Server power supply, server device and computing power system

Abstract

The application provides a server power supply, a server device and a computing power system, and relates to the technical field of server power supplies. The server power supply comprises an input end, an output end, a bridge circuit and an auxiliary switch network. The input end is used for receiving alternating current power. The output end is used for outputting direct current power. The bridge circuit is connected between the input end and the output end, and comprises a plurality of first switch tubes. The auxiliary switch network is connected with the bridge circuit, and comprises a plurality of second switch tubes. Each second switch tube is connected with a corresponding first switch tube, and the body diode of each second switch tube is arranged in a pair of tubes with the body diode of the corresponding first switch tube. The auxiliary switch network is used for converting alternating current power into direct current power in cooperation with the bridge circuit, and outputting the direct current power through the output end. The application can provide a new AI server power supply architecture.

Description

Technical Field

[0001] This application relates to the field of server power supply technology, and in particular to a server power supply, server device and computing system. Background Technology

[0002] Compared to traditional server power supplies, AI (artificial intelligence) server power supplies are designed to address the enormous power challenges brought about by the surge in AI computing power. Existing AI server power supplies are evolving towards 800V HVDC (high voltage direct current) power supplies, which places higher demands on the power conversion efficiency, power density, and reliability of the power supply architecture.

[0003] In traditional server power architectures, after AC power is input, it usually needs to be converted into DC power by independent rectifiers. Independent rectifiers not only increase the number of circuit components, leading to larger overall size and higher cost, but also generate additional conduction and switching losses in the power transmission path, reducing the overall power conversion efficiency of the power supply and making it difficult to meet the high power density and high efficiency requirements of AI servers.

[0004] Therefore, a new AI server power architecture and control method are needed to solve the above problems. Summary of the Invention

[0005] This application provides a server power supply, a server device, and a computing system, which can provide a new AI server power supply architecture.

[0006] In a first aspect, a server power supply is provided, comprising an input terminal, an output terminal, a bridge circuit, and an auxiliary switching network. The input terminal receives alternating current (AC) power. The output terminal outputs direct current (DC) power. The bridge circuit is connected between the input terminal and the output terminal, and includes a plurality of first switching transistors. The auxiliary switching network is connected to the bridge circuit and includes a plurality of second switching transistors, each second switching transistor being connected to a corresponding first switching transistor, and the body diode of each second switching transistor being paired with the body diode of a corresponding first switching transistor. The auxiliary switching network, in conjunction with the bridge circuit, converts the AC power into DC power and outputs the DC power through the output terminal.

[0007] In one possible implementation, the bridge circuit is a full-bridge circuit or a half-bridge circuit, and the number of the first switching transistors is either four or two. The number of the second switching transistors is equal to the number of the first switching transistors.

[0008] In one possible implementation, the input terminal includes a first positive terminal and a first negative terminal, the output terminal includes a second positive terminal and a second negative terminal, and the number of first switching transistors is four, wherein two first switching transistors are connected in series between the first positive terminal and the first negative terminal, the connection point between the two first switching transistors is connected to the second positive terminal, the other two first switching transistors are connected in series between the first positive terminal and the first negative terminal, the connection point between the other two first switching transistors is connected to the second negative terminal, and the two first switching transistors are connected in parallel with the other two first switching transistors.

[0009] In one possible implementation, the number of second switching transistors is four, with each second switching transistor connected in series with a corresponding first switching transistor. Wherein, at any given time, when the unidirectional conduction direction of the body diode of each first switching transistor is the same as or opposite to the direction of power transmission, the unidirectional conduction direction of the body diode of each second switching transistor is opposite to or the same as the direction of power transmission.

[0010] In one possible implementation, the server power supply further includes a control unit connected to the plurality of first switching transistors and the plurality of second switching transistors. The control unit is used to divide each cycle of the AC power into multiple time periods and control the duty cycle of each first switching transistor and each second switching transistor in the corresponding time period according to the AC voltage value corresponding to each time period.

[0011] In one possible implementation, the control unit is used to control the duty cycle of each second switch to be the same as the duty cycle of the corresponding first switch.

[0012] In one possible implementation, the AC voltage value is the average voltage value within each time period, or the average voltage value between the voltage value corresponding to the start point and the voltage value corresponding to the end point of each time period.

[0013] In one possible implementation, the server power supply further includes a transformer comprising a first winding and a second winding coupled together, the first winding being connected to the bridge circuit and the second winding being connected to the output terminal.

[0014] Secondly, a server device is also provided, comprising a load and a server power supply. The server power supply provides DC power to the load. The server power supply includes an input terminal, an output terminal, a bridge circuit, and an auxiliary switching network. The input terminal receives AC power. The output terminal outputs DC power. The bridge circuit is connected between the input terminal and the output terminal, and includes a plurality of first switching transistors. The auxiliary switching network is connected to the bridge circuit, and includes a plurality of second switching transistors, each second switching transistor being connected to a corresponding first switching transistor, and the body diode of each second switching transistor being paired with the body diode of a corresponding first switching transistor. The auxiliary switching network, in conjunction with the bridge circuit, converts the AC power into DC power and outputs the DC power through the output terminal.

[0015] Thirdly, a computing power system is also provided, comprising a power supply device and a server device. The power supply device outputs AC power, and the server device performs calculations based on the AC power. The server device includes a load and a server power supply. The server power supply provides DC power to the load.

[0016] The server power supply, server device, and computing system disclosed in this application, by adding an auxiliary switching network to a bridge circuit and utilizing a pair configuration of the body diodes of the second and first switching transistors, allows AC power to be directly converted into DC power without the need for independent rectifiers. This architecture eliminates the rectifiers found in traditional power supply architectures, reduces the number of power devices, lowers conduction losses and device costs, and effectively improves the power density and conversion efficiency of the power supply. It is better suited to meet the high power density and high efficiency requirements of AI servers evolving towards 800V high-voltage DC. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the background art, the accompanying drawings used in the embodiments of this application or the background art will be described below.

[0018] Figure 1 This is a schematic diagram of the server power supply in some embodiments of this application.

[0019] Figure 2 This is another schematic diagram of the server power supply in some embodiments of this application.

[0020] Figure 3 This is a schematic diagram of a server device in some embodiments of this application.

[0021] Figure 4This is a schematic diagram of a computing system in some embodiments of this application.

[0022] Explanation of reference numerals in the attached diagram: 10, Server power supply; 100, Input terminal; I1, First positive terminal; O1, First negative terminal; 200, Output terminal; I2, Second positive terminal; O2, Second negative terminal; 300, Bridge circuit; Q1, First switching transistor; 400, Auxiliary switching network; Q2, Second switching transistor; 500, Control unit; 600, Transformer; 20, Load; 1, Server device; 2, Power supply device; 3, Computing system. Detailed Implementation The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0023] In the description of the embodiments of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] In the description of the embodiments of this application, it should be noted that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0025] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or server that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such processes, methods, products, or devices.

[0026] Please see Figure 1 , Figure 1 This is a schematic diagram of the server power supply in some embodiments of this application. For example... Figure 1As shown, this application provides a server power supply 10, which includes an input terminal 100, an output terminal 200, a bridge circuit 300, and an auxiliary switching network 400. The input terminal 100 receives AC power. The output terminal 200 outputs DC power. The bridge circuit 300 is connected between the input terminal 100 and the output terminal 200, and includes a plurality of first switching transistors Q1. The auxiliary switching network 400 is connected to the bridge circuit 300 and includes a plurality of second switching transistors Q2. Each second switching transistor Q2 is correspondingly connected to a first switching transistor Q1, and the body diode of each second switching transistor Q2 is paired with the body diode of the corresponding first switching transistor Q1. The auxiliary switching network 400 works in conjunction with the bridge circuit 300 to convert AC power into DC power and outputs the DC power through the output terminal 200.

[0027] Therefore, the server power supply 10 described in this application, by adding an auxiliary switching network 400 to the bridge circuit 300 and utilizing the body diodes of the second switching transistor Q2 and the first switching transistor Q1 in a paired configuration, allows AC power to be directly converted into DC power without passing through an independent rectifier. This architecture eliminates the rectifier in traditional power supply architectures, reduces the number of power devices, lowers conduction losses and device costs, and effectively improves the power density and conversion efficiency of the power supply. It can better meet the high power density and high efficiency requirements of AI servers evolving towards 800V high-voltage DC.

[0028] In this configuration, the body diodes are arranged in pairs, meaning that the unidirectional conduction direction of the body diode of each second switch Q2 is opposite to the unidirectional conduction direction of the body diode of the corresponding first switch Q1. When the anode-to-cathode direction of the body diode of the first switch Q1 is the same as or opposite to the direction of power transmission, the anode-to-cathode direction of the body diode of the second switch Q2 is either opposite to or the same as the direction of power transmission.

[0029] In some embodiments, the bridge circuit 300 is a full-bridge circuit or a half-bridge circuit, and the number of the first switching transistors Q1 is four or two. The number of the second switching transistors Q2 is equal to the number of the first switching transistors Q1.

[0030] Therefore, the bridge circuit 300 of the server power supply 10 described above in this application can be configured as a full bridge or a half bridge according to the actual power level requirements, and the number of corresponding switching transistors can be adjusted accordingly, so that the power supply architecture can be flexibly adapted to AI server power supplies 10 with different power specifications, taking into account both conversion efficiency and device cost.

[0031] Specifically, the full-bridge topology is suitable for AI server scenarios with higher power levels, while the half-bridge topology is suitable for scenarios with relatively lower power levels or those that are more cost-sensitive.

[0032] like Figure 1 As shown, the input terminal 100 includes a first positive terminal I1 and a first negative terminal O1, and the output terminal 200 includes a second positive terminal I2 and a second negative terminal O2. There are four first switching transistors Q1, two of which are connected in series between the first positive terminal I1 and the first negative terminal O1, and the connection point between the two first switching transistors Q1 is connected to the second positive terminal I2. The other two first switching transistors Q1 are connected in series between the first positive terminal I1 and the first negative terminal O1, and the connection point between the other two first switching transistors Q1 is connected to the second negative terminal O2. Furthermore, two of the first switching transistors Q1 are connected in parallel with the other two first switching transistors Q1.

[0033] Therefore, the server power supply 10 described above in this application, through a full-bridge topology with two series-connected switch circuits in parallel, can form a complete power transmission path in both the positive and negative half-cycles of AC power, ensuring the continuity of power conversion and the stability of DC output, and meeting the high requirements for power quality in AI computing.

[0034] Furthermore, the body diode inherent in a switching transistor (such as a MOSFET) may conduct undesirably under certain operating conditions due to reverse recovery characteristics or voltage stress, creating a current return path. By connecting the body diodes of two switching transistors in reverse series, when one body diode may be mis-conducting, the other body diode is in a reverse cutoff state, thereby blocking the current return path and preventing damage to the switching transistor and power loss.

[0035] Specifically, the body diodes of each first switch Q1 and each second switch Q2 have opposite on or off states for power transfer.

[0036] In some embodiments, the first switch Q1 and the second switch Q2 may be metal-oxide-semiconductor field-effect transistors (MOSFETs), insulated-gate bipolar transistors (IGBTs), or gallium nitride (GaN) high electron mobility transistors, etc.

[0037] like Figure 1 As shown, there are four second switching transistors Q2, and each second switching transistor Q2 is connected in series with a corresponding first switching transistor Q1. At any given time, when the unidirectional conduction direction of the body diode of each first switching transistor Q1 is the same as or opposite to the direction of power transmission, the unidirectional conduction direction of the body diode of each second switching transistor Q2 is either opposite to or the same as the direction of power transmission.

[0038] Therefore, the server power supply 10 described above in this application realizes the direct conversion of AC power to DC power by setting the body diodes of the series-connected pair of switching transistors to be unidirectional and opposite in conduction direction.

[0039] Please see Figure 2 , Figure 2 This is another schematic diagram of the server power supply in some embodiments of this application. For example... Figure 2 As shown, the server power supply 10 also includes a control unit 500. The control unit 500 is connected to a plurality of first switching transistors Q1 and a plurality of second switching transistors Q2. The control unit 500 is used to divide each cycle of AC power into a plurality of time periods, and control the duty cycle of each first switching transistor Q1 and each second switching transistor Q2 in the corresponding time period according to the AC voltage value corresponding to each time period.

[0040] Therefore, the server power supply 10 described in this application, by subdividing each cycle of AC power into multiple time periods and dynamically adjusting the duty cycle of each switching transistor according to the voltage value of each time period, combined with the direct AC-DC conversion architecture without independent rectifier devices, can accurately control the amount of power conversion at each moment, so that the input current waveform follows the input voltage waveform, effectively improving the power factor and reducing harmonic distortion. From the two dimensions of topology and control strategy, it can synergistically improve the overall conversion efficiency and power quality of the AI ​​server high-voltage DC power supply.

[0041] Specifically, the duty cycle can be proportional to or have a specific functional relationship with the AC voltage value during that period, so as to achieve the purpose of the input current waveform following the input voltage waveform and improving the power factor.

[0042] Furthermore, the duty cycle varies between 0 and 1. When the AC voltage is low, the duty cycle is small; when the AC voltage is high, the duty cycle is large. By dynamically adjusting the duty cycle, precise control of the amount of electrical energy converted at different times can be achieved.

[0043] In some embodiments, the control unit 500 can divide each cycle of AC power into 50, 100, 200, etc. The more divisions, the higher the control accuracy, but the computational load increases accordingly. In practical applications, the number of divisions can be determined comprehensively based on the computing power of the control unit 500 and the control accuracy requirements.

[0044] Specifically, in the AI ​​server power supply 10, different computing processes may require different supply voltages. By adjusting the conduction level of the switching transistor, different voltage requirements can be flexibly adapted without changing the circuit topology, thus improving the versatility of the power supply.

[0045] Furthermore, the control unit 500 is used to control the duty cycle of each second switch Q2 to be the same as the duty cycle of the corresponding first switch Q1.

[0046] Therefore, the server power supply 10 described above in this application ensures that the auxiliary switch network 400 and the bridge circuit 300 maintain coordinated operation during power transmission by keeping the duty cycles of the paired switching transistors synchronized. The control logic is simple and reliable, ensuring that the body diode pair structure remains effective during segmented duty cycle control.

[0047] In some embodiments, the control unit 500 may output the same PWM signal to the paired first switch Q1 and second switch Q2, or output synchronous PWM signals to ensure that the turn-on and turn-off times of the two are consistent.

[0048] The AC voltage value is either the average voltage value within each time period, or the average voltage value between the start and end points of each time period.

[0049] Therefore, the server power supply 10 described above in this application can flexibly select the appropriate method for obtaining the reference voltage by providing two methods: the average voltage value over a period of time and the average voltage value at the endpoints. This ensures the accuracy of segmented duty cycle control while also taking into account real-time calculation efficiency, thereby enhancing the adaptability of the control strategy under different operating conditions of AI computation.

[0050] Specifically, the average voltage value over a time period can be obtained by sampling the AC voltage within that time period and calculating the average value. The average voltage value at each endpoint can be obtained by sampling the voltage values ​​at the beginning and end points of that time period and calculating the average value.

[0051] In some embodiments, the control unit 500 may be a general-purpose processor such as a central processing unit (CPU), or a digital signal processor (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA), or other programmable logic devices, discrete gate logic devices, transistor logic devices, or other logic control devices. It may also be a microprocessor such as a micro control unit (MCU).

[0052] like Figure 1 , Figure 2 As shown, the server power supply 10 also includes a transformer 600, which includes a first winding and a second winding coupled together. The first winding is connected to the bridge circuit 300, and the second winding is connected to the output terminal 200.

[0053] Therefore, the server power supply 10 described above in this application achieves electrical isolation and voltage level conversion between the input terminal 100 and the output terminal 200 through the transformer 600, which can flexibly adapt to different DC output voltage requirements, while providing electrical isolation protection and enhancing the safety and anti-interference capability of the AI ​​server.

[0054] In some embodiments, the server power supply 10 may further include a rectifier and filter circuit connected between the second winding of the transformer 600 and the output terminal 200 to further regulate the voltage of the DC power and / or smooth the voltage of the DC power output through the output terminal 200.

[0055] In some embodiments, the voltage value of the DC power can be greater than a first preset voltage value, which can be 48V, 54V, etc.

[0056] Furthermore, the voltage value of DC power can be equal to 800V.

[0057] The server power supply 10 of this application, through the aforementioned structure, eliminates the independent rectifier devices found in traditional architectures. It directly converts AC to DC using an auxiliary switching network 400 with paired transistors and a bridge circuit 300. This reduces the number of power devices and conduction losses at the topology level, thereby improving the power density and conversion efficiency. Furthermore, by segmenting the AC cycle and dynamically adjusting the duty cycle of the switching transistors based on the voltage values ​​at each time period, the input current waveform accurately follows the input voltage waveform, further improving the power factor and reducing harmonic interference. These innovative topology and control strategies work synergistically from two dimensions to comprehensively improve the conversion efficiency, power quality, and reliability of AI servers under 800V high-voltage DC systems, better meeting the stringent power requirements of AI computing processes.

[0058] Please see Figure 3 , Figure 3 This is a schematic diagram of a server device in some embodiments of this application. For example... Figure 3 As shown, this application also provides a server device 1, which includes a load 20 and a server power supply 10 as described in any of the foregoing embodiments. The server power supply 10 is used to provide DC power to the load 20.

[0059] Please refer to it again. Figure 1 .like Figure 1As shown, the server power supply 10 includes an input terminal 100, an output terminal 200, a bridge circuit 300, and an auxiliary switching network 400. The input terminal 100 receives AC power. The output terminal 200 outputs DC power. The bridge circuit 300 is connected between the input terminal 100 and the output terminal 200, and includes multiple first switching transistors Q1. The auxiliary switching network 400 is connected to the bridge circuit 300 and includes multiple second switching transistors Q2. Each second switching transistor Q2 is connected to a corresponding first switching transistor Q1, and the body diode of each second switching transistor Q2 is paired with the body diode of its corresponding first switching transistor Q1. The auxiliary switching network 400 works in conjunction with the bridge circuit 300 to convert AC power into DC power and output the DC power through the output terminal 200.

[0060] For a more specific description of the structure of the server power supply 10, please refer to the relevant content of the server power supply 10 in any of the foregoing embodiments, which will not be repeated here.

[0061] In some embodiments, the server device 1 further includes components such as a rack, motherboard, processor, and storage unit, and the load 20 can be an AI acceleration chip (such as a GPU, NPU, TPU) or other AI computing chip. The server power supply 10 is installed in the rack and is used to convert the input AC power into high-voltage DC power to power the load 20 and the motherboard.

[0062] In some embodiments, server device 1 may include a plurality of server power supplies 10.

[0063] The server power supply 10 and server device 1 of this application, through the aforementioned structure, eliminate the independent rectifier devices in traditional architectures. Instead, they directly convert AC to DC using an auxiliary switching network 400 with a bridge circuit 300, reducing the number of power devices and conduction losses at the topology level, thus improving the power density and conversion efficiency. Furthermore, by segmenting the AC cycle and dynamically adjusting the duty cycle of the switching transistors based on the voltage values ​​at each time period, the input current waveform accurately follows the input voltage waveform, further improving the power factor and reducing harmonic interference. These innovative topology and control strategies work synergistically from two dimensions to comprehensively improve the conversion efficiency, power quality, and reliability of the AI ​​server under an 800V high-voltage DC system, better meeting the stringent power requirements of AI computing.

[0064] Please see Figure 4 , Figure 4 This is a schematic diagram of a computing power system in some embodiments of this application. For example... Figure 4As shown, this application also provides a computing system 3, which includes a power supply device 2 and a server power supply 10 as described in any of the foregoing embodiments. The power supply device 2 is used to output AC power, and the server device 1 is used to perform calculations based on the AC power.

[0065] Please refer to it again. Figure 3 .like Figure 3 As shown, the server device 1 includes a load 20 and a server power supply 10. The server power supply 10 is used to provide DC power to the load 20.

[0066] For a more specific description of the structure of server device 1, please refer to the relevant content of server device 1 in any of the foregoing embodiments, which will not be repeated here.

[0067] The power supply device 2 includes, for example, a mains power grid or an uninterruptible power supply. The AC power output from the power supply device 2 is converted into high-voltage DC power by the server power supply 10 of the server device 1, which then drives the AI ​​computing chip and other loads 20 to perform calculations.

[0068] In some embodiments, the computing system 3 may also include network devices and a heat dissipation system, etc.

[0069] In some embodiments, the computing system 3 may include a plurality of server devices 1.

[0070] The server power supply 10, server device 1, and computing system 3 of this application, through the aforementioned structure, eliminate the independent rectifier devices found in traditional architectures. Instead, they directly convert AC to DC using an auxiliary switching network 400 with a bridge circuit 300, reducing the number of power devices and conduction losses at the topology level, thus improving the power density and conversion efficiency of the power supply. Furthermore, by segmenting the AC cycle and dynamically adjusting the duty cycle of the switching transistors based on the voltage values ​​at each time period, the input current waveform accurately follows the input voltage waveform, further improving the power factor and reducing harmonic interference. These innovative topology and control strategies work synergistically from two dimensions to comprehensively improve the conversion efficiency, power quality, and reliability of the AI ​​server under an 800V high-voltage DC system, better meeting the stringent power requirements of AI computing processes.

[0071] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Where there is no conflict, the embodiments and features in the embodiments of this application can be combined with each other. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A server power supply, comprising: include: The input terminal is used to receive AC power. The output terminal is used to output DC power. A bridge circuit is connected between the input terminal and the output terminal, and the bridge circuit includes a plurality of first switching transistors; An auxiliary switching network is connected to the bridge circuit. The auxiliary switching network includes a plurality of second switching transistors, each of which is connected to a corresponding first switching transistor. The body diode of each second switching transistor is paired with the body diode of the corresponding first switching transistor. The auxiliary switch network is used in conjunction with the bridge circuit to convert the AC power into DC power and output the DC power through the output terminal.

2. The server power supply of claim 1, wherein, The bridge circuit is a full-bridge circuit or a half-bridge circuit, and the number of the first switching transistors is either four or two. The number of the second switching transistors is equal to the number of the first switching transistors.

3. The server power supply of claim 1, wherein, The input terminal includes a first positive terminal and a first negative terminal, and the output terminal includes a second positive terminal and a second negative terminal. The number of first switching transistors is four, wherein two first switching transistors are connected in series between the first positive terminal and the first negative terminal, and the connection point between the two first switching transistors is connected to the second positive terminal. The other two first switching transistors are connected in series between the first positive terminal and the first negative terminal, and the connection point between the other two first switching transistors is connected to the second negative terminal. The two first switching transistors are connected in parallel with the other two first switching transistors.

4. The server power supply of claim 1, wherein, The number of the second switching transistors is four, and each second switching transistor is connected in series with a corresponding first switching transistor; Wherein, at any given time, when the unidirectional conduction direction of the body diode of each first switch is the same as or opposite to the direction of power transmission, the unidirectional conduction direction of the body diode of each second switch is opposite to or the same as the direction of power transmission.

5. The server power supply according to claim 1, characterized in that, The server power supply also includes a control unit, which is connected to the plurality of first switching transistors and the plurality of second switching transistors. The control unit is used to divide each cycle of the AC power into multiple time periods, and control the duty cycle of each first switching transistor and each second switching transistor in the corresponding time period according to the AC voltage value corresponding to each time period.

6. The server power supply according to claim 5, characterized in that, The control unit is used to control the duty cycle of each second switch to be the same as the duty cycle of the corresponding first switch.

7. The server power supply of claim 5, wherein, The AC voltage value is the average voltage value within each time period, or the average voltage value between the voltage value at the start point and the voltage value at the end point of each time period.

8. The server power supply of claim 1, wherein, The server power supply also includes a transformer, which includes a first winding and a second winding coupled together. The first winding is connected to the bridge circuit, and the second winding is connected to the output terminal.

9. A server apparatus characterized by comprising: include: load; The server power supply as described in any one of claims 1 to 8 is used to provide DC power to the load.

10. A computing power system, characterized by, include: Power supply device, used to output AC power; The server device as described in claim 9 is used to perform calculations based on the AC power.

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