CN104595227A - Speed regulating control circuit of pulse-width-modulation computer cooling fan - Google Patents
Speed regulating control circuit of pulse-width-modulation computer cooling fan Download PDFInfo
- Publication number
- CN104595227A CN104595227A CN201310529434.6A CN201310529434A CN104595227A CN 104595227 A CN104595227 A CN 104595227A CN 201310529434 A CN201310529434 A CN 201310529434A CN 104595227 A CN104595227 A CN 104595227A
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- China
- Prior art keywords
- resistance
- comparator
- potentiometer
- resistor
- vibrator
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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.)
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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
- F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
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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
- F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
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- 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
- F05D2270/01—Purpose of the control system
- F05D2270/02—Purpose of the control system to control rotational speed (n)
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- 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
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- 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
- F05D2270/50—Control logic embodiments
- F05D2270/54—Control logic embodiments by electronic means, e.g. electronic tubes, transistors or IC's within an electronic circuit
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The invention discloses a speed regulation control circuit of a pulse-width-modulation computer cooling fan. The speed regulation control circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a first capacitor, a second capacitor, a first potentiometer, a second potentiometer, a first comparator, a second comparator, a third comparator, a thermistor, a light-emitting diode, an audion, a multivibrator and the fan. The speed regulating control circuit of the pulse-width-modulation computer cooling fan is a control circuit achieving automatic speed regulating through a pulse-width-modulation cooling fan motor, and the speed of the fan can be automatically regulated according to the temperature inside an instrument; the same-phase input end of the first comparator is connected with the thermistor; and when the potential of the same-phase input end of the first comparator drops due to temperature rising, the output voltage of the first comparator also drops, the duty ratio of the output waveform of the second comparator is improved, and the rotating speed of the fan is increased through the audion.
Description
Technical field
The present invention relates to a kind of speed-regulating control circuit, particularly relate to a kind of speed-regulating control circuit adopting the radiating fan for computer of pulsewidth modulation.
Background technique
Computer is as present people's life and indispensable instrument in work, normal operation is the prerequisite condition of every platform computer, because computer is electric equipment, part electric energy can be converted to heat during its work to distribute, can have an impact to the working efficiency of computer when computer-internal is overheated, the serious electronic component that also can damage wherein, affects the normal operation of computer.
Summary of the invention
Object of the present invention is just to provide a kind of speed-regulating control circuit adopting the radiating fan for computer of pulsewidth modulation to solve the problem.
The present invention is achieved through the following technical solutions above-mentioned purpose:
Adopt a speed-regulating control circuit for the radiating fan for computer of pulsewidth modulation, comprise the first resistance, second resistance, 3rd resistance, 4th resistance, 5th resistance, 6th resistance, 7th resistance, 8th resistance, 9th resistance, tenth resistance, 11 resistance, 12 resistance, first electric capacity, second electric capacity, first potentiometer, second potentiometer, first comparator, second comparator, 3rd comparator, thermistor, light emitting diode, triode, multi-vibrator and fan, the external capacitor end of described multi-vibrator is connected with the first end of described second electric capacity, the outer meeting resistance electric capacity common port of described multi-vibrator is connected with the second end of described 9th resistance and the second end of described second electric capacity respectively, the outer meeting resistance end of described multi-vibrator is connected with the first end of described 9th resistance, the positive power source terminal of described multi-vibrator is connected with the first end of described 8th resistance, the second end of described 8th resistance respectively with the second end of described first potentiometer, second end of described tenth resistance, second end of described 12 resistance, the first end of described fan, second end of described first resistance, the cathode voltage end of described 3rd comparator is connected with external voltage end, the input end of described multi-vibrator respectively with the heavy trigger input of described multi-vibrator, the first end of described first electric capacity, the first end of described thermistor, the first end of described second resistance, the negative electricity pressure side of described second comparator, the emitter of described triode, the first end of described 4th resistance is connected with the negative pole of described light emitting diode, the cathode voltage end ground connection of described 3rd comparator, the unsteady state multi-harmonic-oscillations output terminal of described multi-vibrator is connected with the second end of described 6th resistance, the first end of described 6th resistance is connected with the second end of described first electric capacity and the inverting input of described second comparator respectively, second end of described thermistor is connected with the first end of described 7th resistance and the inverting input of described first comparator respectively, second end of described 7th resistance is connected with the first end of described first potentiometer and the sliding end of described first potentiometer respectively, the second end of described second resistance respectively with the first end of described tenth resistance, the first end of described 11 resistance is connected with the normal phase input end of described first comparator, the second end of described 11 resistance respectively with the normal phase input end of described 3rd comparator, the output terminal of described first comparator is connected with the normal phase input end of described second comparator, the cathode voltage end of described second comparator is connected with the first end of described 12 resistance, the output terminal of described second comparator is connected with the second end of described 3rd resistance, the first end of described 3rd resistance is connected with the base stage of described triode, the emitter of described triode is connected with the second end of described fan, second end of described 4th resistance is connected with the first end of described second potentiometer, second end of described second potentiometer is connected with the first end of described first resistance, the sliding end of described second potentiometer is connected with the normal phase input end of described 3rd comparator, the output terminal of described 3rd comparator is connected with the second end of described 5th resistance, the first end of described 5th resistance is connected with the positive pole of described light emitting diode.
Beneficial effect of the present invention is:
The present invention adopts the speed-regulating control circuit of the radiating fan for computer of pulsewidth modulation, it is a control circuit with the radiator fan motor automatic speed regulation of pulsewidth modulation, it can adjust fan speed automatically according to the temperature height in instrument, the in-phase input end of the first comparator is connected to thermistor, when the in-phase input end current potential Yin Wendu of the first comparator raises and declines, the output voltage of the first comparator also declines, then the dutycycle of the second comparator output waveform improves, and makes rotation speed of the fan increase after triode.
Accompanying drawing explanation
Fig. 1 is the circuit diagram that the present invention adopts the speed-regulating control circuit of the radiating fan for computer of pulsewidth modulation.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1, the present invention adopts the speed-regulating control circuit of the radiating fan for computer of pulsewidth modulation, comprises the first resistance R1, second resistance R2, 3rd resistance R3, 4th resistance R4, 5th resistance R5, 6th resistance R6, 7th resistance R7, 8th resistance R8, 9th resistance R9, tenth resistance R10, 11 resistance R11, 12 resistance R12, first electric capacity C1, second electric capacity C2, first potentiometer RP1, second potentiometer RP2, first comparator A1, second comparator A2, 3rd comparator A3, thermistor RT, LED, triode VT, multi-vibrator IC and fan M, the external capacitor end of multi-vibrator IC is connected with the first end of the second electric capacity C2, the outer meeting resistance electric capacity common port of multi-vibrator IC is connected with second end of the 9th resistance R9 and second end of the second electric capacity C2 respectively, the outer meeting resistance end of multi-vibrator IC is connected with the first end of the 9th resistance R9, the positive power source terminal of multi-vibrator IC is connected with the first end of the 8th resistance R8, second end of the 8th resistance R8 respectively with second end of the first potentiometer RP1, second end of the tenth resistance R10, second end of the 12 resistance R12, the first end of fan M, second end of the first resistance R1, the cathode voltage end of the 3rd comparator A3 is connected with external voltage end, the input end of multi-vibrator IC respectively with the heavy trigger input of multi-vibrator IC, the first end of the first electric capacity C1, the first end of thermistor RT, the first end of the second resistance R2, the negative electricity pressure side of the second comparator A2, the emitter of triode VT, the first end of the 4th resistance R4 is connected with the negative pole of LED, the cathode voltage end ground connection of the 3rd comparator A3, the unsteady state multi-harmonic-oscillations output terminal of multi-vibrator IC is connected with second end of the 6th resistance R6, the first end of the 6th resistance R6 is connected with second end of the first electric capacity C1 and the inverting input of the second comparator A2 respectively, second end of thermistor RT is connected with the first end of the 7th resistance R7 and the inverting input of the first comparator A1 respectively, second end of the 7th resistance R7 is connected with the first end of the first potentiometer RP1 and the sliding end of the first potentiometer RP1 respectively, second end of the second resistance R2 respectively with the first end of the tenth resistance R10, the first end of the 11 resistance R11 is connected with the normal phase input end of the first comparator A1, second end of the 11 resistance R11 respectively with the normal phase input end of the 3rd comparator A3, the output terminal of the first comparator A1 is connected with the normal phase input end of the second comparator A2, the cathode voltage end of the second comparator A2 is connected with the first end of the 12 resistance R12, the output terminal of the second comparator A2 is connected with second end of the 3rd resistance R3, the first end of the 3rd resistance R3 is connected with the base stage of triode VT, the emitter of triode VT is connected with second end of fan M, second end of the 4th resistance R4 is connected with the first end of the second potentiometer RP2, second end of the second potentiometer RP2 is connected with the first end of the first resistance R1, the sliding end of the second potentiometer RP2 is connected with the normal phase input end of the 3rd comparator A3, the output terminal of the 3rd comparator A3 is connected with second end of the 5th resistance R5, and the first end of the 5th resistance R5 is connected with the positive pole of LED.
The present invention adopts the working principle of the speed-regulating control circuit of the radiating fan for computer of pulsewidth modulation as follows:
This circuit is the circuit that the fan electromotor automatic speed regulation by pulsewidth modulation controls, and it can according to the adjustment fan M rotating speed automatically of the temperature height in instrument.Multi-vibrator IC produces square wave, and square wave obtains pyramidal wave after resistance capacitance Integral Processing, and the in-phase input end of the first comparator A1 is connected to the thermistor RT of negative temperature coefficient, and by the first potentiometer RP1 setup control scope.When the in-phase input end current potential Yin Wendu of the first comparator A1 raises and declines, the output voltage of the first comparator A1 also declines, then the dutycycle of the second comparator A2 output waveform improves, and accelerates the rotational velocity of fan M after triode VT, and the second comparator A2 is used for detected temperatures, when temperature is too high, the voltage of its inverting input is lower than the setting voltage of in-phase input end, and the 3rd comparator A3 exports high level, lights LED, represent that fan M has fault, temperature is too high.
Claims (1)
1. adopt a speed-regulating control circuit for the radiating fan for computer of pulsewidth modulation, it is characterized in that: comprise the first resistance, second resistance, 3rd resistance, 4th resistance, 5th resistance, 6th resistance, 7th resistance, 8th resistance, 9th resistance, tenth resistance, 11 resistance, 12 resistance, first electric capacity, second electric capacity, first potentiometer, second potentiometer, first comparator, second comparator, 3rd comparator, thermistor, light emitting diode, triode, multi-vibrator and fan, the external capacitor end of described multi-vibrator is connected with the first end of described second electric capacity, the outer meeting resistance electric capacity common port of described multi-vibrator is connected with the second end of described 9th resistance and the second end of described second electric capacity respectively, the outer meeting resistance end of described multi-vibrator is connected with the first end of described 9th resistance, the positive power source terminal of described multi-vibrator is connected with the first end of described 8th resistance, the second end of described 8th resistance respectively with the second end of described first potentiometer, second end of described tenth resistance, second end of described 12 resistance, the first end of described fan, second end of described first resistance, the cathode voltage end of described 3rd comparator is connected with external voltage end, the input end of described multi-vibrator respectively with the heavy trigger input of described multi-vibrator, the first end of described first electric capacity, the first end of described thermistor, the first end of described second resistance, the negative electricity pressure side of described second comparator, the emitter of described triode, the first end of described 4th resistance is connected with the negative pole of described light emitting diode, the cathode voltage end ground connection of described 3rd comparator, the unsteady state multi-harmonic-oscillations output terminal of described multi-vibrator is connected with the second end of described 6th resistance, the first end of described 6th resistance is connected with the second end of described first electric capacity and the inverting input of described second comparator respectively, second end of described thermistor is connected with the first end of described 7th resistance and the inverting input of described first comparator respectively, second end of described 7th resistance is connected with the first end of described first potentiometer and the sliding end of described first potentiometer respectively, the second end of described second resistance respectively with the first end of described tenth resistance, the first end of described 11 resistance is connected with the normal phase input end of described first comparator, the second end of described 11 resistance respectively with the normal phase input end of described 3rd comparator, the output terminal of described first comparator is connected with the normal phase input end of described second comparator, the cathode voltage end of described second comparator is connected with the first end of described 12 resistance, the output terminal of described second comparator is connected with the second end of described 3rd resistance, the first end of described 3rd resistance is connected with the base stage of described triode, the emitter of described triode is connected with the second end of described fan, second end of described 4th resistance is connected with the first end of described second potentiometer, second end of described second potentiometer is connected with the first end of described first resistance, the sliding end of described second potentiometer is connected with the normal phase input end of described 3rd comparator, the output terminal of described 3rd comparator is connected with the second end of described 5th resistance, the first end of described 5th resistance is connected with the positive pole of described light emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310529434.6A CN104595227A (en) | 2013-10-31 | 2013-10-31 | Speed regulating control circuit of pulse-width-modulation computer cooling fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310529434.6A CN104595227A (en) | 2013-10-31 | 2013-10-31 | Speed regulating control circuit of pulse-width-modulation computer cooling fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104595227A true CN104595227A (en) | 2015-05-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310529434.6A Pending CN104595227A (en) | 2013-10-31 | 2013-10-31 | Speed regulating control circuit of pulse-width-modulation computer cooling fan |
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| CN (1) | CN104595227A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110896575A (en) * | 2019-12-17 | 2020-03-20 | 常州机电职业技术学院 | LED three-section voltage display circuit and LED display method |
| CN113864217A (en) * | 2021-09-10 | 2021-12-31 | 北京市农林科学院信息技术研究中心 | Fan speed regulation method and system |
-
2013
- 2013-10-31 CN CN201310529434.6A patent/CN104595227A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110896575A (en) * | 2019-12-17 | 2020-03-20 | 常州机电职业技术学院 | LED three-section voltage display circuit and LED display method |
| CN113864217A (en) * | 2021-09-10 | 2021-12-31 | 北京市农林科学院信息技术研究中心 | Fan speed regulation method and system |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150506 |