CN101614217B - Method for controlling rotating speed of fan and main controller - Google Patents
Method for controlling rotating speed of fan and main controller Download PDFInfo
- Publication number
- CN101614217B CN101614217B CN2008101261785A CN200810126178A CN101614217B CN 101614217 B CN101614217 B CN 101614217B CN 2008101261785 A CN2008101261785 A CN 2008101261785A CN 200810126178 A CN200810126178 A CN 200810126178A CN 101614217 B CN101614217 B CN 101614217B
- Authority
- CN
- China
- Prior art keywords
- fan
- pwm signal
- dutycycle
- linear relationship
- rotation speed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
The invention discloses a method for controlling the rotating speed of a fan, comprising the following steps: sending pulse width modulation (PWM) signals with different duty ratios; receiving rotating speed pulse signals which correspond to the PWM signals with the different duty ratios; acquiring the rotating speed of the fan, which corresponds to the PWM signals with the different duty ratios, according to the rotating speed pulse signals; generating the linear relation of the duty ratios of the PWM signals and the rotating speed of the fan according to the PWM signals with the different duty ratios and the corresponding rotating speed of the fan; generating a PWM signal with the duty ratio corresponding to the needed rotating speed of the fan according to the generated linear relation, and sending the PWM signal to the fan to control the rotating speed of the fan. The invention also discloses a main controller which can accurately control the adaptive rotating speed of fans of different types.
Description
Technical field
The present invention relates to the fan control technology, relate in particular to a kind of fan rotational frequency control method and master controller.
Background technique
Along with development of electronic technology, the function of electronic equipment from strength to strength, this just needs to use more integrated-optic device, operating speed is electronic device faster.Though the manufacturing process of electronic device is greatly development, the power consumption of electronic device is also reducing gradually, and electronic device still can produce a large amount of heats in electronic equipment.Because the operating temperature of various electronic devices all has certain scope, surpassed this scope, the working state of electronic device will be unstable, even might burn electronic device, therefore, the heat dissipating state of electronic equipment can influence the stability and the Security of electronic device works.
In order to solve the heat dissipation problem of electronic equipment, in electronic equipment, fan dispels the heat also becomes the main radiating mode of electronic equipment to fan by a large amount of uses.But, because fan can produce certain power consumption and noise in the course of the work, therefore, present various industry standards to the more and more higher situation of the restrictive condition of the power consumption of electronic equipment and noise under, at the power consumption and the noise that guarantee to reduce under the fan heat dissipating state good premise fan, be one of effective way that reduces whole electric equipment power consumption and noise.
Pulsewidth modulation (PWM, Pulse Width Modulation) control type fan, be to use more a kind of fan at present, this fan is to realize rotating speed control by controller by the pwm signal that sends different duty, because the rotating speed of this fan can be controlled flexibly, thereby can be operated in designated state, avoid fan full speed running all the time, reduce the power consumption and the noise of electronic equipment effectively.
But in actual applications, for the fan of different fan manufacturer, owing to the difference that is provided with of fan Inter parameter, therefore, identical at fan work voltage, and under the identical situation of pwm signal of control rotation speed of the fan, the rotating speed that different fans produces can be inequality, even difference is bigger.For example, when adopting pwm signal control fan A running, output duty cycle is 0.25 pwm signal, and the rotating speed that fan A reaches is 500 rev/mins; When controlling the fan B of another model again, it has been generally acknowledged that also output duty cycle is that 0.25 pwm signal can make the rotating speed of fan B reach 500 rev/mins, but because the difference of the Inter parameter setting of fan B and fan A is bigger, the actual rotating speed that reaches of fan B then is 800 rev/mins.As can be seen, when adopting uniform pwm signal that the fan of different model is controlled, can't realize accurate control to the rotation speed of the fan of various different models.
Because the existence of the problems referred to above, also can't provide a kind of at present can accurately control the rotation speed of the fan of various different models to reach, thereby make troubles for the control of fan according to the adaptive method of carrying out rotating speed control of the fan of different model.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of fan rotational frequency control method and master controller, to realize carrying out rotating speed control accurately to the fan of various different models is adaptive.
For achieving the above object, technological scheme of the present invention is achieved in that
The invention provides a kind of fan rotational frequency control method, comprising:
Send the pwm signal of different duty to fan;
Reception is from described fan and the corresponding rotational speed pulse signal of pwm signal each dutycycle;
Obtain and the corresponding rotation speed of the fan of the pwm signal of described each dutycycle according to described rotational speed pulse signal;
According to the pwm signal of described each dutycycle and corresponding rotation speed of the fan, generate the dutycycle of pwm signal and the linear relationship of rotation speed of the fan;
Pwm signal according to described linear relationship generation and required rotation speed of the fan duty ratio corresponding size sends to described fan, and the rotating speed of described fan is controlled.
Described before the pwm signal of fan transmission different duty, this method also comprises: when described fan powers on, to described fan output high level, control described fan and reach the steady-working state that rotates at full speed.
After the dutycycle of described generation pwm signal and the linear relationship of rotation speed of the fan, this method also comprises: the accuracy to described linear relationship is verified;
Then when described accuracy is proved to be successful,, the rotating speed of described fan is controlled according to the pwm signal of the described linear relationship generation that is proved to be successful with required rotation speed of the fan duty ratio corresponding size; In described accuracy authentication failed, and the number of times of described authentication failed is judged the unstable working condition of described fan, and is controlled described fan and rotate at full speed when surpassing pre-determined number.
Described accuracy to linear relationship is verified specifically and is comprised:
Send the pwm signal of any dutycycle to described fan, and, obtain the corresponding rotation speed of the fan of pwm signal with any dutycycle that is sent according to the rotational speed pulse signal that described fan returns;
In the described linear relationship of dutycycle substitution with the pwm signal of any dutycycle of being sent, obtain the corresponding rotation speed of the fan of dutycycle with the pwm signal of described any dutycycle;
The rotation speed of the fan that rotational speed pulse signal obtained that will return according to described fan compares with the rotation speed of the fan that obtains according to described linear relationship, if both gaps, judge then that the accuracy of described linear relationship is proved to be successful less than predetermined value; Otherwise, judge the accuracy authentication failed of described linear relationship.
The present invention also provides a kind of master controller, comprising:
Signal transmitting module is used for the pwm signal to fan transmission different duty;
Signal receiving module is used to receive from described fan and the corresponding rotational speed pulse signal of pwm signal each dutycycle;
The rotation speed of the fan acquisition module is used for obtaining and the corresponding rotation speed of the fan of the pwm signal of described each dutycycle according to described rotational speed pulse signal;
The linear relationship generation module is used for according to the pwm signal of described each dutycycle and corresponding rotation speed of the fan, generates the linear relationship of dutycycle and rotation speed of the fan;
Rotational speed control module is used for according to the pwm signal of described linear relationship generation with required rotation speed of the fan duty ratio corresponding size the rotating speed of described fan being controlled.
Described master controller also comprises the linear relationship authentication module, is used for the accuracy of described linear relationship is verified.
Described linear relationship authentication module further comprises:
First rotating speed obtains submodule, is used for sending to described fan the pwm signal of any dutycycle, and according to the rotational speed pulse signal that described fan returns, obtains the corresponding rotation speed of the fan of pwm signal with any dutycycle that is sent;
Second rotating speed obtains submodule, is used for the described linear relationship of dutycycle substitution of the pwm signal of any dutycycle that will be sent, obtains the corresponding rotation speed of the fan of dutycycle with the pwm signal of described any dutycycle;
Decision sub-module, be used for described first rotating speed is obtained the rotation speed of the fan that submodule obtains, obtain the rotation speed of the fan that submodule obtains with described second rotating speed and compare, and whether judge the whether success of accuracy checking of described linear relationship according to both gaps less than the comparative result of predetermined value.
Described linear relationship authentication module further comprises: the failure processing sub is used for judging the unstable working condition of described fan, and controlling described fan and rotate at full speed when the number of times of described decision sub-module authentication failed surpasses pre-determined number.
Fan rotational frequency control method provided by the present invention and master controller by send the pwm signal of different duty to fan, obtain and the corresponding rotation speed of the fan of the pwm signal of each dutycycle; And, generate the dutycycle of pwm signal and the linear relationship of rotation speed of the fan according to the pwm signal of each dutycycle and corresponding rotation speed of the fan; Linear relationship that utilization obtains produces the pwm signal with required rotation speed of the fan duty ratio corresponding size, realizes carrying out rotating speed control accurately to the fan of various different models is adaptive, brings convenience for the control operation of fan.The present invention adopts and the flexible control of the corresponding different linear relationships realizations of the fan of various different models to rotation speed of the fan, can effectively reduce the power consumption and the noise of fan; And can avoid owing to rotation speed of the fan is crossed the low too high phenomenon of temperature that causes, improve the stability of electronic device works.
Description of drawings
Fig. 1 is the flow chart of a kind of fan rotational frequency control method of the present invention;
Fig. 2 is the flow chart of the fan rotational frequency control method of the embodiment of the invention;
Fig. 3 is the composition structural representation of a kind of master controller of the present invention.
Embodiment
The technical solution of the present invention is further elaborated below in conjunction with the drawings and specific embodiments.
A kind of fan rotational frequency control method provided by the invention as shown in Figure 1, mainly may further comprise the steps:
Step 101, controller send the pwm signal of different duty to fan.
So-called dutycycle promptly is meant high level shared time ratio in one-period, and for example: the cycle of signal is T, and the high level time in each cycle is t
1, low level time is t
2, T=t
1+ t
2, then dutycycle is t
1/ T; As can be seen, the span of dutycycle is 0～1.Industry is known, and the rotating speed of fan and the dutycycle of pwm signal are linear relationships, represent rotation speed of the fan with N among the present invention, and D represents the dutycycle of pwm signal, and then the linear relationship of N and D can be expressed as:
N＝kD+b (1)
K in the above-mentioned formula and b are constant, and the span of D is 0～1, and controller sends the dutycycle D difference of pwm signal to fan, and corresponding rotation speed of the fan N is also inequality.
In actual applications, the fan of the different model of producing for different fan manufacturer since the fan Inter parameter difference is set, therefore, for the fan of different model, the linear relationship of its N and D is also inequality.Specifically, be exactly fan for different model, k in the linear relationship of its N and D and the value of b are inequality.
Purpose of the present invention is exactly the linear relationship for N that obtains each fan correspondence and D, and utilize the linear relationship obtain, calculate corresponding D according to the required N of reality, give fan by the pwm signal of exporting corresponding D value size, the rotating speed of fan is adjusted to N, thereby realize accurate control rotation speed of the fan.
In order to obtain the linear relationship of N and D, key is the value that will obtain k and b, if will obtain the value of k and b, needs the N and the D of two groups of reality at least; Therefore, in step 101, controller need be sent to the pwm signal of few two different duty to fan.
Step 102, controller receive from fan and the corresponding rotational speed pulse signal of pwm signal each dutycycle.
After fan receives the pwm signal of self-controller, rotate with suitable rotating speed, and return corresponding rotational speed pulse signal to controller according to pwm signal.
Step 103, controller obtains and the corresponding rotation speed of the fan of the pwm signal of each dutycycle according to rotational speed pulse signal.
Known, fan whenever turns around, and can produce two rotational speed pulse signals, represents to produce the cycle of rotational speed pulse signal among the present invention with T, and the unit of T is second, then can obtain rotation speed of the fan N=1/2T or N=60/2T according to T.During corresponding N=1/2T, the unit of N is revolutions per second, and during corresponding N=60/2T, the unit of N is rev/min.
Step 104, controller generate the dutycycle of pwm signal and the linear relationship of rotation speed of the fan according to the pwm signal of each dutycycle and corresponding rotation speed of the fan.
In controller the formula (1) that different D is above-mentioned with corresponding N substitution, can be in the hope of the value of constant k and b, thus obtain the N of formula (1) representative and the linear relationship of D.
Step 105, controller produces according to linear relationship and the pwm signal of required rotation speed of the fan duty ratio corresponding size sends to fan, and the rotating speed of fan is controlled.
After the linear relationship that obtains N and D, controller promptly can be controlled the rotating speed of fan according to linear relationship.For example: the rotating speed of fan need be adjusted to N
xThe time, only need be with N
xTry to achieve corresponding N in the substitution linear relationship
xD
x, and by exporting D to fan
xThe pwm signal of size, thus the control fan is at N
xDown running of rotating speed.
Below in conjunction with specific embodiment above-mentioned fan rotational frequency control method is further elaborated, as shown in Figure 2, the fan rotational frequency control method of the embodiment of the invention mainly may further comprise the steps:
When fan just begins to work on power, fan state of rest from the beginning, reaching stable to rotating speed needs the regular hour.Therefore, when controller just begins to work on power at fan, export one second high level pwm signal give fan, make fan reach the steady-working state of maximum speed; In the time in this second, fan can be to controller re-entry speed pulse signal; The computation of Period of the rotational speed pulse signal that controller can return according to fan obtains the maximum speed of fan.For example: the period T of the rotational speed pulse signal that fan returns is 0.05 second, then calculates the maximum speed N of fan
Max=60/0.1=600 rev/min, the N of controller to obtaining
MaxStore.
For example: controller is to fan output duty cycle D
1When being 0.25 pwm signal, the period T of the rotational speed pulse signal that fan returns
1Be 0.1 second, then calculate and D
1It is 0.25 the corresponding rotational speed N of pwm signal
1=60/0.2=300 rev/min, controller is to D
1And corresponding N
1Store.
For example: controller is to fan output duty cycle D
2When being 0.5 pwm signal, the period T of the rotational speed pulse signal that fan returns
2Be 0.075 second, then calculate and D
2It is 0.5 the corresponding rotational speed N of pwm signal
2=60/0.15=400 rev/min, controller is to D
2And corresponding N
2Store.
Step 204 is according to N
1And D
1, and N
2And D
2Obtain the linear relationship of N and D.
With N
1And D
1, and N
2And D
2In the substitution formula (1), obtain following two formulas respectively:
300＝0.25k+b (2)
400＝0.5k+b (3)
Can calculate k=400 according to above-mentioned two formulas, b=200, thus the linear relationship that obtains N and D is:
N＝400D+200 (4)
For example: controller is to fan output duty cycle D
3When being 0.75 pwm signal, the period T of the rotational speed pulse signal that fan returns
3Be 0.0625 second, then calculate and D
3It is 0.75 the corresponding rotational speed N of pwm signal
3=60/0.125=500 rev/min, controller is to D
3And corresponding N
3Store.
For example: controller is with D
3=0.75 substitution formula (4) calculates N
3If, the N that calculates
3=500 rev/mins, judge that then the accuracy to linear relationship is proved to be successful, and continue execution in step 207; If the N that calculates
3≠ 500, then judge accuracy authentication failed, and return step 201 and re-execute whole flow processs linear relationship.
In addition, owing to can have error in the practical operation, therefore, the present invention also can be at D
3The N that substitution formula (4) calculates
3And the gap between 500 rev/mins judges that the accuracy to linear relationship is proved to be successful during less than predetermined value; At D
3The N that substitution formula (4) calculates
3And the gap between 500 rev/mins is judged the accuracy authentication failed to linear relationship during greater than predetermined value.
For convenience, can also utilize the N that obtains in the step 201
MaxLinear relationship shown in the formula (4) is verified, relatively N
MaxWhether equate that with the maximum occurrences of N in the formula (4) perhaps gap is less than predetermined value, if equate that perhaps gap judges then that less than predetermined value the accuracy to linear relationship is proved to be successful; Otherwise, judge accuracy authentication failed to linear relationship.
For example: in the time the rotating speed of fan need being adjusted to 450 rev/mins, will calculate corresponding D=0.625 in the N=450 rev/min of substitution formula (4), controller can be adjusted to 450 rev/mins with the rotating speed of fan to the pwm signal of fan transmission D=0.625.
In addition, in the practical application, there are a kind of special circumstances among the embodiment shown in Figure 2, repeat repeatedly the flow process of above-mentioned steps 201 exactly, can't the accuracy of linear relationship be proved to be successful all the time to step 206.For this situation, processing mode of the present invention is: when the number of times of authentication failed surpasses pre-determined number, judge the unstable working condition of fan, abandon utilizing the linear relationship of authentication failed to carry out the rotating speed control of fan, and full speed is arrived in fan control rotate, allow fan rotate at full speed all the time.
For realizing above-mentioned fan rotational frequency control method, it is a kind of in order to realize the master controller of rotation speed of the fan control that the present invention also provides, as shown in Figure 3, this master controller comprises: signal transmitting module 10, signal receiving module 20, rotation speed of the fan acquisition module 30, linear relationship generation module 40 and rotational speed control module 50.Wherein, signal transmitting module 10 is used for the pwm signal to fan transmission different duty.Signal receiving module 20 links to each other with signal transmitting module 10, is used to receive from fan and the corresponding rotational speed pulse signal of pwm signal each dutycycle.Rotation speed of the fan acquisition module 30 links to each other with signal receiving module 20, is used for obtaining and the corresponding rotation speed of the fan of the pwm signal of each dutycycle according to rotational speed pulse signal.Linear relationship generation module 40 links to each other with rotation speed of the fan acquisition module 30, is used for according to the pwm signal of each dutycycle and corresponding rotation speed of the fan, generates the linear relationship of dutycycle and rotation speed of the fan.Rotational speed control module 50 links to each other with linear relationship generation module 40, is used for according to the pwm signal of linear relationship generation with required rotation speed of the fan duty ratio corresponding size the rotating speed of fan being controlled.
Master controller of the present invention is at the basic above-mentioned linear relationship authentication module 60 that comprises of above-mentioned module, link to each other with rotational speed control module 50 with linear relationship generation module 40, be used for the accuracy of the linear relationship that generates is verified, and the linear relationship that is proved to be successful is offered rotational speed control module 50.Wherein, linear relationship authentication module 60 further comprises: first rotating speed obtains submodule 61, second rotating speed obtains submodule 62, decision sub-module 63 and failure processing sub 64.First rotating speed obtains submodule 61, is used for sending to fan the pwm signal of any dutycycle, and according to the rotational speed pulse signal that fan returns, obtains the corresponding rotation speed of the fan of pwm signal with any dutycycle that is sent.Second rotating speed obtains submodule 62, is used for the dutycycle substitution linear relationship of the pwm signal that will be sent, obtains and the corresponding rotation speed of the fan of dutycycle.Decision sub-module 63, be used for first rotating speed is obtained the rotation speed of the fan that submodule 61 obtains, obtain the rotation speed of the fan that submodule 62 obtains with second rotating speed and compare, and whether judge less than the comparative result of predetermined value whether linear relationship is verified by accuracy according to both gaps.Failure processing sub 64 links to each other with decision sub-module 63, be used for judging the unstable working condition of fan when the number of times of decision sub-module 63 authentication faileds surpasses pre-determined number, and the control fan rotates at full speed.
The present invention is according to the fan of different model, generates the linear relationship corresponding respectively with each fan, and the linear relationship of utilizing generation carries out adaptive accurate control to the rotation speed of the fan of various different models, brings convenience to the control operation of fan.The present invention adopts and the flexible control of the corresponding different linear relationships realizations of the fan of various different models to rotation speed of the fan, can effectively reduce the power consumption and the noise of fan; And can avoid owing to rotation speed of the fan is crossed the low too high phenomenon of temperature that causes, improve the stability of electronic device works.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (8)
1. a fan rotational frequency control method is characterized in that, comprising:
Send the pulse-width modulation PWM signal of different duty to fan;
Reception is from described fan and the corresponding rotational speed pulse signal of pwm signal each dutycycle;
Obtain and the corresponding rotation speed of the fan of the pwm signal of described each dutycycle according to described rotational speed pulse signal;
According to the pwm signal of described each dutycycle and corresponding rotation speed of the fan, generate the dutycycle of pwm signal and the linear relationship of rotation speed of the fan;
Pwm signal according to described linear relationship generation and required rotation speed of the fan duty ratio corresponding size sends to described fan, and the rotating speed of described fan is controlled.
2. according to the described fan rotational frequency control method of claim 1, it is characterized in that described before the pwm signal of fan transmission different duty, this method also comprises: when described fan powers on, to described fan output high level, control described fan and reach the steady-working state that rotates at full speed.
3. according to claim 1 or 2 described fan rotational frequency control methods, it is characterized in that after the dutycycle of described generation pwm signal and the linear relationship of rotation speed of the fan, this method also comprises: the accuracy to described linear relationship is verified;
Then when described accuracy is proved to be successful,, the rotating speed of described fan is controlled according to the pwm signal of the described linear relationship generation that is proved to be successful with required rotation speed of the fan duty ratio corresponding size; In described accuracy authentication failed, and the number of times of described authentication failed is judged the unstable working condition of described fan, and is controlled described fan and rotate at full speed when surpassing pre-determined number.
4. according to the described fan rotational frequency control method of claim 3, it is characterized in that described accuracy to linear relationship is verified specifically and comprised:
Send the pwm signal of any dutycycle to described fan, and, obtain the corresponding rotation speed of the fan of pwm signal with any dutycycle that is sent according to the rotational speed pulse signal that described fan returns;
In the described linear relationship of dutycycle substitution with the pwm signal of any dutycycle of being sent, obtain the corresponding rotation speed of the fan of dutycycle with the pwm signal of described any dutycycle;
The rotation speed of the fan that rotational speed pulse signal obtained that will return according to described fan compares with the rotation speed of the fan that obtains according to described linear relationship, if both gaps, judge then that the accuracy of described linear relationship is proved to be successful less than predetermined value; Otherwise, judge the accuracy authentication failed of described linear relationship.
5. a master controller is characterized in that, comprising:
Signal transmitting module is used for the pwm signal to fan transmission different duty;
Signal receiving module is used to receive from described fan and the corresponding rotational speed pulse signal of pwm signal each dutycycle;
The rotation speed of the fan acquisition module is used for obtaining and the corresponding rotation speed of the fan of the pwm signal of described each dutycycle according to described rotational speed pulse signal;
The linear relationship generation module is used for according to the pwm signal of described each dutycycle and corresponding rotation speed of the fan, generates the linear relationship of dutycycle and rotation speed of the fan;
Rotational speed control module is used for according to the pwm signal of described linear relationship generation with required rotation speed of the fan duty ratio corresponding size the rotating speed of described fan being controlled.
6. according to the described master controller of claim 5, it is characterized in that described master controller also comprises the linear relationship authentication module, be used for the accuracy of described linear relationship is verified.
7. according to the described master controller of claim 6, it is characterized in that described linear relationship authentication module further comprises:
First rotating speed obtains submodule, is used for sending to described fan the pwm signal of any dutycycle, and according to the rotational speed pulse signal that described fan returns, obtains the corresponding rotation speed of the fan of pwm signal with any dutycycle that is sent;
Second rotating speed obtains submodule, is used for the described linear relationship of dutycycle substitution of the pwm signal of any dutycycle that will be sent, obtains the corresponding rotation speed of the fan of dutycycle with the pwm signal of described any dutycycle;
Decision sub-module, be used for described first rotating speed is obtained the rotation speed of the fan that submodule obtains, obtain the rotation speed of the fan that submodule obtains with described second rotating speed and compare, and whether judge the whether success of accuracy checking of described linear relationship according to both gaps less than the comparative result of predetermined value.
8. according to the described master controller of claim 7, it is characterized in that, described linear relationship authentication module further comprises: the failure processing sub, be used for when the number of times of described decision sub-module authentication failed surpasses pre-determined number, judge the unstable working condition of described fan, and control described fan and rotate at full speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101261785A CN101614217B (en) | 2008-06-27 | 2008-06-27 | Method for controlling rotating speed of fan and main controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101261785A CN101614217B (en) | 2008-06-27 | 2008-06-27 | Method for controlling rotating speed of fan and main controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101614217A CN101614217A (en) | 2009-12-30 |
| CN101614217B true CN101614217B (en) | 2011-11-30 |
Family
ID=41494052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101261785A Active CN101614217B (en) | 2008-06-27 | 2008-06-27 | Method for controlling rotating speed of fan and main controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101614217B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101761497A (en) * | 2010-01-14 | 2010-06-30 | 杭州六易科技有限公司 | Electric fan with microcomputer for automatically controlling wind rate |
| CN102748312B (en) * | 2011-04-21 | 2015-02-11 | 赛恩倍吉科技顾问（深圳）有限公司 | Control device for rotating speed of fan |
| CN102220996B (en) * | 2011-06-21 | 2017-07-07 | 中兴通讯股份有限公司 | The fan speed-governing method and device decoupled with software version |
| CN103511306A (en) * | 2012-06-18 | 2014-01-15 | 光宝电子(广州)有限公司 | Fan model detection method, fan control method and control circuit and device |
| CN105388981A (en) * | 2015-11-27 | 2016-03-09 | 浪潮电子信息产业股份有限公司 | Server power supply fan control method and fan controller |
| CN107179815B (en) * | 2016-03-09 | 2021-01-29 | 华为技术有限公司 | Air cooling system and method for controlling fan in air cooling system |
| CN106989045A (en) * | 2017-06-09 | 2017-07-28 | 郑州云海信息技术有限公司 | A kind of data center's water cooling unit cabinet PWM control methods |
| CN107503968B (en) * | 2017-09-22 | 2019-05-24 | 安徽皖通邮电股份有限公司 | A kind of temperature self-adaptation fan control device |
| CN111536068B (en) * | 2020-05-12 | 2022-07-08 | 潍坊歌尔电子有限公司 | Fan rotating speed control method and device and head-mounted equipment |
| CN117916469A (en) * | 2022-09-06 | 2024-04-19 | 新华三人工智能科技有限公司 | Fan rotating speed control method, device and equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1657787A (en) * | 2004-02-21 | 2005-08-24 | 华为技术有限公司 | Method and device for control speed of fan |
| CN1741364A (en) * | 2004-08-23 | 2006-03-01 | 台达电子工业股份有限公司 | A linear speed control circuit for fan motor |
| CN1949117A (en) * | 2005-10-11 | 2007-04-18 | 鸿富锦精密工业（深圳）有限公司 | Fan speed controlling system and method |
-
2008
- 2008-06-27 CN CN2008101261785A patent/CN101614217B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1657787A (en) * | 2004-02-21 | 2005-08-24 | 华为技术有限公司 | Method and device for control speed of fan |
| CN1741364A (en) * | 2004-08-23 | 2006-03-01 | 台达电子工业股份有限公司 | A linear speed control circuit for fan motor |
| CN1949117A (en) * | 2005-10-11 | 2007-04-18 | 鸿富锦精密工业（深圳）有限公司 | Fan speed controlling system and method |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2007-65871A 2007.03.15 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101614217A (en) | 2009-12-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101614217B (en) | Method for controlling rotating speed of fan and main controller | |
| US11539313B2 (en) | System and method of synchronizing a switching signal | |
| CN1307783C (en) | Motor control system | |
| US8558490B2 (en) | Estimation of actual torque in an electrical motor drive | |
| CN105673540B (en) | The rotation speed regulating method of fan, the adjustment of rotational speed system of device and fan | |
| US8092611B2 (en) | Method and system for dishwasher operation | |
| CN102214930B (en) | Method of controling a wind turbine generator | |
| US8106610B2 (en) | Heat dissipation device and fan module thereof | |
| EP3543533B1 (en) | Control system and control method | |
| CN109826822B (en) | A kind of fan control method and related device | |
| CN116455368A (en) | PWM signal generation circuit and output control method | |
| US11600170B2 (en) | Fan system and fan driving method | |
| CN101923008B (en) | Test bench control system of heat radiator and method thereof | |
| CN109882432A (en) | A kind of fan wind speed control method, system, device and readable storage medium storing program for executing | |
| CN108073103B (en) | Communication control system | |
| CN112152612B (en) | Method, device, system, vehicle and storage medium for synchronizing control signals | |
| CN204517709U (en) | A kind of drive unit of DC brushless motor and drive system thereof | |
| WO2017140090A1 (en) | Method for adjusting radio-frequency power, zigbee router, sensor and system | |
| CN109815713B (en) | Encryption method based on engineering machinery electrical system | |
| US6476577B1 (en) | Motor control circuit | |
| CN105007075A (en) | Method for adjusting frequency and phases of clock | |
| CN114876839B (en) | Fan system and fan driving method | |
| CN108390599A (en) | A kind of insulator climbing robot multijaw driving motor synchronous control system and method | |
| CN105258721A (en) | Spherical detection device and motor driving method | |
| CN114857059B (en) | Fan system and fan driving method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |