CN201433925Y - Fan speed control circuit - Google Patents
Fan speed control circuit Download PDFInfo
- Publication number
- CN201433925Y CN201433925Y CN2009201218732U CN200920121873U CN201433925Y CN 201433925 Y CN201433925 Y CN 201433925Y CN 2009201218732 U CN2009201218732 U CN 2009201218732U CN 200920121873 U CN200920121873 U CN 200920121873U CN 201433925 Y CN201433925 Y CN 201433925Y
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- CN
- China
- Prior art keywords
- fan
- voltage regulator
- circuit
- resistance
- thermistor
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- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a an speed control circuit, comprising a thermistor RT and a fan FAN; the circuit further comprises a voltage regulator U1 and a resistance R1, and the voltage regulator U1and the fan FAN are connected at the input ends of a positive electrode and a negative electrode serially; one end of the thermistor RT is connected with the ADJ end of the voltage regulator U1, andthe other end thereof is connected with the negative electrode of the power supply; one end of the resistance R1 is connected with the OUT end of the voltage regulator U1, and the other end thereof isconnected with the ADJ end of the voltage regulator U1. The control circuit has simple structure, low cost and high working stability.
Description
Technical field
The utility model relates to and a kind ofly changing and the circuit of real-time regulated radiating fan rotation speed specifically is a kind of circuit for controlling speed of fan with the electronic product temperature in chassis.
Background technique
The circuit for controlling speed of fan of prior art comprises amplification circuit, bleeder circuit, and amplification circuit is made of the circuit of control fans drive and adjustable variable speed three groups of resistance, diode, two group transistors and an electric capacity; Bleeder circuit is constituted the circuit that can detect temperature variation by positive temperature coefficient thermistor, negative tempperature coefficient thermistor, three groups of resistance and diode.We are not difficult to find out by above-mentioned description, the electronic parts and components of the use of the circuit for controlling speed of fan of prior art are many, circuit structure more complicated, cost are high and because electronic parts and components are many, thus foregoing circuit stability can be poor in the process of work.
The model utility content
The technical problems to be solved in the utility model is, overcomes the defective of above prior art, and the circuit for controlling speed of fan that a kind of circuit structure is simple, cost is low and working stability is high is provided.
The technical solution of the utility model is, a kind of circuit for controlling speed of fan is provided, and comprises thermistor RT and fan FAN, and it also comprises voltage regulator U1 and resistance R 1, and described voltage regulator U1, fan FAN are connected on the positive and negative electrode input end of power supply; The end of described thermistor RT is connected with the ADJ of voltage regulator U1 end, and its other end is connected with the negative pole of power supply; One end of described resistance R 1 is connected with the OUT of voltage regulator U1 end, and its other end is connected with the ADJ end of voltage regulator U1.
After adopting above structure, the utility model compared with prior art, have the following advantages: the utility model circuit for controlling speed of fan comprises thermistor RT, fan FAN, voltage regulator U1 and resistance R 1, the electronic parts and components that this circuit uses are considerably less, circuit structure is very simple, cost is low and because components and parts are few, so components and parts stability in the course of the work is high.
As improvement, power input parallel connection of the present utility model capacitor C 1 come filtering improving the stability of power input voltage, thereby further improve the working stability of the utility model control circuit.
Description of drawings
Accompanying drawing is the circuit theory diagrams of the utility model circuit for controlling speed of fan.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
As shown in drawings, a kind of circuit for controlling speed of fan of the utility model, comprise thermistor RT and fan FAN, it also comprises voltage regulator U1 and resistance R 1, described voltage regulator U1, fan FAN are connected on the positive and negative electrode input end of power supply, just the positive pole of power supply is connected with the IN end of voltage regulator U1, and its OUT end is connected with the positive pole of fan FAN, and the negative pole of fan is connected with the negative pole of power supply; The end of described thermistor RT is connected with the ADJ of voltage regulator U1 end, and its other end is connected with the negative pole of power supply; One end of described resistance R 1 is connected with the OUT of voltage regulator U1 end, and its other end is connected with the ADJ end of voltage regulator U1.RT with the thermistor of positive temperature coefficient (temperature raise time after. resistance will become big).
Described circuit for controlling speed of fan also comprises a capacitor C 1, and described capacitor C 1 is connected in parallel on the positive and negative electrode input end of power supply, and just an end of capacitor C 1 is connected with the positive pole of power supply, and its other end is connected with the negative pole of power supply.
The model of described voltage regulator U1 is LM317, is produced by National Semiconductor.
Working principle of the present utility model is: the resistance of .RT just becomes big when temperature rises, and the output voltage V out of voltage regulator U1 just raises, and fan FAN is because of high faster rotational speed on the voltage; When temperature decline, the resistance of RT just diminishes, and the output voltage V out of voltage regulator U1 just reduces, and FAN slows down because of voltage decline rotating speed.Reach the rotating speed of regulating fan FAN with variation of ambient temperature like this.
Electronic parts and components such as capacitor C 1, resistance R 1 and electric fan FAN that the utility model uses are the product that market can have been bought.
Claims (3)
1, a kind of circuit for controlling speed of fan comprises thermistor RT and fan FAN, it is characterized in that: it also comprises voltage regulator U1 and resistance R 1, and described voltage regulator U1, fan FAN are connected on the positive and negative electrode input end of power supply; The end of described thermistor RT is connected with the ADJ of voltage regulator U1 end, and its other end is connected with the negative pole of power supply; One end of described resistance R 1 is connected with the OUT of voltage regulator U1 end, and its other end is connected with the ADJ end of voltage regulator U1.
2, circuit for controlling speed of fan according to claim 1 is characterized in that: described circuit for controlling speed of fan also comprises a capacitor C 1, and described capacitor C 1 is connected in parallel on the positive and negative electrode input end of power supply.
3, circuit for controlling speed of fan according to claim 1 is characterized in that: the model of described voltage regulator U1 is LM317.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201218732U CN201433925Y (en) | 2009-06-04 | 2009-06-04 | Fan speed control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201218732U CN201433925Y (en) | 2009-06-04 | 2009-06-04 | Fan speed control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201433925Y true CN201433925Y (en) | 2010-03-31 |
Family
ID=42052732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201218732U Expired - Fee Related CN201433925Y (en) | 2009-06-04 | 2009-06-04 | Fan speed control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201433925Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110583492A (en) * | 2019-10-21 | 2019-12-20 | 汪倩 | Livestock breeding house |
| CN113339306A (en) * | 2020-06-30 | 2021-09-03 | 鲍晨怡 | Intelligent fan capable of adaptively adjusting wind speed gear according to ambient temperature |
| CN113339308A (en) * | 2020-06-30 | 2021-09-03 | 鲍晨怡 | Digital display gear automatic regulating device of self-adaptive intelligent fan |
| CN113431799A (en) * | 2020-06-30 | 2021-09-24 | 鲍晨怡 | Temperature intelligent regulation industrial exhaust fan with interval regulation part |
-
2009
- 2009-06-04 CN CN2009201218732U patent/CN201433925Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110583492A (en) * | 2019-10-21 | 2019-12-20 | 汪倩 | Livestock breeding house |
| CN113339306A (en) * | 2020-06-30 | 2021-09-03 | 鲍晨怡 | Intelligent fan capable of adaptively adjusting wind speed gear according to ambient temperature |
| CN113339308A (en) * | 2020-06-30 | 2021-09-03 | 鲍晨怡 | Digital display gear automatic regulating device of self-adaptive intelligent fan |
| CN113431799A (en) * | 2020-06-30 | 2021-09-24 | 鲍晨怡 | Temperature intelligent regulation industrial exhaust fan with interval regulation part |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100331 Termination date: 20180604 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |