Server fan control system

Abstract

The utility model relates to the technical field of server testing, and discloses a server fan control system, which comprises a server mainboard, a first signal sending module, a second signal sending module, a second signal sending module, a first PWM (Pulse Width Modulation) module and a second PWM (Pulse Width Modulation) module, the fan device is connected with the server mainboard through the first signal sending module; the second signal sending module is connected with the fan device, and the second signal sending module is provided with a second PWM signal; the first signal sending module and the second signal sending module are both selectively connected with the fan device through the signal switching device, and the controller is in communication connection with the server mainboard and is electrically connected with the signal switching device. The controller receives test information sent by the server mainboard, wherein the test information comprises mainboard function test information and fan function test information. In this way, noise reduction is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of server testing, in particular to a server fan control system. Background Art

[0002] At present, most servers are equipped with fans for heat dissipation. These fans are generally installed through fan racks or fan brackets fixed inside the server chassis. These fans are usually located at the front or back of the server chassis and connected to the server's power supply through power cords. Then, during the server testing process, the server's motherboard needs to be tested for power supply, memory, CPU, graphics card, storage device, network test, etc. In addition, the fans used for heat dissipation in the server need to be tested.

[0003] That is to say, when the factory produces the server, it is usually necessary to test the motherboard and fan of the server. The test time for the fan is relatively short, only about 15 seconds, but the test of the motherboard needs to last between 3000 seconds and 5400 seconds. When the server is being tested, since the motherboard and the fan are connected to the power supply and work synchronously, the fan is actually rotating when the motherboard is tested. At this time, the fan is rotating normally and the high speed causes noise of at least 80 decibels, causing very large noise pollution and seriously affecting the personal safety of the testers. Even if there is a BMC module (BMC, Baseboard Management Controller) on the motherboard, the fan speed cannot be controlled when the BMC is not started.

[0004] Therefore, it is necessary to invent a technical solution for reducing the noise caused by the fan when testing the server motherboard. Utility Model Content

[0005] The utility model aims to provide a server fan control system to achieve noise reduction.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A server fan control system includes: a server mainboard, having a first signal sending module, the first signal sending module having a first PWM signal; a fan device, connected to the server mainboard through the first signal sending module; a second signal sending module, connected to the fan device, the second signal sending module having a second PWM signal; a signal switching device, the first signal sending module and the second signal sending module are both selectively connected to the fan device through the signal switching device, and a controller, communicatively connected to the server mainboard and electrically connected to the signal switching device, the controller receiving a test information sent by the server mainboard, the test information including mainboard function test information and fan function test information , wherein, when the controller receives the mainboard function test information sent by the server mainboard, the controller sends a high-level signal to the signal switching device to connect the first signal sending module with the fan device, and the fan device runs at a first speed according to the first PWM signal control sent by the first signal sending module; when the controller receives the fan function test information sent by the server mainboard, the controller sends a low-level signal to the signal switching device to connect the second signal sending module with the fan device, and the fan device runs at a second speed according to the second PWM signal control sent by the second signal sending module, and the second speed is greater than the first speed.

[0008] Preferably, the duty cycle of the second PWM signal is greater than the duty cycle of the first PWM signal.

[0009] Preferably, the duty cycle of the first PWM signal is in the range of 40%-50%.

[0010] Preferably, the second signal sending module is a pulse signal regulator.

[0011] Preferably, the controller is connected to a port on the server mainboard via a USB data cable, and the server mainboard transmits the test information to the controller via the port.

[0012] Preferably, the fan device includes fan blades, a fan motor and a motor driver, the fan blade transmission is installed on the fan motor, the motor driver is connected to the fan motor, and the motor driver is used to control the speed of the fan motor according to the first PWM signal or the second PWM signal.

[0013] Compared with the prior art, the beneficial effects of the utility model are: it solves the deficiencies existing in the background technology very well, through the above-mentioned control system, when performing a functional test on the server motherboard, the fan device is operated at a first speed under the action of the first PWM signal, and the fan device at the first speed has a slower speed and therefore generates less noise, thereby reducing the noise caused by the fan device when performing a functional test on the server motherboard, and protecting the physical and mental health of the tester; secondly, when it is necessary to test the fan function, the fan device is operated at a second speed under the action of the second PWM signal, and the fan device at the second speed has a faster speed to meet the speed requirement in the test, and ensure the functional integrity of the fan device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the schematic diagram of the server fan control system. DETAILED DESCRIPTION

[0015] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0016] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0017] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0018] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0019] See also Figure 1The utility model provides a server fan control system, which is applied in server function testing. The control system includes a server mainboard 101 having a first signal sending module 102, a fan device 103 connected to the server mainboard 101 through the first signal sending module 102, a second signal sending module 104 having a second PWM signal, a signal switching device 105 and a controller 106. The first signal sending module 102 has a first PWM signal. Both the first signal sending module 102 and the second signal sending module 104 are selectively connected to the fan device 103 through the signal switching device 105. Then, different PWM signals are provided to the fan device 103 according to current test information of the server mainboard 101 to change the rotation speed of the fan device 103, reduce the running time of the fan device 103 at a high rotation speed, and make the fan device 103 rotate at a low speed in some time periods, thereby achieving noise reduction, greatly overcoming the defect of high noise during the test process of the server mainboard 101, and protecting the health of testers.

[0020] In this embodiment, the signal switching device 105 determines whether the fan device 103 receives the first PWM signal or the second PWM signal. The first signal sending module 102 and the second signal sending module 104 are selectively connected to the fan device 103 through the signal switching device 105. More specifically, when the controller 106 receives the motherboard function test information sent by the server motherboard 101, the controller 106 sends a high-level signal to the signal switching device 105 to connect the first signal sending module 102 to the fan device 103. The fan device 103 runs at a first speed according to the first PWM signal control sent by the first signal sending module 102. Next, when the controller 106 receives the fan function test information sent by the server motherboard 101, the controller 106 sends a low level signal to the signal switching device 105 to connect the second signal sending module with the fan device 103, and the fan device 103 is controlled to run at a second speed according to the second PWM signal sent by the second signal sending module, and the second speed is greater than the first speed. In particular, when performing conventional tests unrelated to the fan device 103, the fan device 103 will run at a low speed, that is, the first speed; when performing tests related to the fan device 103, the fan device 103 will run at a high speed, that is, the second speed. In detail, the signal switching device 105 can be a relay. When the relay receives a high-level signal, the first signal sending module 102 on the server motherboard 101 will be connected to the fan device 103. At this time, the fan device 103 rotates at a first speed under the action of the first PWM signal. When the relay receives a low-level signal, the second signal sending module will be connected to the fan device 103. At this time, the fan device 103 rotates at a second speed under the action of the second PWM signal. Since the second speed is greater than the first speed, the greater the speed, the greater the noise. Therefore, when the controller 106 receives the motherboard function test information, the fan device 103 will not participate in the test. At this time, the fan device 103 will rotate at the first speed to reduce noise. When the controller 106 receives the fan function test information, the fan device 103 needs to be put into the test at a higher speed to complete the test of itself. Therefore, at this time, the fan device 103 will rotate at the second speed to meet the test requirements. Through the above control method, it is ensured that the speed of the fan device 103 will increase only when it is in the tested state, and the speed will decrease at other times to reduce the rotation time of the fan device 103 at a high speed, thereby reducing the noise generated by the server motherboard 101 during the test, optimizing the entire test process, and ensuring the health of the operators.

[0021] In this embodiment, the duty cycle of the second PWM signal is greater than the duty cycle of the first PWM signal. First, the PWM signal is a periodic signal of a specific frequency, usually in the range of tens of kilohertz to hundreds of kilohertz. This signal is called a PWM signal, which consists of a series of high-level and low-level pulse combinations. Then, the duty cycle refers to the width of the high-voltage flat pulse in the PWM signal. By modifying the time ratio of the high frequency in the PWM signal, that is, modifying the duty cycle, the width of the pulse is proportional to the average input voltage of the fan, thereby controlling the speed of the fan. A longer high level will provide a higher input voltage average value, which will increase the motor speed; a shorter high level time will reduce the input voltage average value, which will reduce the motor speed. In other words, the larger the duty cycle of the PWM signal, the faster the fan speed. In this embodiment, since the duty cycle of the second PWM signal is greater than the duty cycle of the first PWM signal, the second speed corresponding to the second PWM signal will be greater than the first speed corresponding to the first PWM signal. Since the duty cycle of a PWM signal is relatively small, the duty cycle of the first PWM signal can be set within the range of 40%-50%, while the duty cycle of the second PWM signal is relatively large and the speed of the fan device 103 is required to meet the speed requirement of the server motherboard 101 during testing. Therefore, the duty cycle of the second PWM signal can be set within the range of 60%-100%.

[0022] Furthermore, in this embodiment, the second signal sending module 104 is a pulse signal regulator, which is a device that converts a pulse signal into a signal with a phase change, thereby realizing the output of the second PWM signal. In the pulse signal regulator, the duty cycle of the second PWM signal is adjusted within a range of 0%-100%. Secondly, the operating voltage of the pulse signal regulator can be provided by the controller 106, and its operating voltage is generally 5V.

[0023] Next, in this embodiment, the controller 106 is connected to a port on the server motherboard 101 via a USB data cable, and the server motherboard 101 transmits the test information to the controller 106 through the port, thereby achieving a communication connection between the two and realizing the function of the server motherboard 101 transmitting the test information to the controller 106.

[0024] Furthermore, the fan device 103 includes a fan blade, a fan motor and a motor driver, the fan blade transmission is installed on the fan motor, the motor driver is connected to the fan motor, and the motor driver is used to control the speed of the fan motor according to the first PWM signal or the second PWM signal. In other words, the first PWM signal and the second PWM signal transmitted to the fan device 103 will be received by the motor starter, and then the motor driver drives the fan motor to work according to the duty cycle relative to the PWM signal, thereby realizing the control of the fan blade speed.

[0025] In summary, the server fan control system provided by the utility model solves the shortcomings existing in the background technology very well. Through the above control system, when performing a functional test on the server motherboard 101, the fan device 103 is operated at a first speed under the action of a first PWM signal. The fan device 103 at the first speed has a slower speed and therefore generates less noise, thereby reducing the noise caused by the fan device 103 when performing a functional test on the server motherboard 101, thereby ensuring the physical and mental health of the tester. Secondly, when it is necessary to test the fan function, the fan device 103 is operated at a second speed under the action of a second PWM signal. The fan device 103 at the second speed has a faster speed to meet the speed requirement in the test, thereby ensuring the functional integrity of the fan device 103.

[0026] According to the disclosure and teaching of the above description, the technical personnel in the field to which the utility model belongs can also change and modify the above implementation. Therefore, the utility model is not limited to the specific implementation methods disclosed and described above, and some modifications and changes to the utility model should also fall within the scope of protection of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the utility model.

Claims

1. A server fan control system, characterized in that: include: The server mainboard has a first signal sending module, wherein the first signal sending module has a first PWM signal; A fan device connected to the first signal sending module of the server mainboard; A second signal sending module, connected to the fan device, wherein the second signal sending module has a second PWM signal; a signal switching device, selectively connecting the first signal sending module and the second signal sending module to the fan device through the signal switching device, and A controller is connected to the server mainboard in communication and electrically connected to the signal switching device, wherein the controller receives a test message sent by the server mainboard, wherein the test message includes mainboard function test information and fan function test information. When the controller receives the motherboard function test information sent by the server motherboard, the controller sends a high level signal to the signal switching device to connect the first signal sending module with the fan device, and the fan device runs at a first speed according to the first PWM signal control sent by the first signal sending module. When the controller receives the fan function test information sent by the server mainboard, the controller sends a low-level signal to the signal switching device to connect the second signal sending module and the fan device. The fan device runs at a second speed according to the second PWM signal control sent by the second signal sending module, and the second speed is greater than the first speed.

2. The server fan control system according to claim 1, characterized in that: The duty cycle of the second PWM signal is greater than the duty cycle of the first PWM signal.

3. The server fan control system according to claim 1, characterized in that: The duty cycle of the first PWM signal is in the range of 40%-50%.

4. The server fan control system according to claim 1, characterized in that: The second signal sending module is a pulse signal regulator.

5. The server fan control system according to claim 1, characterized in that: The controller is connected to a port on the server mainboard via a USB data line, and the server mainboard transmits the test information to the controller via the port.

6. The server fan control system according to claim 1, characterized in that: The fan device includes fan blades, a fan motor and a motor driver. The fan blade transmission is installed on the fan motor. The motor driver is connected to the fan motor. The motor driver is used to control the rotation speed of the fan motor according to the first PWM signal or the second PWM signal.

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