WO2024149028A1 - 电源电路的控制方法及装置、非易失性可读存储介质及电子装置 - Google Patents

电源电路的控制方法及装置、非易失性可读存储介质及电子装置 Download PDF

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Publication number
WO2024149028A1
WO2024149028A1 PCT/CN2023/139592 CN2023139592W WO2024149028A1 WO 2024149028 A1 WO2024149028 A1 WO 2024149028A1 CN 2023139592 W CN2023139592 W CN 2023139592W WO 2024149028 A1 WO2024149028 A1 WO 2024149028A1
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Prior art keywords
voltage
current
target
power supply
supply circuit
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PCT/CN2023/139592
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English (en)
French (fr)
Inventor
吴名伟
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Suzhou Metabrain Intelligent Technology Co Ltd
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Suzhou Metabrain Intelligent Technology Co Ltd
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Priority to US18/876,139 priority Critical patent/US12542481B2/en
Publication of WO2024149028A1 publication Critical patent/WO2024149028A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
    • H02M1/007—Plural converter units in cascade
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/36—Means for starting or stopping converters
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208—Arrangements for improving power factor of AC input
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208—Arrangements for improving power factor of AC input
    • H02M1/4225—Arrangements for improving power factor of AC input using a non-isolated boost converter
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
    • 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
    • H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
    • H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
    • H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
    • H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33507—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Definitions

  • Embodiments of the present application relate to the field of computers, and in particular, to a control method and device for a power supply circuit, a non-volatile readable storage medium, and an electronic device.
  • Input voltage sag refers to the AC voltage drop at a given frequency (50-60Hz), which returns to normal after a short duration of half a cycle to 1 minute. Voltage sags are often caused by power supply system failures, such as starting heavy loads (such as starting large air conditioning equipment for the first time), troubleshooting remote power equipment, and starting large motors in industrial plants, which can all cause the voltage to drop significantly. In addition, power supply equipment short-circuit factors (such as: trees growing in contact with overhead cables, cable damage, or power equipment failures during excavation projects, etc.) or weather factors (such as: overhead cables tripped due to lightning strikes, etc.) may also cause voltage sags.
  • power supply equipment short-circuit factors such as: trees growing in contact with overhead cables, cable damage, or power equipment failures during excavation projects, etc.
  • weather factors such as: overhead cables tripped due to lightning strikes, etc.
  • a sudden drop in input voltage can have a significant impact on the equipment it powers.
  • a sudden drop in input voltage often affects the server's power supply, which can cause data stored in the server to be lost or even damage the server and prevent it from booting.
  • the server has been offline and the operation and maintenance personnel must replace the damaged server power supply and restart it before the server can be put back online.
  • the embodiments of the present application provide a control method and device for a power supply circuit, a non-volatile readable storage medium, and an electronic device, so as to at least solve the problem in the related art that a sudden drop in input voltage may cause damage to the device.
  • a control method for a power supply circuit comprising: detecting whether a voltage value of an input voltage of the power supply circuit decreases, wherein the power supply circuit is configured to supply power to a target device, wherein the power supply circuit comprises: an electromagnetic interference filter, a bridge rectifier and a power factor correction electrode, wherein the input end of the electromagnetic interference filter is connected to an AC power supply that provides AC power to the power supply circuit, the output end of the electromagnetic interference filter is connected to the input end of the bridge rectifier, the output end of the bridge rectifier is connected to the input end of the power factor correction electrode, the output end of the power factor correction electrode is connected to the target device, and the input voltage of the power supply circuit is the voltage of the AC power provided by the AC power supply; when a voltage value decrease of the input voltage is detected, Determine a target reduction ratio of a current voltage value after the input voltage drops relative to a normal voltage value, and a first duration of time during which the input voltage is at the current voltage value; judge whether the target
  • determining whether the target decrease ratio and the first duration satisfy a preset voltage sag determination condition includes: when the first duration is less than or equal to the first preset duration and the target decrease ratio is greater than or equal to the first preset ratio, determining that the target decrease ratio and the first duration satisfy the voltage sag determination condition; and/or when the first duration is greater than the second preset duration and the target decrease ratio is greater than or equal to the second preset ratio, determining that the target decrease ratio and the target duration satisfy the voltage sag determination condition, wherein the second preset duration is greater than the first preset duration and the second preset ratio is less than the first preset ratio.
  • the target reduction ratio and the first duration meet the voltage sag determination condition, including: during the first duration
  • the target decrease ratio is less than or equal to the first preset time duration and the target decrease ratio is greater than or equal to the first preset ratio
  • the target decrease ratio and the target duration meet the voltage sag determination condition, including: when the first duration is greater than the second preset duration and the target decrease ratio is greater than or equal to the second preset ratio, it is judged that the target decrease ratio and the target duration meet the voltage sag determination condition, wherein the voltage value of the input voltage is the voltage value of the alternating current input to the power supply circuit, the value range of the second preset duration is [one cycle of the alternating current, two cycles of the alternating current], and the value range of the second preset ratio is [20%, 40%], or [20%, 30%], or [30%, 40%].
  • determining a target reduction ratio of a current voltage value after an input voltage drop relative to a normal voltage value includes: obtaining a voltage difference between the current voltage value and the normal voltage value; and determining the target reduction ratio to be equal to a ratio of the voltage difference to the normal voltage value.
  • performing a target protection operation on a power circuit includes: adjusting a duty cycle of a control signal of an output voltage in the power circuit so that the output voltage is less than or equal to a preset target voltage value.
  • adjusting the duty cycle of a control signal of an output voltage in a power supply circuit so that the output voltage is less than or equal to a preset target voltage value includes: adjusting the duty cycle of the control signal to be less than or equal to a target duty cycle so that the output voltage is less than or equal to a preset target voltage value, wherein the target duty cycle is a duty cycle determined based on the target voltage value and the current voltage value.
  • the duty cycle of a control signal is adjusted to be less than or equal to a target duty cycle, including: inputting a target pulse width modulation signal as a drive signal to a switching device in a power supply circuit, so that the duty cycle of the control signal output by the switching device is adjusted to be less than or equal to the target duty cycle, wherein the target pulse width modulation signal is used to control the switching device to be turned on or off.
  • the method when it is determined that a voltage drop occurs in the input voltage of the power supply circuit, the method further includes: obtaining the current value of the reverse recovery current of the power supply circuit over multiple cycles of the alternating current, wherein the voltage value of the input voltage is the voltage value of the alternating current input to the power supply circuit; determining whether the current value of the reverse recovery current over multiple cycles satisfies a preset current abnormality determination condition; and determining that an abnormality occurs in the input current of the power supply circuit when the current value of the reverse recovery current over multiple cycles satisfies the current abnormality determination condition.
  • determining whether the current values of the reverse recovery current over multiple cycles satisfy preset current abnormality determination conditions includes: determining whether the current values of the reverse recovery current over N consecutive cycles of the alternating current are all less than a first preset current value, wherein N is a positive integer greater than or equal to 2, the first preset current value is A times the normal current value of the working current of the power supply circuit, A is a positive number greater than 1, and the multiple cycles include N cycles; when the current values of the reverse recovery current over N cycles are not all less than the first preset current value, determining that the current values of the reverse recovery current over multiple cycles satisfy the current abnormality determination conditions.
  • determining whether the current values of the reverse recovery current over multiple cycles meet preset current abnormality judgment conditions also includes: when the current values of the reverse recovery current over N cycles are all less than a first preset current value, determining whether the current values of the reverse recovery current over M consecutive cycles after the N cycles are all less than a second preset current value, wherein M is a positive integer greater than or equal to 2, the second preset current value is B times the normal current value of the working current of the power supply circuit, B is a positive number greater than 1, B is less than A, and the multiple cycles include N cycles and M cycles; when the current values of the reverse recovery current over M cycles are not all less than the second preset current value, determining that the current values of the reverse recovery current over multiple cycles meet the current abnormality judgment conditions.
  • judging whether the current value of the reverse recovery current over multiple cycles meets the preset current abnormality judgment condition further includes: when the current value of the reverse recovery current over M cycles is less than the second preset current value, judging whether the current value of the reverse recovery current over P consecutive cycles after M cycles is less than a third preset current value, wherein P is a positive integer greater than or equal to 2, the third preset current value is C times the normal current value of the working current of the power supply circuit, C is a positive number greater than 1, C is less than B, and multiple cycles Including N cycles, M cycles and P cycles; when the current values of the reverse recovery current in P cycles are not all less than the third preset current value, it is judged that the current values of the reverse recovery current in multiple cycles meet the current abnormality judgment condition.
  • the value range of A is [2.5, 3.5], or [2.5, 3], or [3, 3.5];
  • the value range of B is [1.5, 2.4], or [1.5, 2], or [2, 2.4];
  • the value range of C is (1, 1.4], or (1, 1.1], or [1.1, 1.4].
  • a control device for a power supply circuit comprising: an input voltage detection module, configured to obtain a voltage value of an input voltage of the power supply circuit, wherein the power supply circuit is configured to supply power to a target device; a control module, configured to determine, when a voltage value drop of the input voltage of the power supply circuit is detected, a target drop ratio of a current voltage value after the input voltage drops relative to a normal voltage value, and a target duration for which the input voltage is at the current voltage value; determine whether the target drop ratio and the target duration satisfy a preset voltage sag determination condition; when it is determined that the target drop ratio and the target duration satisfy the voltage sag determination condition, determine that a voltage sag occurs in the input voltage of the power supply circuit, and perform a target protection operation on the power supply circuit, wherein the target protection operation is used to control the output voltage provided by the power supply circuit to the target device to be less than or equal to a preset target voltage value when a voltage s
  • control module is a processing device, and the processing device is configured to determine whether the target decrease ratio and the first duration satisfy a preset voltage sag determination condition by executing the following steps: when the first duration is less than or equal to the first preset duration, and the target decrease ratio is greater than or equal to the first preset ratio, it is determined that the target decrease ratio and the first duration satisfy the voltage sag determination condition; and/or when the first duration is greater than the second preset duration, and the target decrease ratio is greater than or equal to the second preset ratio, it is determined that the target decrease ratio and the target duration satisfy the voltage sag determination condition, wherein the second preset duration is greater than the first preset duration, and the second preset ratio is less than the first preset ratio.
  • a power supply circuit wherein the power supply circuit includes a switching device, and the switching device is configured to output a control signal; wherein the control module is connected to the power supply circuit and is configured to implement a target protection operation on the power supply circuit by performing the following steps: inputting a target pulse width modulation signal as a drive signal to the switching device in the power supply circuit, so that the duty cycle of the control signal output by the switching device is adjusted to be less than or equal to the target duty cycle, wherein the target pulse width modulation signal is used to control the switching device to be turned on or off, and the duty cycle of the control signal is used to make the output voltage less than or equal to a preset Target voltage value; wherein, the power supply circuit includes: an electromagnetic interference filter, a bridge rectifier and a power factor correction pole, the input end of the electromagnetic interference filter is connected to an AC power supply that provides AC power to the power supply circuit, the output end of the electromagnetic interference filter is connected to the input end of the bridge rectifier, the output end of the
  • an input current detection module which is configured to obtain the current value of the reverse recovery current of the power supply circuit over multiple cycles of the alternating current when it is determined that the input voltage of the power supply circuit has a voltage drop, wherein the voltage value of the input voltage is the voltage value of the alternating current input to the power supply circuit; wherein the control module is also configured to determine whether the current value of the reverse recovery current over multiple cycles meets a preset current abnormality determination condition; when the current value of the reverse recovery current over multiple cycles meets the current abnormality determination condition, it is determined that the input current of the power supply circuit has an abnormality.
  • a control device for a power supply circuit comprising: a detection module, configured to detect whether a voltage value of an input voltage of the power supply circuit decreases, wherein the power supply circuit is configured to supply power to a target device, wherein the power supply circuit comprises: an electromagnetic interference filter, a bridge rectifier and a power factor correction electrode, wherein the input end of the electromagnetic interference filter is connected to an AC power supply that provides AC power to the power supply circuit, the output end of the electromagnetic interference filter is connected to the input end of the bridge rectifier, the output end of the bridge rectifier is connected to the input end of the power factor correction electrode, the output end of the power factor correction electrode is connected to the target device, and the input voltage of the power supply circuit is the voltage of the AC power provided by the AC power supply; a first determination module, configured to determine, when a voltage value decrease of the input voltage is detected, a target decrease ratio of a current voltage value after the input voltage decreases relative to a normal voltage value, and a first duration of the
  • a non-volatile readable storage medium in which a computer program is stored, wherein the computer program is configured to execute the steps of any of the above method embodiments when running.
  • an electronic device including a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.
  • the present application in the process of the power supply circuit supplying power to the device, it is possible to determine in real time whether a voltage sag has occurred based on the detected drop ratio of the input voltage of the power supply circuit and the duration of the voltage value of the input voltage of the power supply circuit after the drop, and in the case of a voltage sag, the voltage output by the power supply circuit to the device is controlled to a safe voltage value, thereby avoiding the output voltage of the power supply circuit exceeding the operating voltage range of the device when the input voltage of the power supply circuit drops, thereby causing damage to the device. Therefore, the problem that a sudden drop in input voltage may cause damage to the device can be solved, achieving the effect of reducing the damage to the device caused by a sudden drop in input voltage.
  • FIG1 is a schematic diagram of a server network architecture according to an embodiment of the present application.
  • FIG2 is a schematic diagram of an application scenario of a control method for a power supply circuit according to an embodiment of the present application
  • FIG3 is a block diagram of an active power factor correction boost circuit according to an embodiment of the present application.
  • FIG4( a ) is a waveform diagram 1 of an inductor effect of a boost circuit according to an embodiment of the present application
  • FIG4( b ) is a second waveform diagram of the inductance effect of a boost circuit according to an embodiment of the present application
  • FIG5 is a waveform diagram of a voltage drop according to an embodiment of the present application.
  • FIG6 is a schematic diagram of a burnout of a maximum capacitor according to an embodiment of the present application.
  • FIG7 is a diagram showing a measurement of an output voltage waveform of a power factor correction electrode according to an embodiment of the present application.
  • FIG8 is a schematic diagram of a burning input fuse according to an embodiment of the present application.
  • FIG9 is a waveform measurement diagram of an input current of a server power supply according to an embodiment of the present application.
  • FIG10 is a flow chart of a method for controlling a power supply circuit according to an embodiment of the present application.
  • FIG11 is a schematic diagram of a server power supply according to an embodiment of the present application.
  • FIG12 is a schematic diagram of adjusting a duty cycle according to an embodiment of the present application.
  • FIG13 is a waveform diagram of a reverse recovery current according to an embodiment of the present application.
  • FIG14 is a schematic diagram of controlling the output voltage of a power factor correction pole according to an embodiment of the present application.
  • FIG15 is a schematic diagram of the structure of a server power supply according to an embodiment of the present application.
  • FIG. 16 is a structural block diagram of a control device for a power supply circuit according to an embodiment of the present application.
  • Figure 1 is a schematic diagram of a server network architecture according to an embodiment of the present application.
  • the embodiment of the present application can run on the network architecture shown in Figure 1.
  • the network architecture includes: server 102, server 104 and server 106.
  • FIG2 is a schematic diagram of an application scenario of a power circuit control method according to an embodiment of the present application.
  • the power circuit 104 supplying power to the server 102 includes an EMI (Electromagnetic Interference) filter.
  • EMI Electromagnetic Interference
  • 106 bridge rectifier (Rectifier Bridge) 108
  • power factor correction stage PFC (Power Factor Correction) stage
  • DC-DC converter 112 Direct Current-Direct Current Converter
  • AC Alternating Current
  • F1 and F2 are input fuses.
  • the power factor correction pole 110 is the power input pole, and its main function is to make the voltage and current have the same phase and make the load close to resistance.
  • a power factor correction circuit must be installed at the power input end. According to the components used in the factor correction pole circuit, it can be divided into two types: passive and active power factor correctors. Under the best conditions, the PF (Power Factor) value of the passive power factor corrector can only reach 70%, which is not applicable under strict power factor requirements.
  • Active power factor correction poles are mostly boost circuit structures (Boost Topology).
  • FIG3 is a block diagram of an active power factor correction pole boost circuit structure according to an embodiment of the present application.
  • the active power factor correction pole boost circuit includes a bridge rectifier, an inductor L of a power factor correction pole, a diode D of a power factor correction pole, a switching device Q of a power factor correction pole (which may be but is not limited to a MOS tube (Metal-Oxide-Semiconductor Field-Effect Transistor), an output capacitor C of the power factor correction pole, and a switching device control device Q of the power factor correction pole.
  • Circuit PFC LC detection feedback circuit (Power&Feed Back Stage) and Load RL (output load) of the power factor correction pole.
  • the input voltage can be but not limited to AC90V to 265V, and the DC voltage at the Vd (output voltage of the bridge rectifier) point is 127V to 375V.
  • the output voltage Vo of the power factor correction pole is increased to 400V DC by the boost circuit.
  • Figure 4(a) is a waveform diagram of the inductance effect of a boost circuit according to an embodiment of the present application. As shown in Figure 4(a), the horizontal axis represents time t, and the vertical axis represents voltage value V.
  • Figure 4(b) is a second waveform diagram of the inductance effect of a boost circuit according to an embodiment of the present application. As shown in FIG4(b), the horizontal axis represents time t, and the vertical axis represents duty cycle D.
  • Duty cycle D can be, but is not limited to, equal to the ratio of A to (A+B).
  • FIG4(b) is a waveform diagram of the inductance effect of a boost circuit according to an embodiment of the present application. The second waveform of the inductor action of a boost circuit of the embodiment is shown in FIG4(b).
  • the inductor current ⁇ L rises with the same slope until Q is turned off, and the working cycle (D0T) ends.
  • the voltage of the inductor L is reversed and added with Vd to start discharging to the output end through the diode D.
  • the capacitor C is in a charged state, and RL maintains the output Vo, where the value of Vo is the value of the input voltage Vd plus the inductor voltage (-VL) (due to the reverse phase of the inductor voltage, -VL is a positive value).
  • the loop is shown as the solid arrow in FIG3 until Q is turned on again (that is, the (1-D0)T time period ends).
  • FIG5 is a waveform diagram of a voltage sag according to an embodiment of the present application. As shown in FIG5 , the horizontal axis represents time t, and the vertical axis represents the voltage value V of the input voltage. In the event of a voltage sag, the voltage waveform is significantly lower than that in the event of no voltage sag.
  • the main reason for the failure analysis of the damaged or unable to boot up server is that the server power supply is burned out when the input voltage sags. In detail, it may be that the maximum capacitor (Bulk Cap) of the power factor correction pole is burned out, or the input fuse (Input Fuse) is blown.
  • FIG6 is a schematic diagram of the burning of a maximum capacitor according to an embodiment of the present application. As shown in FIG6 , a sudden drop in input voltage will cause the maximum capacitor of the power factor correction pole to burn, thereby causing the server power supply to burn. In this case, the waveform of the PFC stage Bulk Cap can be analyzed to analyze the cause of the burning of the maximum capacitor.
  • FIG7 is a measurement diagram of the output voltage waveform of a power factor correction pole according to an embodiment of the present application.
  • the output voltage of the power factor correction pole i.e., the voltage of the maximum capacitor, Bulk Cap Voltage, i.e., the output voltage provided by the above-mentioned power supply circuit to the target device
  • the output voltage of the power factor correction pole i.e., the voltage of the maximum capacitor, Bulk Cap Voltage, i.e., the output voltage provided by the above-mentioned power supply circuit to the target device
  • the withstand voltage of the Bulk Cap is 450V, so the Bulk Cap will burn.
  • FIG8 is a schematic diagram of a burnout of an input fuse according to an embodiment of the present application.
  • the input voltage suddenly drops and the input fuse blows, thereby causing the power supply circuit to be unable to normally supply power to the server 102.
  • the reason why the input fuse blows can be known by analyzing the input current of the server power supply.
  • FIG9 is a waveform measurement diagram of the input current of a server power supply according to an embodiment of the present application, as shown in FIG9 .
  • the input current of the server power supply unit may exceed 300% of the normal operating current, causing the input fuse to burn out.
  • the fuse can support 200% current within 4 cycles of AC, and exceeding this will cause the input fuse to blow.
  • the control method of the power supply circuit in the embodiment of the present application can detect in real time whether the input voltage of the power supply circuit 104 has dropped, and can determine whether a voltage drop has occurred based on the detected input voltage drop ratio and duration.
  • the output voltage i.e., the voltage output by the DC-DC converter 112
  • the output voltage is controlled within a safe voltage value range, thereby avoiding the burning of the input fuse (Input Fuse) and the burning of the maximum capacitor of the power factor correction pole, thereby greatly reducing the possibility of the server power supply of the server 102 burning due to a voltage drop, and ensuring the normal operation of the server in the event of a voltage drop.
  • FIG. 10 is a flow chart of a control method for a power circuit according to an embodiment of the present application. As shown in FIG. 10 , the flow chart includes the following steps:
  • Step S1002 detecting whether the voltage value of the input voltage of the power supply circuit decreases, wherein the power supply circuit is configured to supply power to the target device, wherein the power supply circuit includes: an electromagnetic interference filter, a bridge rectifier and a power factor correction electrode, wherein the input end of the electromagnetic interference filter is connected to an AC power supply that provides AC power to the power supply circuit, the output end of the electromagnetic interference filter is connected to the input end of the bridge rectifier, the output end of the bridge rectifier is connected to the input end of the power factor correction electrode, the output end of the power factor correction electrode is connected to the target device, and the input voltage of the power supply circuit is the voltage of the AC power provided by the AC power supply;
  • Step S1004 when it is detected that the voltage value of the input voltage drops, determining a target drop ratio of the current voltage value after the input voltage drops relative to the normal voltage value, and a first duration of the input voltage being at the current voltage value;
  • Step S1006 determining whether the target drop ratio and the first duration satisfy a preset voltage drop determination condition
  • Step S1008 when it is determined that the target decrease ratio and the first duration satisfy the voltage sag determination condition, it is determined that a voltage sag occurs in the input voltage of the power supply circuit, and a target protection operation is performed on the power supply circuit, wherein the target protection operation is used to control the output voltage provided by the power supply circuit to the target device to be less than or equal to a preset target voltage value when a voltage sag occurs in the input voltage of the power supply circuit; the output voltage provided to the target device is the voltage output by the output end of the power factor correction pole.
  • the process of the power supply circuit supplying power to the device it is possible to determine in real time whether a voltage sag has occurred based on the detected drop ratio of the input voltage of the power supply circuit and the duration of the voltage value of the input voltage of the power supply circuit after the drop, and in the event of a voltage sag, the voltage output by the power supply circuit to the device is controlled to a safe voltage value, thereby avoiding the output voltage of the power supply circuit exceeding the operating voltage range of the device when the input voltage of the power supply circuit drops, thereby causing damage to the device. Therefore, the problem that a sudden drop in input voltage may cause damage to the device can be solved, achieving the effect of reducing the damage to the device caused by a sudden drop in input voltage.
  • the execution subject of the above steps may be a server, etc., but is not limited thereto.
  • step S1002 and step S1004 are interchangeable, that is, step S1004 may be executed first, and then step S1002.
  • the target device may include but is not limited to power equipment such as servers and large motors in industrial plants.
  • the target device often requires a stable voltage input during operation. It may include but is not limited to real-time detection of whether the voltage value of the input voltage of the power supply circuit decreases during the process of the power supply circuit supplying power to the target device.
  • the input voltage of the power supply circuit may be but is not limited to an AC voltage or a DC voltage, etc.
  • the AC voltage may be but is not limited to a voltage provided by an AC power
  • the DC voltage may be but is not limited to a voltage provided by a DC power, etc.
  • the normal voltage value may be, but is not limited to, a stable voltage value required by the target device during normal operation, and may be, but is not limited to, real-time detection of whether the voltage value of the input voltage of the power supply circuit decreases during the process of the power supply circuit supplying power to the target device, and, when a decrease in the voltage value of the input voltage is detected, determining the decrease ratio between the decreased voltage value and the normal voltage value, as well as the duration of the input voltage being at the decreased voltage value.
  • the input voltage of the power supply circuit when the voltage value of the input voltage is not detected to decrease, it can be indicated that the input voltage of the power supply circuit is In a stable state, in this case, it is possible but not limited to continue to detect whether the voltage value of the input voltage decreases.
  • the target decrease ratio of the current voltage value after the input voltage drops relative to the normal voltage value can be determined in the following manner but is not limited to: obtaining the voltage difference between the current voltage value and the normal voltage value; and determining the target decrease ratio to be equal to the ratio of the voltage difference to the normal voltage value.
  • the ratio of the voltage drop can be determined as, but not limited to, the ratio of the difference between the voltage value after the drop and the normal voltage value to the normal voltage value. In this way, the degree of drop of the voltage value after the drop compared to the normal voltage value can be accurately reflected.
  • step S1006 it is possible but not limited to detecting in real time whether the voltage value of the input voltage of the power supply circuit decreases during the process of the power supply circuit supplying power to the target device, and when it is detected that the voltage value of the input voltage has decreased, determining the decrease ratio of the decreased voltage value to the normal voltage value, and the duration of the input voltage being at the decreased voltage value, and judging whether the current decrease degree of the input voltage meets the judgment condition of a voltage sag based on the decrease ratio of the voltage value and the duration of the input voltage being at the decreased voltage value, thereby improving the accuracy of judging whether a voltage sag has occurred.
  • the duration and decrease ratio in the preset voltage sag determination conditions can be adjusted according to, but not limited to, the actual operating requirements of the equipment.
  • the voltage drops to below 90% of the standard value (i.e., the normal voltage value mentioned above), and then recovers to above 90%.
  • the duration of the voltage value is 10ms to 60s, and a voltage sag can be considered to have occurred.
  • FIG. 11 is a schematic diagram of the framework of a server power supply according to an embodiment of the present application.
  • the above-mentioned server power supply can be but not limited to AC input (AC input), and the framework of the above-mentioned server power supply can include but not limited to input fuse (Line Fuse), electromagnetic interference filter (EMI Filter), input surge current protection circuit (Inrush Protection), full-bridge rectifier (Full Bridge Rectifier) and power factor correction pole, high-efficiency isolator and DC-DC converter (including synchronous rectification) can include but not limited to half-bridge resonant DC converter (Half Bridge LLC) and center tapped synchronous rectification (Center Tapped with SR); the main output current sharing parallel circuit includes the power output current feedback detection circuit (Current Sense) and the power parallel switch MOS tube control signal (Oring control); the standby power current sharing parallel circuit; the primary side (PRIMARY Side) MCU and the protection circuit are connected to the high side of the main transformer, the secondary side (SECONDARY Side) MCU and the protection circuit are connected to the low side of the main transformer, the signal isolation coupler
  • the input fuse can be, but is not limited to, preventing fire by fusing;
  • the anti-electromagnetic interference filter is configured to filter out electromagnetic interference and clutter;
  • the input surge current protection circuit is a startup current suppression circuit, and can be, but is not limited to, configured to suppress the startup current;
  • the full-bridge rectifier and power factor correction pole can be, but is not limited to, configured to suppress total harmonic distortion and output voltage to the power factor correction stage.
  • the primary side MCU (i.e., the above-mentioned control device) and the protection circuit can, but is not limited to, transmit signal 1 (Relay control, relay control signal) to the input surge current protection circuit, the primary side MCU receives signal 2 (Voltage and Current, input voltage and current feedback signal of the power factor correction pole) sent back by the full-bridge rectifier and power factor correction pole, the primary side MCU transmits signal 3 (Gate signal, MOS tube control signal of the switching device of the power factor correction pole) to the full-bridge rectifier and power factor correction pole, and the primary side MCU receives signal 4 (Sense1 (by the primary side MCU), output voltage and current feedback signal of the power factor correction pole).
  • signal 1 Relay control, relay control signal
  • signal 2 Voltage and Current, input voltage and current feedback signal of the power factor correction pole
  • the primary side MCU transmits signal 3 (Gate signal, MOS tube control signal of the switching device of the power factor correction pole) to the full-bridge rectifier and power factor correction pole
  • signal 4
  • the signal isolator transmits signal 5 (Gate signal, DC conversion LLC MOS tube control signal) to the half-bridge resonant DC converter, the secondary side MCU and the protection circuit, and outputs signal 6 (SR signal, synchronous rectification switch MOS tube control signal) to the center-tapped synchronous rectifier.
  • the secondary side MCU and the protection circuit receive signal 7 (Sense2 (by the secondary side MCU), LLC DC converter output voltage and current feedback signal) and signal 9 (Remote sense, output compensation feedback detection signal) output by the main output current sharing parallel circuit, and transmits signal 8 (Oring control, power parallel switch MOS tube control signal) to the main output current sharing parallel circuit.
  • MCU can also be set up for, but not limited to, converter switch control, fan control, LED (light-emitting diode) control, monitoring, protection and communication in power supply, etc., and can be divided into, but not limited to, primary side MCU and Secondary side (SECONDARY Side) MCU, wherein the primary side MCU can be but not limited to being set to the switch control, monitoring, protection, communication and FRU (Field Replace Unit) of the power factor correction pole, etc., and the secondary side MCU can be but not limited to being set to the isolated DC/DC converter switch control, fan control, LED control monitoring, protection, communication, etc.
  • primary side MCU can be but not limited to being set to the switch control, monitoring, protection, communication and FRU (Field Replace Unit) of the power factor correction pole, etc.
  • FRU Field Replace Unit
  • determining whether the target drop ratio and the first duration satisfy a preset voltage sag determination condition may include, but is not limited to, at least one of the following situations:
  • Case 1 When the first duration is less than or equal to the first preset duration and the target reduction ratio is greater than or equal to the first preset ratio, it is determined that the target reduction ratio and the first duration meet the voltage sag determination condition.
  • the target decrease ratio when the first duration is less than or equal to the first preset duration and the target decrease ratio is greater than or equal to the first preset ratio, it may indicate that the voltage value of the input voltage has dropped significantly in a shorter period of time, which may indicate that a voltage drop has occurred.
  • Scenario 2 When the first duration is greater than the second preset duration and the target decrease ratio is greater than or equal to the second preset ratio, it is determined that the target decrease ratio and the target duration meet the voltage sag determination conditions, wherein the second preset duration is greater than the first preset duration, and the second preset ratio is less than the first preset ratio.
  • the target decrease ratio when the first duration is greater than the second preset duration and the target decrease ratio is greater than or equal to the second preset ratio, it can indicate that although the voltage value of the input voltage has decreased less, the voltage value after the decrease has been at a longer time. Such a situation can indicate that a voltage drop has occurred.
  • the target decrease ratio and the first duration satisfy the voltage sag determination condition in the following manner: when the first duration is less than or equal to the first preset duration, and the target decrease ratio is greater than or equal to the first preset ratio, determine that the target decrease ratio and the first duration satisfy the voltage sag determination condition, wherein the voltage value of the input voltage is the voltage value of the alternating current input to the power supply circuit, the value range of the first preset duration is [half a cycle of the alternating current, one cycle of the alternating current], and the value range of the first preset ratio is [90%, 99%], or [90%, 95%], or [95%, 99%].
  • the value range of the first preset duration and the value range of the first preset ratio can be adjusted according to, but not limited to, the actual operation requirements of the device.
  • the voltage drop i.e., the above-mentioned target drop ratio
  • the voltage drop is greater than 95% of the normal input voltage drop (i.e., the above-mentioned first preset ratio)
  • the drop is 95% (i.e., the above-mentioned target drop ratio), that is, the input voltage is 5V (i.e., the above-mentioned current voltage value). Therefore, within 8 to 10 milliseconds and the input voltage is instantly lower than 5V, it can be regarded as an input voltage drop.
  • the target reduction ratio and the target duration satisfy the voltage sag determination condition in the following manner: when the first duration is greater than the second preset duration and the target reduction ratio is greater than or equal to the second preset ratio, determine that the target reduction ratio and the target duration satisfy the voltage sag determination condition, wherein the voltage value of the input voltage is the voltage value of the alternating current input to the power supply circuit, the value range of the second preset time period is [one cycle of the alternating current, two cycles of the alternating current], and the value range of the second preset ratio is [20%, 40%], or [20%, 30%], or [30%, 40%].
  • the value range of the second preset duration and the value range of the second preset ratio can be adjusted according to, but not limited to, the actual operation requirements of the device. For example: within more than 1 AC cycle (approximately 16ms to 20ms), if the voltage value decreases by more than 30% of the normal input voltage, it can be regarded as an input voltage sag.
  • the input voltage is 100V (i.e., the normal voltage value mentioned above), and the decrease is 30% (i.e., the second preset ratio mentioned above), that is, the input voltage is 70V (i.e., the current voltage value mentioned above).
  • the duration i.e., the first duration mentioned above
  • 20ms i.e., the second preset duration mentioned above
  • 70V the decrease in the voltage value is less than 30%
  • step S1008 it is possible but not limited to detect in real time whether the voltage value of the input voltage of the power supply circuit decreases during the process of the power supply circuit supplying power to the target device, and when the voltage value of the input voltage decreases, determine the decrease ratio between the decreased voltage value and the normal voltage value, and the duration of the input voltage being at the decreased voltage value, and determine whether the decrease degree of the current input voltage meets the voltage sag determination condition based on the decrease ratio of the voltage value and the duration of the input voltage being at the decreased voltage value, and In the event of a voltage sag, the output voltage provided by the power supply circuit to the device is controlled within a voltage value range that is safe for the device, thereby avoiding a sudden increase in the output voltage provided by the power supply circuit to the device caused by a sudden input voltage sag, and ensuring the normal operation of the device.
  • the output voltage provided by the power supply circuit to the device can be controlled by, but not limited to, controlling the output voltage of the power factor correction pole. In this way, the server damage caused by the burning of the maximum capacitor of the power factor correction pole is avoided.
  • the target protection operation may be performed on the power circuit in the following manner but is not limited to: adjusting the duty cycle of the control signal of the output voltage in the power circuit so that the output voltage is less than or equal to a preset target voltage value.
  • the target voltage value may be, but is not limited to, a voltage value for controlling extremely safe operation of the power factor correction, and may be, but is not limited to, 80%, 90%, 85% and the like of the input voltage of the power supply circuit.
  • PFC Output (6000-(4000*ADC counter/(main_Output_Current>>6))*ADC counter ⁇ 440, where 6000 is the constant value calculated by the formula, 4000 is the constant value calculated by the formula, ADC counter is the value of the analog-to-digital converter (ADC) fed back to the MCU, PFC Output is the output voltage of the power factor correction electrode, main_Output_Current is the PSU output current (that is, the reverse recovery current mentioned above), main_Output_Current>>6 means that the ADC counter conversion value must be greater than 6, and PFC Output ⁇ 440 means that the output voltage of the power factor correction electrode must be less than 440V.
  • main_Output_Current condition must be set, that is, main_Output_Current cannot be zero.
  • main_Output_Current cannot be zero.
  • two PSUs are connected in parallel, and the other PSU will remain in standby mode without main output. The result cannot be zero, that is, it is necessary to ensure that main_Output_Current ⁇ 0.
  • Overflow will occur in the DSP (Digital Signal Processing), the output will be out of control, and the output voltage V_BULK of the power factor correction pole will increase.
  • the output voltage of the power factor correction pole can be controlled, but is not limited to, when the output voltage of the power factor correction pole is greater than 440 V.
  • a 3200W, 12V output PSU uses a 12-bit MCU.
  • the duty cycle refers to the percentage of the time when the circuit is turned on to the entire circuit working cycle.
  • the output voltage of the power supply circuit can be controlled to be less than or equal to a voltage value that is safe for the equipment (i.e., the target voltage value mentioned above) by adjusting the duty cycle, but is not limited to it.
  • the target voltage value when the first duration is greater than the second preset duration and the target decrease ratio is greater than or equal to the second preset ratio and the target voltage value when the first duration is greater than the second preset duration and the target decrease ratio is greater than or equal to the second preset ratio may be, but is not limited to, the same voltage value (for example, both are 440V) or different voltage values.
  • the duty cycle of the control signal of the output voltage in the power supply circuit can be adjusted in the following manner, but is not limited to, so that the output voltage is less than or equal to a preset target voltage value: the duty cycle of the control signal is adjusted to be less than or equal to the target duty cycle, so that the output voltage is less than or equal to the preset target voltage value, wherein the target duty cycle is a duty cycle determined based on the target voltage value and the current voltage value.
  • the output voltage of the power supply circuit may be less than or equal to a preset target voltage value by adjusting the duty cycle of the control signal to be less than or equal to a target duty cycle, but is not limited to this.
  • the output voltage of the power factor correction electrode current voltage value/(1-D), D ⁇ 1 (duty cycle will be less than 1). That is, for the power factor correction electrode, when the current voltage value is much less than the target voltage value, the power factor correction electrode needs to provide a larger duty cycle to meet the boost requirement. Therefore, the wider the input voltage range, the greater the chip duty cycle adjustment capability.
  • the input voltage sag is determined when the voltage drop is greater than 95% of the normal input voltage drop (i.e., the first preset duration) between 0 and 1/2 AC cycles, which is approximately 8ms to 10ms (i.e., the first preset duration mentioned above). If the input voltage is 100V (i.e., the normal voltage value mentioned above), the drop is 95% (i.e., the target drop ratio mentioned above), and the target voltage value is 440V, i.e., the input voltage is 5V (i.e., the current voltage value mentioned above).
  • the duty cycle D is calculated to be limited to 0.98, that is, the duty cycle of the control signal is adjusted to be less than or equal to 0.98.
  • the duty cycle D is calculated to be limited to 0.84 (i.e. the target duty cycle mentioned above), that is, the duty cycle of the control signal is adjusted to be less than or equal to 0.84.
  • the duty cycle of the control signal can be adjusted to be less than or equal to the target duty cycle in the following manner but is not limited to: a target pulse width modulation signal is input as a drive signal to a switching device in a power supply circuit so that the duty cycle of the control signal output by the switching device is adjusted to be less than or equal to the target duty cycle, wherein the target pulse width modulation signal is used to control the switching device to be turned on or off.
  • the primary-side MCU in the server power supply can provide a PWM (Pulse-width modulation) signal to the main switch Q (i.e., the switching device mentioned above), and the main switch Q generates a duty cycle that conforms to the above PWM signal as a driving signal (i.e., the above control signal), thereby controlling the operation of the power factor correction electrode and the output voltage of the power factor correction electrode.
  • PWM Pulse-width modulation
  • control process of the above-mentioned power supply circuit is explained below in combination with an optional embodiment, which can be applicable to but not limited to the embodiments of the present application.
  • FIG12 is a schematic diagram of adjusting the duty cycle according to an embodiment of the present application.
  • Vin ⁇ Nominal AC Voltage ranges drop 95% that is, within the occurrence time between 0 to 1/2 AC cycle (that is, the above-mentioned first duration is less than or equal to the first preset duration) of approximately 8ms to 10ms (8 to 10 milliseconds)
  • the voltage drop is greater than 95% of the normal input voltage drop (that is, the above-mentioned target drop ratio is greater than or equal to the first preset ratio), which can be regarded as an input voltage drop
  • Vin ⁇ Nominal AC Voltage ranges drop 30% that is, within a time greater than 1 AC cycle (16ms to 20ms)
  • the input voltage is 100V (that is, the above-mentioned normal voltage value)
  • the primary-side MCU in the server power supply provides a PWM (pulse width modulation) signal to the main switch Q (i.e., the switching device mentioned above) via the Gate Driver (gate-level power amplifier).
  • the main switch Q generates a duty cycle that meets the above PWM signal as a drive signal (i.e., the above control signal), thereby controlling the operation of the power factor correction electrode and the output voltage of the power factor correction electrode.
  • the current value of the reverse recovery current of the power supply circuit is the voltage value of the alternating current input to the power supply circuit; determining whether the current value of the reverse recovery current over multiple cycles satisfies a preset current abnormality determination condition; and determining that an abnormality occurs in the input current of the power supply circuit when the current value of the reverse recovery current over multiple cycles satisfies the current abnormality determination condition.
  • FIG. 13 is a waveform diagram of a reverse recovery current according to an embodiment of the present application.
  • current disturbance is allowed within the first 1ms, and in the case of rapid recovery of the input voltage, a physical phenomenon of reverse recovery current (Sag recovery current) will be generated. This may cause a sudden increase in the input current (Iac) in the first four cycles, thereby causing the input fuse (Input Fuse) in the power supply circuit to burn out, and the input voltage (AC) and input current continue to maintain a sine wave in the next four cycles.
  • It can be, but is not limited to, real-time monitoring of the current value of the reverse recovery current of the power supply circuit over multiple cycles of alternating current through the MCU on the primary side, and determining whether the input current of the power supply circuit is abnormal based on the current value of the reverse recovery current of the power supply circuit over multiple cycles of alternating current.
  • the reverse recovery current when it is determined that the current values of the reverse recovery current in N consecutive cycles of the alternating current are all less than the first preset current value, it can be indicated that the current value of the reverse recovery current does not meet the current abnormality judgment condition, that is, the reverse recovery current is normal.
  • the normal current value may be but is not limited to corresponding to the number of server power supplies, for example: when one PSU is operating, the operating current (i.e., the normal current value mentioned above) is 1*Iin(A), where Iin(A) is the normal operating current of one PSU; when two PSUs are operating, the operating current (i.e., the normal current value mentioned above) is defined as 2*Iin(A), where Iin(A) is the normal operating current of one PSU.
  • the current values of the reverse recovery current in M cycles are all less than the second preset current value, it is determined whether the current values of the reverse recovery current in P consecutive cycles after the M cycles are all less than the third preset current value.
  • the current values of the reverse recovery current in P consecutive cycles after the M cycles are all less than the third preset current value, it can be indicated that the current values of the reverse recovery current in multiple cycles do not meet the current abnormality judgment condition.
  • the value range of A is [2.5, 3.5], or [2.5, 3], or [3, 3.5];
  • the value range of B is The value range of C is (1, 1.4], (1, 1.1], or [1.1, 1.4].
  • the primary-side MCU may, but is not limited to, determine whether the current value of the reverse recovery current over multiple cycles meets the current abnormality determination condition.
  • Figure 14 is a schematic diagram of controlling the output voltage of a power factor correction pole according to an embodiment of the present application. As shown in Figure 14, it may, but is not limited to, determine whether a reverse recovery current is generated.
  • the output voltage provided by the above-mentioned power circuit to the target device needs to be adjusted to 420V.
  • the output voltage of the power factor correction pole is limited to 420V. In this way, the input fuse is effectively prevented from being blown due to the reverse recovery current, and the damage of the Server PSU caused by the sudden drop of the input voltage can be prevented.
  • current disturbances can be allowed in the first 1ms, but are not limited to, and the reverse recovery current of the first 4 AC cycles (i.e., the above-mentioned continuous N cycles) should be controlled to not exceed 300% of the working current (i.e., the above-mentioned first preset current value).
  • the next 4 AC (i.e., the above-mentioned M cycles) cycles do not exceed 200% (i.e., the above-mentioned second preset current value).
  • the next 25 AC cycles i.e., the above-mentioned P cycles
  • do not exceed 110% i.e., the above-mentioned third preset current value.
  • the output voltage of the power factor correction pole can be adjusted to 420V, but is not limited to, to avoid the input fuse from blowing, which causes damage to the server power supply.
  • the duty cycle of the control signal of the output voltage in the power supply circuit can be adjusted, but is not limited to, so that the output voltage is less than or equal to a preset voltage value.
  • the above preset voltage value can be the same as the target voltage value or different from the target voltage value.
  • the output voltage (V_Bulk) of the power factor correction pole can be controlled to 420V by the primary side MCU, but is not limited to.
  • the feedback voltage judgment formula of the output voltage of the Server PSU power factor correction pole is as follows:
  • V_Bulk_min is the minimum output voltage of the power factor correction pole
  • V_Bulk_normal is the normal output voltage of the power factor correction pole, which is usually 415V
  • Po is the output power of PSU, which can be but not limited to 3200W
  • Load is the load condition, which can be but not limited to 80%
  • PSFB_Eff is the full-bridge phase-shift conversion efficiency of the PSU main output topology, which can be but not limited to 96%
  • ⁇ t is the duration of Sag recovery current (reverse recovery current), which can be but not limited to 20ms.
  • C_Bulk is the capacitance value of the capacitor (212, Bulk Cap) in the power factor correction pole, which can be but not limited to 925uF.
  • C_Tolerance is the error range of the capacitance value of the capacitor (212, Bulk Cap) in the power factor correction pole.
  • a control device for a power supply circuit includes: an input voltage detection module, which is configured to obtain the voltage value of the input voltage of the power supply circuit, wherein the power supply circuit is configured to supply power to a target device; a control module, which is configured to determine, when detecting that the voltage value of the input voltage of the power supply circuit has dropped, a target drop ratio of a current voltage value after the input voltage drops relative to a normal voltage value, and a target duration of time for the input voltage to be at the current voltage value; and a determination of whether the target drop ratio is consistent with the target voltage.
  • the target protection operation is used to control the output voltage provided by the power supply circuit to the target device to be less than or equal to a preset target voltage value when a voltage sag occurs in the input voltage of the power supply circuit.
  • control module is a processing device, and the processing device is configured to determine whether the target decrease ratio and the first duration satisfy a preset voltage sag determination condition by executing the following steps: when the first duration is less than or equal to the first preset duration, and the target decrease ratio is greater than or equal to the first preset ratio, it is determined that the target decrease ratio and the first duration satisfy the voltage sag determination condition; and/or when the first duration is greater than the second preset duration, and the target decrease ratio is greater than or equal to the second preset ratio, it is determined that the target decrease ratio and the target duration satisfy the voltage sag determination condition, wherein the second preset duration is greater than the first preset duration, and the second preset ratio is less than the first preset ratio.
  • the above-mentioned device further includes: a power supply circuit, wherein the power supply circuit includes a switching device, and the switching device is configured to output a control signal; wherein the control module is connected to the power supply circuit and is configured to implement a target protection operation on the power supply circuit by performing the following steps: inputting a target pulse width modulation signal as a driving signal to the switching device in the power supply circuit, so that the duty cycle of the control signal output by the switching device is adjusted to be less than or equal to the target duty cycle, wherein the target pulse width modulation signal is used to control the switching device to be turned on or off, and the duty cycle of the control signal is used to make the output voltage less than or equal to the target duty cycle;
  • the target voltage value is set; wherein the power supply circuit includes: an electromagnetic interference filter, a bridge rectifier and a power factor correction pole, the input end of the electromagnetic interference filter is connected to an AC power supply that provides AC power to the power supply circuit, the output end of the electromagnetic interference filter is connected to the input end of
  • the above-mentioned device also includes: an input current detection module, which is configured to obtain the current value of the reverse recovery current of the power supply circuit over multiple cycles of the alternating current when it is determined that the input voltage of the power supply circuit has a voltage drop, wherein the voltage value of the input voltage is the voltage value of the alternating current input to the power supply circuit; wherein the control module is also configured to determine whether the current value of the reverse recovery current over multiple cycles meets a preset current abnormality judgment condition; when the current value of the reverse recovery current over multiple cycles meets the current abnormality judgment condition, it is determined that the input current of the power supply circuit has an abnormality.
  • an input current detection module which is configured to obtain the current value of the reverse recovery current of the power supply circuit over multiple cycles of the alternating current when it is determined that the input voltage of the power supply circuit has a voltage drop, wherein the voltage value of the input voltage is the voltage value of the alternating current input to the power supply circuit
  • the control module is also configured to determine whether the current value of the reverse recovery current over multiple
  • FIG 15 is a structural schematic diagram of a server power supply according to an embodiment of the present application.
  • the above-mentioned power supply circuit may include but is not limited to an EMI (Electromagnetic Interference) filter, a bridge rectifier (Rectifier Bridge), a power factor correction pole and a DC-DC converter, AC_LINE1 (AC input line 1) and AC_LINE2 (AC input line 2) provide input voltage for the above-mentioned power supply circuit 104, a diode (Diode) in the power factor correction pole, and a switch Q in the power factor correction pole.
  • EMI Electromagnetic Interference
  • the control device of the power supply circuit may include, but is not limited to, a primary-side MCU 202 (i.e., the control module mentioned above), an input voltage detection module 204, an input current detection module 206, a voltage detection module 208 of a power factor correction pole, and a server power supply 210.
  • the input voltage detection module 204 includes an input voltage feedback signal and a sensor (Vin sense signal conditioning) and an ADC (Analog-to-Digital Converter) in the power factor correction pole
  • the input current detection module 206 includes a current feedback signal and a sensor (Current sense signal conditioning), an ADC, and an EADC in the power factor correction pole
  • the voltage detection module 208 of the power factor correction pole may include, but is not limited to, a current feedback signal and a sensor (Vout sense signal conditioning) and an ADC in the power factor correction pole.
  • the primary-side MCU can, but is not limited to, detect the input voltage and input current of the above-mentioned power supply circuit through the input voltage detection module 204 and the input current detection module 206, and can, but is not limited to, detect the output voltage (PFC_vout) of the power factor correction pole through the voltage detection module 208.
  • the switch pulse width modulation signal (PWM) in the power factor correction pole is input as a driving signal to the switching device Q in the power supply circuit, so that the duty cycle of the control signal output by the switching device Q is less than or equal to the target duty cycle, thereby achieving the control of the output voltage of the power factor correction pole within a voltage value range that is safe for the equipment (which can be, but is not limited to, less than or equal to 440V).
  • PWM switch pulse width modulation signal
  • control method of the power circuit in the embodiment of the present application does not require additional hardware installation, and only requires adding this function to the existing architecture and firmware.
  • the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course it can also be implemented by hardware, but in many cases the former is a better implementation method.
  • the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, a disk, or an optical disk), including a number of instructions for a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods of each embodiment of the present application.
  • a control device for a power supply circuit is also provided, which is configured to implement the above-mentioned embodiments and optional 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 for 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.
  • FIG16 is a structural block diagram of a control device for a power supply circuit according to an embodiment of the present application.
  • the device includes: a detection module 1602, which is configured to detect whether the voltage value of the input voltage of the power supply circuit decreases, wherein the power supply circuit is configured to supply power to a target device, wherein the power supply circuit includes: an electromagnetic interference filter, a bridge rectifier, and a power factor correction electrode, wherein the input end of the electromagnetic interference filter is connected to an AC power supply that provides AC power to the power supply circuit, the output end of the electromagnetic interference filter is connected to the input end of the bridge rectifier, the output end of the bridge rectifier is connected to the input end of the power factor correction electrode, the output end of the power factor correction electrode is connected to the target device, and the input voltage of the power supply circuit is the voltage of the AC power provided by the AC power supply;
  • the first determination module 1604 is configured to determine, when a voltage value drop of the input voltage is detected, a target drop ratio of a current voltage value after the input voltage drops relative to a normal voltage value, and a first duration of time during which the input voltage is at the current voltage value;
  • the first judgment module 1606 is configured to judge whether the target drop ratio and the first duration satisfy a preset voltage drop judgment condition
  • the execution module 1608 is configured to determine that a voltage sag occurs in the input voltage of the power supply circuit when it is determined that the target reduction ratio and the first duration satisfy the voltage sag determination condition, and perform a target protection operation on the power supply circuit, wherein the target protection operation is used to control the output voltage provided by the power supply circuit to the target device to be less than or equal to a preset target voltage value when a voltage sag occurs in the input voltage of the power supply circuit; the output voltage provided to the target device is the voltage output from the output end of the power factor correction pole.
  • the above device in the process of the power supply circuit supplying power to the device, it is possible to determine in real time whether a voltage sag has occurred based on the detected drop ratio of the input voltage of the power supply circuit and the duration of the voltage value of the input voltage of the power supply circuit after the drop, and in the case of a voltage sag, the voltage output by the power supply circuit to the device is controlled to a safe voltage value, thereby avoiding the output voltage of the power supply circuit exceeding the operating voltage range of the device when the input voltage of the power supply circuit drops suddenly, thereby causing damage to the device. Therefore, the problem that a sudden drop in input voltage may cause damage to the device can be solved, achieving the effect of reducing the damage to the device caused by a sudden drop in input voltage.
  • the first determination module includes:
  • the first judgment unit is configured to judge that the target reduction ratio and the first duration satisfy the voltage sag judgment condition when the first duration is less than or equal to the first preset duration and the target reduction ratio is greater than or equal to the first preset ratio; and/or
  • the second judgment unit is configured to judge that the target reduction ratio and the target duration satisfy the voltage sag judgment condition when the first duration is greater than the second preset duration and the target reduction ratio is greater than or equal to the second preset ratio, wherein the second preset duration is greater than the first preset duration and the second preset ratio is less than the first preset ratio.
  • the first determination unit is configured to:
  • the target decrease ratio and the first duration satisfy the voltage sag determination condition, wherein the voltage value of the input voltage is the voltage value of the alternating current input to the power supply circuit, the value range of the first preset duration is [half a cycle of the alternating current, one cycle of the alternating current], and the value range of the first preset ratio is [90%, 99%], or [90%, 95%], or [95%, 99%].
  • the second determination unit is configured to:
  • the target decrease ratio and the target duration meet the voltage sag determination condition, wherein the voltage value of the input voltage is the voltage value of the alternating current input to the power supply circuit, the value range of the second preset duration is [one cycle of the alternating current, two cycles of the alternating current], and the value range of the second preset ratio is [20%, 40%], or [20%, 30%], or [30%, 40%].
  • the first determining module includes:
  • An acquisition unit is configured to acquire a voltage difference between a current voltage value and a normal voltage value
  • the determination unit is configured to determine the target reduction ratio to be equal to the ratio of the voltage difference value to the normal voltage value.
  • the execution module includes:
  • the regulating unit is configured to regulate the duty cycle of the control signal of the output voltage in the power supply circuit so that the output voltage is less than or equal to a preset target voltage value.
  • the adjusting unit is configured to:
  • the duty cycle of the control signal is adjusted to be less than or equal to the target duty cycle, so that the output voltage is less than or equal to a preset target voltage value, wherein the target duty cycle is a duty cycle determined based on the target voltage value and the current voltage value.
  • the apparatus further comprises:
  • the second determination module is configured to determine the target duty cycle by the following formula:
  • V1 represents the current voltage value
  • V2 represents the target voltage value
  • the adjusting unit is configured to:
  • the target pulse width modulation signal is input as a driving signal to the switching device in the power supply circuit so that the duty cycle of the control signal output by the switching device is adjusted to be less than or equal to the target duty cycle, wherein the target pulse width modulation signal is used to control the switching device to be turned on or off.
  • the apparatus further comprises:
  • an acquisition module configured to acquire current values of a reverse recovery current of the power circuit over multiple cycles of the alternating current when it is determined that a voltage drop occurs in the input voltage of the power circuit, wherein the voltage value of the input voltage is a voltage value of the alternating current input to the power circuit;
  • a second judgment module is configured to judge whether the current value of the reverse recovery current over a plurality of cycles satisfies a preset current abnormality judgment condition
  • the third determination module is configured to determine that the input current of the power supply circuit is abnormal when the current value of the reverse recovery current in a plurality of cycles satisfies the current abnormality determination condition.
  • the second determination module includes:
  • a third judgment unit is configured to judge whether the current values of the reverse recovery current in N consecutive cycles of the alternating current are all less than a first preset current value, wherein N is a positive integer greater than or equal to 2, the first preset current value is A times the normal current value of the working current of the power supply circuit, A is a positive number greater than 1, and the multiple cycles include the N cycle;
  • the fourth judgment unit is configured to judge that the current values of the reverse recovery current in multiple cycles meet the current abnormality judgment condition when the current values of the reverse recovery current in N cycles are not all less than the first preset current value.
  • the second determination module further includes:
  • a fifth judgment unit configured to judge whether the current values of the reverse recovery current in M consecutive cycles after the N cycles are all less than a second preset current value when the current values of the reverse recovery current in N cycles are all less than the first preset current value, wherein M is a positive integer greater than or equal to 2, the second preset current value is B times the normal current value of the working current of the power supply circuit, B is a positive number greater than 1, B is less than A, and the multiple cycles include N cycles and M cycles;
  • the sixth judgment unit is configured to judge that the current values of the reverse recovery current over a plurality of cycles satisfy the current abnormality judgment condition when the current values of the reverse recovery current over M cycles are not all less than the second preset current value.
  • the second determination module further includes:
  • the seventh judgment unit is configured to judge that when the current values of the reverse recovery currents in the M cycles are all less than the second preset current value, whether the current values of the reverse recovery current in consecutive P cycles after the M cycles are all less than a third preset current value, wherein P is a positive integer greater than or equal to 2, the third preset current value is C times the normal current value of the working current of the power supply circuit, C is a positive number greater than 1, C is less than B, and the multiple cycles include N cycles, M cycles, and P cycles;
  • the eighth judgment unit is configured to judge that the current values of the reverse recovery current over multiple cycles meet the current abnormality judgment condition when the current values of the reverse recovery current over P cycles are not all less than the third preset current value.
  • the value range of A is [2.5, 3.5], or [2.5, 3], or [3, 3.5];
  • the value range of B is [1.5, 2.4], or [1.5, 2], or [2, 2.4];
  • the value range of C is (1, 1.4], or (1, 1.1], or [1.1, 1.4].
  • the above modules can be implemented by software or hardware. For the latter, it can be implemented in the following ways, but not limited to: the above modules are all located in the same processor; or the above modules are located in different processors in any combination.
  • An embodiment of the present application further provides a non-volatile readable storage medium, in which a computer program is stored, wherein the computer program is configured to execute the steps of any of the above method embodiments when running.
  • the above-mentioned non-volatile readable storage medium may include, but is not limited to: a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk, and other media that can store computer programs.
  • An embodiment of the present application further provides an electronic device, including a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.
  • the electronic device may further include a transmission device and an input/output device, wherein the transmission device is connected to the processor, and the input/output device is connected to the processor.
  • modules or steps of the above-mentioned embodiments of the present application can be implemented by a general computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, and in some cases, the steps shown or described can be executed in a different order from that herein, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. In this way, the embodiments of the present application are not limited to any specific combination of hardware and software.

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Abstract

本申请实施例提供了一种电源电路的控制方法及装置、非易失性可读存储介质及电子装置，其中，该电源电路的控制方法包括：检测电源电路的输入电压的电压值是否下降；在检测到输入电压的电压值下降的情况下，确定输入电压下降后的当前电压值相对于正常电压值的目标下降比例，以及输入电压处于当前电压值的第一持续时长；判断目标下降比例与第一持续时长是否满足预设的电压骤降判定条件；在判断出目标下降比例与第一持续时长满足电压骤降判定条件的情况下，确定电源电路的输入电压出现电压骤降，并对电源电路执行目标保护操作。通过本申请实施例，解决了输入电压骤降可能导致设备毁损的问题，达到减少输入电压骤降导致的设备毁损的效果。

Description

电源电路的控制方法及装置、非易失性可读存储介质及电子装置
相关申请的交叉引用
本申请要求于2023年1月9日提交中国专利局，申请号为202310030518.9，申请名称为“电源电路的控制方法及装置、存储介质及电子装置”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。
技术领域
本申请实施例涉及计算机领域，特别的，涉及一种电源电路的控制方法及装置、非易失性可读存储介质及电子装置。
背景技术
输入电压骤降(Voltage Sag)是指在给定频率下(50-60Hz)，交流电压下降，经历交流电的半个周期到1分钟的短暂持续期后恢复正常。电压骤降往往是供电系统故障造成的，比如：启动重负荷(如首次启动大型空调设备)、远端电力设备故障排除以及启动工业厂房内大型电机等等均可能导致电压显著降低。此外，供电设备短路因素(比如：树木生长接触到架空电缆、电缆损毁，又或者挖掘工程发生电力设备发生故障等等)、或者天气因素(比如：架空电缆受到雷击而跳掣等等)也可能会导致电压骤降。
输入电压骤降会对其所供电的设备造成极大的影响，比如：在服务器的应用场景中，输入电压骤降往往会对服务器的电源造成影响，轻则可能导致服务器中存储的资料遗失，重则造成服务器毁损无法开机。在这样的情况下，服务器已系统离线造成损失，必须由运维人员将毁损的服务器电源置换重新开机，才能将服务器重新上线。
针对相关技术中，输入电压骤降可能导致设备毁损的技术问题，尚未提出有效的解决方案。
发明内容
本申请实施例提供了一种电源电路的控制方法及装置、非易失性可读存储介质及电子装置，以至少解决相关技术中输入电压骤降可能导致设备毁损的问题。
根据本申请的一个实施例，提供了一种电源电路的控制方法，包括:检测电源电路的输入电压的电压值是否下降，其中，电源电路被设置为向目标设备供电，其中，电源电路包括：电磁干扰滤波器、桥式整流器和功率因数校正极，电磁干扰滤波器的输入端与为电源电路提供交流电的交流电源连接，电磁干扰滤波器的输出端与桥式整流器的输入端连接，桥式整流器的输出端与功率因数校正极的输入端连接，功率因数校正极的输出端与目标设备连接，电源电路的输入电压是交流电源提供的交流电的电压；在检测到输入电压的电压值下降的情况下，确定输入电压下降后的当前电压值相对于正常电压值的目标下降比例，以及输入电压处于当前电压值的第一持续时长；判断目标下降比例与第一持续时长是否满足预设的电压骤降判定条件；在判断出目标下降比例与第一持续时长满足电压骤降判定条件的情况下，确定电源电路的输入电压出现电压骤降，并对电源电路执行目标保护操作，其中，目标保护操作用于在电源电路的输入电压出现电压骤降的情况下，控制电源电路向目标设备提供的输出电压小于或等于预设的目标电压值；向目标设备提供的输出电压是功率因数校正极的输出端输出的电压。
在一个示例性实施例中，判断目标下降比例与第一持续时长是否满足预设的电压骤降判定条件，包括：在第一持续时长小于或等于第一预设时长、且目标下降比例大于或等于第一预设比例的情况下，判断出目标下降比例与第一持续时长满足电压骤降判定条件；和/或在第一持续时长大于第二预设时长、且目标下降比例大于或等于第二预设比例的情况下，判断出目标下降比例与目标时长满足电压骤降判定条件，其中，第二预设时长大于第一预设时长，第二预设比例小于第一预设比例。
在一个示例性实施例中，在第一持续时长小于或等于第一预设时长、且目标下降比例大于或等于第一预设比例的情况下，判断出目标下降比例与第一持续时长满足电压骤降判定条件，包括：在第一持续时长 小于或等于第一预设时长、且目标下降比例大于或等于第一预设比例的情况下，判断出目标下降比例与第一持续时长满足电压骤降判定条件，其中，输入电压的电压值是输入电源电路的交流电的电压值，第一预设时长的取值范围为[交流电的半个周期，交流电的一个周期]，第一预设比例的取值范围为[90％，99％]，或，[90％，95％]，或，[95％，99％]。
在一个示例性实施例中，在第一持续时长大于第二预设时长、且目标下降比例大于或等于第二预设比例的情况下，判断出目标下降比例与目标时长满足电压骤降判定条件，包括：在第一持续时长大于第二预设时长、且目标下降比例大于或等于第二预设比例的情况下，判断出目标下降比例与目标时长满足电压骤降判定条件，其中，输入电压的电压值是输入电源电路的交流电的电压值，第二预设时长的取值范围为[交流电的一个周期，交流电的两个周期]，第二预设比例的取值范围为[20％，40％]，或，[20％，30％]，或，[30％，40％]。
在一个示例性实施例中，确定输入电压下降后的当前电压值相对于正常电压值的目标下降比例，包括：获取当前电压值与正常电压值之间的电压差值；将目标下降比例确定为等于电压差值与正常电压值的比值。
在一个示例性实施例中，对电源电路执行目标保护操作，包括：调节电源电路中的输出电压的控制信号的占空比，使得输出电压处于小于或等于预设的目标电压值。
在一个示例性实施例中，调节电源电路中的输出电压的控制信号的占空比，使得输出电压处于小于或等于预设的目标电压值，包括：将控制信号的占空比调节成小于或等于目标占空比，使得输出电压处于小于或等于预设的目标电压值，其中，目标占空比是根据目标电压值和当前电压值确定得到的占空比。
在一个示例性实施例中，方法还包括：通过以下公式确定目标占空比：D＝1-V1/V2，其中，V1表示当前电压值，V2表示目标电压值。
在一个示例性实施例中，将控制信号的占空比调节成小于或等于目标占空比，包括：将目标脉宽调变信号作为驱动信号输入给电源电路中的开关器件，以使得开关器件输出的控制信号的占空比调节成小于或等于目标占空比，其中，目标脉宽调变信号用于控制开关器件导通或者断开。
在一个示例性实施例中，在确定出电源电路的输入电压出现电压骤降的情况下，方法还包括：获取交流电的多个周期上的电源电路的逆向回复电流的电流值，其中，输入电压的电压值是输入电源电路的交流电的电压值；判断多个周期上的逆向回复电流的电流值是否满足预设的电流异常判定条件；在多个周期上的逆向回复电流的电流值满足电流异常判定条件的情况下，确定电源电路的输入电流出现异常。
在一个示例性实施例中，判断多个周期上的逆向回复电流的电流值是否满足预设的电流异常判定条件，包括：判断交流电的连续的N个周期上的逆向回复电流的电流值是否都小于第一预设电流值，其中，N为大于或等于2的正整数，第一预设电流值是电源电路的工作电流的正常电流值的A倍，A为大于1的正数，多个周期包括N个周期；在N个周期上的逆向回复电流的电流值不都小于第一预设电流值的情况下，判断出多个周期上的逆向回复电流的电流值满足电流异常判定条件。
在一个示例性实施例中，判断多个周期上的逆向回复电流的电流值是否满足预设的电流异常判定条件，还包括：在N个周期上的逆向回复电流的电流值都小于第一预设电流值的情况下，判断N个周期之后的连续的M个周期上的逆向回复电流的电流值是否都小于第二预设电流值，其中，M为大于或等于2的正整数，第二预设电流值是电源电路的工作电流的正常电流值的B倍，B为大于1的正数，B小于A，多个周期包括N个周期和M个周期；在M个周期上的逆向回复电流的电流值不都小于第二预设电流值的情况下，判断出多个周期上的逆向回复电流的电流值满足电流异常判定条件。
在一个示例性实施例中，判断多个周期上的逆向回复电流的电流值是否满足预设的电流异常判定条件，还包括：在M个周期上的逆向回复电流的电流值都小于第二预设电流值的情况下，判断M个周期之后的连续的P个周期上的逆向回复电流的电流值是否都小于第三预设电流值，其中，P为大于或等于2的正整数，第三预设电流值是电源电路的工作电流的正常电流值的C倍，C为大于1的正数，C小于B，多个周期 包括N个周期、M个周期和P个周期；在P个周期上的逆向回复电流的电流值不都小于第三预设电流值的情况下，判断出多个周期上的逆向回复电流的电流值满足电流异常判定条件。
在一个示例性实施例中，A的取值范围为[2.5，3.5]，或者，[2.5，3]，或者，[3，3.5]；B的取值范围为[1.5，2.4]，或者，[1.5，2]，或者，[2，2.4]；C的取值范围为(1，1.4]，或者，(1，1.1]，或者，[1.1，1.4]。
根据本申请的另一个实施例，提供了一种电源电路的控制装置，包括：输入电压检测模块，被设置为获取电源电路的输入电压的电压值，其中，电源电路被设置为向目标设备供电；控制模块，被设置为在检测到电源电路的输入电压的电压值下降的情况下，确定输入电压下降后的当前电压值相对于正常电压值的目标下降比例，以及输入电压处于当前电压值的目标持续时长；判断目标下降比例与目标持续时长是否满足预设的电压骤降判定条件；在判断出目标下降比例与目标持续时长满足电压骤降判定条件的情况下，确定电源电路的输入电压出现电压骤降，并对电源电路执行目标保护操作，其中，目标保护操作用于在电源电路的输入电压出现电压骤降的情况下，控制电源电路向目标设备提供的输出电压小于或等于预设的目标电压值。
在一个示例性实施例中，控制模块是处理器件，处理器件被设置为通过执行以下步骤来实现判断目标下降比例与第一持续时长是否满足预设的电压骤降判定条件：在第一持续时长小于或等于第一预设时长、且目标下降比例大于或等于第一预设比例的情况下，判断出目标下降比例与第一持续时长满足电压骤降判定条件；和/或在第一持续时长大于第二预设时长、且目标下降比例大于或等于第二预设比例的情况下，判断出目标下降比例与目标时长满足电压骤降判定条件，其中，第二预设时长大于第一预设时长，第二预设比例小于第一预设比例。
在一个示例性实施例中，还包括：电源电路，其中，电源电路中包括开关器件，开关器件被设置为输出控制信号；其中，控制模块与电源电路连接，被设置为通过执行以下步骤来实现对电源电路执行目标保护操作：将目标脉宽调变信号作为驱动信号输入给电源电路中的开关器件，以使得开关器件输出的控制信号的占空比调节成小于或等于目标占空比，其中，目标脉宽调变信号用于控制开关器件导通或者断开，控制信号的占空比用于使得输出电压处于小于或等于预设的目标电压值；其中，电源电路包括：电磁干扰滤波器、桥式整流器和功率因数校正极，电磁干扰滤波器的输入端与为电源电路提供交流电的交流电源连接，电磁干扰滤波器的输出端与桥式整流器的输入端连接，桥式整流器的输出端与功率因数校正极的输入端连接，功率因数校正极的输出端与目标设备连接，开关器件位于功率因数校正极中；其中，电源电路的输入电压是交流电源提供的交流电的电压，向目标设备提供的输出电压是功率因数校正极的输出端输出的电压。
在一个示例性实施例中，还包括：输入电流检测模块，被设置为在确定出电源电路的输入电压出现电压骤降的情况下，获取交流电的多个周期上的电源电路的逆向回复电流的电流值，其中，输入电压的电压值是输入电源电路的交流电的电压值；其中，控制模块还被设置为判断多个周期上的逆向回复电流的电流值是否满足预设的电流异常判定条件；在多个周期上的逆向回复电流的电流值满足电流异常判定条件的情况下，确定电源电路的输入电流出现异常。
根据本申请的又一个实施例，提供了一种电源电路的控制装置，包括：检测模块，被设置为检测电源电路的输入电压的电压值是否下降，其中，电源电路被设置为向目标设备供电，其中，电源电路包括：电磁干扰滤波器、桥式整流器和功率因数校正极，电磁干扰滤波器的输入端与为电源电路提供交流电的交流电源连接，电磁干扰滤波器的输出端与桥式整流器的输入端连接，桥式整流器的输出端与功率因数校正极的输入端连接，功率因数校正极的输出端与目标设备连接，电源电路的输入电压是交流电源提供的交流电的电压；第一确定模块，被设置为在检测到输入电压的电压值下降的情况下，确定输入电压下降后的当前电压值相对于正常电压值的目标下降比例，以及输入电压处于当前电压值的第一持续时长；第一判断模块，被设置为判断目标下降比例与第一持续时长是否满足预设的电压骤降判定条件；执行模块，被设置为 在判断出目标下降比例与第一持续时长满足电压骤降判定条件的情况下，确定电源电路的输入电压出现电压骤降，并对电源电路执行目标保护操作，其中，目标保护操作用于在电源电路的输入电压出现电压骤降的情况下，控制电源电路向目标设备提供的输出电压小于或等于预设的目标电压值；向目标设备提供的输出电压是功率因数校正极的输出端输出的电压。
根据本申请的又一个实施例，还提供了一种非易失性可读存储介质，非易失性可读存储介质中存储有计算机程序，其中，计算机程序被设置为运行时执行上述任一项方法实施例中的步骤。
根据本申请的又一个实施例，还提供了一种电子装置，包括存储器和处理器，存储器中存储有计算机程序，处理器被设置为运行计算机程序以执行上述任一项方法实施例中的步骤。
通过本申请实施例，在电源电路向设备供电的过程中，可以根据检测到的电源电路的输入电压的下降比例和电源电路的输入电压在下降后的电压值的持续时长，实时判断是否发生了电压骤降，并在发生了电压骤降的情况下，将电源电路向设备输出的电压控制在安全的电压值，避免了在电源电路的输入电压骤降的情况下，电源电路的输出电压超出设备的工作电压范围，进而导致的设备的毁损。因此，可以解决输入电压骤降可能导致设备毁损的问题，达到减少输入电压骤降导致的设备毁损的效果。
附图说明
图1是根据本申请实施例的一种服务器网络架构示意图；
图2是根据本申请实施例的一种电源电路的控制方法的应用场景示意图；
图3是根据本申请实施例的一种主动式功率因数校正极升压式电路结构框图；
图4(a)是根据本申请实施例的一种升压式电路电感作用波形图一；
图4(b)是根据本申请实施例的一种升压式电路电感作用波形图二；
图5是根据本申请实施例的一种电压骤降的波形示意图；
图6是根据本申请实施例的一种最大电容的烧毁示意图；
图7是根据本申请实施例的一种功率因数校正极的输出电压波形量测图；
图8是根据本申请实施例的一种输入保险丝的烧毁示意图；
图9是根据本申请实施例的一种服务器电源的输入电流的波形量测图；
图10是根据本申请实施例的电源电路的控制方法的流程图；
图11是根据本申请实施例的一种服务器电源的框架示意图；
图12是根据本申请实施例的一种调节占空比的示意图；
图13是根据本申请实施例的一种逆向回复电流的波形图；
图14是根据本申请实施例的一种控制功率因数校正极的输出电压的示意图；
图15是根据本申请实施例的一种服务器电源的结构示意图；
图16是根据本申请实施例的电源电路的控制装置的结构框图。
具体实施方式
下文中将参考附图并结合实施例来详细说明本申请的实施例。
需要说明的是，本申请实施例的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。
图1是根据本申请实施例的一种服务器网络架构示意图，本申请实施例可以运行于图1所示的网络架构上，如图1所示，该网络架构包括：服务器102、服务器104和服务器106。
可以但不限于以上述服务器102作为上述目标设备为例，对本申请实施例中的电源电路的控制方法的应用场景进行解释说明。图2是根据本申请实施例的一种电源电路的控制方法的应用场景示意图，如图2所示，向服务器102供电的电源电路104包括EMI(Electromagnetic Interference，电磁干扰)滤波器 106、桥式整流器(Rectifier Bridge)108、功率因数校正极(PFC(Power Factor Correction)stage)110以及DC-DC变换器112(Direct Current-Direct Current Converter，直流-直流转换器)，AC(Alternating Current，交流电)LINE1和AC LINE2为上述电源电路104提供输入电压，F1和F2为输入保险丝。
功率因数校正极110，为电源输入极，其主要作用是让电压与电流的相位相同且使负载近似于电阻性。有很多电气产品，因其内部阻抗的特性，使得其功率因数非常低，为提高电气产品的功率因数，必须在电源输入端加装功率因数修正电路(Power factor correction circuit)。根据因数校正极电路中所使用元件来分类，可分为被动式和主动式功因修正器两种。被动式功因修正器在最好状况下PF(Power Factor，功率因数)值也只能达到70％，在严格的功因要求规范下并不适用。若要在全电压范围内(90V至265V)且轻重载情况下都能达到85％以上的PF值，则主动式功因修正器是必要的选择。主动式功率因数校正极多为升压式电路结构(Boost Topology)。
图3是根据本申请实施例的一种主动式功率因数校正极升压式电路结构框图，如图3所示，上述主动式功率因数校正极升压式电路包括桥式整流器，功率因数校正极的电感L，功率因数校正极的二极管D，功率因数校正极的开关器件Q(可以但不限于为MOS管(Metal-Oxide-Semiconductor Field-Effect Transistor，金氧半场效晶体管)，功率因数校正极的输出电容C，功率因数校正极的开关器件控制电路PFC LC，功率因数校正极的侦测反馈电路(Power&Feed Back Stage)和Load RL(输出负载)。输入电压可以但不限于为AC90V至265V，在Vd(桥式整流器的输出电压)点则为127V至375V直流电压，由升压电路将功率因数校正极的输出电压Vo升到400V的直流。图4(a)是根据本申请实施例的一种升压式电路电感作用波形图一，如图4(a)所示，横坐标表示时间t，纵坐标表示电压值V。图4(b)是根据本申请实施例的一种升压式电路电感作用波形图二，如图4(b)所示，横坐标表示时间t，纵坐标表示占空比D，占空比D可以但不限于等于A与(A+B)的比值，结合图3、图4(a)和图4(b)，对主动式功率因数校正极升压式电路工作过程解释说明如下：当Q导通时，电感L上的电压VL＝Vd(桥式整流器输出的电压)，此时Vd、电感L、Q形成回路，Vd对电感L充电，回路如图3中虚线箭头所示。图4(b)是根据本申请实施例的一种升压式电路电感作用波形图二，如图4(b)所示，此时电感电流ζL循着同一斜率上升，到Q截止为止，工作周期(D0T)结束。当Q截止时，电感L电压反相且加上Vd经由二极管D对输出端开始放电，此时电容C为充电状态，且RL维持Vo输出，其中Vo的大小为输入电压Vd加上电感电压(-VL)的值(由于电感电压反相，-VL反而是正值)，其回路如图3中的实线箭头所示，直到Q再度导通为止(即(1-D0)T时间段结束)。
在上述电源电路104的输入电压发生电压骤降情况下，可能会导致服务器102毁损而无法开机。图5是根据本申请实施例的一种电压骤降的波形示意图，如图5所示，横坐标表示时间t，纵坐标表示输入电压的电压值V，在发生电压骤降的情况下，电压的波形较未发生电压骤降的情况下，明显降低。对毁损或无法开机的服务器进行故障分析，其主要原因为服务器电源在输入电压骤降时造成烧毁。详细来说，可能是功率因数校正极的最大电容(Bulk Cap)烧毁，也可能是输入保险丝(Input Fuse)熔断。
图6是根据本申请实施例的一种最大电容的烧毁示意图，如图6所示，输入电压的骤降会导致功率因数校正极的最大电容烧毁，进而导致服务器电源烧毁。在这样的情况下，可以通过对PFC stage Bulk Cap的波形进行分析，进而分析最大电容烧毁的原因。图7是根据本申请实施例的一种功率因数校正极的输出电压波形量测图，如图7所示，在输入电压骤降的情况下，会导致功率因数校正极的输出电压(即最大电容的电压，Bulk Cap Voltage，也即上述的电源电路向目标设备提供的输出电压)上升至615V，一般Bulk Cap的耐压为450V，因此会导致Bulk Cap烧毁。
图8是根据本申请实施例的一种输入保险丝的烧毁示意图，如图8所示，输入电压骤降输入保险丝熔断，进而导致上述电源电路无法正常为服务器102供电。可以通过对服务器电源的输入电流进行分析，进而得知输入保险丝熔断的原因。图9是根据本申请实施例的一种服务器电源的输入电流的波形量测图，如 图9所示，在输入电压骤降的情况下，如果输入电压断电后瞬间回复，会产生逆向回复电流(Sag recovery cur rent)的物理现象。在这样的情况下，服务器电源(Server Power Supply Unit，以下简称为PSU)的输入电流可能会超过正常工作电流的300％，进而导致输入保险丝(Input Fuse)烧毁。一般保险丝能够支持AC4个周期内200％电流，超出就会导致输入保险丝熔断。
而本申请实施例中的电源电路的控制方法，可以实时检测上述电源电路104的输入电压是否发生了下降，并可以根据检测到的输入电压的下降比例和持续时长，判断是否发生了电压骤降，并在发生了电压骤降的情况下，将上述电源电路向服务器102提供的输出电压(即上述DC-DC变换器112所输出的电压)控制在安全的电压值范围，避免了输入保险丝(Input Fuse)烧毁以及功率因数校正极的最大电容烧毁，进而极大的减少了服务器102因为电压骤降而导致的服务器电源烧毁的可能性，保证了服务器在发生电压骤降的情况下正常运作。
在本实施例中提供了一种运行于上述网络架构中的每个服务器的电源电路的控制方法，图10是根据本申请实施例的电源电路的控制方法的流程图，如图10所示，该流程包括如下步骤：
步骤S1002，检测电源电路的输入电压的电压值是否下降，其中，电源电路被设置为向目标设备供电，其中，电源电路包括：电磁干扰滤波器、桥式整流器和功率因数校正极，电磁干扰滤波器的输入端与为电源电路提供交流电的交流电源连接，电磁干扰滤波器的输出端与桥式整流器的输入端连接，桥式整流器的输出端与功率因数校正极的输入端连接，功率因数校正极的输出端与目标设备连接，电源电路的输入电压是交流电源提供的交流电的电压；
步骤S1004，在检测到输入电压的电压值下降的情况下，确定输入电压下降后的当前电压值相对于正常电压值的目标下降比例，以及输入电压处于当前电压值的第一持续时长；
步骤S1006，判断目标下降比例与第一持续时长是否满足预设的电压骤降判定条件；
步骤S1008，在判断出目标下降比例与第一持续时长满足电压骤降判定条件的情况下，确定电源电路的输入电压出现电压骤降，并对电源电路执行目标保护操作，其中，目标保护操作用于在电源电路的输入电压出现电压骤降的情况下，控制电源电路向目标设备提供的输出电压小于或等于预设的目标电压值；向目标设备提供的输出电压是功率因数校正极的输出端输出的电压。
通过上述步骤，在电源电路向设备供电的过程中，可以根据检测到的电源电路的输入电压的下降比例和电源电路的输入电压在下降后的电压值的持续时长，实时判断是否发生了电压骤降，并在发生了电压骤降的情况下，将电源电路向设备输出的电压控制在安全的电压值，避免了在电源电路的输入电压骤降的情况下，电源电路的输出电压超出设备的工作电压范围，进而导致的设备的毁损。因此，可以解决输入电压骤降可能导致设备毁损问题，达到减少输入电压骤降导致的设备毁损效果。
其中，上述步骤的执行主体可以为服务器等，但不限于此。
步骤S1002和步骤S1004的执行顺序是可以互换的，即可以先执行步骤S1004，然后再执行步骤S1002。
在上述步骤S1002提供的技术方案中，目标设备可以但不限于包括服务器、工业厂房内大型电机等等电力设备，目标设备在运行过程中往往需要稳定的电压输入，可以但不限于在电源电路向目标设备供电的过程中，实时检测电源电路的输入电压的电压值是否下降。
可选的，在本实施例中，电源电路的输入电压可以但不限于为交流电压或者直流电压等等，交流电压可以但不限于为交流电所提供的电压，直流电压可以但不限于为直流电所提供的电压等等。
在上述步骤S1004提供的技术方案中，正常电压值可以但不限于为目标设备在正常运行过程中所要求的稳定的电压值，可以但不限于在电源电路向目标设备供电的过程中，实时检测电源电路的输入电压的电压值是否下降，并在检测到输入电压的电压值下降的情况下，确定下降后的电压值与正常电压值的下降比例，以及输入电压处于下降后的电压值的持续时长。
可选的，在本实施例中，在未检测到输入电压的电压值下降的情况下，可以表明电源电路的输入电压 处于稳定状态，在这样的情况下，可以但不限于继续检测输入电压的电压值是否下降。
在一个示范性实施例中，可以但不限于通过以下方式确定输入电压下降后的当前电值相对于正常电压值的目标下降比例：获取当前电压值与正常电压值之间的电压差值；将目标下降比例确定为等于电压差值与正常电压值的比值。
可选的，在本实施例中，可以但不限于将下降后的电压值与正常电压值之间的差值与正常电压值之间的比值确定为电压值的下降比例。通过这样的方式，实现了准确反映出下降后的电压值相较于正常电压值的下降程度。
在上述步骤S1006提供的技术方案中，可以但不限于在电源电路向目标设备供电的过程中，实时检测电源电路的输入电压的电压值是否下降，并在检测到输入电压的电压值下降的情况下，确定下降后的电压值与正常电压值的下降比例，以及输入电压处于下降后的电压值的持续时长，并根据电压值的下降比例和输入电压处于下降后的电压的持续时长，判断当前输入电压的下降程度是否满足电压骤降的判定条件，提升了判断是否出现了电压骤降的准确性。
可选的，在本实施例中，预设的电压骤降判定条件中的持续时长和下降比例可以但不限于根据设备实际的运行需求进行调整，比如：根据欧洲标准EN50160，电压下降至标准值(即上述的正常电压值)90％以下，然后回复到90％以上，在下降后电压值持续时间10ms到60s，即可认为发生了电压骤降。
可选的，在本实施例中，可以但不限于通过服务器电源中的MCU(Micro Controller Unit，微处理器)根据输入电压的下降比例以及输入电压在下降后的电压值的持续时长来判断是否出现了电压骤降。图11是根据本申请实施例的一种服务器电源的框架示意图，如图11所示，上述服务器电源可以但不限于为交流输入(AC input)，上述服务器电源的框架可以但不限于包括输入保险丝(Line Fuse)，防电磁干扰滤波器(EMI Filter)，输入涌浪电流保护电路(Inrush Protection)，全桥整流(Full Bridge Rectifier)和功率因数校正极，高效率隔离器和DC-DC转换器(含同步整流)可以但不限于包括半桥谐振直流转换器(Half Bridge LLC)和中心抽头式同步整流(Center Tapped with SR)；主输出均流并联电路包括电源输出流反馈侦测电路(Current Sense)和电源并联开关MOS管控制信号(Oring control)；待机电源均流并联电路；一次侧(PRIMARY Side)MCU及保护电路与主变压器高侧连接，二次侧(SECONDARY Side)MCU及保护电路与主变压器低侧连接，信号隔离耦合器(ISOLATOR)和电源内部风扇(PSU风扇)。12V main可以但不限于为主用电压，12V standby可以但不限于为辅助电压。电源内部风扇可以但不限于与主用电压和辅助电压连接。
输入保险丝可以但不限于通过熔断的方式防止起火；防电磁干扰滤波器被设置为滤除电磁干扰和杂波；输入涌浪电流保护电路为抑制启动电流电路，可以但不限于被设置为抑制启动电流；全桥整流和功率因数校正极可以但不限于被设置为总谐波失真抑制，并向功率因数校正级输出电压。
一次侧MCU(即上述的控制器件)及保护电路可以但不限于向输入涌浪电流保护电路传输信号1(Relay control，继电器控制信号)，一次侧MCU接收全桥整流和功率因数校正极传回的信号2(Voltage and Current，功率因数校正极的输入电压电流反馈信号)，一次侧MCU向全桥整流和功率因数校正极传输信号3(Gate s ignal，功率因数校正极的开关器件MOS管控制信号)，一次侧MCU接收信号4(Sense1(靠一次侧MCU)，功率因数校正极的输出电压电流反馈信号)。信号隔离器向半桥谐振直流转换器传输信号5(Gate signal，直流转换LLC MOS管控制信号)，二次侧MCU及保护电路，向中心抽头式同步整流输出信号6(SR signal，同步整流开关MOS管控制信号)，二次侧MCU及保护电路接收主输出均流并联电路输出的信号7(Sense2(靠二次侧MCU)，LLC直流转换器输出电压电流反馈信)和信号9(Remote sense，输出补偿反馈侦测信号)，并向主输出均流并联电路传输信号8(Oring control，电源并联开关MOS管控制信号)。
MCU还可以但不限于被设置为电源供应器中转换器开关控制，风扇控制，LED(light-emitting diode，发光二极管)控制、监控、保护以及通讯等等，可以但不限于分为一次侧(PRIMARY Side)MCU及 二次侧(SECONDARY Side)MCU，其中，一次侧MCU可以但不限于被设置为功率因数校正极的开关控制、监控、保护、通讯以及FRU(Field Replace Unit，现场可更换单元)等等，二次侧MCU可以但不限于被设置为隔离型DC/DC转换器开关控制、风扇控制、LED控制监控、保护、通讯等等。
在一个示范性实施例中，判断目标下降比例与第一持续时长是否满足预设的电压骤降判定条件，可以但不限于包括以下情形至少之一：
情形一：在第一持续时长小于或等于第一预设时长、且目标下降比例大于或等于第一预设比例的情况下，判断出目标下降比例与第一持续时长满足电压骤降判定条件。
可选的，在实施例中，在第一持续时长小于或等于第一预设时长、且目标下降比例大于或等于第一预设比例的情况下，可以表明输入电压的电压值在较短的时间内出现了较大的下降，这样的情况可以表明发生了电压骤降。
情形二：在第一持续时长大于第二预设时长、且目标下降比例大于或等于第二预设比例的情况下，判断出目标下降比例与目标时长满足电压骤降判定条件，其中，第二预设时长大于第一预设时长，第二预设比例小于第一预设比例。
可选的，在本实施例中，在第一持续时长大于第二预设时长、且目标下降比例大于或等于第二预设比例的情况下，可以表明输入电压的电压值虽然下降较少，但处于下降后的电压值较长的时间，这样的情况可以表明发生了电压骤降。
在一个示范性实施例中，可以但不限于通过以下方式判断出目标下降比例与第一持续时长满足电压骤降判定条件：在第一持续时长小于或等于第一预设时长、且目标下降比例大于或等于第一预设比例的情况下，判断出目标下降比例与第一持续时长满足电压骤降判定条件，其中，输入电压的电压值是输入电源电路的交流电的电压值，第一预设时长的取值范围为[交流电的半个周期，交流电的一个周期]，第一预设比例的取值范围为[90％，99％]，或，[90％，95％]，或，[95％，99％]。
可选的，在本实施例中，可以但不限于根据设备的实际运行需求，调整第一预设时长的取值范围和第一预设比例的取值范围。比如：介于0至1/2AC周期大约为8ms至10ms(即上述的第一预设时长)内，且电压下降幅度(即上述的目标下降比例)大于正常输入电压的下降95％(即上述的第一预设比例)，可视为输入电压骤降。详细来说，如输入电压为100V(即上述的正常电压值)，下降幅度95％(即上述的目标下降比例)，即输入电压剩5V(即上述的当前电压值)。因此在8至10毫秒内且输入电压瞬间低于5V，可视为发生了输入电压骤降。
在一个示范性实施例中，可以但不限于通过以下方式判断出目标下降比例与目标时长满足电压骤降判定条件：在第一持续时长大于第二预设时长、且目标下降比例大于或等于第二预设比例的情况下，判断出目标下降比例与目标时长满足电压骤降判定条件，其中，输入电压的电压值是输入电源电路的交流电的电压值，第二预设时长的取值范围为[交流电的一个周期，交流电的两个周期]，第二预设比例的取值范围为[20％，40％]，或，[20％，30％]，或，[30％，40％]。
可选的，在本实施例中，可以但不限于根据设备的实际运行需求，调整第二预设时长的取值范围和第二预设比例的取值范围。比如：在大于1个AC周期(大约为16ms至20ms)内，且电压值的下降幅度大于正常输入电压的30％，可视为输入电压骤降。详细来说，比如：输入电压为100V(即上述的正常电压值)，下降幅度30％(即上述的第二预设比例)，即输入电压剩70V(即上述的当前电压值)。在持续时间(即上述的第一持续时长)大于20ms(即上述的第二预设时长)，且输入电压低于70V(即电压值的下降幅度小于30％)的情况下，可以表明发生了输入电压骤降。
在上述步骤S1008提供的技术方案中，可以但不限于在电源电路向目标设备供电的过程中，实时检测电源电路的输入电压的电压值是否下降，并在检测到输入电压的电压值下降的情况下，确定下降后的电压值与正常电压值的下降比例，以及输入电压处于下降后的电压值的持续时长，并根据电压值的下降比例和输入电压处于下降后的电压的持续时长，判断当前输入电压的下降程度是否满足电压骤降的判定条件，并 在出现电压骤降的情况下，将电源电路向设备提供的输出电压控制在对设备安全的电压值范围内，避免了输入电压骤降所导致的电源电路向设备提供的输出电压的骤升，保证了设备的正常运行。
可选的，在本实施例中，可以但不限于通过控制功率因数校正极的输出的电压的方式，进而控制电源电路向设备提供的输出电压。通过这样的方式，避免了控制功率因数校正极的最大电容烧坏而导致的服务器毁损。
在一个示范性实施例中，可以但不限于通过以下方式对电源电路执行目标保护操作：调节电源电路中的输出电压的控制信号的占空比，使得输出电压处于小于或等于预设的目标电压值。
可选的，在本实施例中，目标电压值可以但不限于为控制功率因数校正极安全运行的电压值，可以但不限于为电源电路的输入电压的80％，90％，85％等等。当输入电压骤降，功率因数校正极的输出电压(PFC Output)的计算公式如下：PFC Output＝(6000-(4000*ADC counter/(main_Output_Current>>6))*ADC counter<440，其中，6000为公式计算常数值，4000为公式计算常数值，ADC counter为回授进MCU的类比转数位(ADC)的取值，PFC Output为功率因数校正极的输出电压，main_Output_Current为PSU输出电流(即上述的逆向回复电流)，main_Output_Current>>6表示ADC counter转换值需大于6，PFC Output<440表示功率因数校正极的输出电压需小于440V。
需要注意的是，main_Output_Current条件必须设定，即main_Output_Current不能为零。在给定的测试条件下，两台PSU并连，且另一台PSU将保持在待机模式，而没有主输出，结果不可为零，即需要保证main_Output_Current≠0。DSP(Digital Signal Processing，数字信号处理)中将发生溢出，输出失控，导致功率因数校正极的输出电压V_BULK升高。main_Output_Current≠0。只要main_Output_Current>64，就永远不会除以零。
可以但不限于在功率因数校正极的输出电压大于440V的情况下，对功率因数校正极的输出电压进行控制。比如：3200W，12V输出的PSU，使用12位元MCU。那么，main_Output_Current为3200W/12V＝266.67A，12位元MCU解析度为2的12次方＝4096，main_Output_Current转为ADC counter＝266.67/4096＝0.0651，在这样的情况下，PFC Output＝(6000-(4000*0.0651/266.67)*0.0651＝390.5V。在390.5V<440V的情况下，正常输出；根据main_Output_Current>>6可以将ADC counter的转换输出为0.0651*6＝0.309A，即输出电流大于0.309A不会产生计算误区。
在main_Output_Current>64的情况下，ADC counter>64，则不会除以0或接近0的数避免发散。如发生保护场景main_Output_Current为130％＊266.67A＝346.67A，在这样的情况下，ADC counter＝346.67/4096＝0.08464，此时，PFC Output＝(6000-(4000*0.08464/346.67)*0.08464＝518.6V>440V，需要控制功率因数校正极的输出电压，进而对功率因数校正极进行保护。
可选的，在本实施例中，占空比(Duty)是指电路被接通的时间占整个电路工作周期的百分比，可以但不限于通过调节占空比的方式控制电源电路的输出电压小于或者等于对设备安全的电压值(即上述的目标电压值)。
可选的，在本实施例中，在第一持续时长大于第二预设时长、且目标下降比例大于或等于第二预设比例的情况下的目标电压值，与在第一持续时长大于第二预设时长、且目标下降比例大于或等于第二预设比例的情况下的目标电压值可以但不限于为相同的电压值(比如：均为440V)，或者不同的电压值。
在一个示范性实施例中，可以但不限于通过以下方式调节电源电路中的输出电压的控制信号的占空比，使得输出电压处于小于或等于预设的目标电压值：将控制信号的占空比调节成小于或等于目标占空比，使得输出电压处于小于或等于预设的目标电压值，其中，目标占空比是根据目标电压值和当前电压值确定得到的占空比。
可选的，在本实施例中，可以但不限于通过将控制信号的占空比调节成小于或者等于目标占空比的方式，使得电源电路的输出电压小于或者等于预设的目标电压值。
在一个示范性实施例中，可以但不限于通过以下公式确定目标占空比：D＝1-V1/V2，其中，V1表示当前 电压值，V2表示目标电压值。
可选的，在本实施例中，功率因数校正极的输出电压＝当前电压值/(1-D)，D<1(占空比会小于1)。即对于功率因数校正极，在当前电压值小于目标电压值较多的情况下，需功率因数校正极提供较大的占空比才能满足升压需要。所以输入电压范围越宽，芯片占空比调节能力越大。
可选的，在本实施例中，介于0至1/2AC周期大约为8ms至10ms(即上述的第一预设时长)内，且电压下降幅度(即上述的目标下降比例)大于正常输入电压的下降95％(即上述的第一预设比例)，来判断是否发生了输入电压骤降。如果输入电压为100V(即上述的正常电压值)，下降幅度95％(即上述的目标下降比例)，目标电压值为440V，即输入电压剩5V(即上述的当前电压值)。因此在8至10毫秒(即上述的第一持续时长)内且输入电压瞬间低于5V，可视为发生了输入电压骤降。在这样的情况下，根据440＝5/(1-D)，计算占空比D限幅为0.98，即将控制信号的占空比调节成小于或者等于0.98。
可选的，在本实施例中，在输入电压为100V(即上述的正常电压值)，下降幅度30％(即上述的第二预设比例)，目标电压值为440V，即输入电压剩70V(即上述的当前电压值)。在持续时间(即上述的第一持续时长)大于20ms(即上述的第二预设时长)，且输入电压低于70V(即电压值的下降幅度小于30％)的情况下，可以表明发生了电压骤降。在这样的情况下，根据440＝70/(1-D)，计算占空比D限幅0.84(即上述的目标占空比)，即将控制信号的占空比调节成小于或者等于0.84。
在一个示范性实施例中，可以但不限于通过以下方式将控制信号的占空比调节成小于或等于目标占空比：将目标脉宽调变信号作为驱动信号输入给电源电路中的开关器件，以使得开关器件输出的控制信号的占空比调节成小于或等于目标占空比，其中，目标脉宽调变信号用于控制开关器件导通或者断开。
可选的，在本实施例中，可以但不限于由服务器电源中的一次侧MCU提供PWM(Pulse-width modulation，脉宽调变)信号给主开关Q(即上述的开关器件)，主开关Q生成符合上述PWM信号的占空比作为驱动信号(即上述的控制信号)，进而控制功率因数校正极的工作及功率因数校正极的输出电压。
为了更好的理解上述电源电路的控制过程，下面再结合可选的实施例对上述电源电路的控制过程进行解释说明，可以但不限于适用于本申请实施例。
图12是根据本申请实施例的一种调节占空比的示意图，如图12所示，首先根据第一持续时长和目标下降比例，判断是否发生了输入电压骤降。比如：在0至1/2AC周期内，Vin<Nominal AC Voltage ranges drop95％，即在发生时间介于0至1/2AC周期(即上述的第一持续时长小于或等于第一预设时长)大约为8ms至10ms(8至10毫秒)内，电压下降幅度大于正常输入电压的下降95％(即上述的目标下降比例大于或等于第一预设比例)，可视为输入电压骤降；和/或，大于1AC cycle(周期)，Vin<Nominal AC Voltage ranges drop30％，即在大于1AC cycle(周期)的时间(16ms至20ms)内，输入电压为100V(即上述的正常电压值)，下降幅度30％(即上述的第二预设比例)，即输入电压剩70V(即上述的当前电压值)。在16ms至20ms(即上述的第一持续时长)内，输入电压低于70V(即电压值的下降幅度小于30％)的情况下，可以表明发生了电压骤降。
在判断出发生了电压骤降的情况下，可以但不限于通过下式计算功率因数校正极的输出电压：PFC Output＝(6000-(4000*ADC counter/(main_Output_Current>>6))*ADC counter<440。然后通过服务器电源中的一次侧MCU提供PWM(脉宽调变)信号经由Gate Driver(闸级功率放大器)给主开关Q(即上述的开关器件)，主开关Q生成符合上述PWM信号的占空比作为驱动信号(即上述的控制信号)，进而控制功率因数校正极的工作及功率因数校正极的输出电压。
在一个示范性实施例中，在确定出电源电路的输入电压出现电压骤降的情况下，可以但不限于通过以下方式确定电源电路的输入电流是否出现异常：获取交流电的多个周期上的电源电路的逆向回复电流的电流值，其中，输入电压的电压值是输入电源电路的交流电的电压值；判断多个周期上的逆向回复电流的电流值是否满足预设的电流异常判定条件；在多个周期上的逆向回复电流的电流值满足电流异常判定条件的情况下，确定电源电路的输入电流出现异常。
可选的，在本实施例中，在发生输入电压骤降(Voltage Sag)的情况下，如果输入电压迅速回复，会产生逆向回复电流(Sag recovery current)的物理现象。图13是根据本申请实施例的一种逆向回复电流的波形图，如图13所示，在前1ms内允许电流扰动，在输入电压迅速回复的情况下，会产生一个逆向回复电流(Sag recovery current)物理现象。这可能会导致输入电流(Iac)在前四个周期出现骤增，进而导致电源电路中的输入保险丝(Input Fuse)烧毁，在后四个周期输入电压(AC)和输入电流继续维持正弦波。可以但不限于通过一次侧的MCU实时监测电源电路的逆向回复电流在交流电的多个周期上的电流值，并根据电源电路的逆向回复电流在交流电的多个周期上的电流值确定电源电路的输入电流是否出现异常。
可选的，在本实施例中，在多个周期上的逆向回复电流的电流值均不满足电流异常判定条件的情况下，确定电源电路的输入电流未出现异常。在多个周期上的逆向回复电流的电流值中的至少一个电流值满足电流异常判定条件的情况下，确定电源电路的输入电流出现异常。
在一个示范性实施例中，可以但不限于通过以下方式判断多个周期上的逆向回复电流的电流值是否满足预设的电流异常判定条件：判断交流电的连续的N个周期上的逆向回复电流的电流值是否都小于第一预设电流值，其中，N为大于或等于2的正整数，第一预设电流值是电源电路的工作电流的正常电流值的A倍，A为大于1的正数，多个周期包括N个周期；在N个周期上的逆向回复电流的电流值不都小于第一预设电流值的情况下，判断出多个周期上的逆向回复电流的电流值满足电流异常判定条件。
可选的，在本实施例中，在判断出交流电的连续的N个周期上的逆向回复电流的电流值都小于第一预设电流值的情况下，可以表明逆向回复电流的电流值不满足电流异常判定条件，即逆向回复电流正常。
可选的，在本实施例中，正常电流值可以但不限于与服务器电源的数量相对应，比如：在一台PSU运行的情况下，工作电流(即上述的正常电流值)为1*Iin(A)，其中，Iin(A)为一台PSU的正常工作电流；在两台PSU运行的情况下，工作电流(即上述的正常电流值)定义为2*Iin(A)，其中，Iin(A)为一台PSU的正常工作电流。
在一个示范性实施例中，可以但不限于通过以下方式判断多个周期上的逆向回复电流的电流值是否满足预设的电流异常判定条件：在N个周期上的逆向回复电流的电流值都小于第一预设电流值的情况下，判断N个周期之后的连续的M个周期上的逆向回复电流的电流值是否都小于第二预设电流值，其中，M为大于或等于2的正整数，第二预设电流值是电源电路的工作电流的正常电流值的B倍，B为大于1的正数，B小于A，多个周期包括N个周期和M个周期；在M个周期上的逆向回复电流的电流值不都小于第二预设电流值的情况下，判断出多个周期上的逆向回复电流的电流值满足电流异常判定条件。
可选的，在本实施例中，在N个周期上的逆向回复电流的电流值都小于第一预设电流值的情况下，判断N个周期之后的连续的M个周期上的逆向回复电流的电流值是否都小于第二预设电流值，在M个周期上的逆向回复电流的电流值都小于第二预设电流值的情况下，判断出多个周期上的逆向回复电流的电流值不满足电流异常判定条件。
在一个示范性实施例中，可以但不限于通过以下方式判断多个周期上的逆向回复电流的电流值是否满足预设的电流异常判定条件：在M个周期上的逆向回复电流的电流值都小于第二预设电流值的情况下，判断M个周期之后的连续的P个周期上的逆向回复电流的电流值是否都小于第三预设电流值，其中，P为大于或等于2的正整数，第三预设电流值是电源电路的工作电流的正常电流值的C倍，C为大于1的正数，C小于B，多个周期包括N个周期、M个周期和P个周期；在P个周期上的逆向回复电流的电流值不都小于第三预设电流值的情况下，判断出多个周期上的逆向回复电流的电流值满足电流异常判定条件。
可选的，在本实施例中，在M个周期上的逆向回复电流的电流值都小于第二预设电流值的情况下，判断M个周期之后的连续的P个周期上的逆向回复电流的电流值是否都小于第三预设电流值，在M个周期之后的连续的P个周期上的逆向回复电流的电流值都小于第三预设电流值的情况下，可以表明多个周期上的逆向回复电流的电流值不满足电流异常判定条件。
在一个示范性实施例中，A的取值范围为[2.5，3.5]，或者，[2.5，3]，或者，[3，3.5]；B的取值范 围为[1.5，2.4]，或者，[1.5，2]，或者，[2，2.4]；C的取值范围为(1，1.4]，或者，(1，1.1]，或者，[1.1，1.4]。
可选的，在本实施例中，在判断出输入电压骤降的情况下，可以但不限于由一次侧MCU判断多个周期上的逆向回复电流的电流值是否满足电流异常判定条件。图14是根据本申请实施例的一种控制功率因数校正极的输出电压的示意图，如图14所示，可以但不限于判断是否产生了逆向回复电流，在产生了逆向回复电流的情况下，判断前4个AC循环(即上述的连续的N个周期)的逆向回复电流是否大于或者等于工作电流的300％(即上述的第一预设电流值)，ΔV(Vac peak-Bulk_min)是否大于25V。在判断出前4个AC循环(即上述的连续的N个周期)的逆向回复电流大于或者等于工作电流的300％(即上述的第一预设电流值)，ΔV(Vac peak-Bulk_min)大于25V的情况下，需要将功率因数校正极的输出电压(即上述的电源电路向目标设备提供的输出电压)调整至420V，在这样的情况下，对功率因数校正极的输出电压进行限幅至420V。通过这样的方式，有效防止了逆向回复电流所导致的输入保险丝熔断，即可防止因输入电压骤降造成Server PSU毁损。
可选的，在本实施例中，可以但不限于在前1ms可允许电流扰动，前4个AC循环(即上述的连续的N个周期)的逆向回复电流应控制在不超过工作电流的300％(即上述的第一预设电流值)。接下来的4个AC(即上述的M个周期)循环不超过200％(即上述的第二预设电流值)。接下来的25个AC循环(即上述的P个周期)不超过110％(即上述的第三预设电流值)。在上述任意周期内，逆向回复电流的电流值不满足对应的预设电流值，那么可以但不限于将功率因数校正极的输出电压调整至420V，避免了输入保险丝熔断，造成的服务器电源毁损。
可选的，在本实施例中，在确定电源电路的输入电流出现异常的情况下，可以但不限于调节电源电路中的输出电压的控制信号的占空比，使得输出电压处于小于或等于预设电压值。上述预设电压值既可以与目标电压值相同，也可以与目标电压值不同。可以但不限于通过一次侧MCU来控制功率因数校正极的输出电压(V_Bulk)调整至420V。Server PSU功率因数校正极的输出电压其回授电压判断式如下所示：
其中，V_Bulk_min为功率因数校正极的输出电压最低值，V_Bulk_normal为功率因数校正极的输出电压正常值，通常会在415V；Po为PSU的输出功率，可以但不限于为3200W；Load为负载条件，可以但不限于为80％；PSFB_Eff为PSU主输出拓扑全桥相移转换效率，可以但不限于为96％，Δt为Sag recovery current(逆向回复电流)的持续周期，可以但不限于持续20ms。C_Bulk为功率因数校正极中的电容(212，Bulk Cap)的电容值，可以但不限于为925uF。C_Tolerance为功率因数校正极中的电容(212，Bulk Cap)的电容值的误差范围。
当Vac_peak>V_Bulk时，功率因数校正极不工作，其中，Vac_peak为交流电的输入电压的峰值。在ΔV(Vac peak–Bulk_min)>25V。Sag recovery current>300％*Iin的情况下，其中，Iin为服务器正常工作的电流；为了覆盖Bulk cap(Tolerance:80％)，需要将功率因数校正极(PFC stage)的输出电压(V_Bulk)调整至420V。也就是说，将功率因数校正极中的电容(212，Bulk Cap)的电压增加到420V(Io>72A)，以覆盖更多范围。
在本申请实施例中还提供了一种电源电路的控制装置，上述电源电路的控制装置，包括：输入电压检测模块，被设置为获取电源电路的输入电压的电压值，其中，电源电路被设置为向目标设备供电；控制模块，被设置为在检测到电源电路的输入电压的电压值下降的情况下，确定输入电压下降后的当前电压值相对于正常电压值的目标下降比例，以及输入电压处于当前电压值的目标持续时长；判断目标下降比例与目 标持续时长是否满足预设的电压骤降判定条件；在判断出目标下降比例与目标持续时长满足电压骤降判定条件的情况下，确定电源电路的输入电压出现电压骤降，并对电源电路执行目标保护操作，其中，目标保护操作用于在电源电路的输入电压出现电压骤降的情况下，控制电源电路向目标设备提供的输出电压小于或等于预设的目标电压值。
在一个示范性实施例中，控制模块是处理器件，处理器件被设置为通过执行以下步骤来实现判断目标下降比例与第一持续时长是否满足预设的电压骤降判定条件：在第一持续时长小于或等于第一预设时长、且目标下降比例大于或等于第一预设比例的情况下，判断出目标下降比例与第一持续时长满足电压骤降判定条件；和/或在第一持续时长大于第二预设时长、且目标下降比例大于或等于第二预设比例的情况下，判断出目标下降比例与目标时长满足电压骤降判定条件，其中，第二预设时长大于第一预设时长，第二预设比例小于第一预设比例。
在一个示范性实施例中，上述装置还包括：电源电路，其中，电源电路中包括开关器件，开关器件被设置为输出控制信号；其中，控制模块与电源电路连接，被设置为通过执行以下步骤来实现对电源电路执行目标保护操作：将目标脉宽调变信号作为驱动信号输入给电源电路中的开关器件，以使得开关器件输出的控制信号的占空比调节成小于或等于目标占空比，其中，目标脉宽调变信号用于控制开关器件导通或者断开，控制信号的占空比用于使得输出电压处于小于或等于预设的目标电压值；其中，电源电路包括：电磁干扰滤波器、桥式整流器和功率因数校正极，电磁干扰滤波器的输入端与为电源电路提供交流电的交流电源连接，电磁干扰滤波器的输出端与桥式整流器的输入端连接，桥式整流器的输出端与功率因数校正极的输入端连接，功率因数校正极的输出端与目标设备连接，开关器件位于功率因数校正极中；其中，电源电路的输入电压是交流电源提供的交流电的电压，向目标设备提供的输出电压是功率因数校正极的输出端输出的电压。
在一个示范性实施例中，上述装置还包括：输入电流检测模块，被设置为在确定出电源电路的输入电压出现电压骤降的情况下，获取交流电的多个周期上的电源电路的逆向回复电流的电流值，其中，输入电压的电压值是输入电源电路的交流电的电压值；其中，控制模块还被设置为判断多个周期上的逆向回复电流的电流值是否满足预设的电流异常判定条件；在多个周期上的逆向回复电流的电流值满足电流异常判定条件的情况下，确定电源电路的输入电流出现异常。
图15是根据本申请实施例的一种服务器电源的结构示意图，如图15所示，上述电源电路可以但不限于包括EMI(Electromagnetic Interference，电磁干扰)滤波器、桥式整流器(Rectifier Bridge)、功率因数校正极以及DC-DC变换器，AC_LINE1(交流输入线路1)和AC_LINE2(交流输入线路2)为上述电源电路104提供输入电压，功率因数校正极中二极管(Diode)以及功率因数校正极中的开关Q。
上述电源电路的控制装置可以但不限于包括一次侧MCU202(即上述的控制模块)、输入电压检测模块204、输入电流检测模块206、功率因数校正极的电压侦测模块208以及服务器电源210。输入电压检测模块204包括功率因数校正极中的输入电压反馈信号及传感器(Vin sense signal conditioning)和ADC(Analog-to-Digital Converter，信号的类比数位转换)，输入电流检测模块206包括功率因数校正极中的电流反馈信号及传感器(Current sense signal conditioning)、ADC和EADC，功率因数校正极的电压侦测模块208可以但不限于包括功率因数校正极中的电流反馈信号及传感器(Vout sense signal conditioning)和ADC。一次侧MCU可以但不限于通过输入电压检测模块204与输入电流检测模块206对上述电源电路进行输入电压侦测和输入电流侦测，可以但不限于通过电压侦测模块208对功率因数校正极的输出电压(PFC_vout)进行侦测。并在侦测到发生了输入电压骤降的情况下，将功率因数校正极中的开关脉宽调变信号(PWM)作为驱动信号输入给电源电路中的开关器件Q，以使得开关器件Q输出的控制信号的占空比小于或等于目标占空比，进而实现了将功率因数校正极的输出电压控制在对设备安全的电压值范围(可以但不限于为小于或者等于440V)内。然后检测上述电源电路的逆向回复电流是否出现了异常，并在逆向回复电流出现了异常的情况下，将功率因数校正极的输出电压控制在420V的范围内。通过这样的方 式，极大的减少了维运人员因输入电压骤降的问题，需现场至机房排除问题的困扰，极大的降低了维持服务器正常运行的人力成本和时间成本。并且本申请实施例中的电源电路的控制方法无需额外硬件架设，在既有架构及固件上新增此功能即可。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到根据上述实施例的方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本申请实施例的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端设备(可以是手机，计算机，服务器，或者网络设备等)执行本申请各个实施例的方法。
在本实施例中还提供了一种电源电路的控制装置，该装置被设置为实现上述实施例及可选实施方式，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。
图16是根据本申请实施例的电源电路的控制装置的结构框图，如图16所示，该装置包括：检测模块1602，被设置为检测电源电路的输入电压的电压值是否下降，其中，电源电路被设置为向目标设备供电，其中，电源电路包括：电磁干扰滤波器、桥式整流器和功率因数校正极，电磁干扰滤波器的输入端与为电源电路提供交流电的交流电源连接，电磁干扰滤波器的输出端与桥式整流器的输入端连接，桥式整流器的输出端与功率因数校正极的输入端连接，功率因数校正极的输出端与目标设备连接，电源电路的输入电压是交流电源提供的交流电的电压；
第一确定模块1604，被设置为在检测到输入电压的电压值下降的情况下，确定输入电压下降后的当前电压值相对于正常电压值的目标下降比例，以及输入电压处于当前电压值的第一持续时长；
第一判断模块1606，被设置为判断目标下降比例与第一持续时长是否满足预设的电压骤降判定条件；
执行模块1608，被设置为在判断出目标下降比例与第一持续时长满足电压骤降判定条件的情况下，确定电源电路的输入电压出现电压骤降，并对电源电路执行目标保护操作，其中，目标保护操作用于在电源电路的输入电压出现电压骤降的情况下，控制电源电路向目标设备提供的输出电压小于或等于预设的目标电压值；向目标设备提供的输出电压是功率因数校正极的输出端输出的电压。
通过上述装置，在电源电路向设备供电的过程中，可以根据检测到的电源电路的输入电压的下降比例和电源电路的输入电压在下降后的电压值的持续时长，实时判断是否发生了电压骤降，并在发生了电压骤降的情况下，将电源电路向设备输出的电压控制在安全的电压值，避免了在电源电路的输入电压骤降的情况下，电源电路的输出电压超出设备的工作电压范围，进而导致的设备的毁损。因此，可以解决输入电压骤降可能导致设备毁损问题，达到减少输入电压骤降导致的设备毁损效果。
在一个示范性实施例中，第一判断模块，包括：
第一判断单元，被设置为在第一持续时长小于或等于第一预设时长、且目标下降比例大于或等于第一预设比例的情况下，判断出目标下降比例与第一持续时长满足电压骤降判定条件；和/或
第二判断单元，被设置为在第一持续时长大于第二预设时长、且目标下降比例大于或等于第二预设比例的情况下，判断出目标下降比例与目标时长满足电压骤降判定条件，其中，第二预设时长大于第一预设时长，第二预设比例小于第一预设比例。
在一个示范性实施例中，第一判断单元，被设置为：
在第一持续时长小于或等于第一预设时长、且目标下降比例大于或等于第一预设比例的情况下，判断出目标下降比例与第一持续时长满足电压骤降判定条件，其中，输入电压的电压值是输入电源电路的交流电的电压值，第一预设时长的取值范围为[交流电的半个周期，交流电的一个周期]，第一预设比例的取值范围为[90％，99％]，或，[90％，95％]，或，[95％，99％]。
在一个示范性实施例中，第二判断单元，被设置为：
在第一持续时长大于第二预设时长、且目标下降比例大于或等于第二预设比例的情况下，判断出目标下降比例与目标时长满足电压骤降判定条件，其中，输入电压的电压值是输入电源电路的交流电的电压值，第二预设时长的取值范围为[交流电的一个周期，交流电的两个周期]，第二预设比例的取值范围为[20％，40％]，或，[20％，30％]，或，[30％，40％]。
在一个示范性实施例中，第一确定模块，包括：
获取单元，被设置为获取当前电压值与正常电压值之间的电压差值；
确定单元，被设置为将目标下降比例确定为等于电压差值与正常电压值的比值。
在一个示范性实施例中，执行模块，包括：
调节单元，被设置为调节电源电路中的输出电压的控制信号的占空比，使得输出电压处于小于或等于预设的目标电压值。
在一个示范性实施例中，调节单元，被设置为：
将控制信号的占空比调节成小于或等于目标占空比，使得输出电压处于小于或等于预设的目标电压值，其中，目标占空比是根据目标电压值和当前电压值确定得到的占空比。
在一个示范性实施例中，装置还包括：
第二确定模块，被设置为通过以下公式确定目标占空比：
D＝1-V1/V2
其中，V1表示当前电压值，V2表示目标电压值。
在一个示范性实施例中，调节单元，被设置为：
将目标脉宽调变信号作为驱动信号输入给电源电路中的开关器件，以使得开关器件输出的控制信号的占空比调节成小于或等于目标占空比，其中，目标脉宽调变信号用于控制开关器件导通或者断开。
在一个示范性实施例中，装置还包括：
获取模块，被设置为在确定出电源电路的输入电压出现电压骤降的情况下，获取交流电的多个周期上的电源电路的逆向回复电流的电流值，其中，输入电压的电压值是输入电源电路的交流电的电压值；
第二判断模块，被设置为判断多个周期上的逆向回复电流的电流值是否满足预设的电流异常判定条件；
第三确定模块，被设置为在多个周期上的逆向回复电流的电流值满足电流异常判定条件的情况下，确定电源电路的输入电流出现异常。
在一个示范性实施例中，第二判断模块，包括：
第三判断单元，被设置为判断交流电的连续的N个周期上的逆向回复电流的电流值是否都小于第一预设电流值，其中，N为大于或等于2的正整数，第一预设电流值是电源电路的工作电流的正常电流值的A倍，A为大于1的正数，多个周期包括N个周期；
第四判断单元，被设置为在N个周期上的逆向回复电流的电流值不都小于第一预设电流值的情况下，判断出多个周期上的逆向回复电流的电流值满足电流异常判定条件。
在一个示范性实施例中，第二判断模块，还包括：
第五判断单元，被设置为在N个周期上的逆向回复电流的电流值都小于第一预设电流值的情况下，判断N个周期之后的连续的M个周期上的逆向回复电流的电流值是否都小于第二预设电流值，其中，M为大于或等于2的正整数，第二预设电流值是电源电路的工作电流的正常电流值的B倍，B为大于1的正数，B小于A，多个周期包括N个周期和M个周期；
第六判断单元，被设置为在M个周期上的逆向回复电流的电流值不都小于第二预设电流值的情况下，判断出多个周期上的逆向回复电流的电流值满足电流异常判定条件。
在一个示范性实施例中，第二判断模块，还包括：
第七判断单元，被设置为在M个周期上的逆向回复电流的电流值都小于第二预设电流值的情况下，判 断M个周期之后的连续的P个周期上的逆向回复电流的电流值是否都小于第三预设电流值，其中，P为大于或等于2的正整数，第三预设电流值是电源电路的工作电流的正常电流值的C倍，C为大于1的正数，C小于B，多个周期包括N个周期、M个周期和P个周期；
第八判断单元，被设置为在P个周期上的逆向回复电流的电流值不都小于第三预设电流值的情况下，判断出多个周期上的逆向回复电流的电流值满足电流异常判定条件。
在一个示范性实施例中，A的取值范围为[2.5，3.5]，或者，[2.5，3]，或者，[3，3.5]；B的取值范围为[1.5，2.4]，或者，[1.5，2]，或者，[2，2.4]；C的取值范围为(1，1.4]，或者，(1，1.1]，或者，[1.1，1.4]。
需要说明的是，上述各个模块是可以通过软件或硬件来实现的，对于后者，可以通过以下方式实现，但不限于此：上述模块均位于同一处理器中；或者，上述各个模块以任意组合的形式分别位于不同的处理器中。
本申请的实施例还提供了一种非易失性可读存储介质，该非易失性可读存储介质中存储有计算机程序，其中，该计算机程序被设置为运行时执行上述任一项方法实施例中的步骤。
在一个示例性实施例中，上述非易失性可读存储介质可以包括但不限于：U盘、只读存储器(Read-Only Memory，简称为ROM)、随机存取存储器(Random Access Memory，简称为RAM)、移动硬盘、磁碟或者光盘等各种可以存储计算机程序的介质。
本申请的实施例还提供了一种电子装置，包括存储器和处理器，该存储器中存储有计算机程序，该处理器被设置为运行计算机程序以执行上述任一项方法实施例中的步骤。
在一个示例性实施例中，上述电子装置还可以包括传输设备以及输入输出设备，其中，该传输设备和上述处理器连接，该输入输出设备和上述处理器连接。
本实施例中的可选的示例可以参考上述实施例及示例性实施方式中所描述的示例，本实施例在此不再赘述。
显然，本领域的技术人员应该明白，上述的本申请实施例的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本申请实施例不限制于任何特定的硬件和软件结合。
以上仅为本申请的可选实施例而已，并不用于限制本申请实施例，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请实施例的原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请实施例的保护范围之内。

Claims (21)

  1. 一种电源电路的控制方法，其特征在于，包括：
    检测电源电路的输入电压的电压值是否下降，其中，所述电源电路被设置为向目标设备供电，其中，所述电源电路包括：电磁干扰滤波器、桥式整流器和功率因数校正极，所述电磁干扰滤波器的输入端与为所述电源电路提供交流电的交流电源连接，所述电磁干扰滤波器的输出端与所述桥式整流器的输入端连接，所述桥式整流器的输出端与所述功率因数校正极的输入端连接，所述功率因数校正极的输出端与所述目标设备连接，所述电源电路的输入电压是所述交流电源提供的所述交流电的电压；
    在检测到所述输入电压的电压值下降的情况下，确定所述输入电压下降后的当前电压值相对于正常电压值的目标下降比例，以及所述输入电压处于所述当前电压值的第一持续时长；
    判断所述目标下降比例与所述第一持续时长是否满足预设的电压骤降判定条件；
    在判断出所述目标下降比例与所述第一持续时长满足所述电压骤降判定条件的情况下，确定所述电源电路的输入电压出现电压骤降，并对所述电源电路执行目标保护操作，其中，所述目标保护操作用于在所述电源电路的输入电压出现电压骤降的情况下，控制所述电源电路向所述目标设备提供的输出电压小于或等于预设的目标电压值；向所述目标设备提供的输出电压是所述功率因数校正极的输出端输出的电压。
  2. 根据权利要求1所述的方法，其特征在于，所述判断所述目标下降比例与所述第一持续时长是否满足预设的电压骤降判定条件，包括：
    在所述第一持续时长小于或等于第一预设时长、且所述目标下降比例大于或等于第一预设比例的情况下，判断出所述目标下降比例与所述第一持续时长满足所述电压骤降判定条件；和/或
    在所述第一持续时长大于第二预设时长、且所述目标下降比例大于或等于第二预设比例的情况下，判断出所述目标下降比例与目标时长满足所述电压骤降判定条件，其中，所述第二预设时长大于所述第一预设时长，所述第二预设比例小于所述第一预设比例。
  3. 根据权利要求2所述的方法，其特征在于，所述在所述第一持续时长小于或等于第一预设时长、且所述目标下降比例大于或等于第一预设比例的情况下，判断出所述目标下降比例与所述第一持续时长满足所述电压骤降判定条件，包括：
    在所述第一持续时长小于或等于第一预设时长、且所述目标下降比例大于或等于第一预设比例的情况下，判断出所述目标下降比例与所述第一持续时长满足所述电压骤降判定条件，其中，所述输入电压的电压值是输入所述电源电路的所述交流电的电压值，所述第一预设时长的取值范围为[所述交流电的半个周期，所述交流电的一个周期]，所述第一预设比例的取值范围为[90％，99％]，或，[90％，95％]，或，[95％，99％]。
  4. 根据权利要求2所述的方法，其特征在于，所述在所述第一持续时长大于第二预设时长、且所述目标下降比例大于或等于第二预设比例的情况下，判断出所述目标下降比例与所述目标时长满足所述电压骤降判定条件，包括：
    在所述第一持续时长大于第二预设时长、且所述目标下降比例大于或等于第二预设比例的情况下，判断出所述目标下降比例与所述目标时长满足所述电压骤降判定条件，其中，所述输入电压的电压值是输入所述电源电路的所述交流电的电压值，所述第二预设时长的取值范围为[所述交流电的一个周期，所述交流电的两个周期]，所述第二预设比例的取值范围为[20％，40％]，或，[20％，30％]，或，[30％，40％]。
  5. 根据权利要求1所述的方法，其特征在于，所述确定所述输入电压下降后的当前电压值相对于正常电压值的目标下降比例，包括：
    获取所述当前电压值与所述正常电压值之间的电压差值；
    将所述目标下降比例确定为等于所述电压差值与所述正常电压值的比值。
  6. 根据权利要求1所述的方法，其特征在于，所述对所述电源电路执行目标保护操作，包括：
    调节所述电源电路中的所述输出电压的控制信号的占空比，使得所述输出电压处于小于或等于预设的目标电压值。
  7. 根据权利要求6所述的方法，其特征在于，所述调节所述电源电路中的所述输出电压的控制信号的占空比，使得所述输出电压处于小于或等于预设的目标电压值，包括：
    将所述控制信号的占空比调节成小于或等于目标占空比，使得所述输出电压处于小于或等于预设的目标电压值，其中，所述目标占空比是根据所述目标电压值和所述当前电压值确定得到的占空比。
  8. 根据权利要求7所述的方法，其特征在于，所述方法还包括：
    通过以下公式确定所述目标占空比：
    D＝1-V1/V2
    其中，V1表示所述当前电压值，V2表示所述目标电压值。
  9. 根据权利要求7所述的方法，其特征在于，所述将所述控制信号的占空比调节成小于或等于目标占空比，包括：
    将目标脉宽调变信号作为驱动信号输入给所述电源电路中的开关器件，以使得所述开关器件输出的所述控制信号的占空比调节成小于或等于所述目标占空比，其中，所述目标脉宽调变信号用于控制所述开关器件导通或者断开。
  10. 根据权利要求1所述的方法，其特征在于，在确定出所述电源电路的输入电压出现电压骤降的情况下，所述方法还包括：
    获取所述交流电的多个周期上的所述电源电路的逆向回复电流的电流值，其中，所述输入电压的电压值是输入所述电源电路的所述交流电的电压值；
    判断所述多个周期上的所述逆向回复电流的电流值是否满足预设的电流异常判定条件；
    在所述多个周期上的所述逆向回复电流的电流值满足所述电流异常判定条件的情况下，确定所述电源电路的输入电流出现异常。
  11. 根据权利要求10所述的方法，其特征在于，所述判断所述多个周期上的所述逆向回复电流的电流值是否满足预设的电流异常判定条件，包括：
    判断所述交流电的连续的N个周期上的所述逆向回复电流的电流值是否都小于第一预设电流值，其中，N为大于或等于2的正整数，所述第一预设电流值是所述电源电路的工作电流的正常电流值的A倍，A为大于1的正数，所述多个周期包括所述N个周期；
    在所述N个周期上的所述逆向回复电流的电流值不都小于所述第一预设电流值的情况下，判断出所述多个周期上的所述逆向回复电流的电流值满足所述电流异常判定条件。
  12. 根据权利要求11所述的方法，其特征在于，所述判断所述多个周期上的所述逆向回复电流的电流值是否满足预设的电流异常判定条件，还包括：
    在所述N个周期上的所述逆向回复电流的电流值都小于所述第一预设电流值的情况下，判断所述N个周期之后的连续的M个周期上的所述逆向回复电流的电流值是否都小于第二预设电流值，其中，M为大于或等于2的正整数，所述第二预设电流值是所述电源电路的工作电流的正常电流值的B倍，B为大于1的正数，B小于A，所述多个周期包括所述N个周期和所述M个周期；
    在所述M个周期上的所述逆向回复电流的电流值不都小于所述第二预设电流值的情况下，判断出所述多个周期上的所述逆向回复电流的电流值满足所述电流异常判定条件。
  13. 根据权利要求12所述的方法，其特征在于，所述判断所述多个周期上的所述逆向回复电流的电流值是否满足预设的电流异常判定条件，还包括：
    在所述M个周期上的所述逆向回复电流的电流值都小于所述第二预设电流值的情况下，判断所述M个周期之后的连续的P个周期上的所述逆向回复电流的电流值是否都小于第三预设电流值，其中，P为大于或等于2的正整数，所述第三预设电流值是所述电源电路的工作电流的正常电流值的C倍，C为大于1的 正数，C小于B，所述多个周期包括所述N个周期、所述M个周期和所述P个周期；
    在所述P个周期上的所述逆向回复电流的电流值不都小于所述第三预设电流值的情况下，判断出所述多个周期上的所述逆向回复电流的电流值满足所述电流异常判定条件。
  14. 根据权利要求13所述的方法，其特征在于，
    A的取值范围为[2.5，3.5]，或者，[2.5，3]，或者，[3，3.5]；
    B的取值范围为[1.5，2.4]，或者，[1.5，2]，或者，[2，2.4]；
    C的取值范围为(1，1.4]，或者，(1，1.1]，或者，[1.1，1.4]。
  15. 一种电源电路的控制装置，其特征在于，包括：
    输入电压检测模块，被设置为获取电源电路的输入电压的电压值，其中，所述电源电路被设置为向目标设备供电；
    控制模块，被设置为在检测到所述电源电路的输入电压的电压值下降的情况下，确定所述输入电压下降后的当前电压值相对于正常电压值的目标下降比例，以及所述输入电压处于所述当前电压值的目标持续时长；判断所述目标下降比例与所述目标持续时长是否满足预设的电压骤降判定条件；在判断出所述目标下降比例与所述目标持续时长满足所述电压骤降判定条件的情况下，确定所述电源电路的输入电压出现电压骤降，并对所述电源电路执行目标保护操作，其中，所述目标保护操作用于在所述电源电路的输入电压出现电压骤降的情况下，控制所述电源电路向所述目标设备提供的输出电压小于或等于预设的目标电压值。
  16. 根据权利要求15所述的装置，其特征在于，所述控制模块是处理器件，所述处理器件被设置为通过执行以下步骤来实现判断所述目标下降比例与所述第一持续时长是否满足预设的电压骤降判定条件：
    在第一持续时长小于或等于第一预设时长、且所述目标下降比例大于或等于第一预设比例的情况下，判断出所述目标下降比例与所述第一持续时长满足所述电压骤降判定条件；和/或
    在所述第一持续时长大于第二预设时长、且所述目标下降比例大于或等于第二预设比例的情况下，判断出所述目标下降比例与目标时长满足所述电压骤降判定条件，其中，所述第二预设时长大于所述第一预设时长，所述第二预设比例小于所述第一预设比例。
  17. 根据权利要求15所述的装置，其特征在于，还包括：
    所述电源电路，其中，所述电源电路中包括开关器件，所述开关器件被设置为输出控制信号；
    其中，所述控制模块与所述电源电路连接，被设置为通过执行以下步骤来实现对所述电源电路执行目标保护操作：将目标脉宽调变信号作为驱动信号输入给所述电源电路中的所述开关器件，以使得所述开关器件输出的所述控制信号的占空比调节成小于或等于目标占空比，其中，所述目标脉宽调变信号用于控制所述开关器件导通或者断开，所述控制信号的占空比用于使得所述输出电压处于小于或等于预设的所述目标电压值；
    其中，所述电源电路包括：电磁干扰滤波器、桥式整流器和功率因数校正极，所述电磁干扰滤波器的输入端与为所述电源电路提供交流电的交流电源连接，所述电磁干扰滤波器的输出端与所述桥式整流器的输入端连接，所述桥式整流器的输出端与所述功率因数校正极的输入端连接，所述功率因数校正极的输出端与所述目标设备连接，所述开关器件位于所述功率因数校正极中；
    其中，所述电源电路的输入电压是所述交流电源提供的所述交流电的电压，向所述目标设备提供的输出电压是所述功率因数校正极的输出端输出的电压。
  18. 根据权利要求15所述的装置，其特征在于，还包括：
    输入电流检测模块，被设置为在确定出所述电源电路的输入电压出现电压骤降的情况下，获取交流电的多个周期上的所述电源电路的逆向回复电流的电流值，其中，所述输入电压的电压值是输入所述电源电路的所述交流电的电压值；
    其中，所述控制模块还被设置为判断所述多个周期上的所述逆向回复电流的电流值是否满足预设的电 流异常判定条件；在所述多个周期上的所述逆向回复电流的电流值满足所述电流异常判定条件的情况下，确定所述电源电路的所述输入电流出现异常。
  19. 一种电源电路的控制装置，其特征在于，包括：
    检测模块，被设置为检测电源电路的输入电压的电压值是否下降，其中，所述电源电路被设置为向目标设备供电，其中，所述电源电路包括：电磁干扰滤波器、桥式整流器和功率因数校正极，所述电磁干扰滤波器的输入端与为所述电源电路提供交流电的交流电源连接，所述电磁干扰滤波器的输出端与所述桥式整流器的输入端连接，所述桥式整流器的输出端与所述功率因数校正极的输入端连接，所述功率因数校正极的输出端与所述目标设备连接，所述电源电路的输入电压是所述交流电源提供的所述交流电的电压；
    第一确定模块，被设置为在检测到所述输入电压的电压值下降的情况下，确定所述输入电压下降后的当前电压值相对于正常电压值的目标下降比例，以及所述输入电压处于所述当前电压值的第一持续时长；
    第一判断模块，被设置为判断所述目标下降比例与所述第一持续时长是否满足预设的电压骤降判定条件；
    执行模块，被设置为在判断出所述目标下降比例与所述第一持续时长满足所述电压骤降判定条件的情况下，确定所述电源电路的输入电压出现电压骤降，并对所述电源电路执行目标保护操作，其中，所述目标保护操作用于在所述电源电路的输入电压出现电压骤降的情况下，控制所述电源电路向所述目标设备提供的输出电压小于或等于预设的目标电压值；向所述目标设备提供的输出电压是所述功率因数校正极的输出端输出的电压。
  20. 一种非易失性可读存储介质，其特征在于，所述非易失性可读存储介质中存储有计算机程序，其中，所述计算机程序被处理器执行时实现所述权利要求1至14任一项中方法的步骤。
  21. 一种电子装置，包括存储器、处理器以及存储在所述存储器上并可在所述处理器上运行的计算机程序，其特征在于，所述处理器执行所述计算机程序时实现所述权利要求1至14任一项中方法的步骤。
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