A server power supply and a server

Abstract

The present application discloses a server power supply and a server, relating to the field of servers. The server power supply includes a gold finger and multiple sub-modules. Each sub-module includes: a first controller for outputting a first driving signal according to a first target DC voltage; a first conversion module for converting an AC voltage output by an AC power supply into the first target DC voltage in response to the first driving signal; a second controller for obtaining the load status of the server, determining whether the sub-module where it is located meets the working conditions based on the load status, and if so, outputting a second driving signal according to a second target DC voltage; a second conversion module for converting the first target DC voltage into the second target DC voltage in response to the second driving signal. The present application can achieve efficient output of the server power supply, reduce the number of server power supplies that need to be paralleled, and solve the contradiction between the volume of the server and the power design of the server power supply.

Description

Technical Field

[0001] The present application relates to the field of servers, and particularly to a server power supply and a server. Background Art

[0002] With the rapid development of Internet technology, information resources have shown an explosive growth, and the data tasks that the data center needs to process are becoming heavier and heavier. To meet the increasingly heavy data processing tasks, the performance of the server is constantly optimized. Along with this, the power consumption is also constantly increasing, which poses a severe challenge to the design of the server's PSU (Power Supply Unit).

[0003] To meet the large power demand of the server, the existing server power supply scheme is to use multiple server power supplies in parallel for power supply. On the one hand, the parallel power supply of multiple server power supplies occupies too much volume of the server. On the other hand, each power supply is independent of each other, and the system load is evenly distributed. When the load is light, the output power of each power supply is very low, resulting in a reduction in the efficiency of the power supply, a reduction in the service life of the power supply, and it is not conducive to the energy-saving design of the server.

[0004] Therefore, how to provide a solution to the above technical problems is an issue that those skilled in the art need to solve currently. Summary of the Invention

[0005] The purpose of the present application is to provide a server power supply and a server, which can achieve the high-efficiency output of the server power supply, reduce the number of server power supplies that need to be connected in parallel, and solve the contradiction between the server volume and the server power supply power design.

[0006] To solve the above technical problems, the present application provides a server power supply, including a gold finger and multiple sub-modules. The input end of each sub-module is connected to an AC power supply, the output end of each sub-module is connected to the first end of the gold finger, the second end of the gold finger is connected to the power supply end of the server, and each sub-module includes:

[0007] A first controller, configured to output a first driving signal according to a first target DC voltage;

[0008] A first conversion module, configured to convert the AC voltage output by the AC power supply into the first target DC voltage in response to the first driving signal;

[0009] A second controller, configured to obtain the load status of the server, determine whether the sub-module where it is located meets the working conditions based on the load status, and if so, output a second driving signal according to a second target DC voltage;

[0010] A second conversion module, configured to convert the first target DC voltage into the second target DC voltage in response to the second driving signal.

[0011] Optionally, the first controller is further configured to obtain a current signal and a voltage signal of the AC power supply, and generate a correction signal based on the voltage signal and the current signal;

[0012] The first conversion module is further configured to perform power factor correction on the AC voltage output by the AC power supply in response to the correction signal.

[0013] Optionally, the first conversion module includes a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a first capacitor, a second capacitor, a first switching tube, and a first inductor, where:

[0014] A common terminal after the anode of the first diode is connected to the cathode of the second diode is connected to the first output terminal of the AC power supply, a common terminal after the anode of the third diode is connected to the cathode of the fourth diode is connected to the second output terminal of the AC power supply, the cathode of the first diode is respectively connected to the cathode of the third diode, the first end of the first capacitor, and the first end of the first inductor, the second end of the first inductor is respectively connected to the first end of the first switching tube and the anode of the fifth diode, the driving end of the first switching tube is connected to the first controller, the cathode of the fifth diode is connected to the first end of the second capacitor, the anode of the second diode is respectively connected to the anode of the fourth diode, the second end of the first capacitor, and the second end of the second capacitor and then grounded, and the second end of the first switching tube is grounded.

[0015] Optionally, the second controller is further configured to obtain the actual output voltage of the sub-module where it is located;

[0016] The process of outputting the second driving signal according to the second target DC voltage includes:

[0017] Outputting the second driving signal according to the actual output voltage and the second target DC voltage.

[0018] Optionally, the process of obtaining the load status of the server includes:

[0019] Obtaining the output power of the sub-module where it is located to the server, and sending the output power to the second controllers of other sub-modules;

[0020] Determining the load status of the server based on the total output power of each sub-module to the server.

[0021] Optionally, the process of obtaining the output power of the sub-module where it is located for the server includes:

[0022] Obtain the actual output current of the sub-module where it is located;

[0023] Calculate the output power of the sub-module where it is located for the server based on the actual output current.

[0024] Optionally, the process of determining whether the sub-module where it is located meets the working conditions based on the load status includes:

[0025] Determine the preset range in which the total output power is located, and each preset range corresponds to one or more target sub-modules;

[0026] Judge whether the sub-module where it is located is the target sub-module corresponding to the preset range in which the total output power is located;

[0027] If so, determine that the sub-module where it is located meets the working conditions.

[0028] Optionally, the second controller in the sub-module that meets the working conditions is further configured to judge whether each sub-module that meets the working conditions is in a current balance state. If not, generate a third drive signal based on the actual output current and the target current of the sub-module where it is located;

[0029] The second conversion module is configured to adjust the output current of the sub-module where it is located to the target current in response to the third drive signal.

[0030] Optionally, the second controller is further configured to obtain the actual output current of the sub-module where it is located and send the actual output current to the second controllers of other sub-modules;

[0031] The process of judging whether each sub-module that meets the working conditions is in a current balance state includes:

[0032] Judge whether there is a deviation between the output currents of any two sub-modules that meet the working conditions greater than a preset value;

[0033] If so, determine that each sub-module that meets the working conditions is not in a current balance state;

[0034] If not, determine that each sub-module that meets the working conditions is in the current balance state.

[0035] Optionally, the process of generating the third drive signal based on the actual output current and the target current of the sub-module where it is located includes:

[0036] Obtain the average value of the actual output currents of the sub-modules that meet the working conditions, and use the average value as the target current;

[0037] Generate a third driving signal based on the actual output current of the sub-module where it is located and the target current.

[0038] Optionally, the second controller is further configured to determine whether there is an abnormal sub-module among the multiple sub-modules. If so, send an alarm signal to the server;

[0039] The abnormal sub-module is the sub-module where the second controller that does not send the operating parameters of the sub-module where it is located within a preset time period is located.

[0040] Optionally, the second controller is further configured to output a fourth driving signal when it determines that the sub-module where it is located does not meet the working conditions;

[0041] The second conversion module is configured to respond to the fourth driving signal and stop outputting the DC voltage.

[0042] Optionally, the second controller is further configured to output a trigger signal when it determines that the sub-module where it is located does not meet the working conditions;

[0043] The first controller is configured to control the first conversion circuit to stop outputting the DC voltage when receiving the trigger signal.

[0044] Optionally, the second conversion module includes a second switching tube, a third switching tube, a third capacitor, a fourth capacitor, a second inductor, a third inductor, a transformer, a sixth diode, and a seventh diode, where:

[0045] The first end of the second switching tube is connected to the first output end of the first conversion module. The second end of the second switching tube is respectively connected to the first end of the third capacitor and the first end of the second switching tube. The second end of the third capacitor is connected to the first end of the second inductor. The second end of the second inductor is respectively connected to the first end of the third inductor and the first end of the primary winding of the transformer. The first end of the first secondary winding of the transformer is connected to the anode of the sixth diode. The cathode of the sixth diode is respectively connected to the cathode of the seventh diode and the first end of the fourth capacitor. The second end of the first secondary winding is respectively connected to the first end of the second secondary winding of the transformer and the second end of the fourth capacitor. The second end of the second secondary winding is connected to the anode of the seventh diode. The second end of the third inductor is respectively connected to the second end of the primary winding, the second end of the third switching tube and the second output end of the first conversion module. The second end of the fourth capacitor and the second end of the third switching tube are both grounded. The control ends of the second switching tube and the third switching tube are both connected to the second controller.

[0046] To solve the above technical problems, the present application also provides a server, including a server body and the server power supply as described in any one of the above. The server body is provided with a power supply terminal, and the server power supply is connected to the power supply terminal.

[0047] The present application provides a server power supply, including a gold finger and multiple sub-modules. The input end of each sub-module is connected to an AC power supply, the output end of each sub-module is connected to the first end of the gold finger, and the second end of the gold finger is connected to the power supply terminal of the server. Each sub-module includes: a first controller for outputting a first driving signal according to a first target DC voltage; a first conversion module for converting the AC voltage output by the AC power supply into the first target DC voltage in response to the first driving signal; a second controller for obtaining the load state of the server and determining whether the sub-module where it is located meets the working conditions based on the load state. If so, outputting a second driving signal according to a second target DC voltage; a second conversion module for converting the first target DC voltage into the second target DC voltage in response to the second driving signal.

[0048] In practical applications, adopting the solution of the present application, multiple sub-modules for voltage conversion are provided in a server power supply, and regulation is performed inside the server power supply based on the load state of the server, and the corresponding number of sub-modules are selected to work, so as to achieve the efficient output of the server power supply. While not reducing the service life of the power supply, it is also beneficial to the energy-saving design of the server. Since multiple sub-modules are provided in a server power supply, the output power of a single server power supply is increased, and the number of server power supplies that need to be connected in parallel is reduced, thus solving the contradiction between the volume of the server and the power design of the server power supply.

[0049] The present application also provides a server, which has the same beneficial effects as the above-mentioned server power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0051] Figure 1 is a schematic structural diagram of a server power supply provided by the present application;

[0052] Figure 2 is a schematic structural diagram of a first conversion module provided by the present application;

[0053] Figure 3 is a schematic structural diagram of a second conversion module provided by the present application;

[0054] Figure 4 is a schematic structural diagram of another server power supply provided by the present application;

[0055] Figure 5 is a control flow chart of a server power supply provided by the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0056] The core of the present application is to provide a server power supply and a server, which can achieve efficient output of the server power supply, reduce the number of server power supplies that need to be connected in parallel, and solve the contradiction between the volume of the server and the power design of the server power supply.

[0057] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts fall within the scope of protection of the present application.

[0058] Please refer to Figure 1 , Figure 1 is a schematic structural diagram of a server power supply provided by the present application. The server power supply includes a gold finger 2 and a plurality of sub-modules 1. The input end of each sub-module 1 is connected to an AC power supply, the output end of each sub-module 1 is connected to the first end of the gold finger 2, the second end of the gold finger 2 is connected to the power supply end of the server, and each sub-module 1 includes:

[0059] The first controller 11 is configured to output a first drive signal according to a first target DC voltage;

[0060] The first conversion module 12 is configured to respond to the first drive signal and convert the AC voltage output by the AC power supply into the first target DC voltage;

[0061] The second controller 13 is configured to obtain the load status of the server, determine whether the sub-module 1 where it is located meets the working conditions based on the load status, and if so, output a second drive signal according to a second target DC voltage;

[0062] The second conversion module 14 is configured to respond to the second drive signal and convert the first target DC voltage into the second target DC voltage.

[0063] Specifically, the server power supply in this application includes multiple sub-modules 1. The sub-module 1 can use the existing C13 power cord as an input terminal to connect to the AC power supply. Here, the AC power supply can specifically be the mains AC power supply. The output terminals of each sub-module 1 are all connected to the gold finger 2, and the gold finger 2 is used to connect to the power supply terminal of the server, so that the server power supply can supply power to the server. It can be understood that the multiple sub-modules 1 in the server power supply are connected in parallel for output, which not only improves the output power of the server power supply, but also each sub-module 1 can still use the existing power cord.

[0064] Specifically, each sub-module 1 includes a first controller 11, a first conversion module 12, a second controller 13, and a second conversion module 14. The input terminal of the first conversion module 12 is the input terminal of the sub-module 1, and the output terminal of the second conversion module 14 is the output terminal of the sub-module 1. Among them, the first conversion module 12 is controlled by the first controller 11 to achieve AC-DC AC-DC voltage conversion, and the second conversion module 14 is controlled by the second controller 13 to achieve DC-DC DC voltage conversion. The number of sub-modules 1 in the server power supply can be set according to actual needs, and this application does not make specific limitations here.

[0065] As an optional embodiment, the first conversion module 12 can be selected as a PFC (Power Factor Correction) circuit, and its circuit structure refers to Figure 2As shown in the figure, it specifically includes a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a fifth diode D5, a first capacitor C1, a second capacitor C2, a first switching transistor Q1, and a first inductor L1, where: the common terminal after connecting the anode of the first diode D1 to the cathode of the second diode D2 is connected to the first output terminal of the AC power supply; the common terminal after connecting the anode of the third diode D3 to the cathode of the fourth diode D4 is connected to the second output terminal of the AC power supply; the cathode of the first diode D1 is respectively connected to the cathode of the third diode D3, the first end of the first capacitor C1, and the first end of the first inductor L1; the second end of the first inductor L1 is respectively connected to the first end of the first switching transistor Q1 and the anode of the fifth diode D5; the driving terminal of the first switching transistor Q1 is connected to the first controller 11; the cathode of the fifth diode D5 is connected to the first end of the second capacitor C2; the anode of the second diode D2 is respectively connected to the anode of the fourth diode D4, the second end of the first capacitor C1, and the second end of the second capacitor C2 and then grounded; the second end of the first switching transistor Q1 is grounded. Of course, in addition to the above circuit structure, other AC-DC conversion circuit structures or AC-DC conversion chips can also be selected to implement the above AC-DC voltage conversion function.

[0066] Specifically, the first controller 11 can output a first driving signal according to the first target DC voltage, and the first driving signal is used to control the on-time and off-time of the first switching transistor Q1 in the first conversion circuit, so that the first conversion module 12 can convert the AC voltage output by the AC power supply into the first target DC voltage. It can be understood that when the first target DC voltage needs to be adjusted, the duty cycle of the first driving signal output by the first controller 11 is adjusted accordingly, and the output voltage of the first conversion circuit can be adjusted. For example, the first conversion circuit can convert the 220V AC power output by the mains AC power supply into 400V DC power.

[0067] As an optional embodiment, the first controller 11 is further configured to obtain the current signal and voltage signal of the AC power supply, and generate a correction signal based on the voltage signal and current signal;

[0068] The first conversion module 12 is further configured to respond to the correction signal and perform power factor correction on the AC voltage output by the AC power supply.

[0069] Specifically, the first controller 11 and the first conversion module 12 can also perform power factor correction on the input AC voltage at the same time to improve the power factor of the system.

[0070] As an optional embodiment, the second conversion module 14 can select an LLC circuit, refer to Figure 3As shown in the figure, it specifically includes a second switching transistor Q2, a third switching transistor Q3, a third capacitor C3, a fourth capacitor, a second inductor L2, a third inductor L3, a transformer T, a sixth diode D6, and a seventh diode D7, where: the first end of the second switching transistor Q2 is connected to the first output end of the first conversion module 12, the second end of the second switching transistor Q2 is respectively connected to the first end of the third capacitor C3 and the first end of the second switching transistor Q2, the second end of the third capacitor C3 is connected to the first end of the second inductor L2, the second end of the second inductor L2 is respectively connected to the first end of the third inductor L3 and the first end of the primary winding of the transformer T, the first end of the first secondary winding of the transformer T is connected to the anode of the sixth diode D6, the cathode of the sixth diode D6 is respectively connected to the cathode of the seventh diode D7 and the first end of the fourth capacitor, the second end of the first secondary winding is respectively connected to the first end of the second secondary winding of the transformer T and the second end of the fourth capacitor, the second end of the second secondary winding is connected to the anode of the seventh diode D7, the second end of the third inductor L3 is respectively connected to the second end of the primary winding, the second end of the third switching transistor Q3, and the second output end of the first conversion module 12, the second ends of the fourth capacitor and the third switching transistor Q3 are both grounded, and the control ends of the second switching transistor Q2 and the third switching transistor Q3 are both connected to the second controller 13. Of course, in addition to the above circuit structure, other DC-DC conversion circuit structures or DC-DC conversion chips can also be selected to implement the above DC voltage conversion function.

[0071] As an alternative embodiment, the second controller 13 is further configured to obtain the actual output voltage of the sub-module 1 where it is located;

[0072] The process of outputting the second driving signal according to the second target DC voltage includes:

[0073] Outputting the second driving signal according to the actual output voltage and the second target DC voltage.

[0074] Specifically, the second controller 13 can output the second driving signal according to the second target DC voltage and the actual output voltage of the sub-module 1 where it is located. The second driving signal is used to control the on-time and off-time of the second switching transistor Q2 and the third switching transistor Q3 in the second conversion module 14, so that the second conversion module 14 can convert the DC voltage output by the first conversion module 12 into the second target DC voltage. It can be understood that when the second target DC voltage needs to be adjusted, the duty cycle of the second driving signal output by the second controller 13 is adjusted accordingly, and the output voltage of the second conversion module 14 can be adjusted. For example, the second conversion module 14 can convert the 400V DC power output by the first conversion module 12 into 12V DC power required by the server.

[0075] Further, considering that the server power supply includes multiple sub-modules 1, in order to improve the efficiency of the server power supply, the number of working sub-modules 1 can be adjusted according to the current load status of the server. For example, when the server is in a light load state, the server can be powered by one sub-module 1, and when the server is in a heavy load state, the server can be powered by multiple sub-modules 1.

[0076] Specifically, the second controller 13 of each sub-module 1 is used to obtain the load status of the server, determine whether the sub-module 1 where it is located meets the working conditions based on the load status. If so, the second drive signal is output according to the second target DC voltage. If not, the corresponding second conversion module 14 is controlled not to work.

[0077] It can be seen that in this embodiment, multiple sub-modules 1 for realizing voltage conversion are provided in a server power supply, and regulation is performed inside the server power supply based on the load status of the server, and the corresponding number of sub-modules 1 is selected to work, so as to achieve the efficient output of the server power supply. While not reducing the service life of the power supply, it is also beneficial to the energy-saving design of the server. Since multiple sub-modules 1 are provided in a server power supply, the output power of a single server power supply is increased, and the number of server power supplies that need to be connected in parallel is reduced, thus solving the contradiction between the volume of the server and the power design of the server power supply.

[0078] Based on the above embodiments:

[0079] As an optional embodiment, the process of obtaining the load status of the server includes:

[0080] Obtain the output power of the sub-module 1 where it is located to the server, and send the output power to the second controller 13 of other sub-modules 1;

[0081] Based on the total output power of each sub-module 1 to the server, determine the load status of the server.

[0082] As an optional embodiment, the process of obtaining the output power of the sub-module 1 where it is located to the server includes:

[0083] Obtain the actual output current of the sub-module 1 where it is located;

[0084] Calculate the output power of the sub-module 1 where it is located to the server based on the actual output current.

[0085] Specifically, each submodule 1 also includes a communication module, and each submodule 1 communicates with each other through the communication module. After obtaining the output power of the submodule 1 where it is located, the second controller 13 of each submodule 1 can send its own output power to the second controllers 13 of other submodules 1. Each second controller 13 calculates the total output power of the server power supply based on the output power of each submodule 1 obtained, thereby determining the load state of the server.

[0086] Reference Figure 4 As shown, a server power supply includes two sub-modules 1 as an example. The server power supply includes sub-module 1a and sub-module 1b. Sub-module 1a includes a first controller a1, PFC a, a second controller a2, and LLC a. Sub-module 1b includes a first controller b1, PFC b, a second controller b2, and LLC b.

[0087] The second controller a2 obtains the output current I of the submodule 1a. 1 , based on the output current I a Calculate the output power P of submodule 1a a , and the output power P a The second controller b2 of the submodule 1b is sent to the second controller b2 of the submodule 1b. Accordingly, the second controller b2 of the submodule 1b obtains the output current I of the submodule 1b. b , based on the output current I b Calculate the output power P of submodule 1b b , and the output power P b The second controller a2 of the submodule 1a calculates the output power P a and the received output power P b Calculate the total output power P = P a +P b The second controller b2 calculates the output power P b And the received output power P a Calculate the total output power P = P a +P b .

[0088] As an optional embodiment, the process of judging whether the submodule 1 where the submodule 1 is located meets the working conditions based on the load state includes:

[0089] Determine a preset range of the total output power, each preset range corresponds to one or more target submodules 1;

[0090] Determine whether the submodule 1 in which the submodule 1 is located is the target submodule 1 corresponding to the preset range of the total output power;

[0091] If so, it is determined that the sub-module 1 where it is located meets the working conditions.

[0092] It can be understood that multiple output power ranges can be preset in advance. Each preset range corresponds to a load state of the server, and the number of sub-modules 1 required for different load states is also different. Therefore, each preset range can correspond to one or more target sub-modules 1. Therefore, after obtaining the total output power, first determine the preset range where the total output power is located, and then determine whether itself is the target sub-module 1 corresponding to this preset range. If so, it is determined that the sub-module 1 where it is located meets the working conditions and outputs a second drive signal. If not, it is determined that the sub-module 1 where it is located does not meet the working conditions, and then control the sub-module 1 where it is located not to output.

[0093] Still taking Figure 4 the two sub-modules 1 shown as an example for illustration. Assume that the rated output power of each sub-module 1 is 1800W. It is set that when the total output power is higher than 70% of the rated output power of a single sub-module 1, the two sub-modules 1 output power to the server. Otherwise, a single sub-module 1 outputs power to the server alone. On this basis, two power ranges can be set, namely the first preset range (0, 1260] and the second preset range (1260, +∞). The target sub-module 1 corresponding to the first preset range includes sub-module 1a, and the target sub-module 1 corresponding to the second preset range includes sub-module 1a and sub-module 1b. If the total output power P is in the second preset range (1260, +∞), then both sub-module 1a and sub-module 1b determine that the sub-module 1 where they are located is the target sub-module 1 corresponding to the preset range where the current total output power is located. If the total output power P is in the first preset range (0, 1260], then sub-module 1a determines that the sub-module 1 where it is located is the target sub-module 1 corresponding to the preset range where the current total output power is located, and sub-module 1b determines that the sub-module 1 where it is located is not the target sub-module 1 corresponding to the preset range where the current total output power is located, that is, it is determined that the sub-module 1 where it is located does not meet the working conditions.

[0094] As an optional embodiment, the second controller 13 is further configured to output a fourth drive signal when it is determined that the sub-module 1 where it is located does not meet the working conditions;

[0095] The second conversion module 14 is configured to stop outputting DC voltage in response to the fourth drive signal.

[0096] As an optional embodiment, the second controller 13 is further configured to output a trigger signal when it is determined that the sub-module 1 where it is located does not meet the working conditions;

[0097] The first controller 11 is configured to control the first conversion circuit to stop outputting DC voltage when receiving the trigger signal.

[0098] Specifically, the second controller 13 is further configured to generate a fourth driving signal when determining that the sub-module 1 where it is located does not meet the working conditions, so as to control the second conversion module 14 to stop outputting DC voltage. The second controller 13 in each sub-module 1 can also be connected to the first controller 11 through I2C. When the second controller 13 determines that the sub-module 1 where it is located does not meet the working conditions, it can also send a trigger signal to the first controller 11, so that after receiving the trigger signal, the first controller 11 controls the first conversion circuit to stop working.

[0099] As an optional embodiment, the second controller 13 in the sub-module 1 that meets the working conditions is further configured to determine whether the sub-modules 1 that meet the working conditions are in a current balance state. If not, a third driving signal is generated based on the actual output current and the target current of the sub-module 1 where it is located;

[0100] The second conversion module 14 is configured to adjust the output current of the sub-module 1 where it is located to the target current in response to the third driving signal.

[0101] As an optional embodiment, the second controller 13 is further configured to obtain the actual output current of the sub-module 1 where it is located and send the actual output current to the second controllers 13 of other sub-modules 1;

[0102] The process of determining whether the sub-modules 1 that meet the working conditions are in a current balance state includes:

[0103] Determine whether the deviation of the output currents of any two sub-modules 1 that meet the working conditions is greater than a preset value;

[0104] If so, it is determined that the sub-modules 1 that meet the working conditions are not in a current balance state;

[0105] If not, it is determined that the sub-modules 1 that meet the working conditions are in a current balance state.

[0106] As an optional embodiment, the process of generating the third driving signal based on the actual output current and the target current of the sub-module 1 where it is located includes:

[0107] Obtain the average value of the actual output currents of the sub-modules 1 that meet the working conditions, and use the average value as the target current;

[0108] Generate a third driving signal based on the actual output current and the target current of the sub-module 1 where it is located.

[0109] Specifically, the second controller 13 is configured to obtain the output current of the sub-module 1 where it is located and send the output current of the sub-module 1 where it is located to the second controllers 13 of other sub-modules 1. Considering that multiple sub-modules 1 in the server power supply may simultaneously meet the working conditions and be in the working state, in this embodiment, further judgment is made on whether the output currents of the sub-modules 1 in the working state are balanced. Specifically, the second controllers 13 of the sub-modules 1 communicate with each other to transmit the output currents of the sub-modules 1 where they are located. The second controller 13 determines whether the output currents of the sub-modules 1 that meet the working conditions are balanced based on its own output current and the received output current. If not balanced, the second controller 13 in the sub-module 1 that meets the working conditions generates a third driving signal based on the output current of the sub-module 1 where it is located and the target current to adjust the on-time and off-time of the switching tubes in the second conversion module 14, so that the output current of the sub-module 1 where it is located approaches the target current. Among them, the target current can be obtained by averaging the output currents of the sub-modules 1 that meet the working conditions.

[0110] Still taking Figure 4 the two sub-modules 1 shown as an example for illustration. Assume that both sub-module 1a and sub-module 1b meet the working conditions and are in the working state. The second controller a2 in sub-module 1a obtains the output current I 1 of sub-module 1a and sends the output current I 1 to the second controller b2 in sub-module 1b. Similarly, the second controller b2 in sub-module 1b obtains the output current I 2 of sub-module 1b and sends the output current I 2 to the second controller a2 in sub-module 1a. The second controller a2 in sub-module 1a and the second controller b2 in sub-module 1b both judge whether the output currents I 2 and I 1 are balanced. Specifically, it can be judged whether |I 2 -I 1 | is greater than a preset threshold. If so, it means unbalanced; if not, it means balanced. When it is judged to be unbalanced, the second controller a2 in sub-module 1a takes the average value of I 2 and I 1 as the target current, jointly determines a third driving signal with the output current of sub-module 1a it obtains, and sends the third driving signal to LLC a to adjust the output current of sub-module 1a. The second controller b2 in sub-module 1b takes the average value of I 2 and I 1 as the target current, jointly determines a third driving signal with the output current of sub-module 1b it obtains, and sends the third driving signal to LLC b to adjust the output current of sub-module 1b.

[0111] As an alternative embodiment, the second controller 13 is further configured to determine whether there is an abnormal sub-module 1 among the multiple sub-modules 1. If so, an alarm signal is sent to the server.

[0112] The abnormal sub-module 1 is the sub-module 1 where the second controller 13 that has not sent the operating parameters of its own sub-module 1 within a preset time period is located.

[0113] Specifically, referring to the above, the second controllers 13 of each sub-module 1 in this application can communicate with each other to transmit the operating parameters of their respective sub-modules 1, such as output current and / or output power, etc. The second controller 13 in each sub-module 1 can determine whether the second controller 13 in any other sub-module 1 has normally sent the operating parameters within a preset time period. If there is any second controller 13 that has not sent the operating parameters within the preset time period, that is, it has not received the operating parameters sent by the second controller 13 within the preset time period itself, it can be determined that the sub-module 1 where the second controller 13 is located is faulty. At this time, the normally operating second controller 13 sends an alarm signal to the server to notify the server to reduce the frequency to ensure that the server does not crash. At the same time, if the faulty sub-module 1 is the sub-module 1 that currently meets the working conditions, switch to any normal sub-module 1 to replace the faulty sub-module 1 to work.

[0114] Still taking Figure 4 the two sub-modules 1 shown as an example for illustration, the specific process is referred to Figure 5 shown. The second controllers 13 in sub-module 1a and sub-module 1b both perform the output current acquisition operation, calculate their respective output powers based on the acquired output current, and determine whether there is a faulty sub-module 1 according to whether they have received the output powers sent by each other. If sub-module 1a is faulty, sub-module 1b outputs power to the server. If sub-module 1b is faulty, sub-module 1a outputs power to the server. If there is no faulty sub-module 1, it is determined whether the total output power of the two sub-modules 1 is greater than n% of the rated output power of a single sub-module 1. n is set according to actual engineering needs, such as it can be set to 70, 50, etc. If not, the output power of sub-module 1a is default. If so, the output power is jointly output by sub-module 1a and sub-module 1b.

[0115] In summary, the server power supply design adopts a parallel mode of multiple internal sub-modules 1. The multiple sub-modules 1 are independently controlled, independently input, and parallely output. When a fault occurs, the faulty sub-module 1 can be switched to ensure that the functions of the power supply system are not completely lost. This design can solve the bottleneck of the existing PSU power design and achieve a new breakthrough in the PSU design. Each sub-module 1 adopts a two-stage structure design. The front-stage PFC circuit realizes AC-DC conversion, and the rear-stage LLC circuit realizes DC-DC conversion. Each stage realizes digital control through the corresponding controller. Multiple sub-modules 1 inside the server power supply communicate with each other through the I2C bus. On the one hand, it realizes current sharing of the sub-modules 1, and on the other hand, it realizes intelligent power distribution, and reasonably plans the power output of the sub-modules according to the system load.

[0116] On the other hand, the present application also provides a server, including a server body and the server power supply described in any one of the above embodiments. The server body is provided with a power supply terminal, and the server power supply is connected to the power supply terminal.

[0117] Among them, the server power supply includes a gold finger and multiple sub-modules. The input end of each sub-module is connected to an AC power supply, the output end of each sub-module is connected to the first end of the gold finger, the second end of the gold finger is connected to the power supply terminal of the server, and each sub-module includes:

[0118] A first controller, configured to output a first driving signal according to a first target DC voltage;

[0119] A first conversion module, configured to respond to the first driving signal and convert the AC voltage output by the AC power supply into a first target DC voltage;

[0120] A second controller, configured to obtain the load status of the server, determine whether the sub-module where it is located meets the working conditions based on the load status, and if so, output a second driving signal according to a second target DC voltage;

[0121] A second conversion module, configured to respond to the second driving signal and convert the first target DC voltage into a second target DC voltage.

[0122] Specifically, the sub-module can use the existing C13 power cord as the input terminal to connect to the AC power supply, and the AC power supply here can specifically be the mains AC power supply. The output ends of each sub-module are all connected to the gold finger, and the gold finger is used to connect to the power supply terminal of the server so that the server power supply can supply power to the server. It can be understood that the multiple sub-modules in the server power supply are parallely output, which improves the output power of the server power supply while each sub-module can still use the existing power cord.

[0123] Specifically, each sub-module includes a first controller, a second controller, a first conversion module, and a second conversion module. The input end of the first conversion module is the input end of the sub-module, and the output end of the second conversion module is the output end of the sub-module. Among them, the first conversion module is controlled by the first controller to achieve AC-DC AC-DC voltage conversion, and the second conversion module is controlled by the second controller to achieve DC-DC DC voltage conversion. The number of sub-modules in the server power supply can be set according to actual needs, and the present application does not make specific limitations here.

[0124] As an alternative embodiment, the first conversion module may be a PFC conversion circuit, specifically including a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a first capacitor, a second capacitor, a first switching tube, and a first inductor, where: The common terminal after connecting the anode of the first diode and the cathode of the second diode is connected to the first output terminal of the AC power supply. The common terminal after connecting the anode of the third diode and the cathode of the fourth diode is connected to the second output terminal of the AC power supply. The cathode of the first diode is respectively connected to the cathode of the third diode, the first end of the first capacitor, and the first end of the first inductor. The second end of the first inductor is respectively connected to the first end of the first switching tube and the anode of the fifth diode. The driving end of the first switching tube is connected to the first controller. The cathode of the fifth diode is connected to the first end of the second capacitor. The anode of the second diode is respectively connected to the anode of the fourth diode, the second end of the first capacitor, and the second end of the second capacitor. The second end of the first switching tube is grounded. Of course, in addition to the above circuit structure, other AC-DC conversion circuit structures or AC-DC conversion chips can also be selected to implement the above AC-DC voltage conversion function.

[0125] Specifically, the first controller can output a first driving signal according to the first target DC voltage. The first driving signal is used to control the on-time and off-time of the first switching tube in the first conversion circuit, so that the first conversion module can convert the AC voltage output by the AC power supply into the first target DC voltage. It can be understood that when the first target DC voltage needs to be adjusted, the duty cycle of the first driving signal output by the first controller is adjusted accordingly, and the output voltage of the first conversion circuit can be adjusted. For example, the first conversion circuit can convert the 220V AC power output by the mains AC power supply into 400V DC power.

[0126] As an alternative embodiment, the first controller is further configured to obtain the current signal and voltage signal of the AC power supply, and generate a correction signal based on the voltage signal and current signal;

[0127] The first conversion module is further configured to respond to the correction signal and perform power factor correction on the AC voltage output by the AC power supply.

[0128] Specifically, the first controller and the first conversion module can also perform power factor correction on the input AC voltage simultaneously to improve the power factor of the system.

[0129] As an alternative embodiment, the second conversion module can be an LLC circuit, specifically including a second switching transistor, a third switching transistor, a third capacitor, a fourth capacitor, a second inductor, a third inductor, a transformer, a sixth diode, and a seventh diode, where: the first end of the second switching transistor is connected to the first output end of the first conversion module, the second end of the second switching transistor is respectively connected to the first end of the third capacitor and the first end of the second switching transistor, the second end of the third capacitor is connected to the first end of the second inductor, the second end of the second inductor is respectively connected to the first end of the third inductor and the first end of the primary winding of the transformer, the first end of the first secondary winding of the transformer is connected to the anode of the sixth diode, the cathode of the sixth diode is respectively connected to the cathode of the seventh diode and the first end of the fourth capacitor, the second end of the first secondary winding is respectively connected to the first end of the second secondary winding of the transformer and the second end of the fourth capacitor, the second end of the second secondary winding is connected to the anode of the seventh diode, the second end of the third inductor is respectively connected to the second end of the primary winding, the second end of the third switching transistor, and the second output end of the first conversion module, the second ends of the fourth capacitor and the third switching transistor are both grounded, and the control ends of the second switching transistor and the third switching transistor are both connected to the second controller. Of course, in addition to the above circuit structure, other DC-DC conversion circuit structures or DC-DC conversion chips can also be selected to implement the above DC voltage conversion function.

[0130] As an alternative embodiment, the second controller is further configured to obtain the actual output voltage of the sub-module where it is located;

[0131] The process of outputting the second driving signal according to the second target DC voltage includes:

[0132] Outputting the second driving signal according to the actual output voltage and the second target DC voltage.

[0133] Specifically, the second controller can output the second driving signal according to the second target DC voltage and the actual output voltage of the sub-module where it is located. The second driving signal is used to control the on-time and off-time of the second switching transistor and the third switching transistor in the second conversion module, so that the second conversion module can convert the DC voltage output by the first conversion module into the second target DC voltage. It can be understood that when the second target DC voltage needs to be adjusted, the duty cycle of the second driving signal output by the second controller is adjusted accordingly, and the output voltage of the second conversion module can be adjusted. For example, the second conversion module can convert the 400V DC power output by the first conversion module into 12V DC power required by the server.

[0134] Further, considering that the server power supply includes multiple sub-modules, in order to improve the efficiency of the server power supply, the number of working sub-modules can be adjusted according to the current load status of the server. For example, when the server is lightly loaded, the server can be powered by one sub-module, and when the server is heavily loaded, the server can be powered by multiple sub-modules.

[0135] Specifically, the second controller of each sub-module is used to obtain the load status of the server, determine whether the sub-module where it is located meets the working conditions based on the load status. If so, a second drive signal is output according to the second target DC voltage. If not, the corresponding second conversion module is controlled not to work.

[0136] As an alternative embodiment, the process of obtaining the load status of the server includes:

[0137] Obtain the output power of the sub-module where it is located to the server, and send the output power to the second controllers of other sub-modules;

[0138] Based on the total output power of each sub-module to the server, determine the load status of the server.

[0139] As an alternative embodiment, the process of obtaining the output power of the sub-module where it is located to the server includes:

[0140] Obtain the actual output current of the sub-module where it is located;

[0141] Calculate the output power of the sub-module where it is located to the server based on the actual output current.

[0142] Specifically, each sub-module further includes a communication module, and each sub-module realizes mutual communication through the communication module. After the second controller of each sub-module obtains the output power of the sub-module where it is located, it can send its own output power to the second controllers of other sub-modules. Each second controller calculates the total output power of the server power supply according to the obtained output power of each sub-module, so as to determine the load status of the server.

[0143] As an alternative embodiment, the process of determining whether the sub-module where it is located meets the working conditions based on the load status includes:

[0144] Determine the preset range where the total output power is located, and each preset range corresponds to one or more target sub-modules;

[0145] Judge whether the sub-module where it is located is the target sub-module corresponding to the preset range where the total output power is located;

[0146] If so, it is determined that the sub-module where it is located meets the working conditions.

[0147] It can be understood that multiple output power ranges can be preset in advance. Each preset range corresponds to a load state of a server, and the number of sub-modules required for different load states is also different. Therefore, each preset range can correspond to one or more target sub-modules. Therefore, after obtaining the total output power, first determine the preset range in which the total output power is located, and then determine whether itself is the target sub-module corresponding to this preset range. If so, it is determined that the sub-module where itself is located meets the working conditions and outputs a second drive signal. If not, it is determined that the sub-module where itself is located does not meet the working conditions, and then control the sub-module where itself is located not to output.

[0148] As an optional embodiment, the second controller is further configured to output a fourth drive signal when it is determined that the sub-module where itself is located does not meet the working conditions;

[0149] The second conversion module is configured to stop outputting DC voltage in response to the fourth drive signal.

[0150] As an optional embodiment, the second controller is further configured to output a trigger signal when it is determined that the sub-module where itself is located does not meet the working conditions;

[0151] The first controller is configured to control the first conversion circuit to stop outputting DC voltage when receiving the trigger signal.

[0152] Specifically, the second controller is further configured to generate a fourth drive signal when it is determined that the sub-module where itself is located does not meet the working conditions, so as to control the second conversion module to stop outputting DC current. The second controller in each sub-module can also be connected to the first controller through I2C. When the second controller determines that the sub-module where itself is located does not meet the working conditions, it can also send a trigger signal to the first controller, so that after the first controller receives the trigger signal, it controls the first conversion circuit to stop working.

[0153] As an optional embodiment, the second controller in the sub-module that meets the working conditions is further configured to determine whether each sub-module that meets the working conditions is in a current balance state. If not, generate a third drive signal based on the actual output current and the target current of the sub-module where itself is located;

[0154] The second conversion module is configured to adjust the output current of the sub-module where itself is located to the target current in response to the third drive signal.

[0155] As an optional embodiment, the second controller is further configured to obtain the actual output current of the sub-module where itself is located and send the actual output current to the second controllers of other sub-modules;

[0156] The process of determining whether each sub-module that meets the working conditions is in a current balance state includes:

[0157] Determine whether the deviation of the output currents of any two sub - modules that meet the working conditions is greater than a preset value;

[0158] If so, determine that each sub - module that meets the working conditions is not in a current - balanced state;

[0159] If not, determine that each sub - module that meets the working conditions is in a current - balanced state. As an optional embodiment, the process of generating the third drive signal based on the actual output current and the target current of the sub - module where it is located includes:

[0160] Obtain the average value of the actual output currents of each sub - module that meets the working conditions, and use the average value as the target current;

[0161] Generate a third drive signal based on the actual output current and the target current of the sub - module where it is located.

[0162] Specifically, the second controller is used to obtain the output current of the sub - module where it is located, and send the output current of the sub - module where it is located to the second controllers of other sub - modules. Considering that there may be multiple sub - modules in the server power supply that simultaneously meet the working conditions and are in a working state, this embodiment further determines whether the currents of each sub - module in the working state are balanced. Specifically, the second controllers of each sub - module communicate with each other to transmit the output currents of their respective sub - modules. The second controller determines whether the output currents of each sub - module that meets the working conditions are balanced based on its own output current and the received output current. If not, the second controller in the sub - module that meets the working conditions generates a third drive signal based on the output current of the sub - module where it is located and the target current to adjust the on - time and off - time of the switching tubes in the second conversion module, so that the output current of the sub - module where it is located approaches the target current. Among them, the target current can be obtained by averaging the output currents of each sub - module that meets the working conditions.

[0163] As an optional embodiment, the second controller is further used to determine whether there is an abnormal sub - module among multiple sub - modules. If so, send an alarm signal to the server;

[0164] The abnormal sub - module is the sub - module where the second controller that has not sent the operating parameters of the sub - module where it is located within a preset time period.

[0165] Specifically, referring to the above, the second controllers of the respective sub-modules in the present application can communicate with each other and transmit the operating parameters of the sub-module where each is located, such as output current and / or output power, etc. The second controller in each sub-module can determine whether the second controller in any other sub-module has normally sent the operating parameters within a preset time period. If there is any second controller that has not sent the operating parameters within the preset time period, that is, the second controller itself has not received the operating parameters sent by this second controller within the preset time period, it can be determined that the sub-module where this second controller is located has failed. At this time, the normally operating second controller sends an alarm signal to the server to notify the server to reduce the frequency to ensure that the server does not crash. At the same time, if the faulty sub-module is the sub-module that currently meets the working conditions, then switch to any normal sub-module to replace the faulty sub-module to work.

[0166] It can be seen that in this embodiment, multiple sub-modules for realizing voltage conversion are provided in a server power supply, and regulation is performed inside the server power supply based on the load status of the server, and the corresponding number of sub-modules is selected to work, so as to achieve the efficient output of the server power supply. While not reducing the service life of the power supply, it is also beneficial to the energy-saving design of the server. Since multiple sub-modules are provided in a server power supply, the output power of a single server power supply is increased, and the number of server power supplies that need to be connected in parallel is reduced, thus solving the contradiction between the volume of the server and the power design of the server power supply.

[0167] It should also be noted that in this specification, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0168] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A server power supply, characterized in that, it includes a gold finger and multiple sub-modules. The input end of each sub-module is connected to an AC power supply, the output end of each sub-module is connected to the first end of the gold finger, the second end of the gold finger is connected to the power supply end of the server, and each sub-module includes: a first controller for outputting a first driving signal according to a first target DC voltage; a first conversion module for converting the AC voltage output by the AC power supply into the first target DC voltage in response to the first driving signal; a second controller for obtaining the load status of the server, judging whether the sub-module where it is located meets the working conditions based on the load status, and if so, outputting a second driving signal according to a second target DC voltage; a second conversion module for converting the first target DC voltage into the second target DC voltage in response to the second driving signal; the second controller in the sub-module that meets the working conditions is further used to judge whether each sub-module that meets the working conditions is in a current balance state. If not, a third driving signal is generated based on the actual output current and the target current of the sub-module where it is located; the second conversion module is used to adjust the output current of the sub-module where it is located to the target current in response to the third driving signal.

2. The server power supply according to claim 1, characterized in that, the first controller is further used to obtain the current signal and voltage signal of the AC power supply, and generate a correction signal based on the voltage signal and the current signal; the first conversion module is further used to perform power factor correction on the AC voltage output by the AC power supply in response to the correction signal.

3. The server power supply according to claim 2, characterized in that, the first conversion module includes a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a first capacitor, a second capacitor, a first switching tube and a first inductor, wherein: the common end after the anode of the first diode is connected to the cathode of the second diode is connected to the first output end of the AC power supply, the common end after the anode of the third diode is connected to the cathode of the fourth diode is connected to the second output end of the AC power supply, the cathode of the first diode is respectively connected to the cathode of the third diode, the first end of the first capacitor and the first end of the first inductor, the second end of the first inductor is respectively connected to the first end of the first switching tube and the anode of the fifth diode, the driving end of the first switching tube is connected to the first controller, the cathode of the fifth diode is connected to the first end of the second capacitor, the anode of the second diode is respectively connected to the anode of the fourth diode, the second end of the first capacitor and the second end of the second capacitor and then grounded, and the second end of the first switching tube is grounded.

4. The server power supply according to claim 1, characterized in that, the second controller is further used to obtain the actual output voltage of the sub-module where it is located; the process of outputting the second driving signal according to the second target DC voltage includes: Output a second drive signal according to the actual output voltage and the second target DC voltage.

5. The server power supply according to claim 1, wherein, the process of obtaining the load status of the server includes: Obtain the output power of the sub-module where it is located to the server, and send the output power to the second controllers of other sub-modules; Based on the total output power of each sub-module to the server, determine the load status of the server.

6. The server power supply according to claim 5, wherein, the process of obtaining the output power of the sub-module where it is located to the server includes: Obtain the actual output current of the sub-module where it is located; Calculate the output power of the sub-module where it is located to the server based on the actual output current.

7. The server power supply according to claim 5, wherein, the process of determining whether the sub-module where it is located meets the working conditions based on the load status includes: Determine the preset range where the total output power is located, and each preset range corresponds to one or more target sub-modules; Judge whether the sub-module where it is located is the target sub-module corresponding to the preset range where the total output power is located; If so, determine that the sub-module where it is located meets the working conditions.

8. The server power supply according to claim 1, wherein, the second controller is further configured to obtain the actual output current of the sub-module where it is located, and send the actual output current to the second controllers of other sub-modules; the process of determining whether each sub-module that meets the working conditions is in a current balance state includes: Judge whether there is a deviation between the output currents of any two sub-modules that meet the working conditions greater than a preset value; If so, determine that each sub-module that meets the working conditions is not in a current balance state; If not, determine that each sub-module that meets the working conditions is in the current balance state.

9. The server power supply according to claim 8, wherein, the process of generating a third drive signal based on the actual output current and the target current of the sub-module where it is located includes: Obtain the average value of the actual output currents of each sub-module that meets the working conditions, and use the average value as the target current; Generate a third drive signal based on the actual output current of the sub-module where it is located and the target current.

10. The server power supply according to claim 1, wherein, the second controller is further configured to judge whether there is an abnormal sub-module among multiple sub-modules, and if so, send an alarm signal to the server; The abnormal sub-module is the sub-module where the second controller that does not send the operation parameters of the sub-module where it is located within a preset time period is located.

11. The server power supply according to claim 1, wherein, the second controller is further configured to output a fourth drive signal when it is determined that the sub-module where it is located does not meet the working conditions; The second conversion module is configured to stop outputting DC voltage in response to the fourth drive signal.

12. The server power supply according to claim 11, wherein, The second controller is further configured to output a trigger signal when it determines that the sub-module where it is located does not meet the working conditions; The first controller is configured to control the first conversion circuit to stop outputting DC voltage when receiving the trigger signal.

13. The server power supply according to any one of claims 1-12, wherein, The second conversion module includes a second switching transistor, a third switching transistor, a third capacitor, a fourth capacitor, a second inductor, a third inductor, a transformer, a sixth diode, and a seventh diode, wherein: The first end of the second switching transistor is connected to the first output end of the first conversion module. The second end of the second switching transistor is respectively connected to the first end of the third capacitor and the first end of the second switching transistor. The second end of the third capacitor is connected to the first end of the second inductor. The second end of the second inductor is respectively connected to the first end of the third inductor and the first end of the primary winding of the transformer. The first end of the first secondary winding of the transformer is connected to the anode of the sixth diode. The cathode of the sixth diode is respectively connected to the cathode of the seventh diode and the first end of the fourth capacitor. The second end of the first secondary winding is respectively connected to the first end of the second secondary winding of the transformer and the second end of the fourth capacitor. The second end of the second secondary winding is connected to the anode of the seventh diode. The second end of the third inductor is respectively connected to the second end of the primary winding, the second end of the third switching transistor, and the second output end of the first conversion module. The second end of the fourth capacitor and the second end of the third switching transistor are both grounded. The control ends of the second switching transistor and the third switching transistor are both connected to the second controller.

14. A server, wherein, It includes a server body and the server power supply according to any one of claims 1-13. The server body is provided with a power supply terminal, and the server power supply is connected to the power supply terminal.

Images