CN101320952A - Driving device of fan motor - Google Patents
Driving device of fan motor Download PDFInfo
- Publication number
- CN101320952A CN101320952A CNA2008101253011A CN200810125301A CN101320952A CN 101320952 A CN101320952 A CN 101320952A CN A2008101253011 A CNA2008101253011 A CN A2008101253011A CN 200810125301 A CN200810125301 A CN 200810125301A CN 101320952 A CN101320952 A CN 101320952A
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- electrically connected
- resistor
- reference voltage
- pulse
- controller
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- Control Of Motors That Do Not Use Commutators (AREA)
- Control Of Direct Current Motors (AREA)
Abstract
The invention provides a driving apparatus of a fan motor, connected between a pulse width modulation signal generator and a controller, including a converter, electrically connected with the pulse width modulation signal generator, wherein the converter can output a first reference voltage according to the working period of a pulse width modulation signal generated by the pulse width modulation signal generator; a reference voltage generator, electrically connected with an external power source for generating a second reference voltage according to the external power source; a comparator including a first input end electrically connected with the converter, a second input end electrically connected with the reference voltage generator and an output end electrically connected with the controller. When the first reference voltage is higher than the second reference voltage, the output end outputs a modulated driving signal to the controller to control the speed of the fan motor.
Description
The application is that denomination of invention is " drive unit of fan motor " (application number: 200510091640.9; The applying date: the dividing an application of application on August 11st, 2005).
Technical field
The present invention is about a kind of drive unit, especially a kind of drive unit that is applied to fan motor.
Background technology
See also shown in Figure 1, known technology utilizes a controller 2 to drive a fan motor 1 at present, this controller 2 can be an integrated circuit component (IC) as shown in the figure, it has different pins for a for example Hall element 3, one temperature sensor 4, electronic circuits such as one transducer 5... connect, wherein this Hall element 3 can be obtained a phase signal to input to this controller 2 from this fan motor 1, conversion one voltage signal was to input to this controller 2 after this temperature sensor 4 can utilize a thermistor 41 detected temperatures, and this transducer 5 is then mainly in order to a pulse-width signal (the PULSE WI-DTHMODULATION with the outside input; PWM) be converted to a voltage signal to input to this controller 2.
Above-mentioned controller 2 is behind the voltage signal that receives this transducer 5 and this temperature sensor 4, can produce a drive signal to drive this fan motor 1, please consult shown in Figure 2 in addition, by distinct pulse widths modulation signal under the different temperatures input to this controller the rotation speed relation table that produces of correspondence, obviously, curve shown in this relation table is a linear relationship, so the rotating speed that this pulse-width signal input 0%-100% exported during the work period under any temperature is linearity as can be known, but in the practical application, many occasions need not carried out rotating speed when system's unlatching or system standby lifting changes; In fact, for example being giant brain is just opening or during standby, and its radiator fan promptly improves rotating speed with the rising of work period of this pulse-width signal always, and the noise of its generation makes us feeling to perplex, so necessity of its improvement is arranged.
Summary of the invention
Because the above-mentioned disappearance of carrying, the present invention proposes a kind of drive unit of fan motor, it can set a reference voltage level earlier for system, and this reference voltage level is corresponding to a work period reference value, magnitude of voltage after the work period conversion of this pulse-width signal of outside input is greater than this reference voltage level, then this controller beginning to after should the outside input work period do increasing on the rotating speed, if the magnitude of voltage after its conversion is less than this reference voltage level, then this controller is kept a fixedly low speed output, have lower rotating speed in the time of so can making system's unlatching or system standby, and the excessive noise of unlikely generation.
According to above-mentioned purpose, the drive unit of a kind of fan motor of the present invention, it comprises: a transducer is electrically connected on a pulse-duration modulation signal generator, this transducer can be according to the work period of the pulse-width signal that this pulse-duration modulation signal generator produced, and exports one first reference voltage; One reference voltage generator is electrically connected on an external power source, and produces one second reference voltage according to this external power source; One comparator, include a first input end, one second input and an output, this first input end is electrically connected this transducer, this second input is electrically connected this reference voltage generator, this output then is electrically connected a controller, after this first reference voltage is higher than this second reference voltage, this output export a drive signal to this controller to control the rotating speed of this fan motor.
For above and other objects of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below.
Description of drawings
Fig. 1 is the circuit diagram of known fan motor.
Fig. 2 is the performance diagram during according to the drives of Fig. 1.
Fig. 3 is the calcspar of drive unit of the present invention.
Fig. 4 is the circuit diagram of drive unit of the present invention.
Fig. 5 is the oscillogram of each reference point among Fig. 4.
Fig. 6 is the performance diagram of corresponding diagram 5.
The main element symbol description
1 fan motor, 2 controllers
3 Hall elements, 4 temperature sensors
5 transducers, 6 drive units
61 transducers, 62 reference voltage generators
63 comparators, 631 first input ends
632 second inputs, 633 outputs
7 pulse-duration modulation signal generators, 8 external power sources
S
PwmPulse-width signal V
Ref1First reference voltage
V
Ref2The second reference voltage S
DriDrive signal
R1 first resistor R 2 second resistors
R3 the 3rd resistor R 4 the 4th resistor
R5 the 5th resistor C capacitor
The Q1 first switch element Q2 second switch element
G grid D drain electrode
S source electrode P1 first reference point
The P2 second reference point P3 the 3rd reference point
Embodiment
Please refer to Fig. 3, calcspar for a preferred embodiment of the present invention, drive unit 6 of the present invention shown in the figure, it is connected electrically between a pulse-duration modulation signal generator 7 and the controller 2, and it mainly is made up of a transducer 61, a reference voltage generator 62 and a comparator 63.
This transducer 61 is electrically connected to this pulse-duration modulation signal generator 7, the pulse-width signal S that this transducer 61 can be produced according to this pulse-duration modulation signal generator 7
PwmWork period (0%-100%), and one first corresponding reference voltage V of output
Ref1
This reference voltage generator 62 is electrically connected to an external power source 8, and it can produce one second reference voltage V according to this external power source 8
Ref2
This comparator 63 includes a first input end 631, one second input 632 and an output 633, this first input end 631 is electrically connected to this transducer 61, this second input 632 is electrically connected to this reference voltage generator 62, and 633 of this outputs are electrically connected to this controller 2.
As above-mentioned this first reference voltage V
Ref1Be lower than this second reference voltage V
Ref2The time, the output of the output no signal of this comparator 63, and this controller 2 keeps the fixedly low speed of this fan motor 1 voluntarily according to a low speed set point, and as this first reference voltage V
Ref1Be higher than this second reference voltage V
Ref2After, the output 633 outputs one drive signal S of this comparator 63
DriTo this controller 2, and this controller 2 is able to according to this drive signal S
DriModulation and control the rotation speed change of this fan motor 1.
Please consult Fig. 4 again, circuit diagram for the present invention's one preferable enforcement, wherein this controller 2 can be embodied as an integrated circuit component (IC), and it has a plurality of pins and connects for electronic circuits such as a Hall element 3, a temperature sensor 4, this drive unit 6..., wherein the function of this Hall element 3 and this temperature sensor 4 in prior art, chatted and, so do not give unnecessary details in addition.
In the present embodiment, the transducer 61 of this drive unit 6 can be embodied as a charge-discharge circuit, it is mainly by one first resistor R 1, one second resistor R 2, one the 3rd resistor R 3, one capacitor C, one first a switch element Q1 and a second switch element Q2 form, wherein this first switch element Q1 and this second switch element Q2 are a transistor in present embodiment, be in particular a metal-oxide semiconductor (MOS) (MOSFET), the grid G of this first switch element Q1 is electrically connected to this pulse-duration modulation signal generator 7, and the grid G of this second switch element Q2 then is electrically connected to the drain D of this first switch element Q1; The one source pole S of the one source pole S of this first switch element Q1 and this second switch element Q2 then is electrically connected to an earth terminal jointly; One first end of this first resistor R 1 is electrically connected to this pulse-duration modulation signal generator 7 and an external power source 8, and one second end of this first resistor R 1 then is electrically connected to the drain D of this first switch element Q1; One first end of this second resistor R 2 is electrically connected to the drain D of this second switch element Q2, and one second end of this second resistance R 2 is electrically connected to one second end of the 3rd resistor R 3, and one first end of the 3rd resistor R 3 is electrically connected to this first end of this first resistor R 1; One first end of this capacitor C is electrically connected to this second end of the 3rd resistor R 3, and one second end of this capacitor C then is electrically connected to this earth terminal.
In the present embodiment, the reference voltage generator 62 of this drive unit 6 can be embodied as a voltage divider, it is made up of one the 4th resistor R 4 and one the 5th resistor R 5, wherein one first end of the 4th resistance R 4 is electrically connected to this first end of the 3rd resistor R 3, to obtain this external power source 8, one second end of the 4th resistor R 4 then is electrically connected to one first end of the 5th resistor R 5, and one second end of the 5th resistor R 5 is to be electrically connected to this earth terminal.
In the present embodiment, the comparator 63 of this drive unit 6 comprises a positive input terminal (+) (i.e. this second input 632), a negative input end (-) (i.e. this first input end 631) and an output 633, this positive input terminal (+) is electrically connected to one the 3rd reference point P3 between the 4th resistor R 4 and the 5th resistor R 5, this negative input end (-) then is electrically connected to one second reference point P2 between the 3rd resistor R 3 and this capacitor C, the output 633 of this comparator 63 then is defined as one first reference point P1 at this, and it is electrically connected to this controller 2.
Please cooperate Fig. 5 and shown in Figure 6, type of drive of the present invention is as described below:
In better embodiment of the present invention, these pulse-duration modulation signal generator 7 inputs one pulse-width signal S
PwmTo this transducer 61, and via the element characteristic of this first switch element Q1 and this second switch element Q2 so that this capacitor C is made a charging operations, and as the charge value of capacitor C (i.e. this first reference voltage level V
Ref1) to surpassing this second reference voltage level V that 62 dividing potential drops of this reference voltage generator produce
Ref2The time (just the value of this negative input end (-) of this comparator 63 is greater than the value of this positive input terminal (+)), this comparator 63 can be by this output 633 outputs one drive signal S
DriTo this fan motor 1, and make this fan motor 1 according to this drive signal S
DriSize and make the high low modulation of rotating speed.
In Fig. 5, list the oscillogram of this first reference point P1, this second reference point P2 and the 3rd reference point P3 among Fig. 4 respectively, and cooperate shown in Figure 6, this pulse-width signal S
PwmWork period by between 0% to 20%, the signal that this comparator 63 is exported is all high potential, just this controller 2 only exports this fan motor 1 to by the fixing low-speed running signal that inside sets, and make this fan motor 1 keep the running of a low speed (also can be described as the running of a base speed), only as this pulse-width signal S
PwmWork period exceeded 20%, then this comparator 63 is exported is electronegative potential, and this moment, this controller 63 can be according to this pulse-width signal S
PwmWork period so that this fan motor 1 is carried out the control of rotation speed change.
It should be noted that in addition, it keeps the output of this low-speed running signal this controller 2 in the present embodiment when high potential, and change the CRANK PULSES of exporting different rotating speeds with the variation of work period during electronegative potential into, only at this also replaceable another controller, above-mentioned control mode is oppositely to implement and make.
Anotherly it should be noted that transducer 62 of the present invention also can be embodied as an A/D conversion circuit, it also can be with this pulse-width signal S
PwmBe converted to the first reference voltage V of a numeral
Ref1, and this second reference voltage V
Ref2Also can be from the oscillating circuit of these controller 2 inside and produce.
Setting via drive unit 6 of the present invention, system end can be earlier via this reference voltage generator 62 to set a magnitude of voltage (corresponding to a predefined work period), and make this system end before the work period of this setting, keep a fixing low-speed running, thus, the rotating speed of system end when unlatching or standby can remain on low speed, and effectively reduce the generation of noise, even can reach the waste that reduces energy, so be a splendid designer.
The above only is exemplary, but not is restricted.Anyly do not break away from spirit of the present invention and category, and, all should be contained in the claim scope that is proposed its equivalent modifications of carrying out or change.
Claims (14)
1. the rotating-speed control circuit of a fan motor, it comprises:
One pulse-duration modulation signal generator;
One controller; And
One drive unit is electrically connected between this pulse-duration modulation signal generator and this controller, and wherein this drive unit comprises:
One transducer is electrically connected on this pulse-duration modulation signal generator, and this transducer is according to a pulse-width signal that this pulse-duration modulation signal generator produced and export one first reference voltage;
One reference voltage generator is electrically connected on an external power source, and produces one second reference voltage according to this external power source; And
One comparator is electrically connected on this transducer and this reference voltage generator respectively, wherein works as this first reference voltage greater than this second reference voltage, and this comparator output one drive signal that can modulate is to this controller, to control the rotation speed change of this fan motor.
2. the rotating-speed control circuit of a fan motor, it comprises:
One pulse-duration modulation signal generator;
One drive unit is electrically connected on this pulse-duration modulation signal generator, and wherein this drive unit comprises:
One transducer is electrically connected on this pulse-duration modulation signal generator, and this transducer is according to a pulse-width signal that this pulse-duration modulation signal generator produced and export one first reference voltage; And
One comparator is electrically connected on this transducer; And
One controller is electrically connected on this drive unit, and produces one second reference voltage, wherein works as this first reference voltage greater than this second reference voltage, and this comparator output one drive signal that can modulate is to this controller, to control the rotation speed change of this fan motor.
3. rotating-speed control circuit as claimed in claim 1 or 2, wherein this controller is an integrated circuit.
4. rotating-speed control circuit as claimed in claim 1 or 2, wherein this controller also is electrically connected on a Hall subassembly, and this fan motor is obtained a phase place ripple signal certainly, to input to this controller.
5. rotating-speed control circuit as claimed in claim 1 or 2, wherein this controller also is electrically connected on a temperature sensor, and conversion output one voltage signal is to this controller after detected temperatures.
6. rotating-speed control circuit as claimed in claim 1 or 2, when wherein this first reference voltage was not higher than this second reference voltage, this controller slowly ran to drive this fan motor according to a low speed set point.
7. rotating-speed control circuit as claimed in claim 1 or 2, wherein this transducer is a charge-discharge circuit.
8. rotating-speed control circuit as claimed in claim 7, wherein this charge-discharge circuit is made up of one first resistor, one second resistor, one the 3rd resistor, a capacitor, one first switch module and a second switch assembly.
9. rotating-speed control circuit as claimed in claim 8, wherein this first switch module and this second switch assembly are a transistor.
10. rotating-speed control circuit as claimed in claim 8, wherein a grid of this first switch module is electrically connected on this pulse-duration modulation signal generator, and a grid of this second switch assembly is electrically connected on a drain electrode of this first switch module; The one source pole of the one source pole of this first switch module and this second switch assembly is electrically connected on an earth terminal.
11. rotating-speed control circuit as claimed in claim 8, wherein an end of this first resistor is electrically connected on this pulse-duration modulation signal generator, and the other end of this first resistor is electrically connected on a drain electrode of this first switch module; One end of this second resistor is electrically connected on a drain electrode of this second switch assembly, and its other end is electrically connected on an end of the 3rd resistor; The other end of the 3rd resistor is electrically connected on this first resistor; One end of this capacitor is electrically connected on the 3rd resistor, and its other end is electrically connected on an earth terminal.
12. rotating-speed control circuit as claimed in claim 1, wherein this reference voltage generator is a voltage divider, formed by one the 4th resistor and one the 5th resistor, wherein an end of the 4th resistor is electrically connected on the 3rd resistor, use and obtain this external power source, and its other end is electrically connected on the 5th resistor, and an end of the 5th resistor is electrically connected on an earth terminal.
13. rotating-speed control circuit as claimed in claim 1 or 2, wherein this comparator comprises a positive input terminal, a negative input end and an output, wherein this positive input terminal is electrically connected between the 4th resistor and the 5th resistor, and this negative input end is electrically connected between the 3rd resistor and this capacitor.
14. rotating-speed control circuit as claimed in claim 1 or 2, wherein this transducer is an A/D conversion circuit, is this first reference voltage of a numeral with this pulse width modulated signal conversion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101253011A CN101320952A (en) | 2005-08-11 | 2005-08-11 | Driving device of fan motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101253011A CN101320952A (en) | 2005-08-11 | 2005-08-11 | Driving device of fan motor |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100916409A Division CN100417002C (en) | 2005-08-11 | 2005-08-11 | Drive device of fan moter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101320952A true CN101320952A (en) | 2008-12-10 |
Family
ID=40180840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101253011A Pending CN101320952A (en) | 2005-08-11 | 2005-08-11 | Driving device of fan motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101320952A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003400A (en) * | 2010-12-28 | 2011-04-06 | 易事特电力系统技术有限公司 | Direct current fan speed regulation and fault sensing circuit |
| CN102444602A (en) * | 2010-10-11 | 2012-05-09 | 台达电子工业股份有限公司 | Fan rotational speed control device |
| CN103683944A (en) * | 2012-09-21 | 2014-03-26 | 台达电子工业股份有限公司 | Voltage supplying system and current transformer thereof and voltage adjustment method |
-
2005
- 2005-08-11 CN CNA2008101253011A patent/CN101320952A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102444602A (en) * | 2010-10-11 | 2012-05-09 | 台达电子工业股份有限公司 | Fan rotational speed control device |
| CN102444602B (en) * | 2010-10-11 | 2015-05-13 | 台达电子工业股份有限公司 | Fan rotational speed control device |
| CN102003400A (en) * | 2010-12-28 | 2011-04-06 | 易事特电力系统技术有限公司 | Direct current fan speed regulation and fault sensing circuit |
| CN102003400B (en) * | 2010-12-28 | 2013-01-30 | 易事特电力系统技术有限公司 | Direct current fan speed regulation and fault sensing circuit |
| CN103683944A (en) * | 2012-09-21 | 2014-03-26 | 台达电子工业股份有限公司 | Voltage supplying system and current transformer thereof and voltage adjustment method |
| CN103683944B (en) * | 2012-09-21 | 2016-09-14 | 台达电子工业股份有限公司 | Voltage supply system and current transformer therein and voltage adjusting method |
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Open date: 20081210 |