Power supply control device for server fan

Abstract

The embodiment of the present application provides a power supply control device for a server fan, comprising: a first connector and a controller, wherein a plurality of connection ports on the first connector are used to be connected to a plurality of fans in the server in a one-to-one correspondence, and the controller is connected to the first connector; the first connector is used to transmit an electric energy signal to the controller; the controller is used to send a connection instruction to the first connector when the electric energy signal indicates that there is a target fan in a reverse start state; the first connector is also used to adjust the connection state between the plurality of connection ports according to the connection relationship indicated by the connection instruction, and obtain a target connection link, wherein the reverse electric energy is transmitted to the reference fan through the target connection link. Through the present application, the problem of low protection efficiency for reverse start of server fans in the related art is solved, thereby achieving the effect of improving the protection efficiency for reverse start of server fans.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of computers, and more particularly, to a power supply control device for a server fan. Background Art

[0002] When the server fan starts in reverse rotation, reverse electric energy will be generated. Excessive reverse electric energy will damage the components on the fan circuit board. In order to avoid the impact of the reverse rotation start of the fan on the fan circuit board, in the related art, a discharge circuit is configured on each fan circuit board corresponding to the fan to absorb the reverse electric energy generated by the reverse rotation start of the fan. However, on the one hand, the limited space of each fan circuit board results in a small power of the discharge resistor in the discharge circuit, and it is unable to effectively cope with the large amount of reverse electric energy generated when the fan starts in high-speed reverse rotation; on the other hand, configuring multiple discharge circuits will significantly increase the space occupied by the circuit board, resulting in a tight internal space resource of the server, and thus leading to a low protection efficiency for the reverse rotation start of the server fan. Summary of the Invention

[0003] The embodiments of the present application provide a power supply control device for a server fan to at least solve the problem of low protection efficiency for the reverse rotation start of the server fan in the related art.

[0004] According to another embodiment of the present application, there is provided a power supply control device for a server fan, including:

[0005] A first connector and a controller, the controller is connected to the first connector, and each of the multiple connection ports on the first connector is connected to a fan, and different fans are connected to different connection ports;

[0006] The first connector is used to transmit an electric energy signal to the controller, wherein the electric energy signal is used to indicate the reception state of the reverse electric energy of the connection port, and the reverse electric energy is the electric energy generated by the reverse rotation start of the fan;

[0007] The controller is used to send a connection instruction to the first connector when the electric energy signal indicates that there is a target fan in the reverse rotation start state, wherein the connection instruction is used to indicate the connection relationship between the target fan and a reference fan not in the reverse rotation start state;

[0008] The first connector is further used to construct a target connection link between the multiple connection ports in response to the connection instruction, wherein the reverse electric energy is transmitted to the reference fan through the target connection link.

[0009] Optionally, the first connector includes a plurality of target switches, a power supply bus, and a driver. The target switches are arranged in one-to-one correspondence with the connection ports. The first interface of the target switch is connected to the corresponding connection port, and the second interface of each target switch is respectively connected to the power supply bus;

[0010] The driver is configured to generate a switching instruction for each target switch in response to the connection instruction, where the switching instruction is used to indicate the connection state between the corresponding connection port and the power supply bus;

[0011] The target switch adjusts the connection state between the first interface and the second interface in response to the switching instruction.

[0012] Optionally, the driver includes a sub-driver. The sub-driver is configured with a plurality of signal output terminals and a signal input terminal. The signal input terminal is connected to the controller, and the plurality of signal output terminals are respectively connected to the plurality of target switches in one-to-one correspondence;

[0013] The controller is configured to generate a second instruction when the power signal indicates that there is a target fan in the reverse start state. The connection instruction includes the second instruction, and the second instruction is used to indicate connecting the fan in the server to the power supply bus;

[0014] The driver is configured to generate the corresponding switching instruction for the connected target switch in response to the second instruction.

[0015] Optionally, the driver includes a plurality of sub-drivers. The plurality of sub-drivers are respectively arranged in one-to-one correspondence with the plurality of target switches, and the controller is respectively connected to each sub-driver;

[0016] The controller is configured to generate a corresponding first instruction according to the operating state of each fan, where each first instruction is used to indicate the access state of the corresponding fan on the power supply bus, and the connection instruction includes a plurality of the first instructions;

[0017] The sub-driver is configured to generate the corresponding switching instruction for the connected target switch in response to the first instruction.

[0018] Optionally, the driver is configured to output a first level signal and a second level signal. The switching instruction includes the first level signal and the second level signal. The level value of the first level signal is higher than the target level value, and the level value of the second level signal is lower than the target level value. The first level signal is used to indicate connecting the fan to the power supply bus, and the second level signal is used to indicate stopping connecting the fan to the power supply bus.

[0019] Optionally, the target switch is a metal oxide semiconductor transistor. The drain of the metal oxide semiconductor transistor is connected to the power supply bus, the source of the metal oxide semiconductor transistor is connected to the corresponding connection port, and the gate of the metal oxide semiconductor transistor is connected to the driver.

[0020] Optionally, the controller is configured to match the target power value of the target reverse power output by the first connector with a reference power value, where the power signal includes the target power value of the target reverse power; and send the connection instruction to the first connector when the target power value is greater than or equal to the reference power value.

[0021] Optionally, the controller includes a power comparator. The signal output terminal of the power comparator is connected to the first connector, the positive input terminal of the power comparator is connected to the first connector, and the negative input terminal of the power comparator is connected to a reference power supply for outputting power of the reference power value.

[0022] The power comparator is configured to send a third level signal to the first connector when the target power value of the target reverse power is greater than or equal to the reference power value, where the level value of the third level signal is greater than or equal to a preset level value, and the connection instruction includes the third level signal.

[0023] Optionally, the power comparator is further configured to send a fourth level signal to the first connector when the target power value of the target reverse power is less than the reference power value, where the level value of the fourth level signal is less than the preset level value;

[0024] The first connector is further configured to disconnect the connection between any of the connection ports among the multiple connection ports.

[0025] Optionally, the controller further includes a first current limiting resistor and a second current limiting resistor. The first current limiting resistor is connected to the positive output terminal of the power comparator, and the second current limiting resistor is connected to the negative input terminal of the power comparator.

[0026] Optionally, the first connector further includes a connection bus. The first end of the connection bus is respectively connected to the multiple connection ports, and the second end of the connection bus is connected to the controller;

[0027] The connection bus is configured to combine the reverse power received by the multiple connection ports to obtain the power signal; and send the power signal to the controller through the second port of the connection bus.

[0028] Optionally, the first connector further includes a filtering capacitor. One end of the filtering capacitor is connected to the second end of the connection bus, and the other end of the filtering capacitor is grounded.

[0029] Optionally, the power supply control device further includes a discharger and a second connector. The power supply ports on the second connector are respectively connected to a plurality of the fans in the server. The discharge port of the second connector is connected to the discharger, and the controller is connected to the second connector;

[0030] The controller is further configured to send a target instruction to the second connector when the power signal indicates that all the fans in the server are in the reverse start state, where the target instruction is used to indicate establishing a connection relationship between the power supply port and the discharge port of the second connector;

[0031] The second connector is configured to respond to the target instruction and establish a connection relationship between the power supply port and the discharge port;

[0032] The discharger is configured to release the reverse electric energy generated by the fan.

[0033] Optionally, the discharger includes a discharge resistor.

[0034] Optionally, the power supply control device further includes an energy storage device and a second connector. The power supply ports on the second connector are respectively connected to a plurality of the fans in the server. The discharge port of the second connector is connected to the power input end of the energy storage device. The power output port of the energy storage device is connected to the power supply port of the server, and the controller is connected to the second connector;

[0035] The controller is further configured to send a target instruction to the second connector when the power signal indicates that all the fans in the server are in the reverse start state, where the target instruction is used to indicate establishing a connection relationship between the power supply port and the discharge port of the second connector;

[0036] The second connector is configured to respond to the target instruction and establish a connection relationship between the power supply port and the discharge port;

[0037] The energy storage device is configured to recover the reverse electric energy generated by the fan.

[0038] Through this application, when there is a target fan in the reverse startup state in the server, the first connector will receive the reverse electrical energy generated by the reverse startup of the target fan through the connection port with the target fan. Then, the first connector transmits an electrical energy signal to the controller to indicate the reception state of the reverse electrical energy by the connection port. Then, when the electrical energy signal indicates that there is a target fan in the reverse startup state, the controller sends a connection instruction to the first connector to indicate the connection relationship between the target fan and a reference fan not in the reverse startup state. Then, the first connector can respond to the connection instruction to construct a target connection link between multiple connection ports. Then, the reverse electrical energy generated by the target fan can be transmitted to the reference fan through the target connection link. Through the above method, when there is a fan with reverse startup in the server, by adjusting the connection relationship between multiple fans, the reverse electrical energy generated by the fan with reverse startup can be recycled for use by the fans not in the reverse startup state. On the one hand, the reverse startup ability of the server fan is improved. On the other hand, the recycling and utilization of the reverse electrical energy are realized, and the waste of energy is reduced. Therefore, the problem of low protection efficiency for the reverse startup of the server fan in the related art can be solved, and the effect of improving the protection efficiency for the reverse startup of the server fan can be achieved. Description of the Drawings

[0039] Figure 1 is a schematic diagram of a power supply control device for a server fan according to an embodiment of the present application;

[0040] Figure 2 is the hardware connection of a power supply control device for a server fan according to an embodiment of the present application Figure 1 ;

[0041] Figure 3 is the hardware connection of a power supply control device for a server fan according to an embodiment of the present application Figure 2 ;

[0042] Figure 4 is the hardware connection of a power supply control device for a server fan according to an embodiment of the present application Figure 3 ;

[0043] Figure 5 is the hardware connection of a power supply control device for a server fan according to an embodiment of the present application Figure 4 ;

[0044] Figure 6 is the hardware connection of a power supply control device for a server fan according to an embodiment of the present application Figure 5 ;

[0045] Figure 7 is a schematic diagram of an automatic discharge and energy recovery solution for the reverse startup of a fan according to an embodiment of the present application;

[0046] Figure 8 is a schematic diagram of an automatic discharge and energy recovery circuit according to an embodiment of the present application;

[0047] Figure 9 is a control logic flowchart of automatic discharge and energy recovery of a fan according to an embodiment of the present application. Detailed implementation manners

[0048] In the following, embodiments of the present application will be described in detail with reference to the accompanying drawings and in conjunction with the embodiments.

[0049] It should be noted that the terms "first", "second", etc. in the description and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence.

[0050] In this embodiment, a power supply control device for a server fan is provided. Figure 1 is a schematic diagram of a power supply control device for a server fan according to an embodiment of the present application, as Figure 1 shown, the device includes:

[0051] A first connector and a controller, the controller is connected to the first connector, and each of the multiple connection ports on the first connector is connected to a fan, and different fans are connected to different ones of the connection ports;

[0052] The first connector is configured to transmit an electric energy signal to the controller, wherein the electric energy signal is used to indicate the reception state of reverse electric energy of the connection port, and the reverse electric energy is the electric energy generated by the reverse start of the fan;

[0053] The controller is configured to send a connection instruction to the first connector when the electric energy signal indicates that there is a target fan in a reverse start state, wherein the connection instruction is used to indicate the connection relationship between the target fan and a reference fan that is not in a reverse start state;

[0054] The first connector is further configured to construct a target connection link between the multiple connection ports in response to the connection instruction, and the reverse electric energy is transmitted to the reference fan through the target connection link.

[0055] Through the above content, when there is a target fan in the reverse startup state in the server, the first connector will receive the reverse electric energy generated by the reverse startup of the target fan through the connection port with the target fan. Then, the first connector transmits an electric energy signal to the controller for indicating the reception state of the reverse electric energy by the connection port. Then, when the electric energy signal indicates that there is a target fan in the reverse startup state, the controller sends a connection instruction to the first connector for indicating the connection relationship between the target fan and a reference fan not in the reverse startup state. Then, the first connector can respond to the connection instruction to construct a target connection link between multiple connection ports. Then, the reverse electric energy generated by the target fan can be transmitted to the reference fan through the target connection link. Through the above method, when there is a fan in reverse startup in the server, by adjusting the connection relationship between multiple fans, the reverse electric energy generated by the reverse startup fan can be recycled for use by the fans not in the reverse startup state. On the one hand, the reverse startup ability of the server fans is improved. On the other hand, the recycling of reverse electric energy is realized, reducing the waste of energy. Therefore, the problem of low protection efficiency for the reverse startup of server fans in the related art can be solved, and the effect of improving the protection efficiency for the reverse startup of server fans can be achieved. Optionally, in the embodiment of the present application, as Figure 1 shown, the power supply control device of the server fan includes a first connector and a controller. Multiple connection ports on the first connector are respectively connected to multiple fans in the server one by one. For example, port 1 on the first connector is connected to fan 1, port 2 is connected to fan 2, and port N is connected to fan N. Then, the first connector can receive the reverse electric energy generated by the reverse startup of multiple fans through multiple connection ports. The controller is connected to the first connector. Then, when the first connector receives the reverse electric energy generated by the reverse startup fan, it transmits an electric energy signal to the controller for indicating the reception state of the reverse electric energy by the connection port. When the received electric energy signal indicates that there is a target fan in the reverse startup state, the controller sends a connection instruction to the first connector. Then, the first connector can adjust the connection state between multiple connection ports according to the connection relationship indicated by the connection instruction, thereby changing the connection relationship between the target fan and a reference fan not in the reverse startup state to obtain a target connection link. Then, the reverse electric energy generated by the target fan can be transmitted to the reference fan through the target connection link.

[0056] Optionally, in the embodiment of the present application, the electric energy signal is used to indicate the reception state of the reverse electric energy by the connection port on the first connector. The electric energy signal can, but is not limited to, characterize the voltage value of the reverse electric energy, the magnitude relationship between the voltage value of the reverse electric energy and a preset reference voltage, etc. For example, when the voltage value of the reverse electric energy is greater than the preset reference voltage, the electric energy signal is used to indicate that there is currently a fan in the reverse startup state.

[0057] Optionally, in the embodiments of the present application, the controller is configured to screen out a reference fan to be powered among multiple fans when the electrical energy signal indicates that there is a target fan in the reverse start state, and then control the first connector to adjust the connection relationship between the target fan and the reference fan. To achieve the above functions, the connector of the present application may include, but is not limited to, multiple reference switches and drivers. The reference switches are arranged in one-to-one correspondence with the connection ports. The first interface of the reference switch is connected to the corresponding connection port. Each reference switch is further configured with multiple second interfaces respectively connected to other reference switches except the current reference switch. The driver is connected to the controller. The controller determines the target fan currently in the reverse state and the target reverse electrical energy value generated by the target fan in the current reverse state according to the received electrical energy signal. The controller converts the electrical energy demand information of the candidate fan in the current operating state according to the operating state information of the candidate fan, and then screens out a reference fan whose electrical energy demand matches the target reverse electrical energy value among multiple candidate fans, where the candidate fans are the fans other than the target fan among the multiple fans. Then the controller sends a connection instruction indicating the connection between the target fan and the reference fan to the driver. The driver is configured to respond to the connection instruction, control the first reference switch corresponding to the target fan to establish the connection relationship between the first interface and the reference interface in the first reference switch (the reference interface is the interface on the multiple second interfaces of the first reference switch connected to the second reference switch corresponding to the reference fan), and control the second reference switch to establish the connection relationship between the second interface and the candidate interface in the second reference switch (the candidate interface is the interface on the multiple second interfaces of the second reference switch connected to the first reference switch corresponding to the target fan). Through the above implementation manner, the connection relationship between the fans is dynamically adjusted according to the output situation of the reverse electrical energy, the recovery efficiency of the reverse electrical energy is ensured, and the waste of the reverse electrical energy is avoided.

[0058] Optionally, in the embodiments of the present application, the controller may be, but is not limited to, a voltage comparator. For example, when the voltage value of the reverse electrical energy indicated by the electrical energy signal received by the voltage comparator is greater than the discharge threshold reference voltage set at the system end, the voltage comparator sends a connection instruction to the first connector to control the first connector to adjust the connection relationship between the target fan and the reference fan, so that the reverse electrical energy generated by the target fan is directed to the reference fan.

[0059] Optionally, in the embodiments of the present application, after receiving the connection instruction sent by the controller, the first connector adjusts the connection state between multiple connection ports according to the connection relationship indicated by the connection instruction. For example, if the target fan corresponds to port 1 on the first connector, and the reference fans correspond to ports 2, 3, and 4 on the first connector, then the first connector can control ports 1 to be connected to ports 2, 3, and 4. As a result, the reverse electric energy generated by the reverse start of the target fan can be transmitted from port 1 to ports 2, 3, and 4 to multiple reference fans that are not in the reverse start state for use, thereby realizing the recycling of reverse electric energy, reducing energy waste, and at the same time enabling the fan with reverse start to achieve high-power discharge through the discharge path, improving the reverse start ability of the fan.

[0060] As an optional embodiment, the first connector includes multiple target switches, a power supply bus, and a driver. The target switches are arranged in one-to-one correspondence with the connection ports. The first interface of the target switch is connected to the corresponding connection port, and the second interface of each target switch is respectively connected to the power supply bus;

[0061] The driver is configured to generate a switching instruction for each target switch in response to the connection instruction, where the switching instruction is used to indicate the connection state between the corresponding connection port and the power supply bus;

[0062] The target switch adjusts the connection state between the first interface and the second interface in response to the switching instruction.

[0063] Optionally, in the embodiments of the present application, Figure 2 is the hardware connection of a power supply control device for a server fan according to an embodiment of the present application Figure 1 , as Figure 2 shown, the first connector includes multiple target switches, a power supply bus, and a driver. The target switches are arranged in one-to-one correspondence with the connection ports. The first interface of the target switch is connected to the corresponding fan through the corresponding connection port, and the second interface of each target switch is respectively connected to the power supply bus.

[0064] Optionally, in the embodiments of the present application, the driver is configured to receive and respond to the connection instruction sent by the controller, and generate a corresponding switching instruction for each target switch according to the connection instruction to control each target switch to adjust the connection state between the corresponding connection port and the power supply bus. The driver can be, but is not limited to, a circuit or chip that controls MOSFET (Metal Oxide Semiconductor Field Effect Transistor). This solution is not limited thereto.

[0065] Optionally, in the embodiments of the present application, the target switch is configured to receive and respond to a switching instruction sent by the driver, and adjust the connection state between the first interface and the second interface according to the switching instruction. For example, as Figure 2 shown, assume that Fan 1 is the target fan in the reverse start state, and Fan 2 and Fan 3 are reference fans not in the reverse start state. When the controller receives an electrical energy signal indicating the existence of a target fan in the reverse start state, it will send a connection instruction to the driver to adjust the connection relationship between the target fan and the reference fans, that is, control the connection between the target fan and the reference fans so that the reverse electrical energy generated by the target fan is directed to the reference fans. After receiving the connection instruction sent by the controller, the driver will generate corresponding switching instructions for each target switch to control each target switch to adjust the connection state between the corresponding connection port and the power supply bus. Multiple target switches receive and respond to the switching instructions sent by the driver, and adjust the connection state between the first interface and the second interface according to the corresponding switching instructions. For example, if the switching instruction 2 indicates to connect the power supply bus to the connection port 2 of Fan 2, then the target switch 2 controls the connection between the first interface 2 and the second interface 2; if the switching instruction 3 indicates to disconnect the power supply bus from the connection port 3 of Fan 3, then the target switch 3 controls the disconnection between the first interface 3 and the second interface 3. At this time, the reverse electrical energy generated by the target fan (i.e., Fan 1) can be directed to Fan 2 not in the reverse start state through the path between the second interface 2 and the first interface 2, realizing the reverse start discharge of Fan 1 and the recycling of reverse electrical energy.

[0066] Through the above content, by deploying a driver and multiple target switches corresponding to the server fans one by one, the power supply and discharge of multiple fans can be centrally managed, reducing the need for each fan to be individually configured with a discharge circuit, thereby simplifying the circuit layout inside the server and saving space resources.

[0067] As an optional embodiment, the driver includes a sub-driver, and multiple signal output terminals and a signal input terminal are configured on the sub-driver. The signal input terminal is connected to the controller, and multiple signal output terminals are respectively connected to multiple target switches in one-to-one correspondence;

[0068] The controller is configured to generate a second instruction when the electrical energy signal indicates the existence of a target fan in the reverse start state, where the connection instruction includes the second instruction, and the second instruction is used to indicate connecting the fans in the server to the power supply bus;

[0069] The driver is configured to respond to the second instruction and generate corresponding switching instructions for the connected target switches.

[0070] Optionally, in the embodiments of the present application, Figure 3Hardware connection of a power supply control device for a server fan according to an embodiment of the present application Figure 2 , as Figure 3 shown, the driver includes a sub-driver, and multiple signal output terminals are configured on the sub-driver (i.e., Figure 3 Output 1, Output 2, Output 3 shown) and a signal input terminal (i.e., Figure 3 Input shown), the signal input terminal is connected to the controller, and multiple signal output terminals are respectively connected to multiple target switches in one-to-one correspondence, as Figure 3 shown, Output 1 corresponds to connecting to target switch 1, Output 2 corresponds to connecting to target switch 2, and Output 3 corresponds to connecting to target switch 3.

[0071] Optionally, in the embodiment of the present application, when the controller indicates that there is a target fan in the reverse start state in the power signal, it will generate a second instruction for instructing to connect the fans in the server to the power supply bus and send it to the signal input terminal of the sub-driver, that is, when there is a fan with reverse start, the controller will control the sub-driver to connect all the fans in the server to the power supply bus.

[0072] Optionally, in the embodiment of the present application, the driver is used to receive and respond to the second instruction sent by the controller, generate a corresponding switching instruction for the corresponding target switch, and send it to the corresponding target switch through the corresponding signal output terminal, that is, control all target switches to connect the first interface and the second interface.

[0073] Through the above content, when there is a target fan in the reverse start state in the server, by controlling the driver to connect all the fans in the server to the power supply bus, the discharge power of the reverse start fan can be significantly improved, avoiding the problem of small power of the discharge circuit due to limited space of the fan circuit board in the related art, and significantly improving the reverse start ability of the fan.

[0074] As an optional embodiment, the driver includes multiple sub-drivers, and the multiple sub-drivers are respectively arranged in one-to-one correspondence with the multiple target switches, and the controller is respectively connected to each sub-driver;

[0075] The controller is used to generate corresponding first instructions according to the operating state of each fan, wherein each first instruction is used to indicate the access state of the corresponding fan on the power supply bus, and the connection instruction includes multiple first instructions;

[0076] The sub-driver is used to respond to the first instruction and generate the corresponding switching instruction for the connected target switch.

[0077] Optionally, in the embodiment of the present application, Figure 4Hardware connection of a power supply control device for a server fan according to an embodiment of the present application Figure 3 , as Figure 4 shown, the driver includes a plurality of sub-drivers (sub-driver 1, sub-driver 2, sub-driver 3), and the plurality of sub-drivers are respectively and correspondingly arranged with a plurality of target switches, and the controller is respectively connected to each sub-driver.

[0078] Optionally, in the embodiment of the present application, the controller is used to generate a corresponding first instruction according to the operating state of each fan, that is, to connect the running fan to the power supply bus to absorb the reverse electric energy generated by the reverse-starting fan. In this way, while ensuring the discharge of the reverse-starting fan, the power supply power to the normally running fan can be maximally improved, realizing the maximization of energy utilization.

[0079] Optionally, in the embodiment of the present application, the sub-driver is used to respond to the first instruction and generate a corresponding switching instruction for the connected target switch, that is, to control the connection state of the first interface and the second interface of the target switch according to the access state of the corresponding fan indicated by the first instruction on the power supply bus. For example, if the first instruction 1 indicates that the fan 1 is connected to the power supply bus, the target switch 1 controls the connection of the first interface 1 and the second interface 1.

[0080] Through the above content, by determining the access state of the corresponding fan on the power supply bus according to the operating state of each fan, while ensuring the discharge of the reverse-starting fan, the power supply power to the normally running fan can be maximally improved, realizing the maximization of energy utilization.

[0081] As an optional embodiment, the driver is used to output a first level signal and a second level signal, wherein the switching instruction includes the first level signal and the second level signal, the level value of the first level signal is higher than the target level value, the level value of the second level signal is lower than the target level value, the first level signal is used to indicate connecting the fan to the power supply bus, and the second level signal is used to indicate stopping connecting the fan to the power supply bus.

[0082] Optionally, in the embodiment of the present application, the driver is further used to output a first level signal and a second level signal according to the connection instruction sent by the controller. When the connection instruction sent by the controller indicates connecting the fan to the power supply bus, the driver outputs a level signal higher than the target level value. When the connection instruction sent by the controller indicates stopping connecting the fan to the power supply bus, the driver outputs a level signal lower than the target level value.

[0083] As an alternative embodiment, the target switch is a metal-oxide-semiconductor transistor, the drain of the metal-oxide-semiconductor transistor is connected to the power supply bus, the source of the metal-oxide-semiconductor transistor is connected to the corresponding connection port, and the gate of the metal-oxide-semiconductor transistor is connected to the driver.

[0084] Optionally, in the embodiment of the present application, the target switch is a metal-oxide-semiconductor transistor. In the reverse power management circuit of the server fan, a MOSFET (metal-oxide-semiconductor transistor) is used as a fast-response switch. When the driver receives an instruction from the controller to cut off or establish the connection between the fan and the power supply bus, it sends a corresponding control voltage to the gate of the MOSFET to achieve fast conduction or cutoff of the MOSFET.

[0085] As an alternative embodiment, the controller is configured to match the target power value of the target reverse power output by the first connector with a reference power value, where the power signal includes the target power value of the target reverse power; and send the connection instruction to the first connector when the target power value is greater than or equal to the reference power value.

[0086] Optionally, in the embodiment of the present application, the controller is configured to obtain the target power value of the target reverse power output by the first connector and match the target power value with a reference power value. The reference power value can be the discharge threshold reference voltage set at the system end. When the target power value is greater than or equal to the discharge threshold reference voltage set at the system end, it indicates that the bus voltage of the fan driver board has been lifted due to the back electromotive force generated by the reverse rotation and exceeds the safe threshold range. The fan driver board needs to discharge. At this time, the controller sends a connection instruction to the first connector.

[0087] In the above manner, the controller can monitor the reverse power output by the first connector in real time and accurately obtain its target power value. Through the logical judgment of the controller, the system can precisely control the discharge process, avoiding starting the discharge circuit when the reverse power is low or there is no need to discharge, and reducing the ineffective loss of energy.

[0088] As an alternative embodiment, the controller includes a power comparator. The signal output terminal of the power comparator is connected to the first connector, the positive input terminal of the power comparator is connected to the first connector, the negative input terminal of the power comparator is connected to a reference power supply, and the reference power supply is configured to output the power of the reference power value.

[0089] The electric energy comparator is configured to send a third level signal to the first connector when the target electric energy value of the target reverse electric energy is greater than or equal to the reference electric energy value, where the level value of the third level signal is greater than or equal to a preset level value, and the connection instruction includes the third level signal.

[0090] Optionally, in an embodiment of the present application, the controller includes an electric energy comparator. The positive input terminal of the electric energy comparator is connected to the first connector and is configured to obtain the electric energy value of the reverse electric energy generated by the target fan, and its negative input terminal is connected to a reference power supply and is configured to obtain the discharge threshold reference voltage set at the system end. When the target electric energy value of the target reverse electric energy is greater than or equal to the reference electric energy value, it indicates that the bus voltage of the fan drive board is lifted due to the back electromotive force generated by the reverse start and exceeds the safe threshold range, and the fan drive board needs to discharge. The electric energy comparator outputs a high level signal (i.e., the third level signal).

[0091] As an optional embodiment, the electric energy comparator is further configured to send a fourth level signal to the first connector when the target electric energy value of the target reverse electric energy is less than the reference electric energy value, where the level value of the fourth level signal is less than the preset level value;

[0092] The first connector is further configured to disconnect the connection between any of the connection ports among the multiple connection ports.

[0093] Optionally, in an embodiment of the present application, when the target electric energy value of the target reverse electric energy is less than the reference electric energy value, it indicates that the bus voltage of the fan drive board does not need to discharge within the safe threshold range, and the electric energy comparator outputs a low level signal (i.e., the fourth level signal).

[0094] As an optional embodiment, the controller further includes a first current limiting resistor and a second current limiting resistor. The first current limiting resistor is connected to the positive output terminal of the electric energy comparator, and the second current limiting resistor is connected to the negative input terminal of the electric energy comparator.

[0095] Optionally, in an embodiment of the present application, the controller further includes a first current limiting resistor and a second current limiting resistor. The first current limiting resistor is connected to the positive output terminal of the electric energy comparator, and its function is to limit the signal current magnitude output from the electric energy comparator to ensure that the current intensity of the control signal is within a safe range and prevent the components in the first connector from being damaged due to excessive current. The second current limiting resistor is connected to the negative input terminal of the electric energy comparator, and its role is to limit the current input from the reference power supply to the electric energy comparator to protect the electric energy comparator from the influence of overload current.

[0096] By the above, adding the first current-limiting resistor and the second current-limiting resistor in the controller can protect key circuit components such as the power comparator and the first connector, avoid damage caused by overcurrent, and improve the stability and safety of the entire discharge circuit.

[0097] As an alternative embodiment, the first connector further includes a connection bus. The first end of the connection bus is respectively connected to a plurality of the connection ports, and the second end of the connection bus is connected to the controller.

[0098] The connection bus is configured to combine the reverse power received by the plurality of connection ports to obtain the power signal, and send the power signal to the controller through the second port of the connection bus.

[0099] Optionally, in the embodiment of the present application, the first connector further includes a connection bus. The first end of the connection bus is connected to a plurality of connection ports, and these connection ports respectively correspond to each fan in the server; the second end is directly connected to the input end of the controller. When a certain fan in the server starts to reverse and generate reverse power, the reverse power will enter the connection bus through the connection ports in the first connector. At this time, the connection bus combines the reverse power signals received by each connection port to form a unified power signal, which carries the total information of the reverse power generated by all the fans that start to reverse. Subsequently, it is sent to the controller through the second port of the connection bus.

[0100] By the above, by combining the reverse power signals through the connection bus, centralized management and control of the reverse power generated by all the fans in the server starting to reverse can be achieved, avoiding the complexity and resource waste of each fan handling the reverse power separately.

[0101] As an alternative embodiment, the first connector further includes a filter capacitor. One end of the filter capacitor is connected to the second end of the connection bus, and the other end of the filter capacitor is grounded.

[0102] Optionally, in the embodiment of the present application, the first connector further includes a filter capacitor. Since instantaneous voltage fluctuations and noise may be generated during the fan braking discharge process, if directly transmitted to the controller without filtering, it may affect the accuracy of the power comparator and the decision-making process of the controller. The filter capacitor can effectively eliminate the noise in the power signal, improve the purity of the signal, ensure that the controller can accurately obtain the target power value of the reverse power, and avoid misoperation.

[0103] By the above, by deploying the filter capacitor in the first connector, not only the quality of signal transmission is improved, but also the stability and reliability of the system are enhanced, which helps to optimize the power comparison and discharge control logic and achieve more accurate reverse power management.

[0104] As an alternative embodiment, the power supply control device further includes a discharger and a second connector. The power supply ports on the second connector are respectively connected to a plurality of the fans in the server. The discharge port of the second connector is connected to the discharger, and the controller is connected to the second connector;

[0105] The controller is further configured to send a target instruction to the second connector when the electrical energy signal indicates that all the fans in the server are in the reverse start state, where the target instruction is used to indicate establishing a connection relationship between the power supply port and the discharge port of the second connector;

[0106] The second connector is configured to respond to the target instruction and establish a connection relationship between the power supply port and the discharge port;

[0107] The discharger is configured to release the reverse electrical energy generated by the fans.

[0108] Optionally, in the embodiments of the present application, Figure 5 is the hardware connection of a power supply control device for a server fan according to the embodiments of the present application Figure 4 , as Figure 5 shown, the power supply control device further includes a discharger and a second connector. The power supply ports on the second connector are respectively connected to a plurality of fans in the server. The discharge port of the second connector is connected to the discharger, and the controller is connected to the second connector.

[0109] Optionally, in the embodiments of the present application, when the controller monitors that the electrical energy signal indicates that all the fans in the server are in the reverse start state, at this time, since the reverse electrical energy generated by the target fan cannot be directed to the reference fan for consumption, the controller will send a target instruction to the second connector. After receiving the target instruction, the second connector will immediately establish a connection relationship between its power supply port and the discharge port to form a discharge path for the reverse electrical energy. Subsequently, the reverse electrical energy generated by the server fan will directly flow from the discharge port of the second connector to the discharger, and the discharger will consume the energy.

[0110] Through the above content, by introducing a discharger and a second connector, overvoltage damage to the server circuit board caused by high reverse electrical energy can be avoided, especially in high-load scenarios where all fans start in reverse simultaneously, improving the efficiency and safety of reverse electrical energy processing.

[0111] As an alternative embodiment, the discharger includes a discharge resistor.

[0112] Optionally, in the embodiments of the present application, the discharge resistor is a core component in the discharger. Its main function is to convert the reverse electric energy into heat energy and dissipate it, thereby achieving the consumption of reverse electric energy and the protection of the circuit.

[0113] As an alternative embodiment, the power supply control device further includes an energy storage device and a second connector. The power supply ports on the second connector are respectively connected to a plurality of the fans in the server. The discharge port of the second connector is connected to the power input end of the energy storage device. The power output port of the energy storage device is connected to the power supply port of the server. The controller is connected to the second connector;

[0114] The controller is further configured to send a target instruction to the second connector when the electric energy signal indicates that all the fans in the server are in the reverse start state, where the target instruction is used to indicate establishing the connection relationship between the power supply port and the discharge port of the second connector;

[0115] The second connector is configured to respond to the target instruction and establish the connection relationship between the power supply port and the discharge port;

[0116] The energy storage device is configured to recover the reverse electric energy generated by the fans.

[0117] Optionally, in the embodiments of the present application, Figure 6 is the hardware connection of a power supply control device for a server fan according to the embodiments of the present application Figure 5 , as Figure 6 shown, the power supply ports on the second connector are respectively connected to a plurality of fans in the server. The discharge port of the second connector is connected to the power input end of the energy storage device. The power output port of the energy storage device is connected to the power supply port of the server. The controller is connected to the second connector.

[0118] Optionally, in the embodiments of the present application, when the controller monitors that all the fans in the server are in the reverse start state, it will send a target instruction to the second connector. The second connector responds to the target instruction and establishes the electrical connection between its power supply port and the discharge port, guiding the reverse electric energy to the energy storage device for storage. Subsequently, when the server needs additional electric energy, the energy storage device can release the stored energy back to the server power supply system to achieve the recycling of energy.

[0119] Through the above content, by introducing the energy storage device and the second connector, the reverse electric energy is stored through the energy storage device and then released as a backup power supply when the server needs it, significantly improving the energy utilization efficiency and reducing energy waste.

[0120] As an alternative embodiment, in this embodiment, a method and system for reverse-starting a fan in a server fan hot-swap scenario are also provided. A discharge power path is added between the fan and the system fan board, and an energy automatic recovery circuit is added to the system fan board, enabling the fan to achieve automatic high-power discharge through the discharge path during hot-swap, improving the reverse-starting ability of the fan, and through the energy automatic recovery circuit, realizing the recycling of electric energy and reducing energy waste.

[0121] 1. Automatic Discharge and Energy Recovery Scheme:

[0122] Figure 7 It is a schematic diagram of an automatic discharge and energy recovery scheme for reverse-starting a fan according to an embodiment of the present application. As Figure 7 shown, the original discharge circuit and the MCU discharge control program on the fan drive board are deleted to save software and hardware resources. A discharge power line is added between the fan and the system fan board. The discharge power line is led from the bus voltage of each fan drive board to the MOS switch group on the system fan board. After passing through the MOS switch group, the discharge power lines of all fans are connected and converge to form the discharge bus on the system fan board. The discharge bus is connected to the discharge control module as an input signal. The output of the discharge control module is connected to the MOS drive module as an input signal, and the output of the MOS drive module is connected to the MOS switch group as the control signal for the MOS switch.

[0123] The discharge power line is a bidirectional power line. When the target fan brakes and starts, the discharge power line serves as the discharge path after the bus voltage of the target fan drive board is lifted. At the same time, for other normally operating fans, the discharge power line serves as the energy recovery path to charge other fans. The MOS switch group consists of multiple N-MOSs, and its quantity corresponds one-to-one with the number of fan rotors. It is all turned off during normal fan operation. Due to the presence of its body diode, it plays an isolation role to prevent bus voltage crosstalk between fans during normal operation. When the target fan brakes and discharges, all MOSs are turned on. The target fan can discharge through the power line, and other fans can charge through the power line to achieve energy recovery. The discharge bus is the convergence bus of the discharge power lines of each fan after passing through the MOS switch group. The discharge control module collects and compares the voltage of the discharge bus to output different level signals. The MOS drive module can achieve the on-off control of the MOS switch group.

[0124] A server is often equipped with 6 or more fans. The normal operation of each fan consumes a large amount of electrical energy. Taking the 54V - 8086 model fan as an example, the normal operating power of one fan is close to 200W. Therefore, when the target fan is hot-plugged and braked for discharging, the electrical energy released can be completely absorbed and utilized by other running fans. Therefore, this solution not only achieves high-power discharging of the target fan but also realizes the recycling of energy.

[0125] 2. Automatic Discharging and Energy Recycling Circuit:

[0126] Figure 8 It is a schematic diagram of an automatic discharging and energy recycling circuit according to an embodiment of the present application. As Figure 8 shown (taking two fans, that is, four rotors as an example), FAN1 - VBUS is the discharging power line of fan rotor 1, which is connected to the S pole of N - MOS transistor Q1. The power lines of each fan are led out from the D poles of N - MOS transistors Q1, Q2, Q3, and Q4 and are connected together to form a discharging bus VBUS. VBUS is connected to the ground through filtering capacitor C1. The positive input terminal of voltage comparator U1 is VBUS passing through current-limiting resistor R1, and the negative input terminal is the reference voltage V - REF passing through current-limiting resistor R2. The output terminal of U1 is connected to the input terminal of MOS driver U2, and the output terminal of MOS driver U2 is respectively connected to the G poles of N - MOS transistors Q1, Q2, Q3, and Q4.

[0127] The N - MOS transistors Q1, Q2, Q3, and Q4 form a MOS switch group. When the fan is operating normally, the N - MOS transistors are all turned off; C1 is a filtering capacitor used to filter the noise of the power bus; the reference voltage V - REF is the discharging threshold set by the system end; the voltage comparator U1 is used for voltage comparison, that is, when VBUS is equal to or less than the V - REF voltage, U1 outputs a low level, and when VBUS is greater than the V - REF voltage, U1 outputs a high level; R1 and R2 are respectively the current-limiting resistors at the input terminals of U1; the MOS driver U2 is used for switching drive of the N - MOS transistors. When the input signal of U2 is high, it drives the N - MOS transistors to turn on, and when the input signal of U2 is low, it controls the N - MOS transistors to turn off.

[0128] The circuit working principle is as follows: FAN1 performs reverse braking, FAN2, FAN3, and FAN4 operate normally. Due to the back electromotive force generated by the motor braking of FAN1, the bus voltage, i.e., FAN1-VBUS, is lifted. The potential of FAN1-VBUS raises the potential of VBUS through the body diode of Q1. Further, if VBUS is greater than the V-REF voltage, that is, exceeding the discharge threshold set by the system terminal, U1 outputs a high level, and U2 drives the MOS switch group to open, i.e., Q1, Q2, Q3, and Q4 are all turned on. FAN1-VBUS flows through Q1 to VBUS and then through Q2, Q3, and Q4 to FAN2, FAN3, and FAN4, thereby realizing the discharge of FAN1 and the charging of FAN2, FAN3, and FAN4 until VBUS drops to the V-REF voltage, that is, the bus voltage of the fan drops to the safe threshold range. U1 outputs a low level, U2 stops driving the MOS, the MOS switch group is turned off, and fan 1 completes the braking discharge.

[0129] 3. Fan automatic discharge and energy recovery control logic:

[0130] Figure 9 It is a control logic flowchart for fan automatic discharge and energy recovery according to an embodiment of the present application. As Figure 9 shown, the voltage comparator collects and compares the discharge bus voltage VBUS and the discharge threshold reference voltage V-REF set by the system terminal. If the voltage of VBUS is less than or equal to the V-REF voltage, it indicates that the bus voltage of the fan drive board is within the safe threshold range and does not require discharge. The voltage comparator U1 outputs a low level, the MOS driver U2 stops driving the MOS, and the MOS switch group is turned off, that is, the discharge and energy recovery circuit is not opened; if the voltage of VBUS is greater than the V-REF voltage, it indicates that the bus voltage of the fan drive board is lifted due to the back electromotive force generated by braking and exceeds the safe threshold range. The fan drive board needs to discharge. The voltage comparator U1 outputs a high level, and U2 drives the MOS switch group to open, that is, Q1, Q2, Q3, and Q4 are all turned on. FAN1-VBUS flows through Q1 to VBUS and then through Q2, Q3, and Q4 to FAN2, FAN3, and FAN4 until VBUS drops to the V-REF voltage, that is, the bus voltage of the target fan drops to the safe threshold range. U1 outputs a low level, U2 stops driving the MOS, and the MOS switch group is turned off, that is, the discharge and energy recovery circuit is turned off.

[0131] The implementation steps of this solution are as follows:

[0132] 1. Fan drive board circuit and program design: Delete the original braking discharge circuit and the MCU braking discharge control program of the fan drive board, and add a discharge power line between the fan and the system fan board. The discharge power line is led out from the bus of each fan drive board.

[0133] 2. System fan board circuit design: Add a MOS switch group, a discharge control module, and a MOS drive module to achieve automatic high-power discharge and energy recovery of the fan.

[0134] On the one hand, this solution aims at the problem of limited reverse startup ability of existing fans. A discharge power path is added between the fan and the system fan board, enabling the fan to achieve automatic high-power discharge through the discharge path during hot plugging, thereby improving the reverse startup ability of the fan. On the other hand, aiming at the problem of wasted reverse discharge energy of existing fans, an automatic energy recovery circuit is added to the system fan board, realizing the recovery and utilization of electric energy and reducing energy waste.

[0135] For specific examples in this embodiment, reference can be made to the examples described in the above embodiments and exemplary embodiments, and details will not be repeated here.

[0136] Obviously, those skilled in the art should understand that the above-mentioned modules or steps of the present application can be implemented by a general-purpose computing device. They can be concentrated on a single computing device or distributed on a network composed of multiple computing devices. They can be implemented by program codes executable by the computing device, so that they can be stored in a storage device and executed by the computing device. And in some cases, the steps shown or described can be executed in a different order than here, or they can be made into individual integrated circuit modules respectively, or multiple modules or steps among them can be made into a single integrated circuit module to implement. In this way, the present application is not limited to any specific combination of hardware and software.

[0137] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the principle of the present application shall be included in the protection scope of the present application.

Claims

1. A power supply control device for a server fan, It is characterized in that include: A first connector and a controller, the controller is connected to the first connector, each of a plurality of connection ports on the first connector is connected to a fan, and different fans are connected to different connection ports; The first connector is used to transmit an electric energy signal to the controller, wherein the electric energy signal is used to indicate a receiving state of the connection port for reverse electric energy, and the reverse electric energy is electric energy generated by reverse starting of the fan; The controller is configured to send a connection instruction to the first connector when the power signal indicates that there is a target fan in a reverse start state, wherein the connection instruction is used to indicate a connection relationship between the target fan and a reference fan that is not in a reverse start state, the reference fan is selected by the controller from a plurality of candidate fans according to a target reverse power generated by the target fan in a current reverse start state, the power demand of the reference fan matches the target reverse power, and the plurality of candidate fans are fans deployed in the server other than the target fan; The first connector is further used to establish a target connection link between the plurality of connection ports in response to the connection instruction, wherein the reverse electric energy is transmitted to the reference fan through the target connection link; Among them, the first connector includes multiple target switches, a power supply bus and a driver, the target switches and the connection ports are arranged in a one-to-one correspondence, the first interface of the target switch is connected to the corresponding connection port, and the second interface of each target switch is respectively connected to the power supply bus; the driver is used to respond to the connection instruction and generate a switching instruction for each target switch, wherein the switching instruction is used to indicate the connection status between the corresponding connection port and the power supply bus; the target switch adjusts the connection status between the first interface and the second interface in response to the switching instruction.

2. The device according to claim 1, characterized in that The driver comprises a sub-driver, the sub-driver is provided with a plurality of signal output terminals and a signal input terminal, the signal input terminal is connected to the controller, and the plurality of signal output terminals are respectively connected to the plurality of target switches in a one-to-one correspondence; The controller is configured to generate a second instruction when the power signal indicates that there is a target fan in a reverse start state, wherein the connection instruction includes the second instruction, and the second instruction is used to instruct to connect the fan in the server to the power supply bus; The driver is used to respond to the second instruction and generate the corresponding switching instruction for the connected target switch.

3. The device according to claim 1, characterized in that The driver comprises a plurality of sub-drivers, the plurality of sub-drivers are respectively arranged in one-to-one correspondence with the plurality of target switches, and the controller is respectively connected to each of the sub-drivers; The controller is used to generate a corresponding first instruction according to the operating state of each fan, wherein each first instruction is used to indicate the connection state of the corresponding fan on the power supply bus, and the connection instruction includes a plurality of the first instructions; The sub-driver is used to respond to the first instruction and generate the corresponding switching instruction for the connected target switch.

4. The device according to claim 1, characterized in that The driver is used to output a first level signal and a second level signal, wherein the switching instruction includes the first level signal and the second level signal, the level value of the first level signal is higher than the target level value, the level value of the second level signal is lower than the target level value, the first level signal is used to indicate connecting the fan to the power supply bus, and the second level signal is used to indicate stopping connecting the fan to the power supply bus.

5. The device according to claim 1, characterized in that The target switch is a metal oxide semiconductor transistor, a drain of the metal oxide semiconductor transistor is connected to the power supply bus, a source of the metal oxide semiconductor transistor is connected to the corresponding connection port, and a gate of the metal oxide semiconductor transistor is connected to the driver.

6. The device according to claim 1, characterized in that The controller is used to match the target electric energy value of the target reverse electric energy output by the first connector with a reference electric energy value, wherein the electric energy signal includes the target electric energy value of the target reverse electric energy; and send the connection instruction to the first connector when the target electric energy value is greater than or equal to the reference electric energy value.

7. The device according to claim 6, characterized in that The controller comprises an electric energy comparator, wherein a signal output terminal of the electric energy comparator is connected to the first connector, a positive input terminal of the electric energy comparator is connected to the first connector, and a negative input terminal of the electric energy comparator is connected to a reference power supply, and the reference power supply is used to output electric energy of the reference electric energy value; The electric energy comparator is used to send a third level signal to the first connector when the target electric energy value of the target reverse electric energy is greater than or equal to the reference electric energy value, wherein the level value of the third level signal is greater than or equal to a preset level value, and the connection instruction includes the third level signal.

8. The device according to claim 7, characterized in that The electric energy comparator is further configured to send a fourth level signal to the first connector when the target electric energy value of the target reverse electric energy is less than the reference electric energy value, wherein the level value of the fourth level signal is less than the preset level value; The first connector is further used to disconnect any connection ports among the plurality of connection ports.

9. The device according to claim 7, characterized in that The controller further includes a first current limiting resistor and a second current limiting resistor, wherein the first current limiting resistor is connected to the positive output terminal of the electric energy comparator, and the second current limiting resistor is connected to the negative input terminal of the electric energy comparator.

10. The device according to claim 1, characterized in that The first connector further comprises a connection bus, a first end of the connection bus is respectively connected to the plurality of connection ports, and a second end of the connection bus is connected to the controller; The connection bus is used to combine the reverse electric energy received by the plurality of connection ports to obtain the electric energy signal; The electric energy signal is sent to the controller through the second port of the connection bus.

11. The device according to claim 10, characterized in that The first connector further includes a filter capacitor, one end of which is connected to the second end of the connection bus, and the other end of which is grounded.

12. The device according to claim 1, characterized in that The power supply control device further includes a discharger and a second connector, the power supply ports on the second connector are respectively connected to the plurality of fans in the server, the discharge port of the second connector is connected to the discharger, and the controller is connected to the second connector; The controller is further configured to send a target instruction to the second connector when the power signal indicates that all the fans in the server are in a reverse start state, wherein the target instruction is used to indicate the connection relationship between the power supply port and the discharge port of the second connector; The second connector is used to respond to the target instruction and establish a connection relationship between the power supply port and the discharge port; The discharger is used to release the reverse electric energy generated by the fan.

13. The device according to claim 12, characterized in that The arrester includes a discharge resistor.

14. The device according to claim 1, characterized in that The power supply control device further includes an energy storage device and a second connector, the power supply port on the second connector is respectively connected to the plurality of fans in the server, the discharge port of the second connector is connected to the power input end of the energy storage device, the power output port of the energy storage device is connected to the power supply port of the server, and the controller is connected to the second connector; The controller is further configured to send a target instruction to the second connector when the power signal indicates that all the fans in the server are in a reverse start state, wherein the target instruction is used to indicate the connection relationship between the power supply port and the discharge port of the second connector; The second connector is used to respond to the target instruction and establish a connection relationship between the power supply port and the discharge port; The energy storage device is used to recover the reverse electric energy generated by the fan.

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