CN101101001B - Fan system and its switch control device - Google Patents
Fan system and its switch control device Download PDFInfo
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- CN101101001B CN101101001B CN2006101054235A CN200610105423A CN101101001B CN 101101001 B CN101101001 B CN 101101001B CN 2006101054235 A CN2006101054235 A CN 2006101054235A CN 200610105423 A CN200610105423 A CN 200610105423A CN 101101001 B CN101101001 B CN 101101001B
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Abstract
This invention is switch control device receiving an input signal and a power supply signal. It includes a control element and a switch element. The control element has a default value and receives the said input signal and power supply signal. When the input signal is smaller than the default one, control element outputs a control signal. The switch element electrically connects to control element and receives the control signal, according to which, stops to output the said power supply signal.
Description
Technical field
The present invention relates to a kind of fan system and switch controlling device thereof, particularly relate to fan system and switch controlling device thereof that whether a kind of controllable power is supplied with.
Background technique
The functional requirement of electronic equipment is more and more higher, and various accessorys are also many all the more more, and when electronic equipment during in holding state, often in order to keep quick starting state, the power supply that provides electronic equipment to use on a small quantity can be provided, but because electronic equipment is when holding state, though system decommissions, but the peripheral assembly or the circuit of electronic equipment (for example fan), also can also there be a little power supply because of electronic equipment, and power supply is received and consumes, so can influence the quality and the power consumption of electronic equipment, no exception for products such as need equipped with battery such as mobile computers.
Fan with mobile computer is an example, as shown in Figure 1, existing fan system 1 has the peripheral assembly 13 of a driving-controlling device 11, a motor 12 and a plurality of fans, and receives pulse duration modulation signal (pulse width modulation, the PWM) S of an outside input respectively
PWMAnd a power supply Vd, this driving-controlling device 11 has the default value D1 that a fan shuts down; When this mobile computer standby decommissions, this pulse duration modulation signal S
PWMBe lower than this default value D1,11 of this driving-controlling devices stop this motor 12 runnings.
Though this motor 12 has shut down, but because a spot of power supply still can be sent into this fan system 1, so described peripheral assembly 13 still continues to consume working power, when if this mobile computer is power supply with the battery, then described peripheral assembly 13 can exhaust the power supply of battery gradually, and causes this mobile computer not start immediately or to be used.
Said circumstances not only betides this mobile computer, use battery all might take place for various the need as the electronic equipment or the product of power supply source of supply, when standby or shutdown, peripheral assembly under this fan still continues to consume working power, so not only cause electronic equipment or product depleted, and can not start immediately or use because of the power supply of battery own, even more serious for the influence of the electronic equipment of paying attention to power consumption or product, except reducing utilization rate, waste power supply more.
Therefore, how to provide a kind of controllable power whether to supply with, promptly when fan stops, stopping supply power simultaneously, continue to consume the fan system and the switch controlling device thereof of working power, become one of important topic with the peripheral assembly of avoiding fan.
Summary of the invention
Because above-mentioned problem, whether purpose of the present invention is supplied with for a kind of controllable power is provided, promptly in fan low speed or even when stopping, stopping supply power simultaneously, continue to consume the fan system and the switch controlling device thereof of working power with the peripheral assembly of avoiding fan.
For achieving the above object, receive an input signal and a power signal, comprise a control unit and a switch element according to a kind of switch controlling device of the present invention.This control unit has a default value, and receives this input signal and this power signal, and when this input signal during less than this default value, this control unit is exported a pilot signal; This switch element is electrically connected with this control unit, receives and according to this pilot signal, to stop to export this power signal.
For achieving the above object, receive an input signal and a power signal, comprise a motor, a drive unit and a switch controlling device according to a kind of fan system of the present invention.This drive unit is electrically connected with this motor, receive and according to this input signal and this power signal to drive this motor; This switch controlling device is electrically connected with this drive unit, and comprising a control unit and a switch element, this control unit has a default value, and receives this input signal and this power signal, when this input signal during less than this default value, this control unit is exported a pilot signal; This switch element is electrically connected with this control unit, receives and according to this pilot signal, to stop to export this power signal.
As mentioned above, according to a kind of fan system of the present invention and switch controlling device thereof is that this input signal and this default value are directly compared, or count the conducting pulse number or the turn-on cycle number of this input signal with counting mode, compare with this default value again, in this input signal during less than this default value, make this switch controlling device judge whether to stop to export this power signal, to stop to drive this motor running to this drive unit.Compare with prior art, fan system of the present invention is by this switch controlling device relatively this input signal and this default value, when cutting off the power supply of this fan system, can stop to provide this power supply to this fan system immediately, to prevent this fan system and peripheral circuit thereof, assembly electric consumption; In addition, the present invention is constituted with the circuit of utmost point low consumpting power, so can effectively reduce the also current sinking of keyholed back plate integrated circuit, the effect that more can reach environmental protection and save electric energy.
Description of drawings
Fig. 1 is a kind of schematic representation of existing fan system;
Fig. 2 is the schematic representation according to a kind of switch controlling device of preferred embodiment of the present invention;
Fig. 3 is the switch controlling device according to preferred embodiment of the present invention, and its input signal and default value are in the schematic representation of operation cycle;
Fig. 4 is the switch controlling device according to preferred embodiment of the present invention, and wherein control unit is the schematic representation of a control circuit;
Fig. 5 is the switch controlling device according to preferred embodiment of the present invention, and wherein control unit is the schematic representation of another control circuit;
Fig. 6 is the switch controlling device according to preferred embodiment of the present invention, and wherein control unit is the schematic representation of another processor;
Fig. 7 is the switch controlling device according to preferred embodiment of the present invention, compares in the turn-on cycle schematic representation of the conducting pulse number of the pulse number of input signal and default value; And
Fig. 8 is the schematic representation according to a kind of fan system of preferred embodiment of the present invention.
The reference numeral explanation:
1,3 fan systems, 11 driving-controlling devices
12,31 motors, 13 peripheral assemblies
2,33 switch controlling devices, 21,331 control units
211 counting assemblies, 22,332 switch elements
32 drive units
The C1 first capacitor C2 second capacitor
D1, D2 default value I1 first input end
The I2 second input end OP operational amplifier
O output terminal Q1 the first transistor
Q2 transistor seconds R1 first resistor
R2 second resistor R 3 the 3rd resistor
R4 the 4th resistor R 5 the 5th resistor
R6 the 6th resistor R 7 the 7th resistor
R8 the 8th resistor R 9 the 9th resistor
R10 the tenth resistor R 11 the 11 resistor
S1 input signal S2 power signal
The S3 pilot signal
S
PWMPulse duration modulation signal Vd power supply
Embodiment
Hereinafter with reference to relevant drawings, a kind of fan system and switch controlling device thereof according to preferred embodiment of the present invention are described, wherein identical assembly will be illustrated with identical label.
Please refer to shown in Figure 2ly, a kind of switch controlling device of preferred embodiment of the present invention 2 receives the input signal S1 and a power signal S2 of an outside, and this switch controlling device 2 comprises a control unit 21 and a switch element 22.This input signal S1 of present embodiment is a pulse width modulating signal (PWM) or a count value, and this power signal S2 is a voltage or an electric current.
This control unit 21 has a default value D2, and receives this input signal S1 and this power signal S2.Please be simultaneously with reference to Fig. 2 and shown in Figure 3, in present embodiment, when this input signal S1 was the pulse duration modulation signal, this control unit 21 is this input signal S1 (Fig. 3 (a)) and this default value D2 (Fig. 3 (c)), for example comparison of working period values (duty cycle) relatively.As the value of this input signal S1 during ((b) of Fig. 3 with (c) relatively), these control unit 21 outputs one pilot signal S3 less than this default value D2.This control unit 21 is implemented to go up and is unrestricted, can be a control circuit or a processor.
Please refer to shown in Figure 4, when this control unit 21 was a control circuit, this control circuit comprised one first resistor R 1, one second resistor R 2, one the 3rd resistor R 3, one the 4th resistor R 4, a first transistor Q1, one the 5th resistor R 5 and one first capacitor C1.One termination of this first resistor R 1 is received this power signal S2, and its other end receives this input signal S1; One end of this second resistor R 2 is electrically connected with this other end of this first resistor R 1, its other end ground connection; One termination of the 3rd resistor R 3 is received this input signal S1; One termination of the 4th resistor R 4 is received this power signal S2, and is electrically connected with this end of this first resistor R 1; The grid of this first transistor Q1 is electrically connected with the other end of the 3rd resistor R 3, and its drain electrode is electrically connected its source ground with the other end of the 4th resistor R 4; One end of the 5th resistor R 5 is electrically connected with this other end of the 4th resistor R 4 and this drain electrode of this first transistor Q1; The end of this first capacitor C1 is electrically connected with the other end of the 5th resistor R 5, its other end ground connection.In present embodiment, this first resistor R 1 has the effectiveness of bias voltage with this second resistor R 2, and the 3rd resistor R 3 is as the usefulness of current limliting; Also unrestricted in this first transistor Q1 enforcement, be example then at this with a nmos pass transistor.
In addition, please refer to shown in Figure 5, when this control unit 21 was the enforcement aspect of another control circuit, this control circuit comprised one the 6th resistor R 6, one the 7th resistor R 7, one the 8th resistor R 8, one the 9th resistor R 9,1 the tenth resistor R 10,1 the 11 resistor R 11, an operational amplifier OP and one second capacitor C2.One termination of the 6th resistor R 6 is received this power signal S2, and its other end receives this input signal S1; One end of the 7th resistor R 7 is electrically connected with this other end of the 6th resistor R 6, its other end ground connection; One termination of the 8th resistor R 8 is received this power signal S2; The first input end I1 of this operational amplifier OP is electrically connected with the other end of the 8th resistor R 8, and the one second input end I2 receives this input signal S1; One end of the 9th resistor R 9 is electrically connected its other end ground connection with this first input end I1 of this operational amplifier OP; One termination of the tenth resistor R 10 is received this power signal S2; One end of the 11 resistor R 11 is electrically connected with the output terminal O of this operational amplifier OP, and its other end is electrically connected with the other end of the tenth resistor R 10; The end of this second capacitor C2 is electrically connected with the other end of the 11 resistor R 11, its other end ground connection.
In present embodiment, when this control unit 21 is a processor, has a counting assembly 211 (as shown in Figure 6), at this moment, this input signal S1 is as this count value, and this counting assembly 211 is in order to count the conducting pulse number (as shown in Figure 7) of this input signal S1, and when this input signal S1 was this conducting pulse number, this default value D2 was a pulse number value (shown in Fig. 7 (c)).
To shown in Figure 6, in present embodiment, this switch element 22 is electrically connected with this control unit 21 referring again to Fig. 2, Fig. 4, reception and according to this pilot signal S3, to stop to export this power signal S2; This switch element 22 of present embodiment is also unrestricted, can be a transistor seconds Q2 (as Fig. 4 or shown in Figure 5), the grid of this transistor seconds Q2 receives this pilot signal S3, its source electrode receives this power signal S2, its drain electrode is electrically connected with a drive unit (figure does not show), and also unrestricted in this transistor seconds Q2 enforcement, be example then at this with the PMOS transistor.
The operation of this switch controlling device 2 of present embodiment is as follows: when this control unit 21 is this control circuit (as shown in Figure 4), its this input signal S1 under usual state receives and bias voltage via this first resistor R 1 and this second resistor R 2, after utilizing the 3rd resistor R 3 current limlitings again, deliver to this first transistor Q1, the operation cycle (as 60%) of this input signal S1 is greater than the operation cycle (as 50%) ((a) of Fig. 3 and (c) comparison) of this default value D2 at this moment, then make this first transistor Q1 ON time more than the shut-in time, cause this first capacitor C1 longer via the time of the 5th resistor R 5 and this first transistor Q1 continuous discharge, this pilot signal S3 was a low potential signal and exported this switch element 22 to this moment.If the operation cycle (as 10%) of this input signal S1 is less than the operation cycle (as 50%) ((b) of Fig. 3 and (c) comparison) of this default value D2, then this first transistor Q1 ON time is far fewer than the shut-in time, this power signal S2 then via the 4th resistor R 4 and the 5th resistor R 5 so that this first capacitor C1 duration of charge longer, and this moment, this pilot signal S3 was a high petential signal, and exported this switch element 22 to.
When this control unit 21 is as shown in Figure 5 control circuit, with this power signal S2 via the magnitude of voltage of the pressure drop of the 8th resistor R 8 and the 9th resistor R 9 as this default value D2, and this first input end I1 that delivers to this operational amplifier OP receives, and this input signal S1 is via the pressure drop of the 6th resistor R 6 and the 7th resistor R 7, and send into this second input end I2 of this operational amplifier OP, and relatively by this operational amplifier OP; When normal state, the voltage level of this input signal S1 (pulse width modulating signal) is longer greater than the time of this default value D2, so make that to control this second capacitor C2 via this output terminal O also longer via the time of the 11 resistor R 11 discharges, and this pilot signal S3 is a low potential signal and exports this switch element 22 to.Otherwise, when relatively being that the voltage level of this input signal S1 (pulse width modulating signal) is less than the time of this default value D2 when longer via this operational amplifier OP, it is also longer from the time that the tenth resistor R 10 receives this power signal S2 charging then to control this second capacitor C2 via this output terminal O, and this pilot signal S3 was a high petential signal and exported this switch element 22 to this moment.
Referring again to shown in Figure 6, when this control unit 21 was this processor, the counting assembly 211 of this processor was counted the conducting pulse number of this input signal S1 in the operation cycle.Under normal state, if the conducting pulse number of this input signal S1 is 1200 (Fig. 7 (a)), and the pulse number value of this default value D2 is 1000 (Fig. 7 (c)), so the conducting pulse number of this input signal S1 is greater than the pulse number value of this default value D2, then this control unit 21 this pilot signal of output S3 are a low potential signal, and deliver to this switch element 22.If the conducting pulse number of this input signal S1 is 800 (Fig. 7 (b)), then less than the pulse number of this default value D2, then making this control unit 21 this pilot signal of output S3 is a high petential signal.
Under normal state, this switch element 22 (extremely shown in Figure 6 as Fig. 2, Fig. 4) then is on state in receiving when this pilot signal S3 is the low potential signal, and this power signal S2 is sent via this switch element 22.When this pilot signal S3 is the high petential signal, then makes this switch element 22 not conductings, and stop to export this power signal S2 immediately; Operation cycle until this input signal S1 is grown (as shown in Figure 3) greater than the time of the operation cycle of this default value D2, or the voltage level of this input signal S1 is longer greater than the time of this default value D2, or the conducting pulse number (as shown in Figure 7) of this input signal S1 in the operation cycle is during greater than the pulse number of this default value D2, all can make this pilot signal S3 is that a low potential signal exports this switch element 22 to, so that this switch element 22 is exported this power signal S2 again.
Because this switch controlling device 2 can directly compare this input signal S1 and this default value D2 by this control unit 21, or to compare with this default value D2 again behind counting assembly 211 countings, and when operation cycle of this input signal S1 is longer less than the time of this default value D2, or the voltage level of this input signal S1 is less than the time of this default value D2 when longer, or the conducting pulse number of this input signal S1 is during less than the pulse number value of this default value D2, by above-mentioned manner of comparison, this control unit 21,31 produce and send this pilot signal S3, so that this switch element 22,32 receive and according to this pilot signal S3, stop to export this power signal S2, during this kind mode can be cut off in the power supply of fan system, this switch controlling device 2 can avoid this power signal S2 to be sent in the back segment circuit.
In the various embodiments described above, the manner of comparison of this input signal S1 and this default value D2 is also unrestricted, according to actual demand, can be set in when being greater than or less than, and carries out the operation that stops to send this power signal S2.
Please refer to shown in Figure 8ly, a kind of fan system of preferred embodiment of the present invention 3 receives the input signal S1 and a power signal S2 of an outside, and this fan system 3 comprises a motor 31, a drive unit 32 and a switch controlling device 33.In present embodiment, this drive unit 32 is electrically connected with this motor 31 and this switch controlling device 33 respectively, receive and according to this input signal S1 and this power signal S2 to drive this motor 31.
This switch controlling device 33 has a control unit 331 and a switch element 332, wherein this control unit 331 and this switch element 332 have identical formation, mode of operation and function with this control unit 21 and this switch element 22 (as shown in Figure 2) of above-mentioned preferred embodiment, so repeat no more in this.This control unit 331 of present embodiment can be a control circuit (as Fig. 4 or shown in Figure 5) or a processor (as shown in Figure 6).
The operation of this fan system 3 of present embodiment is as follows: under normal state, this drive unit 32 receives this power signal S2, and drives this motor 31 rotations.For example, when operation cycle of this input signal S1 is longer less than the time of the operation cycle of this default value D2, then this switch controlling device 33 stops to export this power signal S2, makes this drive unit 32 because of not receiving this power signal S2, rotates and stop to drive this motor 31; When this input signal S1 was longer greater than the time of this default value D2, this switch controlling device 33 was exported this power signal S2 again, so that this drive unit 32 is according to this power signal S2, to drive this motor 31 runnings.
What deserves to be mentioned is in addition at this, except above-mentioned by the judgment task cycle, whether voltage level or conducting pulse number are delivered to outside the mode of this drive unit 32 with decision power signal S2, in fact this control unit 331 also can receive an input signal by this drive unit 32, it for example is the pulse duration modulation signal, and this control unit 331 can calculate the turn-on cycle number of this input signal in one period cycle, and do one relatively with the default value (also being the turn-on cycle number) in this processor, when less than this default value, this control unit 331 can make this switch element 332 close, and stops to provide this power signal S2 to this drive unit 32.
In sum, according to a kind of fan system of the present invention and switch controlling device thereof is that this input signal and this default value are directly compared, or compare with the conducting pulse number of counting component count this input signal or turn-on cycle number and with this default value, via aforesaid way, when this input signal during less than this default value, make this switch controlling device judge whether to stop to export this power signal, to stop to drive this motor running to this drive unit.Compare with prior art, fan system of the present invention is by this switch controlling device relatively this input signal and this default value, when cutting off the power supply of this fan system, can stop to provide this power supply to this fan system immediately, to prevent this fan system and peripheral circuit thereof, assembly electric consumption; In addition, the present invention is that the circuit with utmost point low consumpting power is constituted, so can effectively reduce and the current sinking of keyholed back plate integrated circuit the effect that can also reach environmental protection and save electric energy.
The above only is for example, but not is restriction the present invention.Anyly do not break away from spirit of the present invention and category, and, all should be contained in the claim of the present invention its equivalent modifications of carrying out or change.
Claims (14)
1. a fan system receives an input signal and a power signal, comprising:
One motor;
One drive unit is electrically connected with this motor, receives this power signal to drive this motor; And
One switch controlling device, be electrically connected with this drive unit, and comprise a control unit and a switch element, this control unit has a default value, and receives this input signal and this power signal, when this input signal is not equal to this default value, this control unit is exported a pilot signal, this switch element is electrically connected with this control unit, receives and according to this pilot signal, to stop to export this power signal.
2. fan system as claimed in claim 1, wherein this default value is the minimum speed value of this fan.
3. fan system as claimed in claim 1, wherein this input signal is a pulse width modulating signal or a count value, and this power signal is a voltage or an electric current.
4. fan system as claimed in claim 1, wherein this control unit comprises:
One first resistor, its first termination is received this power signal, and its second termination is received this input signal;
One second resistor, its first end is electrically connected with this second end of this first resistor, its second end ground connection;
One the 3rd resistor, its first termination is received this input signal;
One the 4th resistor, its first termination is received this power signal, and is electrically connected with this first end of this first resistor;
One the first transistor, its grid is electrically connected with second end of the 3rd resistor, and its drain electrode is electrically connected its source ground with second end of the 4th resistor;
One the 5th resistor, its first end is electrically connected with this second end and this transistorized this drain electrode of the 4th resistor; And
One first capacitor, its first end is electrically connected with second end of the 5th resistor, its second end ground connection.
5. fan system as claimed in claim 4, wherein this first transistor is a nmos pass transistor.
6. fan system as claimed in claim 1, wherein this control unit comprises:
One the 6th resistor, its first termination is received this power signal, and its second termination is received this input signal;
One the 7th resistor, its first end is electrically connected with this second end of the 6th resistor, its second end ground connection;
One the 8th resistor, its first termination is received this power signal;
One operational amplifier, the one first input end is electrically connected with second end of the 8th resistor, and one second input end receives this input signal;
One the 9th resistor, its first end is electrically connected with this first input end of this operational amplifier, its second end ground connection;
The tenth resistor, its first termination is received this power signal;
The 11 resistor, its first end is electrically connected with an output terminal of this operational amplifier, and its second end is electrically connected with second end of the tenth resistor; And
One capacitor, the one end is electrically connected with second end of the 11 resistor, its other end ground connection.
7. fan system as claimed in claim 1, wherein this control unit is a processor.
8. fan system as claimed in claim 7, wherein this processor has a counting assembly, in order to turn-on cycle number or the conducting pulse number of counting this input signal.
9. fan system as claimed in claim 8, wherein when the turn-on cycle number of this input signal of counting, this default value be a pulse interval numerical value maybe when counting the conducting pulse number of this input signal, this default value is a pulse number value.
10. fan system as claimed in claim 1, wherein this switch element comprises a transistor seconds, and its grid receives this pilot signal, and its source electrode receives this power signal, and its drain electrode is electrically connected with this drive unit.
11. fan system as claimed in claim 10, wherein this transistor seconds is a PMOS transistor.
12. fan system as claimed in claim 1, wherein this pilot signal is a high petential signal or a low potential signal.
13. fan system as claimed in claim 1, wherein this input signal is by this drive unit output.
14. a switch controlling device receives an input signal and a power signal, comprising:
One control unit has a default value, and receives this input signal and this power signal, and when this input signal was not equal to this default value, this control unit was exported a pilot signal; And
One switch element is electrically connected with this control unit, receives and according to this pilot signal, to stop to export this power signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101054235A CN101101001B (en) | 2006-07-06 | 2006-07-06 | Fan system and its switch control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101054235A CN101101001B (en) | 2006-07-06 | 2006-07-06 | Fan system and its switch control device |
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| Publication Number | Publication Date |
|---|---|
| CN101101001A CN101101001A (en) | 2008-01-09 |
| CN101101001B true CN101101001B (en) | 2010-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2006101054235A Active CN101101001B (en) | 2006-07-06 | 2006-07-06 | Fan system and its switch control device |
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| CN (1) | CN101101001B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1423410A (en) * | 2001-12-03 | 2003-06-11 | 台达电子工业股份有限公司 | Fan control system using single crystal chip |
| CN1721704A (en) * | 2004-07-12 | 2006-01-18 | 台达电子工业股份有限公司 | Fan control system using a microcontroller |
-
2006
- 2006-07-06 CN CN2006101054235A patent/CN101101001B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1423410A (en) * | 2001-12-03 | 2003-06-11 | 台达电子工业股份有限公司 | Fan control system using single crystal chip |
| CN1721704A (en) * | 2004-07-12 | 2006-01-18 | 台达电子工业股份有限公司 | Fan control system using a microcontroller |
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| Publication number | Publication date |
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| CN101101001A (en) | 2008-01-09 |
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