CN2554866Y - Driver circuit of computer controlled variable speed D.C. brushless fan - Google Patents
Driver circuit of computer controlled variable speed D.C. brushless fan Download PDFInfo
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- CN2554866Y CN2554866Y CN02271290U CN02271290U CN2554866Y CN 2554866 Y CN2554866 Y CN 2554866Y CN 02271290 U CN02271290 U CN 02271290U CN 02271290 U CN02271290 U CN 02271290U CN 2554866 Y CN2554866 Y CN 2554866Y
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Abstract
The utility model relates to the technical field of computer fans, which comprises four parts of a bleeder circuit, a comparison and amplification circuit, a winding pulse amplitude control circuit, and a winding operating monitoring circuit, which are connected successively, wherein, an INPUT 1 feeds in a 12 V power voltage, an INPUT 2 feeds in the voltage signal of a computer system, the collecting electrode of a transistor Q 1 cuts in the INPUT 1, the base electrode of the transistor Q 1 cuts in the INPUT 2, the load resistance of the collecting electrode of the transistor Q 1 is of two groups of resistances including a resistance R 4 and a resistance R 5 which are connected in parallel; the collecting electrode of a transistor Q 2 is connected between the R 4 and the R 5 through a load resistance R 6, the base electrode of the transistor Q 2 is connected between a series resistance R 1 and a series resistance R 2 which cut in the INPUT 2; a Hall element I C with four legs is connected in series between the collecting electrode of a transistor Q 3 and the INPUT 1, two legs of the Hall element I C are respectively connected with the INPUT 1 and the collecting electrode of the transistor Q 2, the other two legs are respectively connected with the output terminals of a winding L 1 and a winding L 2; the base electrode of the transistor Q 2 is connected with the load resistance R 6 of the transistor Q 2. Thus, the motor rotating speed of the fan can be controlled by the computer system circuit. The utility model can adjust the fan speed at three different speed sections by respectively selecting the different resistance values of the R 4, the R 5, and the R 6.
Description
Technical field:
The utility model relates to the computer fan technical field, but refers in particular to the drive circuit of brush DC fan of three sections speed changes of a kind of computer control.
Background technology:
Speed change brush DC fan in the market is mainly used in the computer system heat radiation, it and computer system circuit are not contacted directly, the rotating speed of the uncontrollable fan of computer system circuit, it all is to be confined at thermistor of fan power supply input series connection, the thermistor power consumption is big, and rotation speed of the fan is very little with the variation of temperature amount, and fan can lose the part energy consumption in vain like this.
Summary of the invention:
The purpose of this utility model is that fan is connected with the computer system circuit, and the rotating speed of fan can be regulated rotating speed with variation of temperature, and can be adjusted three friction speed sections by the control of computer system circuit, and then saves energy consumption.
The utility model is achieved by the following technical solution: the drive circuit of the speed change brush DC fan of computer control, it is characterized in that: it comprises bleeder circuit, comparison amplifying circuit, winding pulse amplitude control circuit, winding work observation circuit four parts, and according to above-mentioned order connection, three partial circuits in back all have direct current amplifier, wherein:
INPUT1 input 12V supply voltage in the bleeder circuit, INPUT2 input computer system voltage signal, INPUT2 is connected with series resistance R1, R2;
The collector electrode of transistor Q1 inserts INPUT1 in comparing amplifying circuit, and base electrode inserts INPUT2, and the load resistance of the collector electrode of transistor Q1 is two groups of resistance R 4, R5 parallel connection; The collector electrode of transistor Q2 inserts and is connected between R4, the R5 by load resistance R6, and base electrode is connected between series resistance R1, the R2 of INPUT2;
In winding pulse amplitude control circuit, be connected in series the Hall element IC of four pin between the collector electrode of transistor Q3 and the INPUT1, wherein two pin of Hall element IC are connected with the collector electrode of transistor Q2 with INPUT1 respectively, and all the other 2 pin are connected with 2 winding L 1 of motor and the output of L2 respectively; Capacitor C 1, C2 are connected in series with motor windings L1, L2 respectively, the surging that produces when absorbing motor windings L1, L2 work as filter capacitor; The base stage of transistor Q2 is connected on the load resistance R6 of transistor Q2 in the comparison amplifying circuit (2);
Winding work observation circuit is connected on the output of winding L 2.Operating current situation for the testing of electric motors winding, the base stage of transistor Q4 is connected on the output of motor windings L2 by resistance R 7, when machine operation, transistor Q4 is output as a square-wave signal, and square-wave signal raises with rotating speed and increases, when fan stopped, transistor Q3 exported a straight ripple.
Bleeder circuit of the present utility model is given relatively, and amplifying circuit provides constant voltage and computer system voltage signal respectively, relatively amplifying circuit provides different bias currents for winding pulse amplitude control circuit under the control of computer system voltage signal, winding pulse amplitude control circuit provides operating current to motor, the operating current of winding work monitoring circuit monitors winding pulse amplitude control circuit, the motor speed of fan just can be controlled by the computer system circuit like this.By selecting the resistance size of R4, R5, R6 respectively, can adjust fan speed three friction speed sections.The computer system circuit can vary with temperature corresponding adjustment rotation speed of the fan, thereby saves energy consumption.
Description of drawings:
Fig. 1 is a circuit block diagram of the present utility model.
Fig. 2 is circuit theory diagrams of the present utility model.
Embodiment:
See shown in the accompanying drawing 1～2, the drive circuit of the speed change brush DC fan of computer control, comprise bleeder circuit (1), compare amplifying circuit (2), winding pulse amplitude control circuit (3), winding work observation circuit (4) four parts, and according to above-mentioned order connection, three partial circuits in back all have direct current amplifier, wherein:
INPUT1 input 12V supply voltage in the bleeder circuit (1), INPUT2 input computer system voltage signal, INPUT2 is connected with series resistance R1, R2;
The collector electrode of transistor Q1 inserts INPUT1 in comparing amplifying circuit (2), and base electrode inserts INPUT2, and the load resistance of the collector electrode of transistor Q1 is two groups of resistance R 4, R5 parallel connection, and R4 and R5 are as the biasing resistance of transistor Q3; The collector electrode of transistor Q2 inserts and is connected between R4, the R5 by load resistance R6, and base electrode is connected between series resistance R1, the R2 of INPUT2, and R1 and R2 are as the biasing resistance of transistor Q2;
In winding pulse amplitude control circuit (3), be connected in series the Hall element IC of four pin between the collector electrode of transistor Q3 and the INPUT1, wherein two pin of Hall element IC are connected with the collector electrode of transistor Q2 with INPUT1 respectively, and all the other 2 pin are connected with 2 winding L 1 of motor and the output of L2 respectively; Capacitor C 1, C2 are connected in series as filter capacitor with motor windings L1, L2 respectively, the surging that produces when absorbing motor windings L1, L2 work; The base stage of transistor Q2 is connected on the load resistance R6 of transistor Q2 in the comparison amplifying circuit (2);
Winding work observation circuit (4) is connected on the output of winding L 2.
After INPUT1 input supply voltage 12V is stable, when INPUT2 is 0V, V
B1, V
B2All be lower than 0.7V, this moment, Q1, Q2 were in cut-off state, and the bias current of Q3 is provided by R4, suitably adjusts the R4 size, makes Q3 be in saturation condition, and Q3 provides maximum current to fan winding L 1, L2, makes fan be in maximum speed;
When INPUT2 is 1V, V
B1＞0.7V, V
B2＜0.7V, this moment, Q2 ended, and suitably adjusted the resistance of R5, made Q1 be in the saturation conduction state, and the R5 shunting makes Q3 be in magnifying state, at this moment can reduce the electric current that Q3 offers the fan winding by selecting R5 resistance size, reduces the rotating speed of fan;
When INPUT2 is 1.6V, V
B1, V
B2All greater than 0.7V, make Q1, Q2 all be in saturation condition, when the Q2 saturation conduction, the R4 size is adjusted in the R6 shunting, reduces the Q3 base current, and the electric current that makes Q3 offer fan reduces once more, and the rotating speed of fan has also just lowered.
Bleeder circuit (1) is given relatively, and amplifying circuit (2) provides constant voltage and computer system voltage signal respectively, relatively amplifying circuit (2) provides different bias currents for winding pulse amplitude control circuit (3) under the control of computer system voltage signal, winding pulse amplitude control circuit (3) provides operating current to motor, the operating current of winding work observation circuit (4) monitoring winding pulse amplitude control circuit (3), the motor speed of fan just can be controlled by the computer system voltage signal like this.And, can adjust fan speed three friction speed sections by selecting the resistance size of R4, R5, R6 respectively.The computer system circuit can vary with temperature corresponding adjustment rotation speed of the fan, thereby saves energy consumption.
Claims (2)
1. the drive circuit of the speed change brush DC fan of computer control, it is characterized in that: it comprises bleeder circuit (1), compares amplifying circuit (2), winding pulse amplitude control circuit (3), winding work observation circuit (4) four parts, and according to above-mentioned order connection, three partial circuits in back all have direct current amplifier, wherein:
INPUT1 input 12V supply voltage in the bleeder circuit (1), INPUT2 input computer system voltage signal, INPUT2 is connected with series resistance R1, R2;
The collector electrode of transistor Q1 inserts INPUT1 in comparing amplifying circuit (2), and base electrode inserts INPUT2, and the load resistance of the collector electrode of transistor Q1 is two groups of resistance R 4, R5 parallel connection; The collector electrode of transistor Q2 inserts and is connected between R4, the R5 by load resistance R6, and base electrode is connected between series resistance R1, the R2 of INPUT2;
In winding pulse amplitude control circuit (3), be connected in series the Hall element IC of four pin between the collector electrode of transistor Q3 and the INPUT1, wherein two pin of Hall element IC are connected with the collector electrode of transistor Q2 with INPUT1 respectively, and all the other 2 pin are connected with 2 winding L 1 of motor and the output of L2 respectively; The base stage of transistor Q2 is connected on the load resistance R6 of transistor Q2 in the comparison amplifying circuit (2);
Winding work observation circuit (4) is connected on the output of winding L 2.
2. the drive circuit of the speed change brush DC fan of computer control as claimed in claim 1 is characterized in that: capacitor C 1, C2 are connected in series with motor windings L1, L2 respectively in the winding pulse amplitude control circuit (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02271290U CN2554866Y (en) | 2002-06-20 | 2002-06-20 | Driver circuit of computer controlled variable speed D.C. brushless fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02271290U CN2554866Y (en) | 2002-06-20 | 2002-06-20 | Driver circuit of computer controlled variable speed D.C. brushless fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2554866Y true CN2554866Y (en) | 2003-06-04 |
Family
ID=33736178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN02271290U Expired - Fee Related CN2554866Y (en) | 2002-06-20 | 2002-06-20 | Driver circuit of computer controlled variable speed D.C. brushless fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2554866Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100377491C (en) * | 2004-10-30 | 2008-03-26 | 鸿富锦精密工业（深圳）有限公司 | DC fan self-starting circuit |
| CN100426637C (en) * | 2003-08-16 | 2008-10-15 | 鸿富锦精密工业（深圳）有限公司 | Direct-current brushless motor |
| CN102400933A (en) * | 2010-09-17 | 2012-04-04 | 鸿富锦精密工业（深圳）有限公司 | Fan drive circuit |
| CN103291636A (en) * | 2012-03-02 | 2013-09-11 | 纬创资通股份有限公司 | Fan control device, fan control method and heat dissipation system |
-
2002
- 2002-06-20 CN CN02271290U patent/CN2554866Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100426637C (en) * | 2003-08-16 | 2008-10-15 | 鸿富锦精密工业（深圳）有限公司 | Direct-current brushless motor |
| CN100377491C (en) * | 2004-10-30 | 2008-03-26 | 鸿富锦精密工业（深圳）有限公司 | DC fan self-starting circuit |
| CN102400933A (en) * | 2010-09-17 | 2012-04-04 | 鸿富锦精密工业（深圳）有限公司 | Fan drive circuit |
| CN103291636A (en) * | 2012-03-02 | 2013-09-11 | 纬创资通股份有限公司 | Fan control device, fan control method and heat dissipation system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: XINHE PRECISE ELECTRONIC ( DONGGUAN ) CO., LTD. Free format text: FORMER OWNER: LIN KAILIN Effective date: 20071012 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20071012 Address after: Guangdong province Dongguan City Hengli Town 523460 pit Industrial Zone along the Xin He precision electronics (Dongguan) Co., Ltd. Patentee after: Xinhe Precision Electronics (Dongguan) Co., Ltd. Address before: 518001 national defence trust building, Hongling Middle Road, Shenzhen, Guangdong Province, room 1407 Patentee before: Lin Kailin |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030604 Termination date: 20110620 |