CN104863880A - Fan rotating speed synchronization method and device - Google Patents
Fan rotating speed synchronization method and device Download PDFInfo
- Publication number
- CN104863880A CN104863880A CN201410060063.6A CN201410060063A CN104863880A CN 104863880 A CN104863880 A CN 104863880A CN 201410060063 A CN201410060063 A CN 201410060063A CN 104863880 A CN104863880 A CN 104863880A
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- China
- Prior art keywords
- fan
- pulse wave
- wave signal
- rotation speed
- microprocessor
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Classifications
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- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
The invention provides a fan rotating speed synchronization method and a device, applied to a first fan and a second fan in butt joint. The method comprises the following steps: a pulse wave period width generated by a first fan rotating speed is sensed through a first hall sensor, and is converted to a first pulse wave signal to send to a microprocessor; a pulse wave period width generated by a second fan rotating speed is sensed through a second hall sensor, and is converted to a second pulse wave signal to send to the microprocessor; the microprocessor compares the first pulse wave signal with the second pulse wave signal corresponding to the pulse wave period widths of the first fan rotating speed and the second fan rotating speed; the microprocessor generates a pulse wave modulation signal to send to the second fan according to the magnitude difference of the first pulse wave signal and the second pulse wave signal; and the microprocessor controls the second fan rotating speed to be equal to the first fan rotating speed by the pulse wave modulation signal, thereby, effectively controlling the fan rotating speed synchronization and synchronously reducing the fan operation noise.
Description
Technical field
The present invention relates to a kind of rotation speed of the fan synchronous method and device, particularly relate to a kind of the rotation speed of the fan synchronous method and the device that synchronization are provided and reduce fan running noise.
Background technique
Along with the progress of science and technology, people also increase for the dependence of various electronic equipment thereupon, but, again in order to meet considering of portability and practicability, current electronic product on the market in design, often all tend to compact, function is many, and processing rate carrys out the main shaft as design soon, so that the product made more can meet the life requirement of modern society, again in order to meet considering of portability and practicability, current electronic product is on the market (as computer, mobile computer) in design, often all tend to compact, function is many, and carry out the main shaft as design soon with processing rate, just the life requirement of modern society more can be met with the product made.
In order to the effect of heat radiation fan, in traditional fan control, system manufacturer is often designed to, when electronic product temperature rises, just increase the rotating speed of fan, to accelerate the effect of dispelling the heat.Typical mode, carries out temperature detecting by electronic product, then along with detected temperature, via a fan governor, controls the rotating speed of fan.In general, by pulse wave width modulation (PWM) responsibility ratio or the output of voltage, the just rotating speed of controlling fan; Again or sometimes the wind-force that single fan can provide may be not enough, therefore usually the fan of more than two or two can be connected in series assembling and use, can provide enough wind-force.
Again, though its combination of fans via serial connection assembling provides identical initial conditions in the running, but mutual interference can be produced because of the not identical or difference of rotation speed of the fan, impact and around Flow Field Distribution and occur rotating speed deviation between two fans and asynchronous, and when nonsynchronous situation produces, it disturbs the noise spectrum of generation increase and cannot eliminate mutually, more and asynchronous its fan running efficiency that also can affect of its fan running; Therefore prior art has following shortcoming:
1. rotating speed deviation is asynchronous;
2. noise cannot be reduced.
Therefore, how to solve the problem and defect, the inventor being this case studies the place, direction of improving with the anxious wish of relevant manufactures institute being engaged in the industry.
Summary of the invention
Therefore, for effectively solving the problem, main purpose of the present invention is to provide the synchronous rotation speed of the fan synchronous method of a kind of controlling fan and device.
Secondary objective of the present invention is providing a kind of the rotation speed of the fan synchronous method and the device that reduce fan running noise.
Secondary objective of the present invention is providing a kind of the rotation speed of the fan synchronous method and the device that promote fan running efficiency.
For reaching above-mentioned purpose, the invention provides a kind of rotation speed of the fan synchronous method and device, be applied to the first fan and second fan of docking mutually, it comprises step:
By the Pulse period width that one first Hall transducer sensing is produced by the first rotation speed of the fan, and convert its Pulse period width to first pulse wave signal and be sent to a microprocessor;
The another Pulse period width produced by the second rotation speed of the fan by one second Hall transducer sensing, and convert its Pulse period width to second pulse wave signal and be sent to described microprocessor;
This microprocessor compares this first rotation speed of the fan first pulse wave signal corresponding with the Pulse period width of the second rotation speed of the fan and the second pulse wave signal;
This microprocessor produces pulse wave modulation signal to the second fan according to the difference in size of the first pulse wave signal and the second pulse wave signal;
It is equal with the first rotation speed of the fan that described microprocessor controls the second rotation speed of the fan via described pulse wave modulation signal.
When the first pulse wave signal is greater than the second pulse wave signal, this microprocessor increases the Pulse period width of described second rotation speed of the fan generation via pulse wave modulation signal.
When the first pulse wave signal is less than the second pulse wave signal, this microprocessor reduces the Pulse period width of described second rotation speed of the fan generation via pulse wave modulation signal.
When the first pulse wave signal equals the second pulse wave signal, the Pulse period width that this microprocessor keeps described second rotation speed of the fan to produce via pulse wave modulation signal.
By the design of the method for the present invention, effectively can control rotation speed of the fan synchronous, and the effect of fan running noise can be reduced simultaneously.
Accompanying drawing explanation
Fig. 1 is the block schematic diagram of present pre-ferred embodiments;
Fig. 2 is the flow chart of steps of present pre-ferred embodiments.
Symbol description
First fan 1
Second fan 2
First Hall transducer 3
Second Hall transducer 4
Microprocessor 5
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
Characteristic on above-mentioned purpose of the present invention and structure and fuction thereof, is explained the preferred embodiment according to institute's accompanying drawings.
Refer to shown in the 1st figure and the 2nd figure, for block schematic diagram and the flow chart of steps of rotation speed of the fan synchronous method of the present invention and device preferred embodiment, as shown in the figure, a kind of rotation speed of the fan synchronous method and application of installation are in the first fan 1 and the second fan 2 of docking mutually, and it comprises step:
Step S1, the Pulse period width produced by the first rotation speed of the fan by one first Hall transducer sensing, and convert its Pulse period width to first pulse wave signal and be sent to a microprocessor;
When wherein said first fan 1 operates, its stator pack can produce Pulse period, its Pulse period also produces different Pulse period width according to the rotating speed situation of described first fan 1, and the Pulse period width produced by the first fan 1 rotating speed is sensed by one first Hall transducer 3, described first Hall transducer 3 senses the Pulse period width of described first fan 1 rotating speed generation and converts its Pulse period width to first pulse wave signal, and its first pulse wave signal is sent to a microprocessor 5.
Step S2, the another Pulse period width produced by the second rotation speed of the fan by one second Hall transducer sensing;
When wherein said second fan 2 operates, its stator pack can produce Pulse period, its Pulse period also produces different Pulse period width according to the rotating speed situation of described second fan 2, and the Pulse period width produced by the second fan 2 rotating speed is sensed by one second Hall transducer 4, described second Hall transducer 4 senses the Pulse period width of described second fan 2 rotating speed generation and converts its Pulse period width to second pulse wave signal, and its second pulse wave signal is sent to described microprocessor 5.
Step S3, this microprocessor compares this first rotation speed of the fan first pulse wave signal corresponding with the Pulse period width of the second rotation speed of the fan and the second pulse wave signal;
Described microprocessor 5 receives the first pulse wave signal and the second pulse wave signal of described first Hall transducer 3 and the second hall sensor 4, and compares for its first fan 1 rotating speed first pulse wave signal corresponding with the Pulse period width of the second fan 2 rotating speed and the second pulse wave signal.
Step S4, this microprocessor produces pulse wave modulation signal to the second fan according to the difference in size of the first pulse wave signal and the second pulse wave signal;
Described microprocessor 5 for described first pulse wave signal and the second pulse wave signal variant time can produce a pulse wave modulation signal, and described pulse wave modulation signal is delivered to the second fan 2.
When the first pulse wave signal is greater than the second pulse wave signal, now perform step S5, this microprocessor increases the Pulse period width of described second rotation speed of the fan generation via pulse wave modulation signal; When the first pulse wave signal is less than the second pulse wave signal, now perform step S6, this microprocessor reduces the Pulse period width of described second rotation speed of the fan generation via pulse wave modulation signal; When the first pulse wave signal equals the second pulse wave signal, now perform step S7, this microprocessor keeps the Pulse period width of described second rotation speed of the fan generation via pulse wave modulation signal.
The more described first pulse wave signal of wherein said microprocessor 5 and the second pulse wave signal, if when the Pulse period width of its first pulse wave signal is greater than the Pulse period width of the second pulse wave signal, the Pulse period width that its microprocessor 5 produces via described second fan 2 rotating speed of pulse wave modulation signal increase, the Pulse period width that its second fan 2 rotating speed is produced is equal with the Pulse period width of the first pulse wave signal, and and then to control its second fan 2 rotating speed equal with the first fan 1 rotating speed.
If when the Pulse period width of its first pulse wave signal is less than the Pulse period width of the second pulse wave signal, the Pulse period width that its microprocessor 5 produces via described second fan 2 rotating speed of pulse wave modulation signal minimizing, the Pulse period width that its second fan 2 rotating speed is produced is equal with the Pulse period width of the first pulse wave signal, and and then to control its second fan 2 rotating speed equal with the first fan 1 rotating speed.
If when the Pulse period width of its first pulse wave signal equals the Pulse period width of the second pulse wave signal, the Pulse period width that its microprocessor 5 keeps described second fan 2 rotating speed to produce via pulse wave modulation signal, maintain the Pulse period width that its second fan 2 rotating speed produces equal with the Pulse period width of the first pulse wave signal, and make its second fan 2 rotating speed equal with the first fan 1 rotating speed.
Step S8, it is equal with the first rotation speed of the fan that described microprocessor controls the second rotation speed of the fan via described pulse wave modulation signal.
The pulse wave modulation signal that described microprocessor 5 produces via the difference after comparison removes control second fan 2 rotating speed, makes its second rotation speed of the fan equal with the first rotation speed of the fan.
Whereby, first fan 1 of described mutual docking and the second fan 2 are in time mutually operating, control its first fan 1 with the second fan 2 operate with identical synchronization by described first Hall transducer 3 with the second Hall transducer 4 and microprocessor 5, and effectively produce the problem of noise between reduction fan because rotating speed difference.
The above, the present invention has following advantages compared to prior art:
1. operate with identical synchronization between fan;
2. effectively reduce the problem producing noise between fan because rotating speed is different;
3. promote fan running efficiency.
Although the present invention discloses as above with mode of execution; so itself and be not used to limit the present invention, any person skilled in the art person, without departing from the spirit and scope of the present invention; when being used for a variety of modifications and variations, therefore protection scope of the present invention is when being decided to be standard with claims.
Claims (4)
1. rotation speed of the fan synchronous method and a device, be applied to the first fan and second fan of docking mutually, it comprises step:
By the Pulse period width that one first Hall transducer sensing is produced by the first rotation speed of the fan, and convert its Pulse period width to first pulse wave signal and be sent to a microprocessor;
The another Pulse period width produced by the second rotation speed of the fan by one second Hall transducer sensing, and convert its Pulse period width to second pulse wave signal and be sent to described microprocessor;
This microprocessor compares this first rotation speed of the fan first pulse wave signal corresponding with the Pulse period width of the second rotation speed of the fan and the second pulse wave signal;
This microprocessor produces pulse wave modulation signal to the second fan according to the difference in size of the first pulse wave signal and the second pulse wave signal;
It is equal with the first rotation speed of the fan that described microprocessor controls the second rotation speed of the fan via described pulse wave modulation signal.
2. rotation speed of the fan synchronous method as claimed in claim 1 and device, wherein when the first pulse wave signal is greater than the second pulse wave signal, this microprocessor increases the Pulse period width of described second rotation speed of the fan generation via pulse wave modulation signal.
3. rotation speed of the fan synchronous method as claimed in claim 1 and device, wherein when the first pulse wave signal is less than the second pulse wave signal, this microprocessor reduces the Pulse period width of described second rotation speed of the fan generation via pulse wave modulation signal.
4. rotation speed of the fan synchronous method as claimed in claim 1 and device, wherein when the first pulse wave signal equals the second pulse wave signal, the Pulse period width that this microprocessor keeps described second rotation speed of the fan to produce via pulse wave modulation signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410060063.6A CN104863880A (en) | 2014-02-21 | 2014-02-21 | Fan rotating speed synchronization method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410060063.6A CN104863880A (en) | 2014-02-21 | 2014-02-21 | Fan rotating speed synchronization method and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104863880A true CN104863880A (en) | 2015-08-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410060063.6A Pending CN104863880A (en) | 2014-02-21 | 2014-02-21 | Fan rotating speed synchronization method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104863880A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106211715A (en) * | 2016-08-12 | 2016-12-07 | 锐捷网络股份有限公司 | A kind of control method for fan and device |
| CN107100875A (en) * | 2016-11-01 | 2017-08-29 | 奇鋐科技股份有限公司 | Rotating speed of several fans single line output system and its method |
| CN107526241A (en) * | 2016-06-20 | 2017-12-29 | 株式会社理光 | The control method of image projection device and image projection device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3718846A (en) * | 1971-04-13 | 1973-02-27 | Borg Warner | Variable speed plural motor control system with incremental speed synchronization |
| US6428282B1 (en) * | 1999-06-14 | 2002-08-06 | Hewlett-Packard Company | System with fan speed synchronization control |
| CN1992504A (en) * | 2005-12-30 | 2007-07-04 | 上海乐金广电电子有限公司 | Motor synchronizing speed control apparatus |
| CN101107482A (en) * | 2005-02-21 | 2008-01-16 | 松下电器产业株式会社 | Fan filter unit |
| CN102904496A (en) * | 2012-09-28 | 2013-01-30 | 苏州生物医学工程技术研究所 | Double-motor synchronous control system and synchronous control method thereof |
| CN103475280A (en) * | 2013-08-16 | 2013-12-25 | 东营瑞源特种建筑材料有限公司 | Flexible facing brick drying production line multi-motor automatic synchronizer |
| CN203685643U (en) * | 2014-02-21 | 2014-07-02 | 奇鋐科技股份有限公司 | Fan rotation speed synchronizer |
-
2014
- 2014-02-21 CN CN201410060063.6A patent/CN104863880A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3718846A (en) * | 1971-04-13 | 1973-02-27 | Borg Warner | Variable speed plural motor control system with incremental speed synchronization |
| US6428282B1 (en) * | 1999-06-14 | 2002-08-06 | Hewlett-Packard Company | System with fan speed synchronization control |
| CN101107482A (en) * | 2005-02-21 | 2008-01-16 | 松下电器产业株式会社 | Fan filter unit |
| CN1992504A (en) * | 2005-12-30 | 2007-07-04 | 上海乐金广电电子有限公司 | Motor synchronizing speed control apparatus |
| CN102904496A (en) * | 2012-09-28 | 2013-01-30 | 苏州生物医学工程技术研究所 | Double-motor synchronous control system and synchronous control method thereof |
| CN103475280A (en) * | 2013-08-16 | 2013-12-25 | 东营瑞源特种建筑材料有限公司 | Flexible facing brick drying production line multi-motor automatic synchronizer |
| CN203685643U (en) * | 2014-02-21 | 2014-07-02 | 奇鋐科技股份有限公司 | Fan rotation speed synchronizer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107526241A (en) * | 2016-06-20 | 2017-12-29 | 株式会社理光 | The control method of image projection device and image projection device |
| CN106211715A (en) * | 2016-08-12 | 2016-12-07 | 锐捷网络股份有限公司 | A kind of control method for fan and device |
| CN107100875A (en) * | 2016-11-01 | 2017-08-29 | 奇鋐科技股份有限公司 | Rotating speed of several fans single line output system and its method |
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Application publication date: 20150826 |
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