导通状态且所述第三开关管处于断开状态时,所述储能限流线圈用于在限流状态下为所述储能电容充电;以及在所述第二开关管处于导通状态、所述第三开关管处于断开状态以及所述二极管处于单向导通状态下,所述储能电容在所述储能限流线圈处于饱和状态时为所述服务器反向供电。
- 一种供电控制电路,其特征在于,所述供电控制电路用于控制掉电保持电路为服务器反向供电,所述掉电保持电路为权利要求2至8中任一项所述的掉电保持电路,所述供电控制电路包括:第一驱动电路,包括第一电源、第一切换开关、第二切换开关、第三开关管的第一控制驱动单元、第一延时单元以及第二开关管的第二控制驱动单元,所述第一电源、所述第一切换开关、所述第二切换开关、所述第一延时单元以及所述第二控制驱动单元依次串联,所述第一控制驱动单元连接在所述第二切换开关与所述第一延时单元之间,所述第一电源用于为所述第一驱动电路供电,所述第一控制驱动单元用于控制所述第三开关管处于导通状态或断开状态,所述第二控制驱动单元用于控制所述第二开关管处于导通状态;输入电压检测单元,与输入母线连接,用于检测所述输入母线上的电压;输入电压判断单元,所述输入电压判断单元的第一端与所述输入电压检测单元连接,所述输入电压判断单元的第二端与所述第二切换开关连接,所述输入电压判断单元用于比较第一储能电路中的多个电容内的第一电压与第一电压阈值之间的大小,以及用于根据第一比较结果控制所述第二切换开关处于导通状态,或者控制所述第二切换开关处于断开状态,所述第一比较结果为所述第一电压与所述第一电压阈值之间的比较结果;电容电压检测单元,与第三储能电路中的储能电容连接,所述电容电压检测单元用于检测所述储能电容内的第二电压;以及电容电压判断单元,所述电容电压判断单元的第一端与所述电容电压检测单元连接,所述电容电压判断单元的第二端与所述第二切换开关连接,所述电容电压判断单元,用于比较所述第二电压与第二电压阈值之间的大小,以及用于根据第二比较结果控制所述第一切换开关处于导通状态,或者控制所述第一切换开关处于断开状态;所述第二比较结果为所述第二电压与所述第二电压阈值之间的比较结果。
- 根据权利要求18所述的供电控制电路,其特征在于,所述供电控制电路还包括:第二驱动电路,包括第二电源、第三切换开关、第四切换开关、所述第二控制驱动单元、第二延时 单元以及第四开关管的第三控制驱动单元,所述第二电源、所述第三切换开关、所述第四切换开关、所述第二延时单元以及所述第三控制驱动单元依次串联,所述第二控制驱动单元连接在所述第三切换开关与所述第二延时单元之间,所述第二电源用于为所述第二驱动电路供电,所述第二控制驱动单元还用于控制所述第二开关管处于断开状态,第三控制驱动单元用于控制所述第四开关管处于导通状态;所述输入电压判断单元的第二端还与所述第四切换开关连接,所述输入电压判断单元还用于根据所述第一比较结果控制所述第四切换开关处于导通状态,或者控制所述第四切换开关处于断开状态;以及所述电容电压判断单元的第二端还与所述第三切换开关连接,所述电容电压判断单元还用于根据所述第二比较结果控制所述第四切换开关处于导通状态,或者控制所述第四切换开关处于断开状态。
- 根据权利要求19所述的供电控制电路,其特征在于,所述输入电压判断单元在所述第一比较结果为所述第一电压大于所述第一电压阈值时,控制所述第二切换开关处于导通状态,以将第一控制信号发送至所述第二控制驱动单元,由所述第二控制驱动单元根据所述第一控制信号控制所述第三开关管处于导通状态;所述输入电压判断单元在所述第一比较结果为所述第一电压等于所述第一电压阈值时,控制所述第二切换开关处于导通状态,以将第二控制信号发送至所述第二控制驱动单元,由所述第二控制驱动单元根据第二控制信号控制所述第三开关管处于断开状态;所述输入电压判断单元在所述第一比较结果为所述第一电压小于所述第一电压阈值且所述第一电压大于第三电压阈值时,控制所述第二切换开关处于断开状态,以保持所述第三开关管处于断开状态;以及所述输入电压判断单元在所述第一比较结果为所述第一电压等于所述第三电压阈值时,控制所述第四切换开关处于导通状态,以将第三控制信号发送至所述第二控制驱动单元,所述第三控制信号用于控制所述第二开关管处于断开状态。
- 根据权利要求20所述的供电控制电路,其特征在于,所述电容电压判断单元在所述第二比较结果为所述第二电压等于所述第二电压阈值时,控制所述第一切换开关处于导通状态,以通过所述第一延时单元将第四控制信号发送至所述第二控制驱动单元,由所述第二控制驱动单元根据所述第四控制信号控制所述第二开关管处于导通状态,所述第一延时单元用于将所述第四控制信号延时第一时长后发送至所述第二控制驱动单元;所述电容电压判断单元在所述第二比较结果为所述第二电压小于所述第一电压阈值,且所述第二电压大于第四电压阈值时,控制所述第一切换开关处于导通状态,由所述第二控制驱动单元根据所述第四控制信号持续控制所述第二开关管处于导通状态;以及所述电容电压判断单元在所述第二比较结果为所述第二电压小于等于所述第四电压阈值时,控制所述第一切换开关处于断开状态,以停止向所述第一控制驱动单元发送所述第四控制信号,并控制所述第三切换开关处于导通状态,以通过所述第二延时单元将第五控制信号发送至所述第三控制驱动单元,所述第五控制信号用于控制所述第四开关管处于导通状态,所述第二延时单元用于将所述第五控制信号延时第二时长后发送至所述第三控制驱动单元。
- 根据权利要求21所述的供电控制电路,其特征在于,在所述第一切换开关和所述第二切换开关均处于导通状态时,所述第一驱动电路处于通路状态;在所述第三切换开关和所述第四切换开关均处于导通状态时,所述第二驱动电路处于通路状态。
- 根据权利要求21所述的供电控制电路,其特征在于,在所述第三开关管和所述第二开关管均处于导通状态,且第二储能电路中的第一开关管和所述第四开关管均处于断开状态时,所述多个电容与所述储能电容并联;在所述第二开关管和所述第四开关管均处于导通状态,且所述第一开关管和所述第三开关管均处于断开状态时,所述多个电容与所述储能电容串联。
- 一种供电保护装置,其特征在于,应用于权利要求1至8中任一项所述的掉电保持电路,所述装置包括:第一检测模块,用于检测服务器输入母线上的电压信号;第一控制模块,用于当所述输入母线上的电压小于或者等于第一电压阈值时,基于第一储能电路中的多个电容内的第一电压为服务器反向供电,和/或第三储能电路中的储能电容内的第二电压为服务器反向供电。
- 一种服务器,其特征在于,包括:存储器和处理器,所述存储器和所述处理器之间互相通信连接,所述存储器中存储有计算机指令,所述处理器通过执行所述计算机指令,从而执行权利要求9至17中任一项所述的供电保护方法。
- 一种非易失性计算机可读存储介质,其特征在于,所述非易失性计算机可读存储介质上存储有计算机指令,所述计算机指令用于使计算机执行权利要求9至17中任一项所述的供电保护方法。
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