Control Method and Device for Server Power-Off Maintenance Time

Abstract

The present invention provides a control method, device and adjustable DC transformer circuit for the power-off maintenance time of a server. When the power supply of the server is powered off, the actual output voltage value of the adjustable DC transformer circuit of the power supply is collected; according to the actual output voltage value, as well as the expected output voltage value, turns ratio and input voltage value of the auxiliary winding of the adjustable DC transformer circuit, the increased conduction time of the switching tube in the buck circuit module of the adjustable DC transformer circuit during the working cycle is determined; according to the increased conduction time, the conduction duration of the switching tube during the working cycle is increased. The present invention can, without increasing the specification of the main capacitor, make up for the power loss generated in the load capacitor due to power-off by boosting the electric energy in the buck capacitor, ensure the voltage of the load capacitor is constant, and thus ensure a stable and constant power-off maintenance time even during power-off.

Description

Technical Field

[0001] The present invention relates to the field of computer technologies, and in particular, to a method and device for controlling the power-down maintenance time of a server, an adjustable DC transformer circuit, an electronic device, and a computer-readable storage medium. Background Art

[0002] The power-down maintenance time refers to the time during which the power supply of the server can maintain a normal output state after the power supply of the server loses power, so that the server can quickly back up data during this power-down maintenance time, reducing data loss caused by power-down.

[0003] Currently, it is possible to increase the specifications (capacitance value, volume, power, etc.) of the capacitor at the power output end to maintain a relatively long power-down maintenance time that meets the backup duration requirements.

[0004] However, currently, the integration level of the internal assembly space of the power supply of the server is relatively high. Increasing the specifications of the capacitor will, on the basis of a sharp increase in cost, have a greater adverse impact on the optimization of the internal assembly space of the power supply. Summary of the Invention

[0005] Embodiments of the present invention provide a method and device for controlling the power-down maintenance time of a server and an adjustable DC transformer circuit, so as to solve the problem in the prior art that increasing the specifications of the capacitor will, on the basis of a sharp increase in cost, have a greater adverse impact on the optimization of the internal assembly space of the power supply.

[0006] In a first aspect, an embodiment of the present invention provides a method for controlling the power-down maintenance time of a server, and the method includes:

[0007] When the power supply of the server loses power, collect the actual output voltage value of the adjustable DC transformer circuit of the power supply;

[0008] According to the actual output voltage value, as well as the expected output voltage value, turns ratio, and input voltage value of the auxiliary winding of the adjustable DC transformer circuit, determine the increased conduction time of the switching tube in the buck circuit module of the adjustable DC transformer circuit during the working cycle;

[0009] According to the increased conduction time, increase the conduction duration of the switching tube during the working cycle, so as to maintain the power-down maintenance time of the power supply within a preset time range when the power supply of the server loses power.

[0010] In a second aspect, an embodiment of the present invention provides a device for controlling the power-down maintenance time of a server, and the device includes:

[0011] A collection module, configured to collect the actual output voltage value of the adjustable DC transformer circuit of the power supply when the power supply of the server loses power;

[0012] A calculation module, configured to determine the increased conduction time of the switching tube in the working cycle of the buck circuit module of the adjustable DC transformer circuit according to the actual output voltage value, the desired output voltage value, the turns ratio, and the input voltage value of the auxiliary winding of the adjustable DC transformer circuit;

[0013] An adjustment module, configured to increase the conduction duration of the switching tube in the working cycle according to the increased conduction time, so as to maintain the power-off duration of the power supply within a preset time range when the power supply of the server loses power.

[0014] In a third aspect, an embodiment of the present invention further provides an adjustable DC transformer circuit, connected to the power supply of the server, for implementing the control method for the power-off maintenance time of the server. The circuit includes:

[0015] A buck circuit module, a buck capacitor, a main capacitor, a load capacitor, an inverter circuit module, a rectifier circuit module, an output capacitor, and a digital signal processing chip;

[0016] The buck capacitor is connected in series with the main capacitor, the buck capacitor is grounded, the buck circuit module is connected in parallel with the buck capacitor, and the buck circuit module obtains an input voltage through an auxiliary winding;

[0017] The main capacitor is connected in series with the load capacitor, the load capacitor is grounded, and the inverter circuit module is connected in parallel with the load capacitor; the first winding of the inverter circuit module is mutually coupled with the second winding of the rectifier circuit module, and the output capacitor is connected in parallel with the rectifier circuit module; the output capacitor is connected to the output terminal, and the digital signal processing chip is connected to the output terminal;

[0018] When the power supply of the server loses power, the digital signal processing chip collects the actual output voltage value of the output terminal, and determines the increased conduction time of the switching tube in the working cycle of the buck circuit module according to the actual output voltage value, the desired output voltage value of the output terminal, the turns ratio of the first winding to the second winding, and the input voltage value of the auxiliary winding; and increases the conduction duration of the switching tube in the working cycle according to the increased conduction time.

[0019] In a fourth aspect, an embodiment of the present invention further provides an electronic device, including a processor;

[0020] A memory for storing executable instructions of the processor;

[0021] Among them, the processor is configured to execute the instructions to implement the method of the first aspect.

[0022] In a fifth aspect, an embodiment of the present invention further provides a computer-readable storage medium. When the instructions in the computer-readable storage medium are executed by a processor of an electronic device, the electronic device can execute the method of the first aspect.

[0023] In the embodiment of the present invention, based on the proportional relationship among the output voltage value of the adjustable DC transformer circuit, the voltage of the load capacitor, and the power-off maintenance time, when the main capacitor loses electrical energy due to power-off, through the buck circuit module, by increasing the conduction time, the conduction duration of the switching tube in the working cycle can be increased. Without increasing the specification of the main capacitor, the electrical energy loss in the load capacitor due to power-off can be compensated by increasing the electrical energy in the buck capacitor, ensuring the constant voltage of the load capacitor, and thus ensuring a stable and constant power-off maintenance time during power-off.

[0024] The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly, it can be implemented according to the content of the specification. In order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are hereinafter specifically described. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a circuit diagram of an adjustable DC transformer circuit provided by an embodiment of the present invention;

[0026] Figure 2 is a flowchart of the steps of a method for controlling the power-off maintenance time of a server provided by an embodiment of the present invention;

[0027] Figure 3 is a flowchart of the steps of another method for controlling the power-off maintenance time of a server provided by an embodiment of the present invention;

[0028] Figure 4 is a block diagram of a control device for the power-off maintenance time of a server provided by an embodiment of the present invention;

[0029] Figure 5 is a logic block diagram of an electronic device provided by an embodiment of the present invention;

[0030] Figure 6 is a logic block diagram of another electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention can be more thoroughly understood and the scope of the present invention can be completely conveyed to those skilled in the art.

[0032] To enable those skilled in the art to better understand the present invention, the concepts related to the present invention are described below:

[0033] Regulated DC Transformer (RDCX): A DC / DC conversion circuit, specifically including a buck circuit module, a buck capacitor, a main capacitor, a load capacitor, an inverter circuit module, a rectifier circuit module, and an output capacitor. This circuit is used to output a stable DC voltage. The buck circuit module can control the conduction duration of the switching tube therein to increase or decrease the voltage, so as to make up for the abnormal reduction or increase of the actual output voltage of the circuit, so that the circuit can output a stable DC voltage.

[0034] Power Supply Unit (PSU): A module that provides electrical energy for the normal operation of the server, and can maintain a normal output state for a period of time in the case of power failure, so as to meet the need for the server to quickly back up data after power failure.

[0035] Power failure: It refers to the situation where an electrical device cannot work properly due to power cut, power loss, or the quality of electricity not meeting the requirements.

[0036] Hold-up time: When the power supply of the server fails, the power supply maintains a normal output state through the electrical energy stored in the capacitor for a short period of time, so that the server can quickly back up data within this time after power failure. Its duration is usually from a few milliseconds to dozens of milliseconds.

[0037] Buck circuit module: A DC-DC converter, the main components of which include a switching tube, an inductor, a freewheeling diode, and a filter capacitor. Usually, the power supply voltage can be stepped down or stepped up by controlling the conduction and closing of the switching tube. The buck circuit module can be connected in parallel with a buck capacitor. The buck circuit module receives the input voltage through the auxiliary winding and controls the duty cycle of the circuit module itself based on the conduction or closing control of the switching tube in the buck circuit module, so as to increase or decrease the output voltage of the buck circuit module, and further achieve the purpose of adjusting the voltage value across the buck capacitor.

[0038] Inverter circuit module: It is used to convert the input direct current into alternating current, and transfer the alternating current to the second winding corresponding to the rectifier circuit module through the first winding corresponding to the inverter circuit module.

[0039] Rectifier circuit module: It is used to convert the input alternating current into direct current. Specifically, the rectifier circuit module receives the alternating current transmitted by the inverter circuit module through the first winding through the corresponding second winding.

[0040] Duty cycle: In a pulse cycle, the proportion of the energization time relative to the total time.

[0041] Digital Signal Processing (DSP) chip: A unique microprocessor, which is a device that processes a large amount of information with digital signals. Its working principle is to receive analog signals, convert them into digital signals of 0 or 1, and then perform transformation or filtering processing on the digital signals to obtain the required output signals.

[0042] In the embodiment of the present invention, referring to Figure 1 , it shows the circuit diagram of an adjustable DC transformer circuit provided by the embodiment of the present invention, including: buck circuit module, buck capacitor (Cbuck), main capacitor (bulkcap), load capacitor (cin), inverter circuit module, rectifier circuit module, output capacitor (Cv), digital signal processing chip (dsp); the buck capacitor (Cbuck) is connected in series with the main capacitor (bulkcap), the buck capacitor (Cbuck) is grounded, the buck circuit module is connected in parallel with the buck capacitor (Cbuck), and the buck circuit module obtains the input voltage through the auxiliary winding (Na); the main capacitor (bulkcap) is connected in series with the load capacitor (cin), the load capacitor (cin) is grounded, and the inverter circuit module is connected in parallel with the load capacitor (cin); the first winding (Np) of the inverter circuit module is mutually coupled with the second winding (Ns) of the rectifier circuit module, and the output capacitor (Cv) is connected in parallel with the rectifier circuit module; the output capacitor (Cv) is connected to the output terminal, and the digital signal processing chip (dsp) is connected to the output terminal.

[0043] Figure 2 , which is the step flowchart of a control method for the power-off maintenance time of a server provided by the embodiment of the present invention. Figure 2 The described step flow is based on Figure 1 The described adjustable DC transformer circuit is implemented. As Figure 2 shown, this method may include:

[0044] Step 101: When the power supply of the server is powered off, collect the actual output voltage value of the adjustable DC transformer circuit of the power supply.

[0045] In the embodiment of the present invention, the power failure of the server means that the power supply cannot work properly due to power cut, power loss, or the power quality not meeting the requirements. Specifically, referring to Figure 1 , the circuit has two inputs. One input is the voltage input of the auxiliary winding Na, and the other is the voltage input of the main capacitor (bulk cap). When the power supply fails, the voltage input of the main capacitor (bulk cap) will be lost, resulting in a decrease in the electrical energy stored in the main capacitor (bulk cap). And the decrease in the electrical energy stored in the main capacitor (bulk cap) will cause a decrease in the electrical energy in the load capacitor (cin) (the voltage of the load capacitor cin = the voltage of the main capacitor bulk cap + the voltage of the buck capacitor Cbuck), which in turn causes a decrease in the output voltage value Vout output by the output capacitor (Cv). And the output voltage value Vout of the circuit is in a proportional relationship with the power failure maintenance time of the power supply. The larger the output voltage value Vout, the longer the power failure maintenance time of the power supply; the smaller the output voltage value Vout, the shorter the power failure maintenance time of the power supply.

[0046] Therefore, based on the above inference, when the power supply fails, the output voltage value Vout of the circuit decreases, resulting in a shorter power failure maintenance time and reducing the time required for data backup when the server fails. To solve this problem, the related art can improve the specifications (capacitance value, volume, power, etc.) of the main capacitor (bulk cap), so as to make up for the power loss of the main capacitor (bulk cap) caused by power failure through the main capacitor (bulk cap) that stores more electrical energy. However, this solution has a greater impact on the assembly space inside the power supply and is more costly.

[0047] In the embodiment of the present invention, based on Figure 1 the inference of the adjustable DC transformer circuit, the output voltage value Vout is in a proportional relationship with the voltage of the load capacitor cin. The voltage of the load capacitor cin = the voltage of the main capacitor bulk cap + the voltage of the buck capacitor Cbuck. When the main capacitor (bulk cap) loses electrical energy due to power failure, by increasing the electrical energy in the buck capacitor Cbuck to make up for the loss, the voltage of the load capacitor cin can be ensured to be constant, reducing the loss of the electrical energy in the load capacitor cin caused by power failure, and thus ensuring a stable and constant power failure maintenance time even during power failure.

[0048] Specifically, referring to Figure 1Since the output voltage value Vout is directly proportional to the power-down maintenance time, the actual output voltage value of the adjustable DC transformer circuit can be collected through the dsp chip. Subsequently, the actual output voltage value can be used to calculate the difference from the expected output voltage value of the adjustable DC transformer circuit, so as to reflect the magnitude of the voltage loss of the output voltage value Vout due to power-down according to the difference. The magnitude of this voltage loss is used to perform relevant calculations in the subsequent control of boosting the buck capacitor Cbuck.

[0049] Step 102: Determine the increased conduction time of the switch tube in the buck circuit module of the adjustable DC transformer circuit during the working cycle according to the actual output voltage value, the expected output voltage value, the turns ratio, and the input voltage value of the auxiliary winding of the adjustable DC transformer circuit.

[0050] In the embodiment of the present invention, referring to Figure 1 , the turns ratio is the ratio of the first winding Np to the second winding Ns. The turns ratio is a fixed value formed after the design of the adjustable DC transformer circuit is completed. The output voltage value can be used to calculate the difference from the expected output voltage value, and the difference can reflect the magnitude of the voltage loss of the output voltage value Vout due to power-down. Further, according to the turns ratio, the difference, and the input voltage value of the auxiliary winding, the increased conduction time of the switch tube in the buck circuit module of the adjustable DC transformer circuit during the working cycle is jointly calculated.

[0051] Specifically, Figure 1 the buck circuit module in is a DC-DC converter, and its main components include a switch tube, an inductor, a freewheeling diode, and a filter capacitor. Usually, the power supply can be stepped down or stepped up by controlling the on and off of the switch tube. After the output voltage of the buck circuit module is increased, the voltage across the buck capacitor Cbuck connected in parallel with the buck circuit module also increases accordingly, so that the electrical energy in the buck capacitor Cbuck increases, thereby making up for the loss of electrical energy in the load capacitor cin due to power-down (specifically, the electrical energy loss of the main capacitor (bulk cap)).

[0052] In the embodiment of the present invention, the buck circuit module can adjust the conduction time of the switch tube included in the buck circuit module within a working cycle based on the calculated increased conduction time, so as to perform a boosting operation on the voltage input to the auxiliary winding Na by adjusting the duty cycle of the buck circuit module, and output the increased voltage to the buck capacitor Cbuck.

[0053] Step 103: Increase the conduction duration of the switch tube in the working cycle according to the increased conduction time, so as to maintain the power-down maintenance time of the power supply within a preset time range when the power supply of the server is powered down.

[0054] In an embodiment of the present invention, referring to Figure 1 , for the buck circuit module of the adjustable DC transformer circuit, by increasing the conduction time, the conduction duration of the switching tube in the working cycle can be increased, the duty ratio of the buck circuit module can be increased, so as to boost the voltage input by the auxiliary winding Na, and output the increased voltage to the buck capacitor Cbuck, so that the electric energy stored in the buck capacitor Cbuck is increased. This increased electric energy can make up for the electric energy loss generated by the power-down in the load capacitor cin, ensure a constant and stable output voltage value Vout, and further ensure a stable and constant power-down maintenance time during power-down.

[0055] Optionally, step 101 can be specifically implemented by collecting the actual output voltage value of the adjustable DC transformer circuit through a digital signal processing chip.

[0056] Optionally, step 102 can be specifically implemented by outputting a control signal through the digital signal processing chip when the difference between the actual output voltage value and the desired output voltage value is greater than a preset threshold; in response to the output control signal, determining the increased conduction time according to the difference, the turns ratio, and the input voltage value of the auxiliary winding.

[0057] In an embodiment of the present invention, a digital signal processing (DSP) chip can receive an analog signal, convert it into a digital signal of 0 or 1, and then perform transformation or filtering processing on the digital signal to obtain the required output signal. The digital signal processing chip can have a detection probe connected to the output end of the adjustable DC transformer circuit for detecting the output voltage value Vout of the adjustable DC transformer circuit. Therefore, in an embodiment of the present invention, a digital signal processing chip can be used to collect the actual output voltage value of the adjustable DC transformer circuit.

[0058] Further, when the difference between the actual output voltage value and the desired output voltage value is greater than a preset threshold (adjustable according to actual conditions), the digital signal processing chip can determine that there is a phenomenon of the output voltage value Vout decreasing due to power-down. At this time, the digital signal processing chip can output a control signal to the adjustable DC transformer circuit, so that the adjustable DC transformer circuit responds to the output control signal and determines the increased conduction time according to the difference, the turns ratio, and the input voltage value of the auxiliary winding, thereby realizing the operation logic of the control method for the power-down maintenance time of the server.

[0059] In summary, in the embodiments of the present invention, based on the proportional relationship among the output voltage value of the adjustable DC transformer circuit, the voltage of the load capacitor, and the power-down maintenance time, when the main capacitor loses electrical energy due to power-down, through the buck circuit module, by increasing the conduction time, the conduction duration of the switching tube in the working cycle can be increased. Without increasing the specification of the main capacitor, the electrical energy in the buck capacitor can be increased to make up for the electrical energy loss in the load capacitor due to power-down, ensuring that the voltage of the load capacitor is constant, and further ensuring a stable and constant power-down maintenance time during power-down.

[0060] Figure 3 FIG. is a flowchart of steps of another method for controlling the power-down maintenance time of a server provided by an embodiment of the present invention. As Figure 3 shown, the method may include:

[0061] Step 201, when the power supply of the server loses power, collect the actual output voltage value of the adjustable DC transformer circuit of the power supply.

[0062] This step may specifically refer to the above step 101 and will not be elaborated here.

[0063] Step 202, according to the actual output voltage value, the expected output voltage value and the turns ratio of the adjustable DC transformer circuit, determine the voltage increase amount of the buck capacitor connected in parallel with the buck circuit module in the adjustable DC transformer circuit.

[0064] In the embodiments of the present invention, referring to Figure 1 , the voltage of the load capacitor Cin = the voltage of the main capacitor Bulk Cap + the voltage of the buck capacitor Cbuck. During power-down, the voltage of the main capacitor Bulk Cap drops, causing the voltage of the load capacitor Cin to drop, resulting in a drop in the output voltage value Vout, and further causing a drop in the power-down maintenance time. Therefore, in order to maintain a normal and stable power-down maintenance time during power-down, it is necessary to keep the voltage of the load capacitor Cin unchanged compared to before power-down. Therefore, it is necessary to increase the voltage of the buck capacitor Cbuck to make up for the loss of electrical energy in the load capacitor Cin due to power-down (specifically, the electrical energy loss of the main capacitor (Bulk Cap)).

[0065] Specifically, the output voltage value can be calculated by taking the difference from the expected output voltage value, so as to reflect the magnitude of the voltage loss of the output voltage value Vout due to power-down according to the difference. Further, the difference and the turns ratio can be jointly used to calculate the voltage increase amount of the buck capacitor connected in parallel with the buck circuit module in the adjustable DC transformer circuit. That is, the adjustable DC transformer circuit needs to increase the voltage value at both ends of the buck capacitor by this voltage increase amount to ensure that the voltage of the load capacitor Cin remains unchanged compared to before power-down.

[0066] Optionally, step 202 may specifically include:

[0067] Sub-step 2021: Calculate the difference between the actual output voltage value and the desired output voltage value.

[0068] Sub-step 2022: Use the product value of the difference and the turns ratio as the voltage increase of the buck capacitor.

[0069] In the embodiment of the present invention, for sub-steps 2021-2022, the product value of the difference between the actual output voltage value and the desired output voltage value and the turns ratio can be used as the voltage increase of the buck capacitor. Subsequently, the buck circuit module needs to control its own duty cycle to increase the output voltage value of the buck circuit module, so that the voltage value across the buck capacitor increases.

[0070] Step 203: Determine the increased conduction time according to the voltage increase of the buck capacitor and the input voltage value of the auxiliary winding in the adjustable DC transformer circuit.

[0071] In the embodiment of the present invention, the voltage increase of the buck capacitor and the input voltage value of the auxiliary winding in the adjustable DC transformer circuit can further calculate the increased conduction time, so that the buck circuit module can subsequently increase the conduction duration of the switching tube in the working cycle according to the increased conduction time, thereby realizing the increase of its own duty cycle, and further increasing the voltage value across the buck capacitor.

[0072] Optionally, step 203 may specifically include:

[0073] Sub-step 2031: Use the ratio of the voltage increase of the buck capacitor to the input voltage value of the auxiliary winding as the duty cycle increase of the buck circuit module.

[0074] Sub-step 2032: Use the product of the duty cycle increase and the working cycle as the increased conduction time.

[0075] In the embodiment of the present invention, for sub-steps 2031-2032, the ratio of the voltage increase of the buck capacitor to the input voltage value of the auxiliary winding Na can be used as the duty cycle increase of the buck circuit module. Furthermore, the product of the duty cycle increase and the working cycle can be used as the increased conduction time, which can enable the buck circuit module to subsequently increase the conduction duration of the switching tube in the working cycle according to the increased conduction time, thereby realizing the increase of its own duty cycle, increasing the voltage value across the buck capacitor, compensating for the loss of electrical energy in the load capacitor cin due to power-off, and ensuring a stable and constant power-off maintenance time during power-off.

[0076] Step 204: Increase the conduction duration of the switching transistor in the working cycle according to the conduction increase time, so as to maintain the power-off duration of the power supply within a preset time range when the power supply of the server loses power.

[0077] This step can specifically refer to step 103 above and will not be elaborated here.

[0078] Optionally, the capacitance value of the buck capacitor remains unchanged at a preset capacitance value; the volume of the buck capacitor remains unchanged at a preset volume.

[0079] In the embodiment of the present invention, the buck circuit module can increase its own duty cycle, so as to increase the electric energy in the buck capacitor to make up for the electric energy loss generated in the load capacitor due to power-off, so as to ensure a stable and constant power-off duration. Therefore, during the life cycle of the adjustable DC transformer circuit, it can be ensured that the capacitance value of the main capacitor remains unchanged at a preset capacitance value, the volume of the main capacitor remains unchanged at a preset volume, and the power of the main capacitor remains unchanged at a preset power; thus solving the problem of the increase in cost and occupied space caused by improving the specifications of the main capacitor in the related art.

[0080] Optionally, before step 201, the method may further include:

[0081] Step 205: Obtain the expected power-off duration.

[0082] Step 206: Determine the target turn ratio corresponding to the expected power-off duration according to the corresponding relationship between the preset turn ratio and the power-off duration.

[0083] Step 207: Set the turn ratio of the auxiliary winding of the adjustable DC transformer circuit to the second winding of the rectifier circuit module in the adjustable DC transformer circuit as the target turn ratio.

[0084] In the embodiment of the present invention, for steps 205-207, when designing the circuit of the adjustable DC transformer circuit, the following energy conservation principle formula 1 can be used and based on the set conditions: the capacitance value of the main capacitor bulk cap is 910 uF, the output voltage is 54 V, the transformer turn ratio Np:Ns = 8:1, the full-load output power is 4200 W, and the efficiency is 98% for calculation, so as to obtain Table 1:

[0085] Formula 1:

[0086] Among them, C is the capacitance value of the main capacitor bulk cap; Vbulk_max is the maximum output voltage of the buck circuit module (corresponding to the duty cycle D = 0.9); bulk_min is the minimum output voltage of the buck circuit module (corresponding to the duty cycle D = 0.1); Po is the output power of the adjustable DC transformer circuit; T hold-up is the power-down maintenance time; γ is the attenuation coefficient of the main capacitor bulk cap, generally taken as 0.8; η is a preset coefficient.

[0087]

[0088] Table 1

[0089] Regarding Table 1, Vo is the output voltage of the adjustable DC transformer circuit; Vin is the input voltage of the adjustable DC transformer circuit ( Figure 1 the voltage across the load capacitor cin in); N is the turns ratio of the transformer ( Figure 1 Np / Ns in), Nbuck is Figure 1 the ratio of the auxiliary winding Na to the second winding Ns in (Nbuck = voltage of the auxiliary winding Na / Vout). Vbuck_in is the voltage of the auxiliary winding Na, that is, the input voltage of the buck circuit module; Po is the output power of the adjustable DC transformer circuit; eff is the circuit efficiency of the adjustable DC transformer circuit; C is the capacitance value of the main capacitor bulk cap; Vbulk_max is the maximum output voltage of the buck circuit module (corresponding to the duty cycle D = 0.9); bulk_min is the minimum output voltage of the buck circuit module (corresponding to the duty cycle D = 0.1); Vpfc_min is the minimum voltage across the main capacitor bulk cap; Vpfc_max is the maximum voltage across the main capacitor bulk cap; T is the power-down maintenance time.

[0090] It can be seen from the above table that when the capacitance value of the main capacitor bulk cap remains fixed, as Nbuck (auxiliary winding Na / second winding Ns) increases, the T of the power supply hold-up will increase significantly accordingly. Therefore, when designing the circuit, the desired power-down maintenance time can be obtained. According to the corresponding relationship between the preset turns ratio and the power-down maintenance time, the target turns ratio corresponding to the desired power-down maintenance time can be determined, and the turns ratio of the auxiliary winding of the adjustable DC transformer circuit to the second winding of the rectifier circuit module in the adjustable DC transformer circuit can be set as the target turns ratio.

[0091] For example, when Nbuck changes from 2 turns to 3 turns, the power-down maintenance time increases by approximately 40%; when changing from 2 turns to 8 turns, the power-down maintenance time increases from 5.55 ms to 12.68 ms. After the power supply drops out, the larger the input turn ratio Nbuck of the buck circuit module is, and with the adjustment of the duty cycle, the stronger the ability of the output of the buck circuit module to raise the voltage across the buck capacitor. Additionally, when the power-down maintenance time is fixed, by adjusting the input voltage and duty cycle of the buck circuit module, the capacitance value and volume of the main capacitor bulk cap can be reduced, and the power density of the server power supply can be improved.

[0092] Furthermore, for Figure 1 the adjustable DC transformer circuit shown. When the power supply of the server drops out, the digital signal processing chip (dsp) collects the actual output voltage value (Vout) at the output end, and based on the actual output voltage value, as well as the desired output voltage value at the output end, the turn ratio of the primary winding (Np) to the secondary winding (Ns), and the input voltage value of the auxiliary winding (Na), determines the increased conduction time of the switching tube in the buck circuit module during the working cycle; and according to the increased conduction time, increases the conduction duration of the switching tube in the working cycle, which can, without increasing the specification of the main capacitor, make up for the power loss in the load capacitor due to power-down by increasing the electrical energy in the buck capacitor, ensure the voltage of the load capacitor is constant, and thus ensure a stable and constant power-down maintenance time even during power-down.

[0093] In summary, in the embodiments of the present invention, based on the proportional relationship among the output voltage value of the adjustable DC transformer circuit, the voltage of the load capacitor, and the power-down maintenance time, when the main capacitor loses electrical energy due to power-down, through the buck circuit module, by increasing the conduction duration of the switching tube in the working cycle according to the increased conduction time, it is possible to, without increasing the specification of the main capacitor, make up for the power loss in the load capacitor due to power-down by increasing the electrical energy in the buck capacitor, ensure the voltage of the load capacitor is constant, and thus ensure a stable and constant power-down maintenance time even during power-down.

[0094] Figure 4 is a block diagram of a control device for the power-down maintenance time of a server provided by an embodiment of the present invention. The device includes:

[0095] An acquisition module 301, configured to collect the actual output voltage value of the adjustable DC transformer circuit of the power supply when the power supply of the server drops out;

[0096] A calculation module 302, configured to determine an increased conduction time of a switching transistor in a buck circuit module of the adjustable DC transformer circuit during a working cycle according to the actual output voltage value, the desired output voltage value, the turns ratio, and the input voltage value of the auxiliary winding of the adjustable DC transformer circuit;

[0097] An adjustment module 303, configured to increase the conduction duration of the switching transistor during the working cycle according to the increased conduction time, so as to maintain the power-off duration of the power supply within a preset time range when the power supply of the server is powered off.

[0098] Optionally, the calculation module 302 includes:

[0099] A first calculation sub-module, configured to determine a voltage increase amount of a buck capacitor connected in parallel with the buck circuit module in the adjustable DC transformer circuit according to the actual output voltage value, the desired output voltage value, and the turns ratio of the adjustable DC transformer circuit;

[0100] A second calculation sub-module, configured to determine the increased conduction time according to the voltage increase amount of the buck capacitor and the input voltage value of the auxiliary winding in the adjustable DC transformer circuit.

[0101] Optionally, the first calculation sub-module includes:

[0102] A first calculation unit, configured to calculate a difference between the actual output voltage value and the desired output voltage value;

[0103] A second calculation unit, configured to use the product value of the difference and the turns ratio as the voltage increase amount of the buck capacitor.

[0104] Optionally, the second calculation sub-module includes:

[0105] A third calculation unit, configured to use the ratio of the voltage increase amount of the buck capacitor to the input voltage value of the auxiliary winding as an increased duty ratio amount of the buck circuit module;

[0106] A fourth calculation unit, configured to use the product of the increased duty ratio amount and the working cycle as the increased conduction time.

[0107] Optionally, the acquisition module 301 includes:

[0108] A signal acquisition sub-module, configured to acquire the actual output voltage value of the adjustable DC transformer circuit through a digital signal processing chip;

[0109] The calculation module 302 includes:

[0110] A control sub-module, configured to output a control signal through the digital signal processing chip when the difference between the actual output voltage value and the desired output voltage value is greater than a preset threshold;

[0111] An output sub-module, configured to determine the increased conduction time in response to the output control signal according to the difference, the turns ratio, and the input voltage value of the auxiliary winding.

[0112] Optionally, the capacitance value of the main capacitor remains unchanged at a preset capacitance value; the volume of the main capacitor remains unchanged at a preset volume.

[0113] Optionally, the device further includes:

[0114] An acquisition module, configured to acquire a desired power-off maintenance time;

[0115] A matching module, configured to determine a target turns ratio corresponding to the desired power-off maintenance time according to a preset correspondence between the turns ratio and the power-off maintenance time;

[0116] A setting module, configured to set the turns ratio of the auxiliary winding of the adjustable DC transformer circuit to the second winding of the rectifier circuit module in the adjustable DC transformer circuit as the target turns ratio.

[0117] In summary, in the embodiment of the present invention, based on the proportional relationship among the output voltage value of the adjustable DC transformer circuit, the voltage of the load capacitor, and the power-off maintenance time, when the main capacitor loses electrical energy due to power-off, through the buck circuit module, the conduction duration of the switching tube in the working cycle is increased according to the increased conduction time, so that the electrical energy loss generated in the load capacitor due to power-off can be compensated by increasing the electrical energy in the buck capacitor without increasing the specification of the main capacitor, ensuring the constant voltage of the load capacitor, and further ensuring a stable and constant power-off maintenance time during power-off.

[0118] Figure 5 FIG. is a block diagram of an electronic device 600 shown according to an exemplary embodiment. For example, the electronic device 600 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0119] Refer to Figure 5 , the electronic device 600 may include one or more of the following components: a processing component 602, a memory 604, a power supply component 606, a multimedia component 608, an audio component 610, an input / output (I / O) interface 612, a sensor component 614, and a communication component 616.

[0120] The processing component 602 generally controls the overall operation of the electronic device 600, such as operations associated with display, telephone calls, data communication, camera operations, and recording operations. The processing component 602 may include one or more processors 620 to execute instructions to complete all or part of the steps of the above methods. In addition, the processing component 602 may include one or more modules to facilitate the interaction between the processing component 602 and other components. For example, the processing component 602 may include a multimedia module to facilitate the interaction between the multimedia component 608 and the processing component 602.

[0121] The memory 604 is used to store various types of data to support the operation of the electronic device 600. Examples of such data include instructions for any application or method operating on the electronic device 600, contact data, phone book data, messages, pictures, multimedia, and the like. The memory 604 may be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk, or optical disk.

[0122] The power component 606 provides power to various components of the electronic device 600. The power component 606 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the electronic device 600.

[0123] The multimedia component 608 includes a screen that provides an output interface between the electronic device 600 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may sense not only the boundaries of touch or swipe actions but also detect the duration and pressure associated with the touch or swipe operations. In some embodiments, the multimedia component 608 includes a front camera and / or a rear camera. When the electronic device 600 is in an operating mode, such as a shooting mode or a multimedia mode, the front camera and / or the rear camera may receive external multimedia data. Each of the front camera and the rear camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0124] The audio component 610 is used to output and / or input audio signals. For example, the audio component 610 includes a microphone (MIC) that is used to receive external audio signals when the electronic device 600 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signal can be further stored in the memory 604 or sent via the communication component 616. In some embodiments, the audio component 610 further includes a speaker for outputting audio signals.

[0125] The I / O interface 612 provides an interface between the processing component 602 and a peripheral interface module, and the peripheral interface module can be a keyboard, a click wheel, buttons, etc. These buttons can include, but are not limited to: a home button, a volume button, a power button, and a lock button.

[0126] The sensor component 614 includes one or more sensors for providing status assessments of various aspects of the electronic device 600. For example, the sensor component 614 can detect the on / off state of the electronic device 600, the relative positioning of components, such as the display and keypad of the electronic device 600. The sensor component 614 can also detect a change in the position of the electronic device 600 or a component of the electronic device 600, the presence or absence of user contact with the electronic device 600, the orientation or acceleration / deceleration of the electronic device 600, and the temperature change of the electronic device 600. The sensor component 614 can include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor component 614 can also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor component 614 can further include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0127] The communication component 616 is used to facilitate communication between the electronic device 600 and other devices in a wired or wireless manner. The electronic device 600 can access a wireless network based on a communication standard, such as WiFi, a carrier network (such as 2G, 3G, 4G, or 5G), or a combination thereof. In an exemplary embodiment, the communication component 616 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 616 further includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0128] In an exemplary embodiment, the electronic device 600 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components, and is used to implement a control method for the power-off maintenance time of a server provided in the embodiments of the present application.

[0129] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is further provided, such as a memory 604 including instructions. The above instructions can be executed by a processor 620 of the electronic device 600 to complete the above method. For example, the non-transitory storage medium may be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, or the like.

[0130] Figure 6 FIG. is a block diagram of an electronic device 700 shown according to an exemplary embodiment. For example, the electronic device 700 may be provided as a server. Referring to Figure 6 , the electronic device 700 includes a processing component 722, which further includes one or more processors, and memory resources represented by a memory 732 for storing instructions executable by the processing component 722, such as application programs. The application programs stored in the memory 732 may include one or more modules each corresponding to a set of instructions. In addition, the processing component 722 is configured to execute instructions to perform a control method for the power-off maintenance time of a server provided in the embodiments of the present application.

[0131] The electronic device 700 may further include a power supply component 726 configured to perform power management of the electronic device 700, a wired or wireless network interface 750 configured to connect the electronic device 700 to a network, and an input / output (I / O) interface 758. The electronic device 700 may operate based on an operating system stored in the memory 732, such as WindowsServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM, or the like.

[0132] The embodiments of the present application further provide a computer program product, including a computer program, where the computer program implements the control method for the power-off maintenance time of the server when executed by a processor.

[0133] Other embodiments of the present application will be readily apparent to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include known common general knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and examples are only to be considered as exemplary, and the true scope and spirit of the present application are pointed out by the following claims.

[0134] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

Claims

1. A control method for the power-off maintenance time of a server, characterized in that, The method includes: When the power supply of the server loses power, collecting the actual output voltage value of the adjustable DC transformer circuit of the power supply; According to the actual output voltage value, as well as the expected output voltage value, turns ratio and input voltage value of the auxiliary winding of the adjustable DC transformer circuit, determining the increase amount of the duty cycle of the buck circuit module, and according to the increase amount of the duty cycle and the working cycle of the switching tube, determining the increased conduction time of the switching tube in the buck circuit module of the adjustable DC transformer circuit during the working cycle; According to the increased conduction time, increasing the conduction duration of the switching tube during the working cycle, so as to perform a voltage boosting operation on the voltage input to the auxiliary winding Na by adjusting the duty cycle of the buck circuit module, and outputting the increased voltage to the buck capacitor Cbuck, so that the electric energy stored in the buck capacitor Cbuck is increased. This increased electric energy can make up for the electric energy loss generated in the load capacitor cin due to power loss, so that when the power supply of the server loses power, the capacitance value of the main capacitor and the volume of the main capacitor are maintained at preset values unchanged, and the power loss maintenance time of the power supply is maintained within a preset time range.

2. The control method for the power-off maintenance time of the server according to claim 1, characterized in that The step of determining the increase amount of the duty cycle of the buck circuit module according to the actual output voltage value, as well as the expected output voltage value, turns ratio and input voltage value of the auxiliary winding of the adjustable DC transformer circuit, and determining the increased conduction time of the switching tube in the buck circuit module of the adjustable DC transformer circuit during the working cycle according to the increase amount of the duty cycle and the working cycle of the switching tube includes: According to the actual output voltage value, as well as the expected output voltage value and turns ratio of the adjustable DC transformer circuit, determining the voltage increase amount of the buck capacitor connected in parallel with the buck circuit module in the adjustable DC transformer circuit; According to the voltage increase amount of the buck capacitor and the input voltage value of the auxiliary winding in the adjustable DC transformer circuit, determining the increased conduction time.

3. The control method for the power-off maintenance time of a server according to claim 2, wherein The step of determining the voltage increase amount of the buck capacitor connected in parallel with the buck circuit module in the adjustable DC transformer circuit according to the actual output voltage value, as well as the expected output voltage value and turns ratio of the adjustable DC transformer circuit includes: Calculating the difference between the actual output voltage value and the expected output voltage value; Taking the product value of the difference and the turns ratio as the voltage increase amount of the buck capacitor.

4. The control method for the power-off maintenance time of the server according to claim 2, characterized in that, The step of determining the increased conduction time according to the voltage increase amount of the buck capacitor and the input voltage value of the auxiliary winding in the adjustable DC transformer circuit includes: Taking the ratio of the voltage increase amount of the buck capacitor to the input voltage value of the auxiliary winding as the increase amount of the duty cycle of the buck circuit module; Taking the product of the increase amount of the duty cycle and the working cycle as the increased conduction time.

5. The control method for the power-off maintenance time of the server according to claim 1, wherein The step of collecting the actual output voltage value of the adjustable DC transformer circuit of the power supply includes: Collecting the actual output voltage value of the adjustable DC transformer circuit through a digital signal processing chip; Determining the increased conduction time of the switching transistor in the buck circuit module of the adjustable DC transformer circuit during the working cycle according to the actual output voltage value, the desired output voltage value, the turns ratio, and the input voltage value of the auxiliary winding of the adjustable DC transformer circuit includes: When the difference between the actual output voltage value and the desired output voltage value is greater than a preset threshold, output a control signal through the digital signal processing chip; In response to the output control signal, determine the increased conduction time according to the difference, the turns ratio, and the input voltage value of the auxiliary winding.

6. The control method for the server power-down maintenance time according to claim 1, wherein Before collecting the actual output voltage value of the adjustable DC transformer circuit of the power supply when the power supply of the server is powered off, the method further includes: Obtain the desired power-off maintenance time; According to the corresponding relationship between the preset turns ratio and the power-off maintenance time, determine the target turns ratio corresponding to the desired power-off maintenance time; Set the turns ratio of the auxiliary winding of the adjustable DC transformer circuit to the second winding of the rectifier circuit module in the adjustable DC transformer circuit to the target turns ratio.

7. A control device for maintaining the power-off duration of a server, characterized in that, The device includes: A collection module for collecting the actual output voltage value of the adjustable DC transformer circuit of the power supply when the power supply of the server is powered off; A calculation module for determining the increase in the duty cycle of the buck circuit module according to the actual output voltage value, the desired output voltage value, the turns ratio, and the input voltage value of the auxiliary winding of the adjustable DC transformer circuit, and determining the increased conduction time of the switching transistor in the buck circuit module of the adjustable DC transformer circuit during the working cycle according to the increase in the duty cycle and the working cycle of the switching transistor; An adjustment module for increasing the conduction duration of the switching transistor during the working cycle according to the increased conduction time, so as to perform a voltage boosting operation on the voltage input to the auxiliary winding Na by adjusting the duty cycle of the buck circuit module, and output the increased voltage to the buck capacitor Cbuck, so that the electric energy stored in the buck capacitor Cbuck is increased, and the increased electric energy can make up for the electric energy loss generated due to power-off in the load capacitor cin, so that when the power supply of the server is powered off, the capacitance value of the main capacitor and the volume of the main capacitor are kept at preset values unchanged, and the power-off maintenance time of the power supply is maintained within a preset time range.

8. An adjustable DC transformer circuit, connected to the power supply of the server, for implementing the method according to any one of claims 1-6, characterized in that, The circuit includes: A buck circuit module, a buck capacitor, a main capacitor, a load capacitor, an inverter circuit module, a rectifier circuit module, an output capacitor, and a digital signal processing chip; The buck capacitor is connected in series with the main capacitor, the buck capacitor is grounded, the buck circuit module is connected in parallel with the buck capacitor, and the buck circuit module obtains the input voltage through the auxiliary winding; the main capacitor is connected in series with the load capacitor, the load capacitor is grounded, and the inverter circuit module is connected in parallel with the load capacitor; the first winding of the inverter circuit module is magnetically coupled with the second winding of the rectifier circuit module, and the output capacitor is connected in parallel with the rectifier circuit module; the output capacitor is connected to the output terminal, and the digital signal processing chip is connected to the output terminal; In the case of power failure of the server power supply, the digital signal processing chip is used to collect the actual output voltage value of the output terminal, and according to the actual output voltage value, the desired output voltage value of the output terminal, the turn ratio of the first winding to the second winding, and the input voltage value of the auxiliary winding, determine the increased conduction time of the switching tube in the buck circuit module during the working cycle; and according to the increased conduction time, increase the conduction duration of the switching tube during the working cycle.

9. An electronic device, characterized in that, Comprising: A processor; A memory for storing instructions executable by the processor; wherein the processor is configured to execute the instructions to implement the method according to any one of claims 1 to 6.

10. A computer-readable storage medium, characterized in that, When the instructions in the computer-readable storage medium are executed by the processor of the electronic device, the electronic device is enabled to execute the method according to any one of claims 1 to 6.

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