CN108302059A - Fan rotational frequency control method and device - Google Patents
Fan rotational frequency control method and device Download PDFInfo
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- CN108302059A CN108302059A CN201510909479.5A CN201510909479A CN108302059A CN 108302059 A CN108302059 A CN 108302059A CN 201510909479 A CN201510909479 A CN 201510909479A CN 108302059 A CN108302059 A CN 108302059A
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- pwm duty
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Abstract
The present invention relates to fan control technical field, a kind of fan rotational frequency control method and device are provided, including：Input preset PWM Duty Cycle control instructions；It reads PWM Duty Cycle control instructions in real time and obtains the value of PWM Duty Cycle, the corresponding rotation speed of the fan value of value of the PWM Duty Cycle is read according to radiation parameter table, and detect the actual speed of fan；Judge whether actual speed and the rotation speed of the fan value of fan are identical, it is, it is loaded into radiation parameter table, it is no, the improved values of PWM Duty Cycle are obtained, and adjust the value of the PWM Duty Cycle in radiation parameter table, and it is loaded into the radiation parameter table after adjustment, it solves the problems, such as not enough rotating speed to be made to reduce with the aging of fan or lubrication, improves the heat dissipation effect of fan, avoid system and the phenomenon that crashing or damaging occur because temperature is too high.
Description
Technical field
The present invention relates to fan technology field more particularly to a kind of fan rotational frequency control methods and device.
Background technology
Currently, the rotation speed of the fan intelligence shaping modes on PC, have segmented, point slope form and multisection type, no
Effective fan control any type pattern, in the software control of heat dissipation, the adjusting of CPU or system temperature
By being determined by pulse width modulation period PWM Duty cycle, as shown in Figure 1, being PWM Duty
The correspondence of cycle and rotation speed of the fan control turning for fan according to the control instruction of PWM Duty cycle
Speed, in heat dissipation is tested, the heat dissipation effect of system depends on air quantity, and the definition of air quantity is that wind speed is cut with air duct
The product of area, wind speed with rotating speed improve and improves, but it is demonstrated experimentally that PWM Duty cycle with turn
The relationship of speed can be inadequate and slack-off with the aging of fan or lubrication, and identical PWM Duty cycle are corresponded to
Rotating speed can reduce so that the heat dissipation effect of fan is deteriorated, system can because temperature too it is high occur crashing or
The phenomenon that damage.
Invention content
The purpose of the present invention is to provide a kind of fan rotational frequency control method and devices, to solve in the prior art
There are fan is due to aging or lubrication is inadequate and slack-off that the corresponding fan of identical PWM Duty cycle is made to turn
Speed reduces the problem of causing the heat dissipation effect of fan to be deteriorated.
First aspect present invention provides a kind of fan rotational frequency control method, and the fan rotational frequency control method includes
Following steps：
A. preset PWM Duty Cycle control instructions are inputted；
B. PWM Duty Cycle control instructions are read in real time and obtains the value of PWM Duty Cycle, according to
Radiation parameter table reads the corresponding rotation speed of the fan value of value of the PWM Duty Cycle, and detects the reality of fan
Border rotating speed；
C. judge whether actual speed and the rotation speed of the fan value of the fan are identical, are to then follow the steps
E, it is no, then follow the steps F；
D. it is loaded into the radiation parameter table；
E. the corresponding PWM Duty Cycle of actual speed for the fan being read according to the radiation parameter table
Preset value, obtained according to the preset value of the value of the PWM Duty Cycle and the PWM Duty Cycle
The improved values of PWM Duty Cycle are taken, and according to described in the adjustment of the improved values of the PWM Duty Cycle
The value of PWM Duty Cycle in radiation parameter table, and it is loaded into the radiation parameter table after adjustment.
With reference to first aspect, in the first possible realization method of first aspect, root in the step E
PWM Duty are obtained according to the value of the PWM Duty Cycle and the preset value of the PWM Duty Cycle
The step of improved values of Cycle is specially：
The preset value of the value of the PWM Duty Cycle and the PWM Duty Cycle are subjected to subtraction meter
It calculates to obtain the improved values of PWM Duty Cycle.
The possible realization method of with reference to first aspect the first, in second of possible realization of first aspect
In mode, described the step of inputting default PWM Duty Cycle control instructions, is specially：
Input makes the PWM Duty Cycle control instructions that the value of PWM Duty Cycle is 50%.
Second of possible realization method with reference to first aspect, in the third possible realization of first aspect
It is further comprising the steps of after step E in mode：
A is returned to step until the actual speed of the fan is identical as the rotation speed of the fan value.
Second aspect of the present invention provides a kind of fan rotation speed control apparatus, and the fan rotation speed control apparatus includes
Following steps：
Setting module, for inputting preset PWM Duty Cycle control instructions；
Read module reads PWM Duty Cycle control instructions and obtains PWM Duty Cycle's in real time
Value, the corresponding rotation speed of the fan value of value of the PWM Duty Cycle is read according to radiation parameter table；
Detection module detects the actual speed of fan；
Control module judges whether the actual speed of the fan and the rotation speed of the fan value are identical, work as judgement
As a result it is when being, to be then loaded into the radiation parameter table, when judging result is no, is then joined according to the heat dissipation
Number table reads the preset value of the corresponding PWM Duty Cycle of actual speed of the fan, according to the PWM
The preset value of the value of Duty Cycle and the PWM Duty Cycle obtain the improvement of PWM Duty Cycle
It is worth, and adjusts the PWM Duty in the radiation parameter table according to the improved values of the PWM Duty Cycle
The value of Cycle, and it is loaded into the radiation parameter table after adjustment.
In conjunction with second aspect, in the first possible realization method of second aspect, the control module root
PWM Duty are obtained according to the value of the PWM Duty Cycle and the preset value of the PWM Duty Cycle
The process of the improved values of Cycle is：
The preset value of the value of the PWM Duty Cycle and the PWM Duty Cycle are subjected to subtraction meter
It calculates to obtain the improved values of PWM Duty Cycle.
In conjunction with the first possible realization method of second aspect, in second of possible realization of second aspect
In mode, the setup unit is additionally operable to make the PWM Duty Cycle that the value of PWM Duty Cycle is 50%.
A kind of fan rotational frequency control method of present invention offer and control device, detect current PWM Duty Cycle
Value in radiation parameter table corresponding rotation speed of the fan, and the current actual speed of fan is detected, when fan turns
When fast value and the actual speed of fan differ, obtains the improved values of PWM Duty Cycle and adjust heat dissipation ginseng
The value of PWM Duty Cycle in number table, and then the rotating speed of fan is adjusted, solve PWM Duty cycle
Wind can be improved with the relationship of rotating speed as the aging of fan or lubrication are not enough and the problem of so that rotating speed is reduced
The heat dissipation effect of fan avoids system and the phenomenon that crashing or damaging occurs because temperature is too high.
Description of the drawings
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or existing skill
Attached drawing is briefly described needed in art description, it should be apparent that, the accompanying drawings in the following description is only
Only it is some embodiments of the present invention, for those of ordinary skill in the art, is not paying creative labor
Under the premise of dynamic property, other drawings may also be obtained based on these drawings.
Fig. 1 is the PWM Duty in a kind of fan rotational frequency control method that an embodiment of the present invention provides
The correspondence schematic diagram of cycle and rotation speed of the fan；
Fig. 2 is a kind of flow chart for fan rotational frequency control method that an embodiment of the present invention provides；
Fig. 3 is a kind of structural schematic diagram for fan rotation speed control apparatus that another embodiment of the invention provides.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with attached drawing and reality
Example is applied, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
Only to explain the present invention, it is not intended to limit the present invention.
In order to illustrate technical scheme of the present invention, illustrated below by specific embodiment.
The embodiment of the present invention provides a kind of fan rotational frequency control method, referring to Fig. 2, rotation speed of the fan controlling party
Method includes the following steps：
Step S101. inputs preset PWM Duty Cycle control instructions；
Specifically, in this step, it is right to preset pulse width modulation period PWM Duty Cycle institutes
The rotation speed of the fan value answered simultaneously forms radiation parameter table.
Step S102. reads PWM Duty Cycle control instructions and obtains PWM Duty Cycle's in real time
Value, the corresponding rotation speed of the fan value of value of PWM Duty Cycle is read according to radiation parameter table, and detects fan
Actual speed.
Specifically, in step s 102, it is preferred that control input makes the value of PWM Duty Cycle be 50%
PWM Duty Cycle.
Specifically, after the actual speed of detection fan interim storage can be carried out to it.
Step S103. judges whether the actual speed of fan is identical as rotation speed of the fan value, is to then follow the steps
S104, it is no, then follow the steps S105；
Step S104. is loaded into radiation parameter table；
Step S105. reads the corresponding PWM Duty Cycle's of actual speed of fan according to radiation parameter table
Preset value obtains PWM Duty according to the preset value of the value of PWM Duty Cycle and PWM Duty Cycle
The improved values of Cycle, and adjust the PWM Duty in radiation parameter table according to the improved values of PWM Duty Cycle
The value of Cycle, and it is loaded into the radiation parameter table after adjustment.
In step S105, obtained according to the preset value of the value of PWM Duty Cycle and PWM Duty Cycle
The step of improved values for taking PWM Duty Cycle is specially：
The preset value of the value of PWM Duty Cycle and PWM Duty Cycle are subjected to subtraction to obtain
The improved values of PWM Duty Cycle.
Specifically, after obtaining PWM Duty Cycle improved values, you can to the PWM Duty in radiation parameter table
The value of Cycle is adjusted, and then is had adjusted the value of PWM Duty Cycle in radiation parameter table and turned with fan
The correspondence of speed.
It should be noted that fan rotational frequency control method of the present invention needs to carry out retest, until fan
Actual speed is identical as rotation speed of the fan value, for example, inputting preset PWM Duty Cycle in step
Multiple default control instructions are set in control instruction, input first PWM Duty Cycle control instruction first,
It reads PWM Duty Cycle and detects the actual speed of fan to be compared judgement with default rotation speed of the fan,
When judging result difference, the improved values of PWM Duty Cycle are obtained to be updated to radiation parameter table,
Step A second PWM Duty Cycle control instruction of input is being repeated after update, until the reality of detection fan
Border speed is until identical as default rotation speed of the fan, and further, fan rotational frequency control method further includes following
Step：It is calculated since inputting first PWM Duty Cycle control instruction, until the practical speed of detection fan
Degree calculates the number of inputted PWM Duty Cycle controls until identical as default rotation speed of the fan, and
Judge whether the number is more than preset times, it is no, then judge fan normal operation, be, then sends out fan
The alarm of aging replaces fan to promote user.
Another kind embodiment of the invention additionally provides a kind of fan rotation speed control apparatus, fan rotation speed control apparatus
Including：
Setting module 201, for inputting preset PWM Duty Cycle control instructions；
Read module 202, for reading PWM Duty Cycle control instructions in real time and obtaining PWM Duty
The value of Cycle reads the corresponding rotation speed of the fan value of value of the PWM Duty Cycle according to radiation parameter table；
Detection module 203 detects the actual speed of fan；
Control module 204 judges whether the actual speed of fan is identical as rotation speed of the fan value, works as judging result
When to be, then it being loaded into radiation parameter table, when judging result is no, then fan being read according to radiation parameter table
The corresponding PWM Duty Cycle of actual speed preset value, according to the value and PWM of PWM Duty Cycle
The preset value of Duty Cycle obtains the improved values of PWM Duty Cycle, and according to PWM Duty Cycle
Improved values adjustment radiation parameter table in PWM Duty Cycle value, and be loaded into adjustment after radiation parameter
Table.
Further, control module 204 is according to the value of PWM Duty Cycle and PWM Duty Cycle
The process that preset value obtains the improved values of PWM Duty Cycle is：
The preset value of the value of PWM Duty Cycle and PWM Duty Cycle are subjected to subtraction to obtain
The improved values of PWM Duty Cycle.
Specifically, after obtaining PWM Duty Cycle improved values, you can to the PWM Duty in radiation parameter table
The value of Cycle is adjusted, and then is had adjusted the value of PWM Duty Cycle in radiation parameter table and turned with fan
The correspondence of speed.
Further, setting module 201 is additionally operable to make the PWM Duty that the value of PWM Duty Cycle is 50%
Cycle。
It should be noted that fan rotation speed control apparatus of the present invention can carry out retest, until the reality of fan
Border rotating speed is identical as rotation speed of the fan value, for example, inputting preset PWM Duty Cycle controls in setup unit
Multiple default control instructions are set in instruction, inputs first PWM Duty Cycle control instruction first, reads
It takes PWM Duty Cycle and detects the actual speed of fan to be compared judgement with default rotation speed of the fan, when
When judging result difference, the improved values of PWM Duty Cycle are obtained to be updated to radiation parameter table, more
Setup unit is set to input second PWM Duty Cycle control instruction after new, until the practical speed of detection fan
Degree is until identical as default rotation speed of the fan, and further, control unit is additionally operable to from first PWM of input
Duty Cycle control instructions start, until the actual speed of detection fan to be all mutually with default rotation speed of the fan
Only, the number of inputted PWM Duty Cycle controls is calculated, and it is default to judge whether the number is more than
Number, it is no, then judge fan normal operation, be, then send out the alarm of fan aging, to promote use
Replace fan in family.
A kind of fan rotational frequency control method of present invention offer and control device, detect current PWM Duty Cycle
Value in radiation parameter table corresponding rotation speed of the fan, and the current actual speed of fan is detected, when fan turns
When fast value and the actual speed of fan differ, obtains the improved values of PWM Duty Cycle and adjust heat dissipation ginseng
The value of PWM Duty Cycle in number table, and then the rotating speed of fan is adjusted, solve PWM Duty cycle
Wind can be improved with the relationship of rotating speed as the aging of fan or lubrication are not enough and the problem of so that rotating speed is reduced
The heat dissipation effect of fan avoids system and the phenomenon that crashing or damaging occurs because temperature is too high.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, no
It can assert that the specific implementation of the present invention is confined to these explanations.For the common of the technical field of the invention
For technical staff, several equivalent substitute or obvious modifications are made without departing from the inventive concept of the premise,
And performance or use is identical, and it is determined by the appended claims specially all to shall be regarded as belonging to the present invention
Sharp protection domain.
Claims (7)
1. a kind of fan rotational frequency control method, which is characterized in that the fan rotational frequency control method includes following
Step：
A. preset PWM Duty Cycle control instructions are inputted；
B. PWM Duty Cycle control instructions are read in real time and obtains the value of PWM Duty Cycle, according to
Radiation parameter table reads the corresponding rotation speed of the fan value of value of the PWM Duty Cycle, and detects the reality of fan
Border rotating speed；
C. judge whether actual speed and the rotation speed of the fan value of the fan are identical, are to then follow the steps
D, it is no, then follow the steps E；
D. it is loaded into the radiation parameter table；
E. the corresponding PWM Duty Cycle of actual speed for the fan being read according to the radiation parameter table
Preset value, obtained according to the preset value of the value of the PWM Duty Cycle and the PWM Duty Cycle
The improved values of PWM Duty Cycle are taken, and according to described in the adjustment of the improved values of the PWM Duty Cycle
The value of PWM Duty Cycle in radiation parameter table, and it is loaded into the radiation parameter table after adjustment.
2. fan rotational frequency control method as described in claim 1, which is characterized in that root in the step E
PWM Duty are obtained according to the value of the PWM Duty Cycle and the preset value of the PWM Duty Cycle
The step of improved values of Cycle is specially：
The preset value of the value of the PWM Duty Cycle and the PWM Duty Cycle are subjected to subtraction meter
It calculates to obtain the improved values of PWM Duty Cycle.
3. fan rotational frequency control method as described in claim 1, which is characterized in that PWM is preset in the input
The step of Duty Cycle control instructions is specially：
Input makes the PWM Duty Cycle control instructions that the value of PWM Duty Cycle is 50%.
4. fan rotational frequency control method as described in claim 1, which is characterized in that also wrapped after step E
Include following steps：
A is returned to step until the actual speed of the fan is identical as the rotation speed of the fan value.
5. a kind of fan rotation speed control apparatus, which is characterized in that the fan rotation speed control apparatus includes：
Setting module, for inputting preset PWM Duty Cycle control instructions；
Read module, for reading PWM Duty Cycle control instructions in real time and obtaining PWM Duty Cycle
Value, the corresponding rotation speed of the fan value of value of the PWM Duty Cycle is read according to radiation parameter table；
Detection module, the actual speed for detecting fan；
Control module, whether the actual speed and the rotation speed of the fan value for judging the fan are identical, when
Judging result is when being, to be then loaded into the radiation parameter table, when judging result is no, is then dissipated according to described
Thermal parameter table reads the preset value of the corresponding PWM Duty Cycle of actual speed of the fan, according to described
The preset value of the value of PWM Duty Cycle and the PWM Duty Cycle obtain PWM Duty Cycle's
Improved values, and adjust according to the improved values of the PWM Duty Cycle PWM in the radiation parameter table
The value of Duty Cycle, and it is loaded into the radiation parameter table after adjustment.
6. fan rotation speed control apparatus as claimed in claim 5, which is characterized in that the control module root
PWM Duty are obtained according to the value of the PWM Duty Cycle and the preset value of the PWM Duty Cycle
The process of the improved values of Cycle is：
The preset value of the value of the PWM Duty Cycle and the PWM Duty Cycle are subjected to subtraction meter
It calculates to obtain the improved values of PWM Duty Cycle.
7. fan rotation speed control apparatus as claimed in claim 5, which is characterized in that the setup unit is also
For making the PWM Duty Cycle that the value of PWM Duty Cycle is 50%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510909479.5A CN108302059B (en) | 2015-12-10 | 2015-12-10 | Fan rotating speed control method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510909479.5A CN108302059B (en) | 2015-12-10 | 2015-12-10 | Fan rotating speed control method and device |
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| Publication Number | Publication Date |
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| CN108302059A true CN108302059A (en) | 2018-07-20 |
| CN108302059B CN108302059B (en) | 2020-05-15 |
Family
ID=62870986
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510909479.5A Active CN108302059B (en) | 2015-12-10 | 2015-12-10 | Fan rotating speed control method and device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109656777A (en) * | 2018-11-20 | 2019-04-19 | 山东超越数控电子股份有限公司 | A kind of reducing fan noise regulation method, apparatus, terminal and storage medium |
| CN113534929A (en) * | 2021-06-30 | 2021-10-22 | 中国长城科技集团股份有限公司 | Server fan speed regulation method and device, terminal equipment and storage medium |
| US20230049456A1 (en) * | 2021-08-16 | 2023-02-16 | Anpec Electronics Corporation | Rotation locking system of motor of fan |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109656777A (en) * | 2018-11-20 | 2019-04-19 | 山东超越数控电子股份有限公司 | A kind of reducing fan noise regulation method, apparatus, terminal and storage medium |
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| US20230049456A1 (en) * | 2021-08-16 | 2023-02-16 | Anpec Electronics Corporation | Rotation locking system of motor of fan |
| US11761450B2 (en) * | 2021-08-16 | 2023-09-19 | Anpec Electronics Corporation | Rotation locking system of motor of fan |
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| Publication number | Publication date |
|---|---|
| CN108302059B (en) | 2020-05-15 |
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