A driving circuit, a power fan driving method and a power system

Abstract

The application discloses a driving circuit, a power fan driving method and a power supply system, and relates to the technical field of power supply. The driving circuit is used for driving a power fan and comprises a power input module, a primary capacitor module, a main path output module, an auxiliary path output module and a controller. The power input module is used for receiving an input voltage. The power input module is connected with the primary capacitor module. The primary capacitor module is further connected with the main path output module and the auxiliary path output module. The auxiliary path output module is connected with the power fan through a first branch. A secondary capacitor unit in the main path output module is connected with the power fan through a second branch. The controller is connected with the power fan, sends a rotating speed modulation signal to the power fan, and acquires the rotating speed of the power fan. The controller is further connected with the power input module to monitor the power supply state of the driving circuit. According to the technical scheme disclosed in the application, power supply can be maintained to the power fan after the power supply is powered off, and the residual heat in the power supply can be taken away.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power supply, in particular to a driving circuit, a power supply fan driving method and a power supply system. BACKGROUND

[0002] With the improvement of server computing power, the power required by a single server is constantly improving, and the power density of its power module is getting larger and larger, making the heat dissipation problem of high-power-density power supply more and more serious in limited server space. Inside the server case, it is a common heat dissipation scheme to drive a heat dissipation power fan for air cooling by a server power supply. Generally, a server power supply has two output buses of 54V main road output and 12V auxiliary road output. The main road output has the characteristics of high output power and strong load driving capability, and is used to power the core components such as server mainboards, central processing units and image processing units; and the auxiliary road output is used to power the electronic components inside the power supply before the main road output of the power supply is established, and has a lower output power. The power consumption of the heat dissipation power fan during full load operation is much higher than the output power provided by the auxiliary road output of the power supply, so the main road output of the power supply can only be selected to power the heat dissipation power fan. The process of power supply power-off is that the main road output is powered off first, and the auxiliary road output is powered off later. After the main road output of the power supply is powered off, the heat dissipation power fan stops, and the residual heat inside the power supply cannot be quickly removed, which easily causes the temperature inside the power supply to exceed the set over-temperature protection point temperature, so that the power supply cannot be started again due to triggering of the over-temperature protection. The accumulation of residual heat also causes the electronic components inside the power supply to fail due to high temperature when repeatedly starting, so that the power supply cannot work normally. SUMMARY

[0003] The present application provides a driving circuit, a power supply fan driving method and a power supply system, which at least solve the problem that heat accumulates inside the power supply due to the heat dissipation power fan stopping too early in the power-off timing of the power supply, affecting the normal repeated start of the power supply.

[0004] In a first aspect, the present application provides a driving circuit for driving a power supply fan, the driving circuit comprising: a power input module, a primary capacitor module, a main road output module, an auxiliary road output module and a controller.

[0005] The main road output module comprises a secondary capacitor unit and a redundant isolation unit.

[0006] The power input module is used for receiving an input voltage, the power input module is connected with the primary capacitor module, the primary capacitor module is further connected with the main road output module and the auxiliary road output module, the auxiliary road output module is connected with the power supply fan through a first branch, and the secondary capacitor unit is connected with the power supply fan through a second branch.

[0007] The controller is connected with the power fan, sends a rotating speed modulation signal to the power fan, and acquires the rotating speed of the power fan, and the controller is also connected with the power input module to monitor the power supply state of the driving circuit;

[0008] The controller is configured to send a first rotating speed modulation signal to the power fan and shut down the redundant isolation unit according to the power supply state;

[0009] The controller is also configured to monitor and control the first branch to supply power to the power fan according to the voltage of the secondary capacitor unit and the rotating speed of the power fan.

[0010] Further, the first branch includes a first transistor and a first diode;

[0011] The first transistor has a first transistor first pole, a first transistor second pole and a first transistor third pole;

[0012] The first transistor second pole is connected with the auxiliary road output module as one end of the first branch, the first transistor third pole is connected with the anode of the first diode, and the cathode of the first diode is connected with the power fan as the other end of the first branch;

[0013] The first transistor first pole is connected with the controller to receive the first branch control signal transmitted by the controller.

[0014] Further, the second branch includes a second diode;

[0015] The anode of the second diode is connected with the secondary capacitor unit as one end of the second branch, and the cathode of the second diode is connected with the power fan as the other end of the second branch.

[0016] Further, the driving circuit further includes an output bus;

[0017] At least one redundant power supply is connected to the output bus;

[0018] The main road output module is connected with the output bus;

[0019] The redundant isolation unit is also connected with the power fan through a third branch;

[0020] The output bus is connected with the power fan through a fourth branch.

[0021] Further, the third branch includes a third diode;

[0022] The anode of the third diode is connected with the redundant isolation unit as one end of the third branch, and the cathode of the third diode is connected with the power fan as the other end of the third branch.

[0023] Further, the fourth branch includes a fourth diode;

[0024] An anode of the fourth diode is connected with the output bus as one end of the fourth branch, and a cathode of the fourth diode is connected with the power fan as the other end of the fourth branch.

[0025] Further, the driving circuit further comprises a fuse;

[0026] The other end of the first branch, the other end of the second branch, the other end of the third branch and the other end of the fourth branch are connected, and are connected with the power fan after being connected in series with the fuse.

[0027] Further, the main path output module further comprises a main path voltage conversion unit, a synchronous rectification unit and an output control unit;

[0028] One end of the main path voltage conversion unit is connected to the primary capacitor module, the other end of the main path voltage conversion unit is connected with one end of the synchronous rectification unit, the other end of the synchronous rectification unit is connected with one end of the secondary capacitor unit, the other end of the secondary capacitor unit is connected with one end of the output control unit, the other end of the output control unit is connected with one end of the redundancy isolation unit, and the other end of the redundancy isolation unit is connected to the output bus.

[0029] Further, the auxiliary path output module comprises an auxiliary path voltage conversion unit and a secondary output unit;

[0030] One end of the auxiliary path voltage conversion unit is connected to the primary capacitor module, the other end of the auxiliary path voltage conversion unit is connected with one end of the secondary output unit, and the other end of the secondary output unit is connected with one end of the first branch.

[0031] Further, the power input module comprises a rectification unit and a power factor correction unit;

[0032] One end of the rectification unit is used for receiving an input voltage, the other end of the rectification unit is connected with one end of the power factor correction unit, and the other end of the power factor correction unit is connected to the primary capacitor module.

[0033] In a second aspect, the application further provides a power fan driving method, applied to a controller in the driving circuit in the first aspect, and the power fan driving method comprises:

[0034] Obtaining a power supply state of the driving circuit, the power supply state at least comprising a power supply interruption;

[0035] In response to the driving circuit having the power supply interruption and the power supply independently supplying power to the load, a first rotating speed modulation signal is sent to the power fan driven by the driving circuit;

[0036] Turning off the redundancy isolation unit in the power main path output module in the driving circuit;

[0037] The voltage of the auxiliary capacitor unit in the drive circuit and the rotation speed of the power fan are monitored, and the first branch is controlled to be turned on to supply power to the power fan according to the voltage of the auxiliary capacitor unit and the rotation speed of the power fan.

[0038] Further, after the first branch is controlled to be turned on to supply power to the power fan according to the voltage of the auxiliary capacitor unit and the rotation speed of the power fan, the method further comprises:

[0039] The temperature of the temperature sensor in the power supply is obtained, and the power fan is turned off according to the temperature of the temperature sensor.

[0040] Further, the power fan is turned off according to the temperature of the temperature sensor, comprising:

[0041] In response to the temperature of any temperature sensor being reduced to below a temperature threshold, the first branch is controlled to be turned off to cut off the power supply to the power fan;

[0042] Or a third rotation speed modulation signal is sent to the power fan to control the power fan to stop rotating.

[0043] Further, the power fan driving method further comprises:

[0044] In response to receiving a power-on instruction, the first branch is controlled to be turned on, and a first rotation speed modulation signal is sent to the power fan;

[0045] The temperature of the temperature sensor in the power supply is obtained, and the rotation speed of the power fan is adjusted according to the temperature of the temperature sensor.

[0046] Further, the temperature sensor is arranged at least at the inside of the power supply and the air inlet of the power fan to monitor the inside temperature of the power supply and the air inlet temperature, obtain the temperature of the temperature sensor in the power supply, and adjust the rotation speed of the power fan according to the temperature of the temperature sensor, comprising:

[0047] In response to the inside temperature of the power supply being lower than the over-temperature protection temperature, the over-temperature protection power supply of the power supply is shielded, and the main branch output module is turned on;

[0048] The first branch is turned off, and a second rotation speed modulation signal is sent to the power fan;

[0049] In response to the air inlet temperature being reduced to below the over-temperature protection temperature, the over-temperature protection power supply of the power supply is turned on;

[0050] The temperature of the temperature sensor is continuously obtained, and the rotation speed of the power fan is adjusted according to the temperature of the temperature sensor.

[0051] Further, the temperature of the temperature sensor in the power supply is obtained, and the rotation speed of the power fan is adjusted according to the temperature of the temperature sensor, further comprising:

[0052] In response to the temperature of any temperature sensor being greater than a first risk temperature, the first branch is turned on, and a first rotation speed modulation signal is sent to the power supply fan;

[0053] In response to the temperature of any temperature sensor being reduced to below the first risk temperature, the over-temperature protection of the power supply is shielded, the main branch output module is turned on, and the output control unit in the main branch output module is turned off;

[0054] The first branch is turned off, and a second rotation speed modulation signal is sent to the power supply fan;

[0055] In response to the temperature of any temperature sensor being reduced to below a second risk temperature, the output control unit is turned on;

[0056] The temperature of the temperature sensor is continuously acquired, and the rotation speed of the power supply fan is adjusted according to the temperature of the temperature sensor;

[0057] The first risk temperature is greater than the second risk temperature.

[0058] Further, the power supply fan driving method further comprises:

[0059] In response to the power supply implementing over-temperature protection, the output bus voltage is acquired;

[0060] The rotation speed of the power supply fan is adjusted according to the voltage of the output bus;

[0061] In response to the temperature of any temperature sensor being reduced to below the second risk temperature, the power supply is restarted, and the rotation speed of the power supply fan is adjusted according to the temperature of the temperature sensor.

[0062] Further, the rotation speed of the power supply fan is adjusted according to the voltage of the output bus, comprising:

[0063] In response to the output bus voltage being normal, a second rotation speed modulation signal is sent to the power supply fan;

[0064] In response to the output bus voltage being abnormal, a second rotation speed modulation signal is sent to the power supply fan, and the output control unit in the main branch output module is turned off;

[0065] In response to the voltage of the primary side capacitor module being reduced to below a preset voltage, the first branch is turned on, and a first rotation speed modulation signal is sent to the power supply fan.

[0066] Further, the rotation speed of the power supply fan is adjusted according to the temperature of the temperature sensor, comprising:

[0067] The rotation speed of the power supply fan is determined according to FS=BS+OL+OT, wherein FS is the rotation speed of the power supply fan, BS is a basic rotation speed, OL is a load bias on the rotation speed, and OT is a temperature bias on the rotation speed.

[0068] In a third aspect, the application provides a power supply system, any power supply in the power supply system comprising the drive circuit of the first aspect, the controller in the drive circuit being configured to execute the power supply fan drive method of the second aspect, comprising:

[0069] acquiring a voltage of a power input port;

[0070] in response to the voltage of the power input port being powered down, sending a first rotating speed modulation signal to the power supply fan;

[0071] at a preset time after the voltage of the power input port is powered down, sending a shutdown signal to a redundant isolation unit in a power supply main path output module;

[0072] acquiring a voltage of a primary side capacitor module and a rotating speed of the power supply fan, and controlling the first branch to supply power to the power supply fan according to the voltage of the primary side capacitor module and the rotating speed of the power supply fan.

[0073] In a fourth aspect, the application provides a computer readable storage medium, the computer readable storage medium storing a power supply fan drive program, the power supply fan drive program being executed by a controller to implement the power supply fan drive method of the second aspect, comprising:

[0074] acquiring a voltage of a power input port;

[0075] in response to the voltage of the power input port being powered down, sending a first rotating speed modulation signal to the power supply fan;

[0076] at a preset time after the voltage of the power input port is powered down, sending a shutdown signal to a redundant isolation unit in a power supply main path output module;

[0077] acquiring a voltage of a primary side capacitor module and a rotating speed of the power supply fan, and controlling the first branch to supply power to the power supply fan according to the voltage of the primary side capacitor module and the rotating speed of the power supply fan.

[0078] In a fifth aspect, the application provides a computer program product, the computer program product comprising a computer program, the computer program being executed by a controller to implement the power supply fan drive method of the second aspect, comprising:

[0079] acquiring a voltage of a power input port;

[0080] in response to the voltage of the power input port being powered down, sending a first rotating speed modulation signal to the power supply fan;

[0081] at a preset time after the voltage of the power input port is powered down, sending a shutdown signal to a redundant isolation unit in a power supply main path output module;

[0082] The voltage of the primary capacitor module and the rotation speed of the power fan are acquired, and the first branch is controlled to supply power to the power fan according to the voltage of the primary capacitor module and the rotation speed of the power fan.

[0083] The technical scheme provided by the embodiment of the present application has the beneficial effects that: by implementing the driving circuit, the power fan driving method and the power supply system provided by the embodiment of the present application, the auxiliary road output module can be used to maintain power supply to the power fan after the power supply is powered off, the rotation speed of the power fan is adjusted to take away the internal residual heat of the power supply, and the normal function of the power supply and the safe work of the internal electronic components of the power supply are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0084] In order to more clearly illustrate the technical scheme in the embodiment of the present application, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0085] Figure 1 is a schematic diagram of a driving circuit provided by the embodiment of the present application;

[0086] Figure 2 is another schematic diagram of a driving circuit provided by the embodiment of the present application;

[0087] Figure 3 is a schematic diagram of a driving circuit including a fuse provided by the embodiment of the present application;

[0088] Figure 4 is a schematic diagram of a main road output module provided by the embodiment of the present application;

[0089] Figure 5 is a schematic diagram of an auxiliary road output module provided by the embodiment of the present application;

[0090] Figure 6 is a schematic diagram of a power supply input module provided by the embodiment of the present application;

[0091] Figure 7 is a schematic diagram of a whole power fan driving circuit provided by the embodiment of the present application;

[0092] Figure 8 is a schematic diagram of an equivalent power fan driving circuit provided by the embodiment of the present application;

[0093] Figure 9 is a schematic diagram of a power fan driving method provided by the embodiment of the present application;

[0094] Figure 10 is another schematic diagram of a power fan driving method provided by the embodiment of the present application;

[0095] Figure 11 is another power fan driving method schematic diagram provided by an embodiment of the present application;

[0096] Figure 12 is another power fan driving method schematic diagram provided by an embodiment of the present application;

[0097] Figure 13 is another power fan driving method schematic diagram provided by an embodiment of the present application;

[0098] Figure 14 is another power fan driving method schematic diagram provided by an embodiment of the present application;

[0099] Figure 15 is another power fan driving method schematic diagram provided by an embodiment of the present application;

[0100] Figure 16 is another power fan driving method schematic diagram provided by an embodiment of the present application; DETAILED DESCRIPTION

[0101] In order to make the objects, technical solutions and advantages of the present application clearer, the following will combine the drawings in the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0102] Unless otherwise defined, technical terms or scientific terms used in the present disclosure shall be understood as having the same meaning as commonly understood by one of ordinary skill in the art to which the present disclosure belongs. The terms "first", "second", and similar terms used in the present disclosure do not denote any order, quantity, or importance, but are used to distinguish different components. Similarly, the terms "one", "a", or "the" and similar terms do not denote a quantity restriction, but mean that at least one exists. The numbers in the drawings of the specification only represent the distinction of the respective functional components or modules, and do not represent the logical relationship between the components or modules. The terms "include" or "contain" and similar terms mean that the elements or objects before the terms encompass the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects. The terms "connect" or "connected" and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "up", "down", "left", "right", and the like only represent relative positional relationships, which can change when the absolute positions of the described objects change.

[0103] Hereinafter, various embodiments according to the present disclosure will be described in detail with reference to the accompanying drawings. It should be noted that in the drawings, the same reference numerals are assigned to components having substantially the same or similar structure and function, and repetitive descriptions thereof will be omitted.

[0104] For the heat dissipation power supply fan powered by the power supply, after the power supply is powered off, the heat is accumulated in the power supply due to the too early stop of the power supply power-off timing, which affects the normal repeated start of the power supply. The present application provides the following implementation:

[0105] In some embodiments, the driving circuit for driving the power supply fan 100 in the power supply, as shown in Figure 1 The driving circuit includes a power input module 200, a primary capacitor module 300, a main path output module 400, an auxiliary path output module 500, and a controller 600.

[0106] The main path output module 400 includes a secondary capacitor unit 430 and a redundant isolation unit 450.

[0107] The power input module 200 is used to receive an input voltage, and the power input module 200 is connected with the primary capacitor module 300. The primary capacitor module 300 is also connected with the main path output module 400 and the auxiliary path output module 500. The auxiliary path output module 500 is connected with the power supply fan 100 through a first branch B1, and the secondary capacitor unit 430 is connected with the power supply fan 100 through a second branch B2.

[0108] The controller 600 is connected with the power supply fan 100, sends a rotating speed modulation signal to the power supply fan 100, and acquires the power supply fan rotating speed of the power supply fan 100. The controller 600 is also connected with the power input module 200 to monitor the power supply state of the driving circuit.

[0109] The controller 600 is configured to send a first rotating speed modulation signal to the power supply fan 100 and shut down the redundant isolation unit 450 according to the power supply state. Specifically, the power supply state is that the power supply AC input is powered off, and the power supply independently supplies power to the load.

[0110] The controller 600 is also configured to monitor and control the first branch B1 to be turned on to supply power to the power supply fan 100 according to the voltage of the secondary capacitor unit 430 and the power supply fan rotating speed of the power supply fan.

[0111] After the above configuration of the driving circuit, the power supply fan can be maintained by the auxiliary path output module after the input of the power supply is cut off, the residual heat in the power supply is taken away, the function of the power supply is normal when it is started again, and the electronic components in the power supply do not fail due to high temperature, and can work safely.

[0112] Specifically, as shown in Figure 2As shown, the first branch B1 includes: a first transistor T1 and a first diode D1;

[0113] The first transistor T1 has: a first transistor first pole T 11 , a first transistor second pole T 12 and a first transistor third pole T 13 .

[0114] The first transistor first pole T 11 is a gate, the first transistor second pole T 12 is a drain, and the first transistor third pole T 13 is a source.

[0115] The first transistor second pole T 12 is connected to the auxiliary path output module 500 as one end of the first branch B1, the first transistor third pole T 13 is connected to the anode of the first diode D1, and the cathode of the first diode D1 is connected to the power fan 100 as the other end of the first branch B1;

[0116] The first transistor first pole T 11 is connected to the controller 600 and receives the first branch control signal transmitted by the controller 600.

[0117] Specifically, the second branch B2 includes: a second diode D2;

[0118] The anode of the second diode D2 is connected to the auxiliary capacitor unit 430 as one end of the second branch B2, and the cathode of the second diode D2 is connected to the power fan 100 as the other end of the second branch B2.

[0119] Figure 2 It is also shown in the figure that the driving circuit further includes an output bus 700;

[0120] At least one redundant power supply is connected to the output bus 700;

[0121] The main path output module 400 is connected to the output bus 700;

[0122] The redundant isolation unit 450 is also connected to the power fan 100 through a third branch B3;

[0123] The output bus 700 is connected to the power fan 100 through a fourth branch B4.

[0124] Specifically, the third branch B3 includes a third diode D3;

[0125] The anode of the third diode D3 is connected to the redundant isolation unit 450 as one end of the third branch B3, and the cathode of the third diode D3 is connected to the power fan 100 as the other end of the third branch B3.

[0126] Specifically, the fourth branch B4 includes a fourth diode D4;

[0127] The anode of the fourth diode D4 is connected with the output bus 700 as one end of the fourth branch B4, and the cathode of the fourth diode D4 is connected with the power fan 100 as the other end of the fourth branch B4.

[0128] The first diode D1 in the first branch B1, the second diode D2 in the second branch B2, the third diode D3 in the third branch B3, and the fourth diode D4 in the fourth branch B4 can avoid reverse current flow in each branch to protect the normal operation of the power module.

[0129] Preferably, as shown in Figure 3 the driving circuit further includes a fuse F;

[0130] The other end of the first branch B1, the other end of the second branch B2, the other end of the third branch B3, and the other end of the fourth branch B4 are connected, and are connected with the power fan 100 after being connected in series with the fuse F.

[0131] The fuse in the above driving circuit can timely cut off the short circuit path from the bus to the power fan when the internal power supply line of the power fan is abnormal, avoiding the output bus voltage being pulled down to ground short circuit due to internal failure of the power fan.

[0132] As shown in Figure 4 the main path output module 400 further includes a main path voltage conversion unit 410, a synchronous rectification unit 420, and an output control unit 440;

[0133] One end of the main path voltage conversion unit 410 is connected to the primary capacitor module 300, the other end of the main path voltage conversion unit 410 is connected with one end of the synchronous rectification unit 420, the other end of the synchronous rectification unit is connected with one end of the secondary capacitor unit 430, the other end of the secondary capacitor unit 430 is connected with one end of the output control unit 440, the other end of the output control unit 440 is connected with one end of the redundant isolation unit 450, and the other end of the redundant isolation unit 450 is connected to the output bus 700.

[0134] As shown in Figure 5 the auxiliary path output module 500 includes an auxiliary path voltage conversion unit 510 and a secondary output unit 520;

[0135] One end of the auxiliary path voltage conversion unit 510 is connected to the primary capacitor module 300, the other end of the auxiliary path voltage conversion unit 510 is connected with one end of the secondary output unit 520, and the other end of the secondary output unit 520 is connected with one end of the first branch B1.

[0136] As Figure 6 shown in FIG. 1, the power input module 200 includes a rectifier unit 210 and a power factor correction unit 220.

[0137] One end of the rectifier unit 210 is used to receive an input voltage, the other end of the rectifier unit 210 is connected to one end of the power factor correction unit 220, and the other end of the power factor correction unit 220 is connected to the primary capacitor module 300.

[0138] The controller in the drive circuit is used to perceive environmental parameters, process information and control actuators. Preferably, a microcontroller unit (MCU) is widely used in various electronic devices requiring intelligent control.

[0139] It should be noted that the power supply in the present application is redundantly configured, and the power output end is connected to the output bus, and then the output bus is used to supply power to the load. In the redundantly configured power supply system, turning off the output control unit 440 of a certain power supply can cut off the output of the power supply to the output bus, so that the output of the power supply is isolated. The redundant isolation unit 450 is also controlled by the output control unit 440, and when the controller controls the output control unit 440 to be turned off, the redundant isolation unit no longer provides the output voltage of the power supply main road output module to the output bus.

[0140] By implementing the drive circuit provided by the embodiments of the present application, the auxiliary road output module can maintain power supply to the power supply fan after the power supply is shut down, the power supply fan speed is adjusted to remove the internal excess heat of the power supply, and the normal function of the power supply and the safe work of the internal electronic components of the power supply are ensured.

[0141] Figure 7 The overall drive circuit schematic diagram of the power supply fan is shown. Among them, the branch marked with 12VSB is the first branch, the branch marked with 12VC is the second branch, the branch marked with 12VF is the third branch, and the branch marked with 12V is the fourth branch.

[0142] Figure 8 The equivalent drive circuit schematic diagram of the power supply fan is shown. The on-off of Q1, Q2 and Q3 respectively represents the on-off of the first branch, the second branch and the third branch. PSU0 represents a redundant power supply connected to the bus. PSU1 represents a power supply for controlling the internal power supply fan, MCU1 represents the controller of PSU1, and FAN1 is the power supply fan of PSU1.

[0143] In other embodiments, as Figure 9 shown in FIG. 2, a power supply fan driving method is applied to the controller in the drive circuit described above, and the method comprises:

[0144] A100: obtaining a power supply state of the driving circuit, the power supply state at least including a power supply interruption;

[0145] A200: in response to the driving circuit having the power supply interruption and the power supply independently supplying power to the load, sending a first rotating speed modulation signal to the power supply fan driven by the driving circuit;

[0146] A300: turning off a redundant isolation unit in a power supply main path output module of the driving circuit;

[0147] A400: monitoring a voltage of a secondary side capacitor unit in the driving circuit and a power supply fan rotating speed of the power supply fan, and controlling the first branch to be turned on to supply power to the power supply fan according to the voltage of the secondary side capacitor unit 430 and the power supply fan rotating speed.

[0148] In the case that the power supply AC input voltage is normal and the output is also normal, the power supply fan driving method is as shown in Figure 10 The controller sends a turn-off signal to the first electrode of the first transistor, the turn-off signal is a low-level signal, the auxiliary path output module is cut off to supply power to the power supply fan, and the secondary side capacitor unit, the redundant isolation unit and the bus supply power to the power supply fan, and the rotating speed of the power supply fan is adjusted according to the temperature of the temperature sensor.

[0149] In the case that the power supply AC input voltage is abnormal and the power supply bus voltage is normal (i.e. the power supply redundant power supply), the power supply fan driving method is as shown in Figure 11 The controller sends a turn-off signal to the first electrode of the first transistor, the turn-off signal is a low-level signal, the auxiliary path output module is cut off to supply power to the power supply fan, and the bus supplies power to the power supply fan, sends a second rotating speed modulation signal to the power supply to control the power supply fan to rotate at full speed; when it is monitored that the temperature of the temperature sensor is reduced to below the temperature threshold, the power supply fan is controlled to stop rotating.

[0150] Further, according to the voltage of the secondary side capacitor unit and the power supply fan rotating speed, the first branch is controlled to be turned on to supply power to the power supply fan, and further comprising:

[0151] A500: obtaining the temperature of the temperature sensor in the power supply, and closing the power supply fan according to the temperature of the temperature sensor.

[0152] Further, according to the temperature of the temperature sensor, the power supply fan is closed, including:

[0153] In response to any temperature sensor being reduced to below the temperature threshold, A510a: the first branch is controlled to be turned off to cut off the power supply of the first branch to the power supply fan;

[0154] Or A510b: sending a third rotating speed modulation signal to the power supply fan to control the power supply fan to stop rotating.

[0155] Power supply interruption refers to that the voltage at the input end of the power supply no longer supplies power to the power supply system. The power supply interruption state can be caused by input power failure or normal shutdown of the power supply module, which is not limited in the present application.

[0156] The first rotation speed modulation signal is a rotation speed modulation signal for modulating the rotation speed of the power supply fan to reach a preset rotation speed. Preferably, the first rotation speed modulation signal can modulate the rotation speed of the power supply fan to reach 50% of full load operation.

[0157] The third rotation speed modulation signal is a rotation speed modulation signal for modulating the rotation speed of the power supply fan to stop rotating. When the power supply fan receives the third rotation speed modulation signal, the power supply fan stops rotating.

[0158] In some embodiments, a pulse width modulation signal is used to drive the power supply fan to reach a corresponding rotation speed. In this case, the duty cycle of the first rotation speed modulation signal is 50% of the full load duty cycle of the power supply fan, and the duty cycle of the third rotation speed modulation signal is 0% of the full load duty cycle of the power supply fan.

[0159] The temperature threshold is a set temperature value indicating that the ambient temperature of the power supply internal device is normal. It is usually set through experiments or experience. Preferably, the temperature threshold is 85 degrees Celsius.

[0160] Taking the case of full load 3600W operation of the power supply as an example. When the controller samples the input voltage and detects an abnormal power failure, and the power supply is in a non-redundant single power supply state, after the input power supply is powered off, the main output module cannot continuously supply the load of the subsequent system and is closed first, and then the auxiliary output module is closed. The output of the auxiliary output module is only used to supply power to the power supply itself, so the 12V voltage maintenance time is longer than that of the main output module. In the full load condition of the power supply, the main output module can maintain 12V for about 10ms, that is, 12V can provide 3600W power supply to the subsequent system load for 10ms. After 10ms, the power supply large capacitor energy cannot continue to supply 3600W power to the subsequent system load due to the input power failure, and accordingly, the 12V voltage of the redundant isolation unit also powers off. The 12V voltage provided by the auxiliary output module of the power supply has a power of only 10W, which can only be used to supply power to the microcontroller and other devices inside the power supply. The total power required by the microcontroller and other devices is only 3W at most, so there is still 7W power that can be used to supply power to the power supply fan. Therefore, the large capacitor energy of the power supply can maintain 12V voltage for a period of time, and the 12V voltage maintenance time is relatively long, about several seconds, so the microcontroller supply also exists, and the sampling and monitoring function of the microcontroller is normal.

[0161] The power supply fan needs about 40W when it is running at full speed, and only 6.5W when it is running at half speed. Therefore, when the power supply detects the input power-off moment, the microcontroller immediately sends a first speed modulation signal to the power supply fan to adjust the running state of the power supply fan to half speed. The reason for sending the first speed modulation signal to the power supply fan immediately after detecting the input power-off moment is that for a high-speed power supply fan, it takes a certain time to adjust the power supply fan from full speed to half speed. The longer the power supply fan runs at a speed higher than full speed, the more power it consumes, which may exceed the 7W of additional power that the auxiliary output module can provide, causing the output power of the auxiliary output module to be pulled up, exceeding the power protection mechanism of the power supply, resulting in power supply downtime protection. In the case of downtime protection, the power supply of the microcontroller will be abnormal and cannot continue to obtain monitoring information of the signal.

[0162] When the power supply detects the input power-off moment, the microcontroller immediately sends a first speed modulation signal to the power supply fan. At the same time, the microcontroller sends a command to shut down the output of the redundant isolation unit at the 10ms 12V holding time, so that the channel of the power supply output is closed. In this way, the energy of the secondary side output filter capacitor of the power supply can be prevented from being continuously drawn by the body diode of the MOSFET in the redundant isolation unit. Therefore, at the 10ms moment of the power-off command, the microcontroller sends a command to shut down the redundant isolation unit, and the channel of the power supply output is closed, so that the energy of the secondary side output filter capacitor cannot be drawn by the external system load, and the energy of the secondary side output filter capacitor can continue to provide 12V to the power supply fan to continue to supply power, so that the power supply fan can run for a period of time at 12V voltage.

[0163] When the microcontroller detects that the voltage of the primary capacitor module is lower than 10.8V and the speed of the power supply fan has been reduced to half speed, the microcontroller sends a high level to the first electrode of the first transistor T1 to open the first transistor T1, thereby opening the first branch. At this time, the auxiliary output module supplies power to the power supply fan. The half speed of the power supply fan is maintained for a period of time. Tests show that the maintenance time can reach 4.3s, and the 4.3s of further maintenance time continues to dissipate heat for the power supply shutdown. When the microcontroller samples that all five hot spots are below the standard threshold (85 degrees Celsius), the microcontroller sends a low level to the first electrode of the first transistor to shut down the first branch and cut off the power supply of the auxiliary output module to the power supply fan; or a zero speed modulation signal can be sent to the power supply fan to stop the power supply fan from rotating to reduce power consumption. When the next input is normal, the five hot spots inside the power supply are within the normal range, and the power supply can also be normally started, without triggering the power supply over-temperature protection or alarm, and the internal devices of the power supply are started at a normal temperature, without causing the problem of high-temperature start-up failure of the devices.

[0164] The power supply fan driving method further comprises:

[0165] B100: in response to receiving a power-on instruction, controlling the first branch to be conductive, and sending a first rotating speed modulation signal to the power fan;

[0166] B200: acquiring the temperature of the temperature sensor in the power supply, and adjusting the rotating speed of the power fan according to the temperature of the temperature sensor.

[0167] Further, the temperature sensor is arranged at least in the interior of the power supply and the air inlet of the power fan to monitor the interior temperature of the power supply and the air inlet temperature, B200: acquiring the temperature of the temperature sensor in the power supply, and adjusting the rotating speed of the power fan according to the temperature of the temperature sensor, as shown in Figure 12 , comprising:

[0168] B210a: in response to the interior temperature of the power supply being lower than the over-temperature protection temperature, shielding the over-temperature protection power supply of the power supply, and starting the main branch output module;

[0169] B220a: turning off the first branch, and controlling the second rotating speed modulation signal to be sent to the power fan;

[0170] B230a: in response to the air inlet temperature being reduced to below the over-temperature protection temperature, starting the over-temperature protection power supply of the power supply;

[0171] B240a: continuously acquiring the temperature of the temperature sensor, and adjusting the rotating speed of the power fan according to the temperature of the temperature sensor.

[0172] Further, B200: acquiring the temperature of the temperature sensor in the power supply, and adjusting the rotating speed of the power fan according to the temperature of the temperature sensor, as shown in Figure 13 , further comprising:

[0173] B210b: in response to the temperature of any temperature sensor being greater than the first risk temperature, controlling the first branch to be conductive, and sending the first rotating speed modulation signal to the power fan;

[0174] B220b: in response to the temperature of any temperature sensor being reduced to below the first risk temperature, shielding the over-temperature protection of the power supply, starting the main branch output module, and turning off the output control unit in the main branch output module;

[0175] B230b: turning off the first branch, and sending the second rotating speed modulation signal to the power fan;

[0176] B240b: in response to the temperature of any temperature sensor being reduced to below the second risk temperature, starting the output control unit;

[0177] B250b: continuously acquiring the temperature of the temperature sensor, and adjusting the rotating speed of the power fan according to the temperature of the temperature sensor.

[0178] wherein the first risk temperature is greater than the second risk temperature.

[0179] The second speed modulation signal refers to a speed modulation signal for controlling the speed of the power supply fan to reach full speed.

[0180] The first risk temperature refers to the internal device thermal stress startup risk temperature of the power supply, which is preferably set to 125 degrees Celsius.

[0181] The device thermal stress startup risk temperature describes the mechanical stress or thermal stress on internal components caused by rapid temperature changes during the startup or power-on moment of an electronic device, as well as the potential failure or damage risk that may be triggered by this temperature.

[0182] The second risk temperature is the over-temperature warning temperature, which is preferably set to 100 degrees Celsius.

[0183] In addition, a shutdown protection temperature is also set, which is usually set to 110 degrees Celsius.

[0184] Further, the power supply fan driving method as shown in Figure 14 also includes:

[0185] C210: in response to the power supply implementing over-temperature protection, obtaining the output bus voltage;

[0186] C220: adjusting the speed of the power supply fan according to the voltage of the output bus;

[0187] C230: in response to any temperature sensor temperature decreasing to below the second risk temperature, restarting the power supply and adjusting the speed of the power supply fan according to the temperature of the temperature sensor.

[0188] Further, C220: adjusting the speed of the power supply fan according to the voltage of the output bus, includes:

[0189] C220a: in response to the output bus voltage being normal, sending a second speed modulation signal to the power supply fan;

[0190] C220b: in response to the output bus voltage being abnormal, sending a second speed modulation signal to the power supply fan and shutting down the output control unit in the main branch output module;

[0191] C230b: in response to the voltage of the primary capacitor module decreasing to below the preset voltage, starting the first branch and sending a first speed modulation signal to the power supply fan.

[0192] For the high temperature of power supply, full load working condition, if the power supply is turned on quickly after shutdown, the timing of the power supply is as follows: the auxiliary road output module is powered on to output 12V voltage, and the microcontroller, active electronic components inside the power supply are powered. The microcontroller obtains the temperature of each monitoring point inside the power supply monitored by the temperature sensor, and opens the main road output module under the condition that there is no difference in each circuit part; when the output voltage of the output bus is less than the voltage of the rear stage of the redundant isolation unit, the redundant isolation unit is opened, and the output bus is powered by the output bus. Therefore, for the problem of excessive heat of the power supply, the temperature of the heat radiation power supply is too high, the power supply cannot be started, and the device has a failure risk. The following methods can be used to solve the problem:

[0193] The microcontroller sends a high level to the first transistor, so that the first transistor is turned on, and the auxiliary road output module provides 12V voltage to the power supply fan through the first branch. At the same time, the microcontroller sends the first rotating speed modulation signal to the power supply fan, so that the power consumption of the power supply fan does not exceed 7W (usually about 6.5W), so that the total power consumption of the auxiliary road output module does not exceed 10W, which will not cause the over power protection of the power supply. When starting, the auxiliary road output module provides 12V power supply to the power supply fan to cool the power supply inside. Further, according to the temperature of each temperature detection point sampled by the temperature sensor inside the power supply during startup, the hierarchical processing strategy is as follows:

[0194] Usually, the temperature detection points are set at the following five places: the power supply fan air inlet, the synchronous rectification unit, the redundant isolation unit, the power factor correction unit and the voltage conversion unit.

[0195] The power supply fan air inlet is the position of the power supply fan. According to the different installation positions of the power supply fan, it is divided into air inlet or air outlet. The position of the temperature detection point will affect the coefficient of the temperature sensor temperature rise for evaluating the temperature of the air inlet; but the principle of calculation is not affected. This application does not limit the air inlet or air outlet of the temperature detection point.

[0196] There are a large number of power devices in the synchronous rectification unit, the redundant isolation unit, the power factor correction unit and the voltage conversion unit. The thermal effect of large current can cause the temperature of the power devices in the above units to rise rapidly. Therefore, it is necessary to monitor the temperature of the above units.

[0197] The power supply controller samples five hot spot temperatures of the power supply. When the inlet temperature is high and the other four hot spot temperatures are normal, it is assumed that the internal temperature of the power supply is normal. The power supply may have a heat aggregation condition at the inlet. At this time, the temperature over-temperature alarm and protection point of the inlet set in the shielded power supply control unit is opened, and the main output module is normally started. After the main output module is started, the power supply fan is powered by the second branch, the third branch and the fourth branch. The controller sends a low level to the first electrode of the first transistor to close the first branch and disconnect the auxiliary output module from the power supply fan. Further, the controller controls the power supply fan to full speed to remove the heat of the inlet and reduce the temperature of the inlet. Since the other four internal hot spots of the power supply are not high, the device is not at risk of damage even if the power supply is started. After the inlet temperature is reduced to normal, the temperature over-temperature alarm and protection point of the inlet set in the power supply controller is opened to avoid abnormal inlet temperature of the power supply during subsequent operation. Then, the power supply fan is cancelled to full speed, and the power supply controller automatically adjusts the speed of the power supply fan according to the temperature and power to reduce the power loss and noise of the power supply fan.

[0198] The power supply controller samples five hot spot temperatures of the power supply. When the five hot spot temperatures are all high, the controller delays starting. At this time, the power supply fan is driven by the first branch to half speed for a period of time until the five hot spots are reduced to a temperature below which the device is at risk of damage. The power supply controller temporarily shields the over-temperature alarm protection point of the hot spot and opens the main output module. However, the controller needs to shut down the output control unit of the power supply to avoid the 12V voltage output by the main output module to the load, which accelerates the heating of the power supply. The main output module of the power supply has low loss and less heat under no load, and will not cause the five hot spot temperatures of the power supply to rise. When the temperature is reduced to below the first risk temperature, the controller sends a low level to the first electrode of the first transistor to close the first branch and disconnect the auxiliary output module from the power supply fan. Further, the controller controls the power supply fan to full speed to reduce the heat of the five hot spots of the power supply, and when the temperature is reduced to below the over-temperature alarm point, the output control unit of the power supply is opened, the main output module can output 12V voltage to normally drive the system load. Then, the power supply fan is cancelled to full speed, and the power supply controller automatically adjusts the speed of the power supply fan according to the temperature and power to reduce the power loss and noise of the power supply fan.

[0199] In addition, in the case of power supply over-temperature protection shutdown caused by abnormally high temperature, the controller collects the power supply over-temperature protection, and first judges whether the bus output voltage is normal. If it is normal, the second speed modulation signal is immediately sent to the power supply fan, the power supply fan is full speed to make the hot spot temperature drop, and the power supply is restarted after the hot spot temperature drops to the recovery point. If the bus voltage is abnormal, the controller controls the output control unit to be turned off, and the power supply is cut off. At the same time, the power supply fan is cut off by the power supply of the auxiliary capacitor unit, and the second speed modulation signal is sent to the power supply fan. The power supply fan is full speed to make the hot spot temperature drop, and the power supply is restarted after the hot spot temperature drops to the recovery point. When the voltage of the auxiliary capacitor unit is reduced to 10.8V, the remaining energy of the auxiliary energy storage filter capacitor is insufficient, and the first branch is immediately started, and the first speed modulation signal is sent to the power supply fan. After the hot spot temperature drops to the recovery point, the power supply is restarted.

[0200] In the case of normal operation of the power supply, taking the full load condition as an example, the controller sends a low level to the first electrode of the first transistor to turn off the first branch and cut off the power supply of the auxiliary output module to the power supply fan. At the same time, the output control unit is turned on to make the power supply normally supply power to the load. At this time, the power supply fan has three redundant power supplies of the second branch, the third branch and the fourth branch. At the same time, due to the protection of the fuse, even if an abnormal short circuit occurs in the power supply fan, the connection branch between the output bus and the power supply fan is cut off through the melting of the fuse, which can ensure the normal output of the power supply output bus and maintain the normal operation of the power supply. The controller detects the power of the power supply and the five hot spot temperatures of the power supply to implement closed-loop speed regulation of the power supply fan, which can ensure the stability and flexibility of the heat dissipation of the power supply, and also reduces the overall power loss and noise of the power supply fan.

[0201] In the case of input voltage abnormality detected by the controller, the controller samples the voltage abnormality of the redundant isolation unit and the normal output bus voltage. The controller sends a low level to the first electrode of the first transistor to turn off the first branch and cut off the power supply of the auxiliary output module to the power supply fan. The power supply fan is supplied with power by the normal bus voltage to ensure the stability of the power supply of the power supply fan. At the same time, the controller sends a second speed modulation signal to the power supply fan to keep the power supply fan full speed. The controller also detects the five hot spot temperatures of the power supply in real time, and adjusts the speed of the power supply fan according to the monitored hot spot temperature.

[0202] Specifically, the speed of the power supply fan is adjusted according to the temperature of the temperature sensor, including:

[0203] The rotation speed of the power fan is determined according to FS = BS + OL + OT, wherein FS is the actual rotation speed of the power fan, BS is the basic rotation speed of the power fan, which is usually set to 5500 revolutions per minute, OL is the load bias to the rotation speed of the power fan, and OT is the temperature bias to the rotation speed of the power fan.

[0204] Specifically, the load bias to the rotation speed of the power fan is represented by the following formula:

[0205] OL = Kiout * (Iout – Iload * 50%);

[0206] wherein OL is the load bias to the rotation speed of the power fan, Kiout is a current bias coefficient representing the relationship between the load bias to the rotation speed of the power fan and the current, Iout is the output current, and Iload is the load current.

[0207] Specifically, the temperature bias to the rotation speed of the power fan is represented by the following formula:

[0208] OT = Kt * ΔT;

[0209] wherein OT is the temperature bias to the rotation speed, Kt is a temperature bias coefficient representing the relationship between the temperature bias to the rotation speed of the power fan and the temperature rise, and ΔT is the temperature rise, which is determined by the formula:

[0210] ΔT = MAX( ΔT(inlet), ΔT(SR), ΔT(Oring), ΔT(PFC), ΔT(DCDC) );

[0211] The temperature rise ΔT is the maximum value among ΔT(inlet), ΔT(SR), ΔT(Oring), ΔT(PFC) and ΔT(DCDC). Wherein ΔT(inlet) represents the temperature rise of the temperature sensor at the air inlet, which is determined by ΔT(inlet) = Tinlet - 35, wherein Tinlet represents the temperature of the temperature sensor at the air inlet.

[0212] ΔT(SR) represents the temperature rise of the temperature sensor at the synchronous rectification unit, which is determined by ΔT(SR) = TSR - 85, wherein TSR represents the temperature of the temperature sensor at the synchronous rectification unit.

[0213] ΔT(Oring) represents the temperature rise of the temperature sensor at the redundant isolation unit, which is determined by ΔT(Oring) = TOring - 75, wherein TOring represents the temperature of the temperature sensor at the redundant isolation unit.

[0214] ΔT(PFC) represents the temperature sensor temperature rise at the power factor correction unit, determined by: ΔT(PFC) = TPFC - 75, where TPFC represents the temperature sensor temperature at the power factor correction unit.

[0215] ΔT(DCDC) represents the temperature sensor temperature rise at the main path voltage conversion unit, determined by: ΔT(DCDC) = TDCDC - 75, where TDCDC represents the temperature sensor temperature at the main path voltage conversion unit.

[0216] Table 1 Switching test results

[0217]

[0218] By the above formula, the power supply fan speed is adjusted in real time from the power supply load and temperature, which can avoid the abnormal temperature of the power supply.

[0219] After implementing the power supply fan driving method, the switching test results of the power supply are good. As shown in Table 1.

[0220] The complete logic diagram of the power supply fan driving method is summarized in Figure 15 .

[0221] It should be understood that, although Figure 7 the steps in the flowchart are shown in order according to the arrows, these steps are not necessarily executed in order according to the arrows. Unless otherwise specified herein, the execution of these steps is not strictly limited in order, and these steps can be executed in other orders. Moreover, Figure 7 at least part of the steps in may include multiple sub-steps or multiple stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution order of these sub-steps or stages is not necessarily sequential, but can be alternately executed with other steps or sub-steps or stages of other steps.

[0222] By implementing the power supply fan driving method provided by the embodiments of the present application, the power supply fan can be maintained by the auxiliary path output module after the power supply is turned off, the internal excess heat of the power supply is taken away by adjusting the speed of the power supply fan, and the normal function of the power supply and the safe work of the internal electronic components of the power supply are ensured. In different power supply working condition scenes, the controller can flexibly adjust the speed of the power supply fan according to the sensor temperature and the load state, so that the power supply is well cooled.

[0223] In other embodiments, as Figure 16As shown, any power supply in the power supply system includes the drive circuit as described above, the controller in the drive circuit is configured to execute the power fan drive method as described above, including:

[0224] A100: Obtain the power supply state of the drive circuit, the power supply state at least includes power supply interruption;

[0225] A200: In response to the power supply interruption of the drive circuit and the independent power supply of the load by the power supply, a first rotating speed modulation signal is sent to the power fan driven by the drive circuit;

[0226] A300: Turn off the redundant isolation unit in the power supply main circuit output module in the drive circuit;

[0227] A400: Monitor the voltage of the secondary capacitor unit in the drive circuit and the power fan rotating speed of the power fan, and according to the voltage of the secondary capacitor unit and the power fan rotating speed, control the first branch to be conductive and supply power to the power fan.

[0228] According to the voltage of the secondary capacitor unit 430 and the power fan rotating speed, after controlling the first branch to be conductive and supplying power to the power fan, it further includes:

[0229] A500: Obtain the temperature of the temperature sensor in the power supply, and according to the temperature of the temperature sensor, turn off the power fan.

[0230] According to the temperature of the temperature sensor, turn off the power fan, including:

[0231] In response to the temperature of any temperature sensor being reduced to below the temperature threshold, A510a: control the first branch to be disconnected, and cut off the power supply of the first branch to the power fan;

[0232] Or A510b: send a third rotating speed modulation signal to the power fan to control the power fan to stop rotating.

[0233] The power fan drive method further includes:

[0234] B100: In response to receiving a power-on instruction, control the first branch to be conductive, and send a first rotating speed modulation signal to the power fan;

[0235] B200: Obtain the temperature of the temperature sensor in the power supply, and according to the temperature of the temperature sensor, adjust the rotating speed of the power fan.

[0236] Further, the temperature sensor is at least arranged in the internal temperature of the power supply and the air inlet temperature of the power fan, to monitor the internal temperature of the power supply and the air inlet temperature, B200: Obtain the temperature of the temperature sensor in the power supply, and according to the temperature of the temperature sensor, adjust the rotating speed of the power fan, including:

[0237] B210a: in response to the temperature inside the power supply being lower than the over-temperature protection temperature, shielding the over-temperature protection power supply of the power supply, and starting the main path output module;

[0238] B220a: turning off the first branch, and controlling the second rotating speed modulation signal to be sent to the power supply fan;

[0239] B230a: in response to the air outlet temperature being lower than the over-temperature protection temperature, starting the over-temperature protection power supply of the power supply;

[0240] B240a: continuously acquiring the temperature of the temperature sensor, and adjusting the rotating speed of the power supply fan according to the temperature of the temperature sensor.

[0241] Further, B200: acquiring the temperature of the temperature sensor in the power supply, and adjusting the rotating speed of the power supply fan according to the temperature of the temperature sensor, further comprising:

[0242] B210b: in response to the temperature of any temperature sensor being greater than the first risk temperature, controlling the first branch to be turned on, and sending the first rotating speed modulation signal to the power supply fan;

[0243] B220b: in response to the temperature of any temperature sensor being lower than the first risk temperature, shielding the over-temperature protection of the power supply, starting the main path output module, and turning off the output control unit in the main path output module;

[0244] B230b: turning off the first branch, and sending the second rotating speed modulation signal to the power supply fan;

[0245] B240b: in response to the temperature of any temperature sensor being lower than the second risk temperature, starting the output control unit;

[0246] B250b: continuously acquiring the temperature of the temperature sensor, and adjusting the rotating speed of the power supply fan according to the temperature of the temperature sensor;

[0247] Wherein, the first risk temperature is greater than the second risk temperature.

[0248] Further, the power supply fan driving method further comprises:

[0249] C210: in response to the power supply implementing over-temperature protection, acquiring the output bus voltage;

[0250] C220: adjusting the rotating speed of the power supply fan according to the voltage of the output bus;

[0251] C230: in response to the temperature of any temperature sensor being lower than the second risk temperature, restarting the power supply, and adjusting the rotating speed of the power supply fan according to the temperature of the temperature sensor.

[0252] Further, C220: adjusting the rotation speed of the power fan according to the voltage of the output bus, comprising:

[0253] C220a: in response to the output bus voltage being normal, sending a second rotation speed modulation signal to the power fan;

[0254] C220b: in response to the output bus voltage being abnormal, sending a second rotation speed modulation signal to the power fan, and shutting down the output control unit in the main branch output module;

[0255] C230b: in response to the voltage of the primary capacitor module decreasing to below a preset voltage, starting the first branch, and sending a first rotation speed modulation signal to the power fan.

[0256] Specifically, adjusting the rotation speed of the power fan according to the temperature of the temperature sensor, comprising:

[0257] According to: FS=BS+OL+OT, the rotation speed of the power fan is determined, wherein FS is the actual rotation speed of the power fan, BS is the basic rotation speed of the power fan, which is usually set to 5500 revolutions per minute, OL is the load bias of the power fan rotation speed, and OT is the temperature bias of the power fan rotation speed.

[0258] Implementing the power supply system provided by the embodiments of the present application can maintain power supply to the power fan through the auxiliary road output module after the power supply is shut down, adjust the rotation speed of the power fan to take away the internal heat of the power supply, and ensure the normal function of the power supply and the safe operation of the internal electronic components of the power supply.

[0259] In other embodiments, a computer readable storage medium has a power fan driver stored thereon, and the power fan driver, when executed by a controller, implements the power fan driving method described above, comprising:

[0260] A100: obtaining the power supply state of the driving circuit, the power supply state at least including power supply interruption;

[0261] A200: in response to the driving circuit having power supply interruption and the power supply independently supplying power to the load, sending a first rotation speed modulation signal to the power fan driven by the driving circuit;

[0262] A300: shutting down the redundant isolation unit in the power supply main road output module in the driving circuit;

[0263] A400: monitoring the voltage of the secondary capacitor unit in the driving circuit and the power fan rotation speed of the power fan, and controlling the first branch to be conductive to supply power to the power fan according to the voltage of the secondary capacitor unit and the power fan rotation speed.

[0264] According to the voltage of the secondary capacitor unit and the rotation speed of the power fan, the first branch is controlled to be turned on to supply power to the power fan, and further comprising:

[0265] A500: acquiring the temperature of the temperature sensor in the power supply, and according to the temperature of the temperature sensor, the power fan is turned off.

[0266] According to the temperature of the temperature sensor, the power fan is turned off, comprising:

[0267] In response to the temperature of any temperature sensor being reduced below the temperature threshold, A510a: the first branch is controlled to be turned off to cut off the power supply of the first branch to the power fan;

[0268] Or A510b: a third rotation speed modulation signal is sent to the power fan to control the power fan to stop rotating.

[0269] The power fan driving method further comprises:

[0270] B100: in response to receiving a power-on instruction, the first branch is controlled to be turned on, and a first rotation speed modulation signal is sent to the power fan;

[0271] B200: acquiring the temperature of the temperature sensor in the power supply, and adjusting the rotation speed of the power fan according to the temperature of the temperature sensor.

[0272] Further, the temperature sensor is arranged at least in the interior of the power supply and the air inlet of the power fan to monitor the interior temperature of the power supply and the air inlet temperature, B200: acquiring the temperature of the temperature sensor in the power supply, and adjusting the rotation speed of the power fan according to the temperature of the temperature sensor, comprising:

[0273] B210a: in response to the temperature in the interior of the power supply being lower than the over-temperature protection temperature, the over-temperature protection power supply of the power supply is shielded, and the main branch output module is turned on;

[0274] B220a: the first branch is turned off, and a second rotation speed modulation signal is sent to the power fan;

[0275] B230a: in response to the air inlet temperature being reduced below the over-temperature protection temperature, the over-temperature protection power supply of the power supply is turned on;

[0276] B240a: continuously acquiring the temperature of the temperature sensor, and adjusting the rotation speed of the power fan according to the temperature of the temperature sensor.

[0277] Further, B200: acquiring the temperature of the temperature sensor in the power supply, and adjusting the rotation speed of the power fan according to the temperature of the temperature sensor, further comprising:

[0278] B210b: in response to the temperature of any temperature sensor being greater than the first risk temperature, controlling the first branch to be on, and sending a first rotating speed modulation signal to the power supply fan;

[0279] B220b: in response to the temperature of any temperature sensor being reduced to below the first risk temperature, shielding the over-temperature protection of the power supply, starting the main branch output module, and shutting down the output control unit in the main branch output module;

[0280] B230b: shutting down the first branch, and sending a second rotating speed modulation signal to the power supply fan;

[0281] B240b: in response to the temperature of any temperature sensor being reduced to below the second risk temperature, starting the output control unit;

[0282] B250b: continuously acquiring the temperature of the temperature sensor, and adjusting the rotating speed of the power supply fan according to the temperature of the temperature sensor;

[0283] wherein the first risk temperature is greater than the second risk temperature.

[0284] Further, the power supply fan driving method further comprises:

[0285] C210: in response to the power supply implementing over-temperature protection, acquiring the output bus voltage;

[0286] C220: adjusting the rotating speed of the power supply fan according to the voltage of the output bus;

[0287] C230: in response to the temperature of any temperature sensor being reduced to below the second risk temperature, restarting the power supply, and adjusting the rotating speed of the power supply fan according to the temperature of the temperature sensor.

[0288] Further, C220: adjusting the rotating speed of the power supply fan according to the voltage of the output bus, comprises:

[0289] C220a: in response to the output bus voltage being normal, sending a second rotating speed modulation signal to the power supply fan;

[0290] C220b: in response to the output bus voltage being abnormal, sending a second rotating speed modulation signal to the power supply fan, and shutting down the output control unit in the main branch output module;

[0291] C230b: in response to the voltage of the primary side capacitor module being reduced to below a preset voltage, starting the first branch, and sending a first rotating speed modulation signal to the power supply fan.

[0292] Specifically, adjusting the rotating speed of the power supply fan according to the temperature of the temperature sensor, comprises:

[0293] According to FS=BS+OL+OT, the rotation speed of the power fan is determined, wherein FS is the actual rotation speed of the power fan, BS is the basic rotation speed of the power fan, which is usually set to 5500 revolutions per minute, OL is the load bias of the rotation speed of the power fan, and OT is the temperature bias of the rotation speed of the power fan.

[0294] The computer readable storage medium provided by the embodiment of the application can maintain power supply to the power fan through the auxiliary road output module after the power supply is shut down, remove the residual heat inside the power supply by adjusting the rotation speed of the power fan, and ensure the normal power-on function of the power supply and the safe operation of the electronic components inside the power supply.

[0295] In some other embodiments, a computer program product includes a computer program, and the computer program, when executed by a controller, implements the power fan driving method described above, including:

[0296] A100: obtaining a power supply state of a driving circuit, the power supply state at least including a power supply interruption;

[0297] A200: in response to the power supply interruption of the driving circuit and the independent power supply of the load by the power supply, a first rotation speed modulation signal is sent to the power fan driven by the driving circuit;

[0298] A300: turning off the redundant isolation unit in the power supply main road output module in the driving circuit;

[0299] A400: monitoring the voltage of the auxiliary capacitor unit in the driving circuit and the rotation speed of the power fan of the power fan, and controlling the first branch to be conductive to supply power to the power fan according to the voltage of the auxiliary capacitor unit and the rotation speed of the power fan.

[0300] According to the voltage of the auxiliary capacitor unit and the rotation speed of the power fan, after the first branch is controlled to be conductive to supply power to the power fan, it further includes:

[0301] A500: obtaining the temperature of the temperature sensor in the power supply, and closing the power fan according to the temperature of the temperature sensor.

[0302] According to the temperature of the temperature sensor, the power fan is closed, including:

[0303] In response to the temperature of any temperature sensor being reduced to below the temperature threshold, A510a: the first branch is controlled to be disconnected to cut off the power supply of the first branch to the power fan;

[0304] Or A510b: a third rotation speed modulation signal is sent to the power fan to control the power fan to stop rotating.

[0305] The power fan driving method further includes:

[0306] B100: in response to receiving a power-on instruction, controlling the first branch to be conductive, and sending a first rotating speed modulation signal to the power fan;

[0307] B200: acquiring the temperature of the temperature sensor in the power supply, and adjusting the rotating speed of the power fan according to the temperature of the temperature sensor.

[0308] Further, the temperature sensor is arranged at least in the interior of the power supply and the air inlet of the power fan to monitor the interior temperature of the power supply and the air inlet temperature, B200: acquiring the temperature of the temperature sensor in the power supply, and adjusting the rotating speed of the power fan according to the temperature of the temperature sensor, comprising:

[0309] B210a: in response to the interior temperature of the power supply being lower than the over-temperature protection temperature, shielding the over-temperature protection power supply of the power supply, and starting the main branch output module;

[0310] B220a: turning off the first branch, and controlling the second rotating speed modulation signal to be sent to the power fan;

[0311] B230a: in response to the air inlet temperature being lower than the over-temperature protection temperature, starting the over-temperature protection power supply of the power supply;

[0312] B240a: continuously acquiring the temperature of the temperature sensor, and adjusting the rotating speed of the power fan according to the temperature of the temperature sensor.

[0313] Further, B200: acquiring the temperature of the temperature sensor in the power supply, and adjusting the rotating speed of the power fan according to the temperature of the temperature sensor, further comprising:

[0314] B210b: in response to the temperature of any temperature sensor being greater than the first risk temperature, controlling the first branch to be conductive, and sending the first rotating speed modulation signal to the power fan;

[0315] B220b: in response to the temperature of any temperature sensor being lower than the first risk temperature, shielding the over-temperature protection of the power supply, starting the main branch output module, and turning off the output control unit in the main branch output module;

[0316] B230b: turning off the first branch, and sending the second rotating speed modulation signal to the power fan;

[0317] B240b: in response to the temperature of any temperature sensor being lower than the second risk temperature, starting the output control unit;

[0318] B250b: continuously acquiring the temperature of the temperature sensor, and adjusting the rotating speed of the power fan according to the temperature of the temperature sensor;

[0319] Wherein, the first risk temperature is greater than the second risk temperature.

[0320] Further, the power supply fan driving method further comprises:

[0321] C210: in response to the power supply implementing the over-temperature protection, obtaining an output bus voltage;

[0322] C220: adjusting the rotation speed of the power supply fan according to the voltage of the output bus;

[0323] C230: in response to any temperature sensor temperature decreasing to below the second risk temperature, restarting the power supply and adjusting the rotation speed of the power supply fan according to the temperature of the temperature sensor.

[0324] Further, C220: adjusting the rotation speed of the power supply fan according to the voltage of the output bus, comprises:

[0325] C220a: in response to the output bus voltage being normal, sending a second rotation speed modulation signal to the power supply fan;

[0326] C220b: in response to the output bus voltage being abnormal, sending a second rotation speed modulation signal to the power supply fan and shutting down the output control unit in the main branch output module;

[0327] C230b: in response to the voltage of the primary capacitor module decreasing to below the preset voltage, starting the first branch and sending a first rotation speed modulation signal to the power supply fan.

[0328] Specifically, adjusting the rotation speed of the power supply fan according to the temperature of the temperature sensor, comprises:

[0329] According to: FS=BS+OL+OT, the rotation speed of the power supply fan is determined, wherein FS is the actual rotation speed of the power supply fan, BS is the basic rotation speed of the power supply fan, which is usually set to 5500 revolutions per minute, OL is the load bias on the rotation speed of the power supply fan, and OT is the temperature bias on the rotation speed of the power supply fan.

[0330] Implementing the computer program product provided in the embodiment of the application can maintain power supply to the power supply fan through the auxiliary road output module after the power supply is shut down, remove the internal residual heat of the power supply by adjusting the rotation speed of the power supply fan, and ensure the normal function of the power supply and the safe work of the internal electronic components of the power supply.

[0331] The technical scheme provided in the embodiment of the application has the beneficial effects that: by implementing the driving circuit, the power supply fan driving method and the power supply system provided in the embodiment of the application, power supply to the power supply fan can be maintained through the auxiliary road output module after the power supply is shut down, the internal residual heat of the power supply can be removed by adjusting the rotation speed of the power supply fan, and the normal function of the power supply and the safe work of the internal electronic components of the power supply can be ensured. In different power supply working condition scenes, the controller can flexibly adjust the rotation speed of the power supply fan according to the sensor temperature and the load state, so that the power supply is well cooled.

[0332] Those skilled in the art will further appreciate that the units and algorithms described in connection with the examples disclosed herein can be embodied directly in hardware, in software, or in a combination of the two. For the sake of brevity, descriptions of a method of execution of the examples will not be repeated here. To the extent that the steps of the examples are described herein as being performed by a particular unit, it will be appreciated that such steps can be performed by that unit in hardware, or by that unit in software, or by a combination of the two. The steps of the examples will be described in general terms, and the particular unit that performs the steps will be clear to the skilled person. The steps of the examples will be performed by the unit that is most appropriate to perform the steps, and the choice of unit will depend on the design constraints and the particular application of the solution. The skilled person will be able to select the appropriate unit to perform the steps of the examples, and the selection of the unit will not be considered to place the solution outside the scope of the application.

[0333] In particular, according to embodiments of the application, the processes described above with reference to the flowcharts can be implemented as steps controlled by a computer software program. For example, embodiments of the application include a computer program product comprising a computer program loaded on a computer readable medium, the computer program comprising program code for executing the methods illustrated by the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network by a communication device, or installed from a memory, or installed from a ROM. When the computer program is executed by an external processor, the above-mentioned functions defined in the methods of embodiments of the application are performed.

[0334] It should be noted that the computer readable medium in the embodiments of the present application can be a computer readable signal medium or a computer readable storage medium or any combination of the two. The computer readable storage medium may, for example, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or apparatus, or any combination of the above. More specific examples of the computer readable storage medium can include, but are not limited to, an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the embodiments of the present application, the computer readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, device or apparatus. In the embodiments of the present application, the computer readable signal medium can include a data signal carried in a baseband or as a part of a carrier wave, which carries computer readable program code. Such a propagated data signal can take many forms, including but not limited to an electromagnetic signal, an optical signal or any suitable combination of the above. The computer readable signal medium can also be any computer readable medium other than the computer readable storage medium, which can send, propagate or transmit a program for use by or in conjunction with an instruction execution system, device or apparatus. The program code contained in the computer readable medium can be transmitted by any suitable medium, including but not limited to a wire, an optical fiber, an RF (Radio Frequency, RF) or the like, or any suitable combination of the above.

[0335] The computer readable medium described above can be contained in the server described above; or can exist separately and not be assembled into the server. The computer readable medium described above carries one or more programs, when the one or more programs are executed by the server, the server: in response to detecting that the peripheral mode of the terminal is not activated, acquires the frame rate of the application on the terminal; when the frame rate meets the off-screen condition, judges whether the user is acquiring the screen information of the terminal; in response to the judgment result that the user is not acquiring the screen information of the terminal, controls the screen to enter the immediate dim mode.

[0336] Computer program code for carrying out operations of embodiments of the present application can be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C++ or the like, and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code can execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection can be made to an external computer (for example, through the Internet using an Internet Service Provider).

[0337] The various embodiments in the specification are described in progressive manner, and the same or similar parts between the various embodiments can be mutually referred to, and each embodiment focuses on the difference from other embodiments. In particular, for the system or system embodiments, since they are basically similar to the method embodiments, they are described more simply, and the relevant parts can be referred to the part of the method embodiments. The above described system and system embodiments are merely illustrative, and the units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, i.e., they can be located in one place, or can be distributed to multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the embodiments. Those skilled in the art can understand and implement without creative labor.

[0338] The above describes the technical solutions provided by the present application in detail, and the principles and implementation manners of the present application are described by applying specific examples. The above description of the embodiments is only applicable to help understand the method and core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation manner and application range will be changed. In summary, the content of the specification should not be understood as a limitation of the present application.

[0339] The above describes in detail a driving circuit, a power fan driving method and a power system provided by the present application. The principles and implementation manners of the present application are described by using specific examples, and the above examples are only preferred embodiments of the present application, which are used to help understand the method of the present application and its core idea, and do not limit the present application. It should be pointed out that, for ordinary skilled persons in the art, any modification, equivalent replacement, improvement and the like made without departing from the principles of the present application, which are within the spirit and principles of the present application, also fall within the protection scope of the present application.

Claims

1. A drive circuit characterized by comprising: The application relates to a driving circuit for driving a power fan (100), which comprises a power input module (200), a primary capacitor module (300), a main path output module (400), an auxiliary path output module (500) and a controller (600). The main path output module (400) comprises a secondary capacitor unit (430) and a redundant isolation unit (450). The power input module (200) is used for receiving an input voltage, and is connected with the primary capacitor module (300), the primary capacitor module (300) is further connected with the main path output module (400) and the auxiliary path output module (500), the auxiliary path output module (500) is connected with the power fan (100) through a first branch (B1), and the secondary capacitor unit (430) is connected with the power fan (100) through a second branch (B2). The controller (600) is connected with the power fan (100), sends a rotating speed modulation signal to the power fan (100), and acquires the rotating speed of the power fan (100); the controller (600) is further connected with the power input module (200) to monitor the power supply state of the driving circuit. The controller (600) is configured to send a first rotating speed modulation signal to the power fan (100) and shut down the redundant isolation unit (450) according to the power supply state. The controller (600) is further configured to monitor and control the first branch (B1) to be turned on and supply power to the power fan (100) according to the voltage of the secondary capacitor unit (430) and the rotating speed of the power fan. The power supply state is that the power supply AC input is powered off and the power supply independently supplies power to the load.

2. The drive circuit according to claim 1, characterized in that, The first branch (B1) comprises a first transistor (T1) and a first diode (D1). The first transistor (T1) has a first transistor first pole (T11), a first transistor second pole (T12) and a first transistor third pole (T13). The first transistor second pole (T12) is connected with the auxiliary path output module (500) as one end of the first branch (B1), the first transistor third pole (T13) is connected with the anode of the first diode (D1), and the cathode of the first diode (D1) is connected with the power fan (100) as the other end of the first branch (B1). The first transistor first pole (T11) is connected with the controller (600) and receives a first branch control signal transmitted by the controller (600).

3. The drive circuit according to claim 1, characterized by The second branch (B2) comprises a second diode (D2). The anode of the second diode (D2) is connected with the secondary capacitor unit (430) as one end of the second branch (B2), and the cathode of the second diode (D2) is connected with the power fan (100) as the other end of the second branch (B2).

4. The drive circuit according to claim 1, characterized by The driving circuit further comprises an output bus (700). At least one redundant power supply is connected to the output bus (700); The main path output module (400) is connected with the output bus (700); The redundant isolation unit (450) is further connected with the power supply fan (100) through a third branch (B3); The output bus (700) is connected with the power supply fan (100) through a fourth branch (B4).

5. The drive circuit according to claim 4, characterized in that, The third branch (B3) comprises a third diode (D3); The anode of the third diode (D3) is connected with the redundant isolation unit (450) as one end of the third branch (B3), and the cathode of the third diode (D3) is connected with the power supply fan (100) as the other end of the third branch (B3).

6. The drive circuit according to claim 4, characterized by The fourth branch (B4) comprises a fourth diode (D4); The anode of the fourth diode (D4) is connected with the output bus (700) as one end of the fourth branch (B4), and the cathode of the fourth diode (D4) is connected with the power supply fan (100) as the other end of the fourth branch (B4).

7. The drive circuit of claim 1, wherein The drive circuit further comprises a fuse F; The other end of the first branch (B1), the other end of the second branch (B2), the other end of the third branch (B3) and the other end of the fourth branch (B4) are connected, and are connected with the power supply fan (100) after being connected in series with the fuse F.

8. The drive circuit of claim 1, wherein, The main path output module (400) further comprises a main path voltage conversion unit (410), a synchronous rectification unit (420) and an output control unit (440); One end of the main path voltage conversion unit (410) is connected to the primary side capacitor module (300), the other end of the main path voltage conversion unit (410) is connected with one end of the synchronous rectification unit (420), the other end of the synchronous rectification unit is connected with one end of the secondary side capacitor unit (430), the other end of the secondary side capacitor unit (430) is connected with one end of the output control unit (440), the other end of the output control unit (440) is connected with one end of the redundant isolation unit (450), the other end of the redundant isolation unit (450) is connected with the output bus (700).

9. The drive circuit of claim 1, wherein, The auxiliary path output module (500) comprises an auxiliary path voltage conversion unit (510) and a secondary side output unit (520); One end of the auxiliary path voltage conversion unit (510) is connected to the primary side capacitor module (300), the other end of the auxiliary path voltage conversion unit (510) is connected with one end of the secondary side output unit (520), and the other end of the secondary side output unit (520) is connected with one end of the first branch (B1).

10. The drive circuit of claim 1, wherein, The power supply input module (200) comprises a rectification unit (210) and a power factor correction unit (220); One end of the rectifier unit (210) is used for receiving input voltage, the other end of the rectifier unit (210) is connected with one end of the power factor correction unit (220), the other end of the power factor correction unit (220) is connected to the primary side capacitor module (300).

11. A power fan drive method characterized by comprising: The method comprises: obtaining a power supply state of the drive circuit, the power supply state at least including a power supply interruption; in response to the power supply interruption of the drive circuit and the power supply independent supply to the load, sending a first rotating speed modulation signal to the power supply fan driven by the drive circuit; turning off the redundant isolation unit in the power supply main circuit output module of the drive circuit; monitoring the voltage of the secondary side capacitor unit in the drive circuit and the rotating speed of the power supply fan, and controlling the first branch to be turned on to supply power to the power supply fan according to the voltage of the secondary side capacitor unit and the rotating speed of the power supply fan.

12. The power fan drive method of claim 11, wherein, after the step of controlling the first branch to be turned on to supply power to the power supply fan according to the voltage of the secondary side capacitor unit and the rotating speed of the power supply fan, the method further comprises: obtaining the temperature of the temperature sensor in the power supply, and turning off the power supply fan according to the temperature of the temperature sensor.

13. The power fan drive method of claim 12, wherein, the step of turning off the power supply fan according to the temperature of the temperature sensor comprises: in response to the temperature of any temperature sensor being lower than a temperature threshold, controlling the first branch to be turned off to cut off the power supply of the first branch to the power supply fan; or sending a third rotating speed modulation signal to the power supply fan to control the power supply fan to stop rotating.

14. The power fan drive method of claim 11, wherein, the method further comprises: in response to receiving a power-on instruction, controlling the first branch to be turned on, and sending a first rotating speed modulation signal to the power supply fan; obtaining the temperature of the temperature sensor in the power supply, and adjusting the rotating speed of the power supply fan according to the temperature of the temperature sensor.

15. The power fan drive method of claim 14, wherein, the temperature sensor is arranged at least inside the power supply and the air inlet temperature of the power supply fan to monitor the internal temperature of the power supply and the air inlet temperature, and the step of obtaining the temperature of the temperature sensor in the power supply and adjusting the rotating speed of the power supply fan according to the temperature of the temperature sensor comprises: in response to the internal temperature of the power supply being lower than an over-temperature protection temperature, shielding the over-temperature protection power supply of the power supply, and turning on the main circuit output module; turning off the first branch, and controlling the second rotating speed modulation signal to be sent to the power supply fan; in response to the air inlet temperature being lower than the over-temperature protection temperature, turning on the over-temperature protection power supply of the power supply; continuously obtaining the temperature of the temperature sensor, and adjusting the rotating speed of the power supply fan according to the temperature of the temperature sensor.

16. The power fan drive method of claim 14, wherein, the step of obtaining the temperature of the temperature sensor in the power supply and adjusting the rotating speed of the power supply fan according to the temperature of the temperature sensor further comprises: in response to the temperature of any temperature sensor being greater than a first risk temperature, controlling the first branch to be turned on, and sending a first rotating speed modulation signal to the power supply fan; In response to the temperature of any of the temperature sensors decreasing below a first risk temperature, shielding the over-temperature protection of the power supply, starting the main path output module, and shutting down the output control unit in the main path output module; Shutting down the first branch, and sending a second rotating speed modulation signal to the power supply fan; In response to the temperature of any of the temperature sensors decreasing below a second risk temperature, starting the output control unit; Continuously acquiring the temperature of the temperature sensors, and adjusting the rotating speed of the power supply fan according to the temperature of the temperature sensors; Wherein, the first risk temperature is greater than the second risk temperature.

17. The power fan drive method of claim 11, wherein, The method further comprises: In response to the power supply implementing over-temperature protection, acquiring the output bus voltage; Adjusting the rotating speed of the power supply fan according to the voltage of the output bus; In response to any of the temperature sensors decreasing below the second risk temperature, restarting the power supply, and adjusting the rotating speed of the power supply fan according to the temperature of the temperature sensors.

18. The power fan drive method of claim 17, wherein, The adjusting the rotating speed of the power supply fan according to the voltage of the output bus comprises: In response to the output bus voltage being normal, sending a second rotating speed modulation signal to the power supply fan; In response to the output bus voltage being abnormal, sending a second rotating speed modulation signal to the power supply fan, and shutting down the output control unit in the main path output module; In response to the voltage of the primary side capacitor module decreasing below a preset voltage, starting the first branch, and sending a first rotating speed modulation signal to the power supply fan.

19. The power fan drive method according to any one of claims 15 to 17, wherein The adjusting the rotating speed of the power supply fan according to the temperature of the temperature sensors comprises: According to FS=BS+OL+OT to determine the rotating speed of the power supply fan, wherein, FS is the rotating speed of the power supply fan, BS is the basic rotating speed, OL is the load bias on the rotating speed, and OT is the temperature bias on the rotating speed.

20. A power supply system characterized by comprising: Any of the power supplies in the power supply system comprises the drive circuit according to any of claims 1-10, and the controller in the drive circuit is configured to perform the power supply fan drive method according to any of claims 11-19.

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