CN1477471A - Fan rotating speed contral circuit - Google Patents
Fan rotating speed contral circuit Download PDFInfo
- Publication number
- CN1477471A CN1477471A CNA021294941A CN02129494A CN1477471A CN 1477471 A CN1477471 A CN 1477471A CN A021294941 A CNA021294941 A CN A021294941A CN 02129494 A CN02129494 A CN 02129494A CN 1477471 A CN1477471 A CN 1477471A
- Authority
- CN
- China
- Prior art keywords
- circuit
- fan
- thermistor
- temperature
- 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
Images
Landscapes
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
The present invention discloses a fan rotating speed control circuit, including an amplification circuit and a bleeder circuit. The amplification circuit is formed from three groups of resistors, a Zener diode, two groups of transistors and a capacitor for controlling fan-driving and rotating speed regulating circuit, and its bleeder circuit is formed from a positive temp. coefficient thermister, a negative temp. coefficient thermister, three groups of resistors and a diode for detecting circuit of temp. change. It can greatly raise the temp. sensitivity of fan and effectively control the rotating speed of fan.
Description
Technical field
The present invention relates to a kind of circuit for controlling speed of fan.
Background technology
In the general electronic products main frame (as host computer), because of the internal electronic element heat temperature that meeting produces in execution work, so being common in the main frame installing radiator fan gives in the cooler high temperature and does a heat interchange, can avoid built-in temperature too high and influence the operating characteristic of electronic component, and then prolong electronic component serviceable life.
Above-mentioned radiator fan collocation control circuit provides single voltage to drive and does single rotating speed control, therefore the radiator fan of this single rotating speed control can not be adjusted the required rotating speed of realistic temperature heat interchange with the peripheral temperature variation, the suitable power consumption of so long-term energising running, and lasting running causes easily burns inefficacy, so its applicability haves much room for improvement.
This industry is because the radiator fan shortcoming of above-mentioned single rotating speed control is developed a kind of circuit for controlling speed of fan, and the may command radiator fan possesses the characteristic that changes rotating speed with temperature is arranged, and can have the benefit of power saving simultaneously concurrently.
With present circuit for controlling speed of fan, common have a kind of mainly with the control circuit of subzero temperature number of degrees thermistor collocation one simple amplifying return circuit, but this kind control circuit is depended merely on a subzero temperature number of degrees thermistor and is detected peripheral temperature and the controlling and driving fan, and its sensitivity to temperature variation is not high; And another kind is with the arrange in pairs or groups control circuit of complicated amplifying return circuit of a comparer, though its highly sensitive to temperature variation, its associated electrical element is many, the manufacturing cost height, and excessive because of its volume, be vulnerable to restriction at assembling space.
Summary of the invention
For overcoming the deficiencies in the prior art, the invention provides a kind of circuit for controlling speed of fan, comprising:
One amplifying circuit is checked by three groups of resistance, and to be received diode, two group transistors and an electric capacity and constituted the circuit of control fans drive and adjustable variable speed;
One bleeder circuit is counted thermistor, a subzero temperature number of degrees thermistor, three groups of resistance and a diode by a positive temperature and is constituted the circuit that can detect temperature variation; It is characterized in that:
This diode is distinguished two circuits in parallel with the dividing point on the resistance series circuit, wherein a parallel wire road is provided with positive temperature and counts thermistor, another parallel line is provided with negative temperature thermistor, to make this positive temperature count the branch pressure voltage that thermistor and the mutual collocation of subzero temperature number of degrees thermistor can strengthen dividing point, branch pressure voltage can be done to change significantly through simple amplifying return circuit again to fan voltage.
The inventor is based on the demand of circuit for controlling speed of fan, improved at existing fan control circuitry, utilize on the amplifying return circuit of a simple drive fan and count setting up of thermistor by a positive and negative temperature, make on the loop positive and negative temperature count the branch pressure voltage that the mutual collocation of thermistor can strengthen dividing point, branch pressure voltage can be done to change significantly through simple amplifying return circuit again to fan voltage, and then significantly improve fan to temperature control, can effectively control rotation speed of the fan.
The loop that the circuit for controlling speed of fan that provides is provided is simple, the electronics component part is few, have and reduce the benefit of making, and the integrated circuit application implementation is little in the circuit substrate upper volume, be convenient to very much assembling, can place fan inside or outside, make fan under the assembling surrounding enviroment, can detect temperature variation and vary with temperature and adjust its rotating speed.
Description of drawings
Figure 1 shows that circuit for controlling speed of fan figure of the present invention.
Figure 2 shows that the bleeder circuit synoptic diagram of known circuit for controlling speed of fan.
Figure 3 shows that the bleeder circuit synoptic diagram of circuit for controlling speed of fan of the present invention.
Figure 4 shows that the corresponding relation synoptic diagram of a temperature and rotation speed of the fan.
Figure 5 shows that practical application enforcement illustration of the present invention.
Embodiment
Now with regard to taking off the specific embodiment of circuit for controlling speed of fan that purpose adopts in the present invention, cooperate graphic being explained.
See also shown in Figure 1ly, circuit for controlling speed of fan of the present invention includes an amplifying circuit 1 and a bleeder circuit 2.Wherein this amplifying circuit 1 is by three groups of resistance R 1, R2, R3, one checks and receives diode ZD1, two group transistor Q1, the circuit of Q2 and a fan that capacitor C 1 constitutes 3 drivings and adjustable variable speed, its transistor Q1 can detect the voltage of bleeder circuit 2, and the output voltage of triggering transistor Q2, make transistor Q2 can control the DC voltage input of adjustment fan 3, driving and modulation rotating speed with control fan 3, so amplifying circuit 1 is lower as if the output voltage that detects bleeder circuit 2, its rotating speed of its transistor Q2 controlling fan 3 modulations is higher, reaches the loop of a controlling fan 3 modulation rotating speeds.
Above-mentioned bleeder circuit 2 is counted thermistor TH1 by a positive temperature, one subzero temperature number of degrees thermistor TH2, three groups of resistance R 4, R5, a R6 and a diode D1 constitute the circuit that can detect temperature variation, two circuits in parallel respectively of the dividing point A on diode D1 and resistance R 4 series circuits wherein, wherein a parallel wire road is provided with positive temperature and counts thermistor TH1, another parallel line is provided with subzero temperature number of degrees thermistor TH2, so positive temperature is counted the branch pressure voltage that thermistor TH1 and the mutual collocation of subzero temperature number of degrees thermistor TH2 can strengthen dividing point A, and branch pressure voltage can be done change significantly to fan 3 voltages through simple amplifying return circuit 1 again.
Again with regard to the known bleeder circuit (as shown in Figure 2) that on dividing point A, is respectively equipped with a resistance R parallel line and a subzero temperature number of degrees thermistor TH2 parallel line, and be respectively equipped with a positive temperature on the dividing point A of the present invention and count the comparison that performs an analysis of the bleeder circuit (as shown in Figure 3) of a thermistor TH1 parallel line and a subzero temperature number of degrees thermistor TH2 parallel line:
If it is right to make intrinsic standoff ratio under same room temperature, its general resistance R is 10K, and it is 15K that then positive temperature is counted thermistor TH1, and subzero temperature number of degrees thermistor TH2 then is 5K, so the dividing point A of known bleeder circuit imports through a 12V voltage, its dividing point A goes up input 12V voltage can be divided into the output of 4V voltage; And the dividing point A of bleeder circuit of the present invention imports through a 12V voltage, and its dividing point A goes up input 12V voltage can be divided into the output of 3V voltage, so bleeder circuit of the present invention 2 can strengthen the branch pressure voltage of dividing point A under same test condition.
Moreover, just in general substructure for electrical device institute allowable temperature scope, make the corresponding relation test experiments of a temperature and rotation speed of the fan, can learn as the temperature of Fig. 4 and the corresponding relation synoptic diagram of rotating speed with known circuit for controlling speed of fan and circuit for controlling speed of fan of the present invention.
The B line segment slope of the corresponding relation of this known circuit for controlling speed of fan such as Fig. 4, and the A line segment slope of the corresponding relation of circuit for controlling speed of fan of the present invention such as Fig. 4.
Can find out that thus fan 3 of the present invention can vary with temperature and make in the scope of its rotating speed control by 1500rpm to 3500rpm; And known fan 3 can vary with temperature and makes in the scope of its rotating speed control by 2000rpm to 2800rpm.So can find out that clearly this case circuit for controlling speed of fan can significantly improve fan to temperature control, and then can effectively control fan 3 changes rotating speed significantly with temperature benefit.
Learn by above-mentioned explanation, circuit for controlling speed of fan provided by the present invention by one just improves, subzero temperature number of degrees thermistor TH1, the mutual collocation of TH2 can strengthen the branch pressure voltage of dividing point A, can effectively improve the known control circuit shortcoming not high to the sensitivity of temperature variation with subzero temperature number of degrees thermistor TH2 collocation one simple amplifying return circuit 1, and this circuit does not need the technological means for making rotation speed of the fan must use complicated comparator circuit to reach to the demand of temperature control rising, the present invention improves circuit and not only has the characteristic of simplifying circuit, and electronics component part number is few, manufacturing cost can reduce relatively, and the integrated circuit application implementation is also little in the circuit substrate upper volume, can help being assembled in fan 3 inner spaces and hide.
As shown in Figure 5, the present invention can count positive and negative temperature the temperature that thermistor TH1, TH2 are arranged in detecting surrounding enviroment on the ribs 31 of fan 3 respectively, and circuit substrate is hidden in fan 3 rotating shaft rears, make fan 3 can have overall aesthetics, also do not influence the operation of its control rotation speed of the fan modulation.
Certainly, circuit for controlling speed of fan practical application of the present invention implements to place fan outside or inner, can make fan detect temperature under the surrounding enviroment in assembling raises several times under the situation, can make rotation speed of the fan cut high-speed rotation by low speed, can effectively control fan and change rotating speed, quite have industry applications with temperature.
To sum up institute is old, and circuit for controlling speed of fan provided by the present invention improves, and can reach expection really and improve the purpose of rotation speed of the fan to temperature control, and whole circuit is simple and easy to implement, can help application implementation, and conform with the production economic benefit, have industry applications and progressive.
Claims (1)
1, a kind of circuit for controlling speed of fan comprises:
One amplifying circuit is checked by three groups of resistance, and to be received diode, two group transistors and an electric capacity and constituted the circuit of control fans drive and adjustable variable speed;
One bleeder circuit is counted thermistor, a subzero temperature number of degrees thermistor, three groups of resistance and a diode by a positive temperature and is constituted the circuit that can detect temperature variation; It is characterized in that:
This diode is distinguished two circuits in parallel with the dividing point on the resistance series circuit, wherein a parallel wire road is provided with positive temperature and counts thermistor, another parallel line is provided with negative temperature thermistor, count the branch pressure voltage that thermistor and the mutual collocation of subzero temperature number of degrees thermistor can strengthen dividing point to make this positive temperature, branch pressure voltage is again through simple amplifying return circuit, so that fan voltage is done to change significantly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021294941A CN1477471A (en) | 2002-08-23 | 2002-08-23 | Fan rotating speed contral circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021294941A CN1477471A (en) | 2002-08-23 | 2002-08-23 | Fan rotating speed contral circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1477471A true CN1477471A (en) | 2004-02-25 |
Family
ID=34144183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA021294941A Pending CN1477471A (en) | 2002-08-23 | 2002-08-23 | Fan rotating speed contral circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1477471A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101369806B (en) * | 2007-08-15 | 2010-06-16 | 台达电子工业股份有限公司 | Fan and fan system and its wave filter |
| CN103199776A (en) * | 2013-04-18 | 2013-07-10 | 中国扬子集团滁州扬子空调器有限公司 | Circuit for switching fixed rotating speed and adjustable rotating speed of outdoor direct-current motor of air-conditioner |
| CN104948491A (en) * | 2014-03-28 | 2015-09-30 | 智邦科技股份有限公司 | Control device and control method |
| CN106992726A (en) * | 2016-01-19 | 2017-07-28 | 建准电机工业股份有限公司 | Motor power supply circuit |
| US9900717B2 (en) | 2015-11-03 | 2018-02-20 | Asustek Computer Inc. | Thermal protecting device of speaker |
| CN108112135A (en) * | 2018-01-26 | 2018-06-01 | 广州汗马电子科技有限公司 | LED lamp and its power circuit |
-
2002
- 2002-08-23 CN CNA021294941A patent/CN1477471A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101369806B (en) * | 2007-08-15 | 2010-06-16 | 台达电子工业股份有限公司 | Fan and fan system and its wave filter |
| CN103199776A (en) * | 2013-04-18 | 2013-07-10 | 中国扬子集团滁州扬子空调器有限公司 | Circuit for switching fixed rotating speed and adjustable rotating speed of outdoor direct-current motor of air-conditioner |
| CN103199776B (en) * | 2013-04-18 | 2016-05-25 | 中国扬子集团滁州扬子空调器有限公司 | Direct current generator fixed rotating speed and adjustable rotating speed commutation circuit outside air conditioning chamber |
| CN104948491A (en) * | 2014-03-28 | 2015-09-30 | 智邦科技股份有限公司 | Control device and control method |
| CN104948491B (en) * | 2014-03-28 | 2016-11-23 | 智邦科技股份有限公司 | Control device and control method |
| US9732758B2 (en) | 2014-03-28 | 2017-08-15 | Accton Technology Corporation | Control device and control method |
| US9900717B2 (en) | 2015-11-03 | 2018-02-20 | Asustek Computer Inc. | Thermal protecting device of speaker |
| CN106992726A (en) * | 2016-01-19 | 2017-07-28 | 建准电机工业股份有限公司 | Motor power supply circuit |
| CN106992726B (en) * | 2016-01-19 | 2019-11-08 | 建准电机工业股份有限公司 | Motor power supply circuit |
| CN108112135A (en) * | 2018-01-26 | 2018-06-01 | 广州汗马电子科技有限公司 | LED lamp and its power circuit |
| CN108112135B (en) * | 2018-01-26 | 2023-10-27 | 广州汗马电子科技有限公司 | LED lamp and power supply circuit thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8120911B2 (en) | Heat dissipation device | |
| US7708056B2 (en) | Fan controlling system and method | |
| CN201638129U (en) | Heat dissipation module with size-adjustable ventilation opening and related computer system | |
| CN1722041A (en) | Pulse width modulation fan control | |
| CN1959580A (en) | Circuit for controlling speed of fan, and control method | |
| TWI398089B (en) | Method and circuit for controlling motor speed | |
| CN1477471A (en) | Fan rotating speed contral circuit | |
| CN1808889A (en) | Speed governing control method and speed governor for cooling fan of electromagnetic oven | |
| CN1949119A (en) | Fan system and method with circuit magnetic hysteresis feature | |
| CN2874580Y (en) | Temperature control speed changing circuit of DC brushless fan motor | |
| CN105465027A (en) | Device for intelligently controlling linear rotating speed of heat radiating fan | |
| CN1297860C (en) | Motor speed controller | |
| CN1902557A (en) | Apparatus and method for controlling temperature | |
| US20130265718A1 (en) | Heat dissipation circuit and electronic device having the same | |
| CN1866147B (en) | Fan control device and method | |
| CN208690918U (en) | A kind of thermal-shutdown circuit | |
| CN2569190Y (en) | Fan rotary speed intelligent controller for electronic circuit system | |
| CN2872783Y (en) | Speed adjuster of cooling fan for electromagnetic cooker | |
| CN108919851A (en) | Temperature control method, system and the device of integrated circuit | |
| CN1731531A (en) | The instrument thermostatic control system | |
| CN2541893Y (en) | CPU radiator with its fan rotary speed controlled by CPU temp | |
| CN1194352C (en) | Integrated circuit for controlling soft disk driver | |
| CN2809282Y (en) | Heat radiation fan with rotation speed regulating element on fan circuit board | |
| CN208106813U (en) | Fan control circuitry and electrical equipment | |
| CN114909313B (en) | Circuit for automatically controlling fan rotating speed in real time during detecting temperature change of point |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |