CN111749919B

CN111749919B - Fan control system

Info

Publication number: CN111749919B
Application number: CN202010475338.8A
Authority: CN
Inventors: 黄柏胜
Original assignee: Asia Vital Components Co Ltd
Current assignee: Asia Vital Components Co Ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2022-06-07
Anticipated expiration: 2040-05-29
Also published as: CN111749919A

Abstract

The invention provides a fan control system, which comprises a plurality of fans and a control unit, wherein the control unit is provided with a controller and a storage, the storage stores first fan starting data with a plurality of first starting time points and a plurality of first starting input values, the controller sequentially controls a plurality of output pins to output a plurality of output signals corresponding to the plurality of first starting input values according to the plurality of first starting time points, each fan is provided with a fan controller and a fan storage, second fan starting data which are the same as the first fan starting data are stored in the fan storage, and the fan controller outputs a driving signal corresponding to each second input value according to each second starting time point of the second fan starting data which are compared and accord with the output signals so as to control the operation of the fan.

Description

Fan control system

Technical Field

The present invention relates to a fan control system, and more particularly, to a fan control system capable of reducing an instantaneous start current.

Background

Generally, computers are classified into Personal computers (Personal computers), Server Work stations (Server Work stations), and Super computers (Super computers) according to their application levels. Among them, the personal computer usually uses one or two processors, mainly responsible for daily administrative affairs processing and providing related multimedia entertainment functions; for some operations with more complex operations, such as the operation of 3D computer graphics, the workstations are still widely used, and in order to meet the application requirements of the network, servers with 2 to 4 processors are generally selected in the industry, and for some special applications, server systems with 8 to 16 processors may also be selected; as for application fields requiring ultra-high computation performance for specific applications, such as nuclear bomb simulation, meteorological application, genetic engineering, etc., a Super Computer (Super Computer) composed of dozens or even hundreds or thousands of processors (or sub Computer systems) connected in series is usually used.

With the progress of semiconductor manufacturing process, chip sets such as Central Processing units (cpu) have been developed from micron level to nanometer level, and the number of transistors in the chip sets can reach hundreds of millions, so that the chip sets generate extremely high heat during operation, and once the generated heat is not properly dissipated, the heat accumulated in the body can cause the ambient temperature of the system to be too high, thereby causing abnormal conditions such as system stability reduction and even downtime.

In the prior art, the heat dissipation method using convection phenomenon formed by a plurality of heat dissipation fans installed inside the housing is widely used because the temperature inside the housing can be effectively reduced and the manufacturing cost is reasonable. However, the disadvantages of this technique are: the initial time of the fan is fixed, so when the server is powered on, because all the hardware devices connected to the server operate at full speed, all the heat dissipation fans in the server will also operate at the same time, which easily causes the peak current (or called current peak value) of the corresponding

current signals

301, 302, 303, 304 when the fans are powered on as shown in fig. 1 to be directly added by multiple times of the number of the fans, so that the total current signal 300 of the fans is a vertically-added total peak current, but the system has a limitation and an over-current protection mechanism for the fan startup current, so the total peak current 300 of the current signals when the fans are powered on (i.e. the instantaneous current when the fans are powered on at the same time is too high) has relatively large instantaneous power consumption on the server, the system is easy to be unstable and even crashed, or the system is triggered by mistake to cause overcurrent protection of the system, so that a plurality of fans cannot be started and operated smoothly, and the system is overheated to be turned off and fails. Therefore, how to solve the defects of high instantaneous current and the like when the server is started becomes a technical problem to be solved in the industry.

Disclosure of Invention

An object of the present invention is to provide a fan control system capable of reducing the instant start current.

Another objective of the present invention is to provide a fan control system that can achieve different peak current reductions.

To achieve the above object, the present invention provides a fan control system, which comprises a plurality of fans and a control unit, wherein the control unit has a controller and a memory connected to the controller, the controller has a plurality of output pins, the memory stores first fan start data, the first fan start data includes a plurality of different first start time points and a plurality of different first start input values, each first start time point corresponds to each first start input value, the controller sequentially controls the plurality of output pins to output a plurality of output signals corresponding to the plurality of first start input values according to the plurality of first start time points, each output pin is electrically connected to each fan, each fan has a fan controller and a fan storage connected to the fan controller, the fan storage stores second fan start data identical to the first fan start data, the second fan starting data comprises a plurality of different second starting time points and a plurality of different second starting input values, each second starting time point corresponds to each second starting input value, the fan controller compares the second fan starting data which accords with the output signal from the fan storage according to the corresponding output signal, and each second starting time point of the second fan starting data outputs a driving signal which corresponds to each second input value to control and start the fan to operate; the design of the fan control system effectively reduces the instant superposed starting current and ensures the whole fan control system to operate stably.

Drawings

Fig. 1 is a schematic diagram of a starting peak current waveform of a plurality of conventional fans.

FIG. 2 is a block diagram illustrating an embodiment of the present invention.

Fig. 3A is a schematic diagram of a first fan start data table according to an embodiment of the invention.

Fig. 3B is a schematic diagram of a second fan startup data table of the first and second fans according to an embodiment of the invention.

Fig. 3C is a schematic diagram of a second fan startup data table of the third fan and the fourth fan according to an embodiment of the invention.

Fig. 4 is a schematic diagram of waveforms of power signals and a summed power signal of a plurality of fans according to an embodiment of the invention.

FIG. 5A is a diagram of a fan start data table according to an embodiment of the invention.

FIG. 5B is a diagram of a fan start-up table according to another embodiment of the present invention.

FIG. 6 is a table illustrating fan startup data according to an alternative embodiment of the present invention.

Description of reference numerals: 1-a fan control system; 10. 11, 12, 13-first, second, third, fourth fans; 101. 111, 121, 131-fan controller; 102. 112, 122, 132-fan reservoir; 103. 113, 123, 133-first, second, third, fourth current signals; 100-summing the power signals; 15-a control unit; 150-a controller; 151. 152, 153, 154-first, second, third, fourth output pins; 156-power pin; 157-a reservoir; s1, S2, S3, S4-first, second, third, fourth output signals; 17-first fan start data; 171a, 172a, 173a, 174a, 175 a-first, second, third, fourth, five first starting points in time; 171b, 172b, 173b, 174b, 175 b-first, second, third, fourth, five first enable input values; 178-input voltage value; 18-second fan start data; 181a, 182a, 183a, 184a, 185 a-first, second, third, fourth, five second starting points in time; 181b, 182b, 183b, 184b, 185 b-first, second, third, fourth, five second enable input values; 186-fan voltage value; vc-input voltage.

Detailed Description

The above objects, together with the structural and functional features thereof, are accomplished by the preferred embodiments according to the accompanying drawings.

Fig. 2 is a block diagram illustrating an embodiment of a fan control system according to the present invention; FIG. 3A is a diagram illustrating a first fan start-up table according to an embodiment of the invention; FIG. 3B is a diagram illustrating a second fan startup table of the first and second fans according to an embodiment of the present invention; FIG. 3C is a diagram illustrating a second fan startup table of the third and fourth fans according to an embodiment of the present invention; FIG. 4 is a diagram illustrating waveforms of power signals of a plurality of fans and a summed power signal according to an embodiment of the present invention; FIG. 5A is a diagram of a fan start data table according to an embodiment of the invention; FIG. 5B is a diagram illustrating a fan start data table according to another embodiment of the present invention; FIG. 6 is a table illustrating fan startup data according to an alternative embodiment of the present invention. As shown in the figure, the fan control system 1 is applied to an electronic device (such as a computer, a server, a communication chassis or other electronic devices), the fan control system 1 includes a plurality of fans and a control unit 15, the plurality of fans are selectively provided with a first fan 10, a second fan 11, a third fan 12 and a fourth fan 13 for illustration in the embodiment, the control unit 15 has a controller 150 and a storage 157, the controller 150 is represented as a Micro Controller Unit (MCU) in the embodiment, but is not limited thereto. The controller 150 has a plurality of output pins and a power pin 156 for receiving an input voltage Vc (such as 12 volts or 10 volts), each output pin is electrically connected to a corresponding fan, the plurality of output pins has a first output pin 151, a second output pin 152, a third output pin 153, and a fourth output pin 154, the first, second, third, and

fourth output pins

151, 152, 153, and 154 are represented by a Pulse Width Modulation (PWM) output pin in this embodiment for outputting PWM signals, i.e. output signals, i.e. first, second, third, and

fourth output pins

151, 152, 153, and 154 for outputting a first output signal S1, a second output signal S2, a third output signal S3, and a fourth output signal S4 in sequence, and transmitting the output signals to the corresponding first, second, third, and

fourth fans

10, 11, 12, 13, the first, second, third and

fourth output pins

151, 152, 153 and 154 are electrically connected to the first, second, third and

fourth fans

10, 11, 12 and 13, respectively. In one embodiment, the controller 150 includes pins for performing other control operations in addition to the first to

fourth output pins

151, 152, 153, and 154.

In one embodiment, the controller 150 may be a processor or a digital signal processor, and the output pin is a voltage output pin or a serial data output pin or other specific pins (e.g., I/O pins) for outputting the output signal (e.g., voltage signal or serial data signal) to control the activation of the corresponding fan.

In addition, the number of the output pins and the fans of the present invention is not limited to the four output pins and the four fans, and a user can adjust and select the controller 150 with more than two output pins to match with more than two fans according to the design of the system heat dissipation requirement in advance, for example, the controller 150 has five output pins (e.g., five pwm output pins) electrically connected to five corresponding fans, and the five output pins are used for transmitting the five output signals to the corresponding five fans.

The storage 157 may be a random access memory (ram), a flash memory (FlashRAM), a hard disk (HDD), a Solid State Disk (SSD), or a USB flash drive or other units capable of accessing data, the storage 157 is electrically connected to the controller 150, and the storage 157 stores therein a first fan start data 17, the first fan start data 17 is represented as a fan start data table (as shown in fig. 3A), the first fan start data 17 includes a plurality of different first start time points, a plurality of different first start input values, and an input voltage value 178, the input voltage value 178 is an input voltage value 178 (e.g., 12 volts or 10 volts) of each fan (i.e., the first, the second, the third, and the

fourth fans

10, 11, 12, 13) in the first fan start data 17, and the plurality of first start time points are set as five first start time points (i.e., the first to fifth first start time points 171a, a, 172a, 173a, 174a, 175a), the five first start-up time points are different from each other, the plurality of first start-up input values are provided with five first start-up input values (i.e., the first to fifth first start-

up input values

171b, 172b, 173b, 174b, 175b) corresponding to each fan, the five first start-up input values are different from each other, and the five first start-up time points correspond to the five first start-up input values, and this embodiment shows that there are four sets of the five first start-up time points and the five first start-up input values in the first fan start-up data 17, which correspond to the four

fans

10, 11, 12, 13.

Each group of the five first start times is delayed by a time, for example, the fifth first start time 175a in each group is later than the fourth first start time 174a, the fourth first start time 174a is later than the third first start time 173a, the third first start time 173a is later than the second first start time 172a, and the second first start time 172a is later than the first start time 171 a. And the first group of the five first start-up time points and the second, third, and fourth groups of the five first start-up time points are delayed by a time, for example, the first start-up time point 171a in the first group corresponding to the first fan 10 in fig. 3A is earlier than the first start-up time point 171a in the second group (or the third and fourth groups) corresponding to the second fan 11 (or the third and fourth fans 12 and 13), the second start-up time point 172a in the first group corresponding to the first fan 11 is earlier than the second start-up time point 172a in the second group (or the third and fourth groups) corresponding to the second fan 12 (or the third and fourth fans 12 and 13), and so on in fig. 3A. And the fifth first enable input value 175b is greater than the fourth first enable input value 174b, the fourth enable input value 174b is greater than the third first enable input value 173b, the third first enable input value 173b is greater than the second first enable input value 172b, and the second enable input value 172b is greater than the first enable input value 171b in each group.

In addition, the controller 150 sequentially controls the plurality of output pins to output a plurality of output signals corresponding to the plurality of first start-up input values according to the plurality of first start-up time points, that is, the controller 150 compares the input voltage value 178 (e.g., 12 volts) in the first fan start-up data 17 corresponding to the input voltage Vc (e.g., 12 volts) from the storage 157 according to the input voltage Vc, and causes the controller 150 to sequentially control the first, second, third, and

fourth output pins

151, 152, 153, and 154 to output the first, second, third, and fourth output signals S1, S2, S3, S4 corresponding to the five first start-up input values of the first, second, third, and

fourth fans

10, 11, 12, and 13 according to the five first start-up time points corresponding to the first, second, third, and

fourth fans

10, 11, 12, and 13 in the first fan start-up data 17, and to transmit the first, second, third, fourth, output signals S1, S2, S3, S4 corresponding to the first start-up input values, Two, three and four

fans

10, 11, 12 and 13.

In one embodiment, referring to fig. 5A, the storage 157 stores a plurality of first fan start data 17, and the input voltage 178 (e.g., 12 volts or 10 volts) of each of the first fan start data 17 is different, for example, the input voltage 178 of the first fan start data 17 is, for example, 12 volts corresponding to 12 volts of the fan, and the input voltage 178 of the second fan start data 17 is, for example, 10 volts corresponding to 10 volts of the fan. In another embodiment, referring to fig. 5B, the storage 150 stores a plurality of first fan start data 17, wherein the data types (including the input voltage value, the first start input value, and the first start time point) in each of the first fan start data 17 are different, wherein a first fan start data 17 is activated by different duty cycle pulse width modulation (i.e., different start input values) corresponding to different start time points, a second fan start data 17 is activated by different voltages (i.e., different start input values) corresponding to different start time points, and a third fan start data 17 is activated by different serial string data (e.g., different numeric string strings, i.e., different start input values) corresponding to different start time points.

Referring to fig. 2, 3A, 3B and 3C, each fan (i.e. the first, -second, third and

fourth fans

10, 11, 12 and 13) is provided with a

fan controller

101, 111, 121 and 131 and a

fan storage

102, 112, 122 and 132 connected to the

fan controller

101, 111, 121 and 131, the

fan storage

102, 112, 122 and 132 stores a second fan start data 18 identical to the first fan start data 17, the second fan start data 18 comprises a plurality of different second start time points, a plurality of different second start input values and a fan voltage value 186 identical to the corresponding input voltage value, each second start time point corresponds to each second start input value, the plurality of second start time points are provided with five second

start time points

181a, 182a, 183A, 184a and 185a, the five second start time points are different from each other, the plurality of second start-up input values are provided with five second start-

up input values

181b, 182b, 183b, 184b, 185b, which are different from each other, and the five second start-up time points correspond to the five second start-up input values, and the first, second, third, and

fourth fans

10, 11, 12, 13 correspond to the five second start-

up time points

181a, 182a, 183a, 184a, 185a of the

fan storages

102, 112, 122, 132 and the five second start-

up input values

181b, 182b, 183b, 184b, 185 b.

In addition, the data (including the first start input value, the first start time point and the input voltage value) of each first fan start data 17 in the controller 150 is matched and identical with the data (including the second start input value, the second start time point and the fan voltage value) of the corresponding second fan start data 18 in each fan, and the five second start time points (i.e., the first to fifth second

start time points

181a, 182a, 183a, 184a, 185a) and the five second start input values (i.e., the first to fifth second

start input values

181b, 182b, 183b, 184b, 185b) of the first fan 10 (the second fan 11, the third fan 12, or the fourth fan 13) of the embodiment are identical with the five first

start time points

171a, 172a, 173a, 183b, 185b) of the corresponding first group (the second group, the third group, or the fourth group), 174a, 175a and the five first

start input values

171b, 172b, 173b, 174b, 175b, so the description thereof is omitted here for brevity. The fan voltage 186 is the voltage of the corresponding fan in the second fan start data 18, and the voltages of the first, second, third and

fourth fans

10, 11, 12 and 13 are the same in this embodiment.

The

fan controllers

101, 111, 121, 131 compare the second fan start data 18 corresponding to the output signal from the

fan storages

102, 112, 122, 132 according to the output signal, and output a driving signal corresponding to each second input value at each second start time point of the second fan start data 18 to control the start of the fan operation, i.e. the fan controller 101 (or 111 or 121 or 131) of the first fan 10 (or the second fan 11 or the third fan 12 or the fourth fan 13) compares the second fan start data 18 corresponding to the first output signal S1 (or the second output signal S2 or the third output signal S3 or the fourth output signal S4) from the fan storages 101 (or 111 or 121 or 131) according to the first output signal S1 (or the second output signal S2 or the third output signal S3 or the fourth output signal S4), and the first fan 10 (or the second fan 11 or the third fan 12 or the fourth fan 101 or the fourth fan 14) controls the second fan start data 18 (or 111 or 121 or 131) outputting a first driving signal (or a second driving signal or a third driving signal or a fourth driving signal) corresponding to each second start input value at each second start time point of the second fan start data 18 to control the first fan 10 (or the second fan 11 or the third fan 12 or the fourth fan 13) to operate, and obtaining a power signal (such as the first, second, third, and fourth

current signals

103, 113, 123, 133) corresponding to the first, second, third, and

fourth fans

10, 11, 12, 13 respectively and a summed power signal 100 of all fans as shown in fig. 4, wherein peak currents (or current peaks) of the first, second, third, and fourth

current signals

103, 113, 123, 133 are staggered. For example, the fan controller 101 of the first fan 10 compares the second start input value 182a of the second fan start data 18 corresponding to the first output signal S1 from the fan storage 101 according to the first output signal S1 being a Pulse Width Modulation (PWM) signal with a duty ratio of 25% for example, so that the fan controller 101 of the first fan 10 outputs a Pulse Width Modulation (PWM) signal with a duty ratio of 25% for example corresponding to the first drive signal with a duty ratio of 25% for example only when the second start time point 182a of the second fan start data 18 is 0.7 seconds for example, to start the first fan 10, and the rest of the second, third, and

fourth fans

11, 12, 13 and so on. Therefore, the present invention utilizes the time-sharing starting manner to make the first, second, third and

fourth fans

10, 11, 12 and 13 automatically determine the starting time to operate, so that the peak values of the first, second, third and fourth driving signals S1, S2, S3 and S4 are staggered, thereby effectively achieving the effects of time-sharing starting and reducing the instant starting current.

In addition, the fan control system 1 of the present invention enables a user to preset data (such as the first and second start input values, the first and second start time points, the input voltage value 178 and the fan voltage value 186) in the first and second

fan start data

17, 18 in advance to establish different output signals (i.e. the first, second, third and fourth output signals S1, S2, S3, S4) and different driving signals to define the initial start time points after the power is supplied to the plurality of fans (i.e. the first to

fourth fans

10, 11, 12, 13), so that the plurality of fans can automatically determine to operate (or operate) according to the corresponding start time differences, and the summed power signal 100 when all fans are started is a long stepped summed peak current (as shown in fig. 4) extending obliquely from bottom to top, so as to start and effectively reduce the summed peak current when the plurality of fans are started in a time-sharing manner, and further effectively make the whole fan control system 1 operate stably, and to avoid false triggering of the over-current protection of the fan control system 1.

The following description is given:

when the fan control system 1 is powered on, the controller 150 receives the input voltage Vc of 12 volts, and compares the input voltage value 178 of the first fan start data 17 corresponding to the input voltage Vc with 12 volts in the storage 157, the controller 150 reads the five first start time points 171a, 172a, 173a, 174a, 175a corresponding to the first, second, third, and fourth fans 10, 11, 12, 13 in the first fan start data 17 corresponding to the input voltage value 178 and the five first start input values 171b, 172b, 173b, 174b, 175b, and the controller 150 controls the first fan according to the five first start time points 171b, 172b, 173b, 174b, 175b, wherein the controller 150 sequentially controls the first start time points 171a, 172a, 173a, 174a, 175a corresponding to the first, second, third, and fourth start time points 171b, 172b, 173b, 174b, 175b, The second, third and fourth output pins 151, 152, 153 and 154 output the first, second, third and fourth output signals S1, S2, S3 and S4 corresponding to the four sets of five first start input values 171b, 172b, 173b, 174b and 175b, so that the first fan 10 receives the PWM signal corresponding to the 25% duty ratio of the first output signal S1, and then compares the second start input value 182b in the second fan start data 18 corresponding to the first output signal S1 with the 25% duty ratio of the second start input value S182 b from the fan storage 101, and at this time, the fan controller 101 of the first fan 10 outputs the first driving signal (e.g. the 25% duty ratio PWM signal) corresponding to the 25% duty ratio of the second start input value 182b at the second start time point 182a of 0.7 seconds to control and start the first fan 101 to operate, and then the fan controller 111 of the second fan 11 controls and starts the first fan 101 according to the second start input value 182a at the second start time point after the second fan starts the second fan 101 is started The fan 10 outputs the second driving signal (e.g. 25% duty cycle pwm signal) to control the second fan 11 to start operation after 0.2 second (i.e. waiting for 0.9 second), then the fan controller 121 of the third fan 12 outputs the third driving signal (e.g. 25% duty cycle pwm signal) to control the third fan to start operation after the second start time point 181a is later than the second fan 11 for 0.2 second (i.e. waiting for 1.1 second), finally the fan controller 131 of the fourth fan 13 outputs the fourth driving signal (e.g. 25% duty cycle pwm signal) to control the fourth fan 13 to start operation after the second start time point 181a is later than the third fan 12 for 0.2 second (i.e. waiting for 1.3 seconds), and the remaining four second start time points 181a, 183a of the first, second, third, and fourth fans 10, 11, 12, 13 are started, 184a, 185a output first, second, third, and fourth drive signals corresponding to the remaining four second enable inputs 181b, 183b, 184b, 185b control the start-up fan operation, and so on.

In an alternative embodiment, referring to fig. 2 and 6, the five first start time points in the single first fan start data 17 in the controller 150 correspond to the plurality of fans (e.g. the first, second, third, and fourth fans 10, 11, 12, and 13) with the five first start input values, the second start data 18 in the plurality of fans is the same as the first fan start data 17 in the controller 150, and the controller 150 can control the first, second, third, and fourth output pins 151, 152, 153, and 154 to output a duty ratio corresponding to the first preset start input value of 0% at a time interval (e.g. 1 second) in sequence when the fan control system 1 is powered on according to the sequence of the plurality of output signals output by the plurality of output pins and the preset start input value corresponding to each output pin when the initial power supply is preset by the user, for example, when the fan control system 1 is powered on, the controller 150 controls the first, second, third, and fourth output pins 151, 152, 153, and 154 to output the duty ratio corresponding to the first preset start input value of 0% at a time interval (e.g. 1 second), The first, second, third and fourth output signals S1, S2, S3 and S4 with the second preset start input value 172b being 25% duty ratio, the third preset start input value being 50% duty ratio and the fourth preset start input value being 75% duty ratio are sequentially transmitted to the corresponding first, second, third and fourth fans 10, 11, 12 and 13, so that the first fan 10 receives the pwm signal with the duty ratio of 0% corresponding to the first output signal S1, and the fan controller 101 outputs the first driving signal (e.g., the pwm signal with the duty ratio of 0%) with the first second start input value 181b being 0% duty ratio in the second fan start data 18 corresponding to the first output signal S1, so as to control the first fan 11 to start (start) the initial operation (to be started) and then the second fan 11 is outputted from the fan controller 111 with the second driving signal (e.g., the pwm signal with the duty ratio of 25% corresponding to the second start input value 182b ) The second fan 11 is controlled to start the initial operation, then the third fan 12 is controlled to start the initial operation of the third fan 11 by outputting a third driving signal (e.g. a pulse width modulation signal with a 50% duty ratio) corresponding to a third second start input value 183b with a 50% duty ratio from the fan controller 121, and finally the fourth fan 13 is controlled to start the initial operation of the fourth fan 11 by outputting a fourth driving signal (e.g. a pulse width modulation signal with a 75% duty ratio) corresponding to a fourth second start input value 184b with a 75% duty ratio from the fan controller 131, at this time, after all of the fans have been initially operated, the subsequent controller 150 is sequentially operated according to the first fan start data 17 and the second fan start data 18 corresponding to the multiple fans.

Therefore, in the above embodiments, by the design of the fan control system 1 of the present invention, the start time points of all the fans are delayed and staggered from each other when starting, so that the start current of the fan control system 1 can effectively reduce the instantly overlapped start current, and simultaneously can avoid the switch of the system which is not turned on initially, and can also effectively avoid the over-current protection of the system and achieve the stable operation of the fan control system 1.

Claims

1. A fan control system, comprising:

the controller is provided with a plurality of output pins, first fan starting data are stored in the storage, the first fan starting data comprise a plurality of different first starting time points and a plurality of different first starting input values, each first starting time point corresponds to each first starting input value, and the controller sequentially controls the plurality of output pins to output a plurality of output signals corresponding to the plurality of first starting input values according to the plurality of first starting time points; and

the fan controller compares the second fan starting data which accords with the output signal from the fan storage according to the corresponding output signal, and outputs a driving signal which corresponds to each second starting input value by each second starting time point of the second fan starting data so as to control the fan to start to operate;

the second time starting point corresponding to each fan in the plurality of fans is set in a delayed mode, and when the fan is started before the previous second time starting point and is not fully started in operation, the fan which is set in a delayed mode relative to the previous second time starting point and is located behind the next second time starting point starts to be started.

2. The fan control system of claim 1, wherein the plurality of first start-up time points have five first start-up time points corresponding to each of the fans, the five first start-up time points are different from each other, the plurality of first start-up input values have five first start-up input values corresponding to each of the fans, the five first start-up input values are different from each other, and the five first start-up time points correspond to the five first start-up input values.

3. The fan control system of claim 2, wherein the plurality of second activation time points has five second activation time points, the five second activation time points are different from each other, the plurality of second activation input values has five second activation input values, the five second activation input values are different from each other, and the five second activation time points correspond to the five second activation input values.

4. The fan control system as claimed in claim 3, wherein the plurality of fans includes a first fan, a second fan, a third fan and a fourth fan, the first, second, third and fourth fans correspond to the five second start time points and the five second start input values of the fan storage, the plurality of output pins include a first output pin, a second output pin, a third output pin and a fourth output pin, the first, second, third and fourth output pins are electrically connected to the first, second, third and fourth fans respectively, the first, second, third and fourth output pins are sequentially used to output a first output signal, a second output signal, a third output signal and a fourth output signal, and the first, second, third and fourth output signals are transmitted to the first, second, third and fourth fans.

5. The fan control system as claimed in claim 4, wherein the controller sequentially controls the first, second, third and fourth output pins to output the first, second, third and fourth output signals corresponding to the five first start input values of the first, second, third and fourth fans to the first, second, third and fourth fans according to the five first start time points corresponding to the first, second, third and fourth fans.

6. The fan control system as claimed in claim 4, wherein the fan controller of the first fan compares the second fan start data corresponding to the first output signal from the fan storage according to the first output signal, so that the fan controller of the first fan outputs a first driving signal corresponding to each second start input value at each second start time point of the second fan start data to control the first fan to start operation, the fan controller of the second fan compares the second fan starting data conforming to the second output signal from the fan storage according to the second output signal, and the fan controller of the second fan outputs a second driving signal corresponding to each second starting input value at each second starting time point of the second fan starting data to control and start the second fan to operate.

7. The fan control system as claimed in claim 4, wherein the fan controller of the third fan compares the second fan start data corresponding to the third output signal from the fan storage according to the third output signal, so that the fan controller of the third fan outputs a third driving signal corresponding to each second start input value at each second start time point of the second fan start data to control the third fan to start operation, the fan controller of the fourth fan compares the second fan starting data conforming to the fourth output signal from the fan storage according to the fourth output signal, and the fan controller of the fourth fan outputs a fourth driving signal corresponding to each second starting input value at each second starting time point of the second fan starting data to control and start the fourth fan to operate.

8. The fan control system as claimed in claim 4, wherein the controller compares an input voltage value in the first fan start data corresponding to the input voltage from the storage according to an input voltage, and controls the first, second, third, and fourth output pins to output the first, second, third, and fourth output signals corresponding to the five first start input values of the first, second, third, and fourth fans according to the five first start time points corresponding to the first, second, third, and fourth fans in the first fan start data, and transmits the first, second, third, and fourth output signals to the first, second, third, and fourth fans.

9. The fan control system of claim 1, wherein the plurality of output pins are a pulse width modulation output pin, a voltage output pin or a serial data output pin.

10. The fan control system of claim 1, wherein the plurality of output signals are a pulse width modulation signal, a voltage signal, or a serial data signal.

11. The fan control system of claim 1, wherein the controller is a microcontroller or a processor.

12. The fan control system of claim 11 wherein the controller, when a processor, is a digital signal processor.

13. The fan control system of claim 1, wherein the storage is a random access memory or a flash memory or a hard disk.

14. The fan control system of claim 13, wherein the storage device is a USB flash drive when the storage device is a flash memory.

15. The fan control system of claim 13, wherein the storage device is a solid state drive when the storage device is a hard disk.