CN109083857A - A kind of server fan rotating speed control method and device - Google Patents
A kind of server fan rotating speed control method and device Download PDFInfo
- Publication number
- CN109083857A CN109083857A CN201810885021.4A CN201810885021A CN109083857A CN 109083857 A CN109083857 A CN 109083857A CN 201810885021 A CN201810885021 A CN 201810885021A CN 109083857 A CN109083857 A CN 109083857A
- Authority
- CN
- China
- Prior art keywords
- fan
- speed
- server
- module
- rotating 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/20—Cooling means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2270/00—Control
- F05D2270/30—Control parameters, e.g. input parameters
- F05D2270/303—Temperature
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Mechanical Engineering (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
The invention proposes a kind of server fan rotating speed control method and device, in control of the server to fan, different control frequencies is used for multiple fans, so that the vibration point and noise spot of each fan are in different frequencies, in addition revolving speed is no longer secured in same rotating speed, but the base speed and current most high speed for meeting radiating requirements are calculated according to the sampled value of temperature collecting module, pass through the control of server, adjust multiple fans dynamically within the scope of minimum speed and maximum speed, and time when each fan being made to reach maximum speed is different, it can effectively reduction noise, and avoid the appearance of covibration.On hardware, change the mode that an original signal controls multiple fans, corresponding each fan has an independent control signal, if avoiding the driving end failure of fan, the case where all fans cannot all be run, enhances the stability of system.
Description
Technical field
The present invention relates to server radiating technical field, a kind of server fan rotating speed control method and dress are specifically provided
It sets.
Background technique
With the continuous development of cybertimes, server has been widely applied and has been goed deep among the production and living of people.
And for server, heat sinking function is normally the primary condition for ensureing server and running well.
There are many components that there is very high heat dissipation power consumption in current server, in order to ensure the normal fortune of server
Row, reliable and effective cooling measure are necessary.It is current server either universal class or RACK type, all adopt
With the mode of fan cooling, the power consumption that radiates is bigger, and the scheme that may be taken is exactly to choose more powerful fan or increase wind
The quantity of fan.In the prior art, using common pwm control signal, multiple fan operations on a same frequency, be easy to cause shake
Dynamic and noise frequency Multiple Superposition.The problem of driving end of one fan is if there is hardware will affect total PWM control
Signal, to influence the control of other fans.Since fan can generate vibration and noise in the process of running, especially vibration meeting
The performance of server is seriously affected, it is sometimes serious to will lead to server delay machine etc..Therefore, in order to which server can be transported reliably
It goes, the noise and vibration problems generated in fan operational process is urgent need to resolve.
Summary of the invention
For disadvantage mentioned above, the invention proposes a kind of server fan rotating speed control method and device, can be effective
Reduce the running noise of fan and vibration.
The embodiment of the invention provides a kind of server fan rotating speed control method, the methods, comprising the following steps:
Obtain server temperature；
The minimum speed and maximum speed for meeting N number of fan of radiating requirements are calculated according to the server temperature of acquisition；
Set the minimum speed and maximum speed of N number of fan；
The current rotating speed for obtaining N number of fan successively issues N number of pulse letter of PWM1 to PWMN by Fixed Time Interval
Number, fan PID is adjusted, adjusts N number of fan dynamically between the minimum speed of radiating requirements and maximum speed meeting respectively.
Pulse width modulates (PWM), the abbreviation of Pulse Width Modulation, abbreviation pulsewidth modulation, is using micro-
The numeral output of processor is come a kind of very effective technology for being controlled analog circuit.
Further, the server temperature of the acquisition calculates the minimum speed and most for meeting N number of fan of radiating requirements
High-revolving method is:
The minimum speed=base rpm * (1-K)；
The maximum speed=base rpm * (1+K)；
The base rpm is that server is to meet radiating requirements, and N number of fan is under same frequency with the variation of temperature
The revolving speed of linear regulation.
The K is the float factor of basic revolving speed, 0 K≤0.3 <.
Further, the current rotating speed for obtaining N number of fan, PWM1 is successively issued by Fixed Time Interval to PWMN
N number of pulse signal, to fan PID adjust, meeting N number of fan between the minimum speed of radiating requirements and maximum speed respectively
The method of dynamic adjustment is:
N number of different chopping frequency is successively issued by Fixed Time Interval, fan PID is adjusted, and distinguishes N number of fan
It is dynamically adjusted between the minimum speed of radiating requirements and maximum speed meeting.
Further, the method further includes the current rotating speed of Real-time Feedback fan.
The embodiment of the invention provides a kind of server fan rotating speed control device, the devices, comprising:
Temperature collecting module: for obtaining server temperature；
BMC module: for controlling rotation speed of the fan calculating and rotation speed of the fan；
Blower module: N number of fan of the acceptable frequency control in 10KHZ-25KHZ.
Further, the BMC module includes:
Rotation speed of the fan calculates module: for calculating the minimum speed and maximum speed that meet the N number of fan of radiating requirements；
Rotation speed of the fan control module: for successively issuing the N number of of PWM1 to PWMN by fixed interval to N number of fan
Pulse signal adjusts fan PID, and N number of fan is made to meet dynamic between the minimum speed of radiating requirements and maximum speed respectively
Adjustment, while the revolving speed of N number of fan is obtained, it feeds back to rotation speed of the fan and calculates module.
Further, the rotation speed of the fan control module, comprising:
Fan signal control module: for issuing independent pwm control signal to N number of fan；
Signal feedback module: it for obtaining the revolving speed of N number of fan, feeds back to rotation speed of the fan and calculates module.
The effect provided in summary of the invention is only the effect of embodiment, rather than invents all whole effects, above-mentioned
A technical solution in technical solution have the following advantages that or the utility model has the advantages that
The invention proposes a kind of server fan rotating speed control method and device, in control of the server to fan,
Different control frequencies is used for multiple fans, so that the vibration point and noise spot of each fan are in different frequencies
In rate, avoid in the prior art using common pwm control signal, multiple fan operations on a same frequency, be easy to cause shake
Dynamic and noise frequency Multiple Superposition.In addition revolving speed is no longer secured in same rotating speed, but according to temperature collecting module
Sampled value calculates the base speed for meeting radiating requirements and current most high speed makes multiple fans in base by the control of server
Speed --- dynamic adjusts within the scope of current most high speed, and makes time when each fan arrival maximum speed different.It can be with
Effectively reduction noise, and avoid the appearance of covibration.
On hardware, change the mode that an original signal controls multiple fans, corresponding each fan have one it is independent
Signal is controlled, the problem of driving end of fan is if there is hardware is avoided, will affect total pwm control signal, to influence
The control of other fans.The driving end of a fan is broken down in the present invention, only be will affect the operation of this fan, is not influenced it
The normal operation of his fan.In addition the driving end of fan is if there is failure, can Real-time Feedback to server, have be directed to it
Inspection and maintenance is effectively increased the stability of system.
Detailed description of the invention
Fig. 1 is a kind of flow chart of server fan rotating speed control method provided by the embodiment of the present application 1；
Fig. 2 is a kind of structural block diagram of server fan rotating speed control device provided by the embodiment of the present application 1；
Fig. 3 be flow chart and structural framing figure based on the embodiment of the present application 1, the noise situations that the present invention generates with it is existing
Technology generates noise situations comparison diagram.
Specific embodiment
In order to clarify the technical characteristics of the invention, below by specific embodiment, and its attached drawing is combined, to this hair
It is bright to be described in detail.Following disclosure provides many different embodiments or example is used to realize different knots of the invention
Structure.In order to simplify disclosure of the invention, hereinafter the component of specific examples and setting are described.In addition, the present invention can be with
Repeat reference numerals and/or letter in different examples.This repetition is that for purposes of simplicity and clarity, itself is not indicated
Relationship between various embodiments and/or setting is discussed.It should be noted that illustrated component is not necessarily to scale in the accompanying drawings
It draws.Present invention omits the descriptions to known assemblies and treatment technology and process to avoid the present invention is unnecessarily limiting.
Embodiment 1
The embodiment of the present invention 1 provides a kind of server fan rotating speed control method flow chart as shown in Figure 1:.The clothes
The fan of business device is 4, controls FAN1 using the pwm signal of 10KHZ, controls FAN2 using the pwm signal of 15KHZ, uses
The pwm signal of 20KHZ controls FAN3, controls FAN5 using the pwm signal of 25KHZ.But of the invention is not limited to 4 fans,
It can also be other quantity, it is wider for the control acceptable range of signal PWM in fan design, it can be in 10KHZ-
Any frequency between 25KHZ.
A kind of each step of server fan rotating speed control method is explained presently in connection with shown in Fig. 1.
In step s 11, the process is started to process.
In step s 12, the real time temperature of acquisition server.
In step s 13, according to collected server real time temperature, the minimum speed for meeting the exothermic temperature is calculated
And maximum speed.
The calculation method of minimum speed and maximum speed is to adjust to obtain on the base rpm of the prior art in the present invention
's.In the prior art, all fans have the control of frequency signal, fan work in identical revolving speed, the revolving speed of fan with
The linear adjusting of variation of temperature, temperature increase revolving speed and then rise, temperature decline revolving speed then declines.
Base rpm server is to meet radiating requirements, 4 fans changing linearly with temperature under same frequency
The revolving speed of adjusting.
K takes 0.2 in the present embodiment, and the K that is not limited to of the invention takes 0.2, other numerical value can also be arranged.
Minimum speed=base rpm * 0.8 in the present embodiment,
Maximum speed=base rpm * 1.2.
In step S14, the minimum speed and maximum speed of 4 fans is set separately.
In step S15, the real-time revolving speed of FAN1 is obtained, and gives server velocity feedback.Pass through the copped wave frequency of 10KHZ
Rate signal PWM1 adjusts fan PID, adjusts FAN1 dynamically between the minimum speed of radiating requirements and maximum speed meeting.
It in step s 16, is after executing the step S15, be delayed 2S, then executes step S16.Obtain the real-time of FAN2
Revolving speed, and server is given velocity feedback.Fan PID is adjusted by the chopping frequency signal PWM2 of 15KHZ, makes FAN2 full
It is dynamically adjusted between the minimum speed and maximum speed of sufficient radiating requirements.
It is after executing the step S16, be delayed 2S, then executes step S17 in step S17.Obtain the real-time of FAN3
Revolving speed, and server is given velocity feedback.Fan PID is adjusted by the chopping frequency signal PWM3 of 20KHZ, makes FAN3 full
It is dynamically adjusted between the minimum speed and maximum speed of sufficient radiating requirements.
It is after executing the step S17, be delayed 2S, then executes step S18 in step S18.Obtain the real-time of FAN4
Revolving speed, and server is given velocity feedback.Fan PID is adjusted by the chopping frequency signal PWM4 of 25KHZ, makes FAN4 full
It is dynamically adjusted between the minimum speed and maximum speed of sufficient radiating requirements.
As shown in Fig. 2, being directed to the method flow diagram of the embodiment of the present invention 1, a kind of server fan rotating speed control is additionally provided
The structural block diagram of device processed.
Temperature collecting module uses temperature sensor acquisition server temperature in the present embodiment for obtaining server temperature
Degree.
BMC module: for controlling rotation speed of the fan calculating and rotation speed of the fan.BMC module includes that rotation speed of the fan calculates module
With rotation speed of the fan control module.Wherein, rotation speed of the fan calculates module for calculating the minimum speed for meeting 4 fans of radiating requirements
And maximum speed.Rotation speed of the fan control module issues the chopping frequency pwm pulse signal of 10KHZ to first fan first, leads to
Then chopping frequency PWM2 pulse signal that fixed interval 2S issues from 15KHZ to second fan is crossed, then by between fixation
The chopping frequency PWM3 pulse signal for then issuing 20KHZ to third fan every time 2S, finally by fixed interval
Then 2S issues the chopping frequency PWM4 pulse signal of 25KHZ to the 4th fan, adjust to fan PID, makes 4 fan difference
It is dynamically adjusted between the minimum speed of radiating requirements and maximum speed meeting, while obtaining the revolving speed of 4 fans, feed back to fan
Revolving speed computing module.In addition rotation speed of the fan control module includes fan signal control module: independent for issuing to 4 fans
Pwm control signal；Signal feedback module: it for obtaining the revolving speed of 4 fans, feeds back to rotation speed of the fan and calculates module.
Blower module: 4 fans of the acceptable frequency control in 10KHZ-25KHZ.
It is as shown in Figure 3: to be dropped in order to which a kind of server fan rotating speed control method and device of the present invention are understood more intuitively
Effect on low server noise and vibration, provides flow chart and structural framing figure based on the embodiment of the present application 1, and the present invention produces
Raw noise situations and the prior art generate noise situations comparison diagram.In the prior art, 4 fan works are in identical frequency,
Revolving speed S having the same.The schematic diagram of the noise of generation is straight line, by Fig. 3 it is not difficult to find out that the work of 4 desk fans is in same frequency
Rate, the phenomenon that be easy to causeing the Multiple Superposition of vibration and noise frequency, or even resonate.In addition on hardware, work as fan
Driving break down, all fans can not all work.
The revolving speed of 4 desk fans dynamically adjusts between minimum speed 0.8S and maximum speed 1.2S in the present invention.Fan
Revolving speed schematic diagram is a tracks of line voltage, and the time that 4 fans reach maximum speed is not identical, so that each fan
Vibration point and noise spot be in different frequencies.Thus reach when reducing multiple fans and being operated together, noise and vibration
Bigger problem, and can reasonably avoid covibration.In addition on hardware, 4 fans have oneself independent respectively
Signal is controlled, the driving of a fan is broken down, and be will not influence other fan and is operated normally.In addition server can receive at any time
The feedback signal of rotation speed of the fan, the convenient fan to failure carry out examination and maintenance, enhance the stability of system.
Although specification and drawings and examples have been carried out detailed description to the invention, this field skill
Art personnel should be appreciated that and still can be modified or replaced equivalently to the invention；And all do not depart from wound of the present invention
The technical solution and its improvement for the spirit and scope made, are encompassed by the protection scope of the invention patent.
Claims (7)
1. a kind of server fan rotating speed control method, characterized in that include:
Obtain server temperature；
The minimum speed and maximum speed for meeting N number of fan of radiating requirements are calculated according to the server temperature of acquisition；
Set the minimum speed and maximum speed of N number of fan；
The current rotating speed for obtaining N number of fan successively issues N number of pulse signal of PMW1 to PMWN by Fixed Time Interval, right
Fan PID is adjusted, and adjusts N number of fan dynamically between the minimum speed of radiating requirements and maximum speed meeting respectively.
2. a kind of server fan rotating speed control method according to claim 1, the server temperature according to acquisition
Calculate the method for meeting the minimum speed and maximum speed of the N number of fan of radiating requirements, characterized in that include:
The minimum speed=base rpm * (1-K)；
The maximum speed=base rpm * (1+K)；
The base rpm is that server is to meet radiating requirements, and N number of fan is under same frequency as the variation of temperature is linear
Adjusting revolving speed；
The K is the float factor of basic revolving speed, 0 K≤0.3 <.
3. a kind of server fan rotating speed control method according to claim 1, the N number of fan of acquisition works as forward
Speed successively issues N number of pulse signal of PWM1 to PWMN by Fixed Time Interval, adjusts to fan PID, makes N number of fan point
The method dynamically adjusted between the minimum speed of radiating requirements and maximum speed is not being met, characterized in that include:
N number of different chopping frequency is successively issued by Fixed Time Interval, fan PID is adjusted, and makes N number of fan respectively full
It is dynamically adjusted between the minimum speed and maximum speed of sufficient radiating requirements.
4. according to claim 1 to a kind of server fan rotating speed control method described in 3 any one, characterized in that also wrap
It includes:
The current rotating speed of Real-time Feedback fan.
5. a kind of server fan rotating speed control device, characterized in that include:
Temperature collecting module: for obtaining server temperature；
BMC module: for controlling rotation speed of the fan calculating and rotation speed of the fan；
Blower module: N number of fan of the acceptable frequency control in 10KHZ-25KHZ.
6. a kind of according to claim 3, server fan rotating speed control device, characterized in that the BMC module packet
It includes:
Rotation speed of the fan calculates module: for calculating the minimum speed and maximum speed that meet the N number of fan of radiating requirements；
Rotation speed of the fan control module: for successively issuing N number of pulse of PWM1 to PWMN by fixed interval to N number of fan
Signal adjusts fan PID, adjusts N number of fan dynamically between the minimum speed of radiating requirements and maximum speed meeting respectively,
The revolving speed for obtaining N number of fan simultaneously feeds back to rotation speed of the fan and calculates module.
7. a kind of according to claim 5, server fan rotating speed control device, the rotation speed of the fan control module,
It is characterized in, comprising:
Fan signal control module: for issuing independent pwm control signal to N number of fan；
Signal feedback module: it for obtaining the revolving speed of N number of fan, feeds back to rotation speed of the fan and calculates module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810885021.4A CN109083857A (en) | 2018-08-06 | 2018-08-06 | A kind of server fan rotating speed control method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810885021.4A CN109083857A (en) | 2018-08-06 | 2018-08-06 | A kind of server fan rotating speed control method and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109083857A true CN109083857A (en) | 2018-12-25 |
Family
ID=64833974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810885021.4A Pending CN109083857A (en) | 2018-08-06 | 2018-08-06 | A kind of server fan rotating speed control method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109083857A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109933173A (en) * | 2019-03-21 | 2019-06-25 | 浪潮商用机器有限公司 | Fan control device and equipment in a kind of server system |
| CN111288009A (en) * | 2020-03-06 | 2020-06-16 | 上海申矽凌微电子科技有限公司 | Method and system for integrating temperature voltage monitoring and fan control |
| CN112664475A (en) * | 2020-12-09 | 2021-04-16 | 深圳市科陆电子科技股份有限公司 | Fan control method, device, equipment and storage medium |
| CN112780600A (en) * | 2019-11-01 | 2021-05-11 | 大唐国际发电股份有限公司陡河发电厂 | Method for improving regulation of rotating speed of air pump based on chopping control |
| CN113031712A (en) * | 2021-02-25 | 2021-06-25 | 山东英信计算机技术有限公司 | RV damping method, server and medium |
| CN113190096A (en) * | 2021-03-30 | 2021-07-30 | 联想(北京)信息技术有限公司 | Speed regulation method and device for server fan and computer readable medium |
| CN114654896A (en) * | 2020-12-23 | 2022-06-24 | 理想科学工业株式会社 | Suction fan control device |
| CN117048290A (en) * | 2023-10-10 | 2023-11-14 | 深圳市网联车云科技有限公司 | Ventilation device, method and system for passenger room of vehicle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748312A (en) * | 2011-04-21 | 2012-10-24 | 鸿富锦精密工业（深圳）有限公司 | Control device for rotating speed of fan |
| CN104122910A (en) * | 2014-07-23 | 2014-10-29 | 深圳市腾讯计算机系统有限公司 | Integral equipment cabinet ventilation wall controlling system and integral equipment cabinet ventilation wall controlling method |
| CN105715571A (en) * | 2014-12-01 | 2016-06-29 | 中兴通讯股份有限公司 | Communication equipment and multi-fan control method and device thereof |
| CN108088048A (en) * | 2017-10-25 | 2018-05-29 | 宁波奥克斯电气股份有限公司 | Multi-connected machine blower control method, control device and air conditioner |
-
2018
- 2018-08-06 CN CN201810885021.4A patent/CN109083857A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748312A (en) * | 2011-04-21 | 2012-10-24 | 鸿富锦精密工业（深圳）有限公司 | Control device for rotating speed of fan |
| CN104122910A (en) * | 2014-07-23 | 2014-10-29 | 深圳市腾讯计算机系统有限公司 | Integral equipment cabinet ventilation wall controlling system and integral equipment cabinet ventilation wall controlling method |
| CN105715571A (en) * | 2014-12-01 | 2016-06-29 | 中兴通讯股份有限公司 | Communication equipment and multi-fan control method and device thereof |
| CN108088048A (en) * | 2017-10-25 | 2018-05-29 | 宁波奥克斯电气股份有限公司 | Multi-connected machine blower control method, control device and air conditioner |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109933173A (en) * | 2019-03-21 | 2019-06-25 | 浪潮商用机器有限公司 | Fan control device and equipment in a kind of server system |
| CN112780600A (en) * | 2019-11-01 | 2021-05-11 | 大唐国际发电股份有限公司陡河发电厂 | Method for improving regulation of rotating speed of air pump based on chopping control |
| CN112780600B (en) * | 2019-11-01 | 2022-03-04 | 大唐国际发电股份有限公司陡河发电厂 | Method for improving regulation of rotating speed of air pump based on chopping control |
| CN111288009A (en) * | 2020-03-06 | 2020-06-16 | 上海申矽凌微电子科技有限公司 | Method and system for integrating temperature voltage monitoring and fan control |
| CN111288009B (en) * | 2020-03-06 | 2022-01-18 | 上海申矽凌微电子科技有限公司 | Method and system for integrating temperature voltage monitoring and fan control |
| CN112664475A (en) * | 2020-12-09 | 2021-04-16 | 深圳市科陆电子科技股份有限公司 | Fan control method, device, equipment and storage medium |
| CN114654896A (en) * | 2020-12-23 | 2022-06-24 | 理想科学工业株式会社 | Suction fan control device |
| CN113031712A (en) * | 2021-02-25 | 2021-06-25 | 山东英信计算机技术有限公司 | RV damping method, server and medium |
| CN113190096A (en) * | 2021-03-30 | 2021-07-30 | 联想(北京)信息技术有限公司 | Speed regulation method and device for server fan and computer readable medium |
| CN117048290A (en) * | 2023-10-10 | 2023-11-14 | 深圳市网联车云科技有限公司 | Ventilation device, method and system for passenger room of vehicle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109083857A (en) | A kind of server fan rotating speed control method and device | |
| US9918410B2 (en) | Fan control system and method | |
| US8292593B2 (en) | System for minimizing mechanical and acoustical fan noise coupling | |
| CN103353136B (en) | A kind of there is air quantity regulatory function range hood and control system and control method | |
| CN103062086B (en) | Radiation system and controlling method thereof | |
| US8569989B2 (en) | Pulse width modulation fan controller | |
| CN106357102B (en) | Busbar voltage control method for brshless DC motor driving frequency converter | |
| US9188996B2 (en) | System and method for controlling computer system fan speed | |
| CN107643811A (en) | A kind of fan regulation and controlling optimization method based on PID control principle | |
| CN104454616A (en) | Method for accurately regulating and controlling rotating speed of fan | |
| JP7005659B2 (en) | Power supply method to the power supply network by the power supply device controlled by the converter | |
| CN111124086A (en) | Method and device for regulating and controlling rotating speed of server fan | |
| CN104102313A (en) | Energy-saving and noise-reduction server fan regulation and control method | |
| CN110196608A (en) | A kind of heat dissipation of terminal device and the cooling control method based on heat dissipation of terminal device | |
| CN102261343A (en) | Device and method for speed regulation of fan | |
| CN102192174A (en) | Method for controlling the rotation speed of fan | |
| CN105240303A (en) | Efficient and energy-saving SmartRack cabinet fan regulation and control method | |
| CN109424570A (en) | A kind of control method and device of fan | |
| CN104074784A (en) | Fan control system and method | |
| EP2403129A3 (en) | System and method for non-sinusoidal current waveform excitation of electrical generators | |
| CN205847438U (en) | A kind of monitor supervision platform intelligent heat dissipation system | |
| CN108811431A (en) | Heat dissipation system and heat dissipation system stabilizing method | |
| CN112460053A (en) | Fan control method, system, equipment and storage medium | |
| JP2012151993A (en) | Electric power conversion system and rotary machine drive system using the same | |
| CN103629137B (en) | Noise reduction processing method for DCS cabinet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181225 |