CN101055295B - Fan system and its power source monitoring device - Google Patents
Fan system and its power source monitoring device Download PDFInfo
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- CN101055295B CN101055295B CN2006100741004A CN200610074100A CN101055295B CN 101055295 B CN101055295 B CN 101055295B CN 2006100741004 A CN2006100741004 A CN 2006100741004A CN 200610074100 A CN200610074100 A CN 200610074100A CN 101055295 B CN101055295 B CN 101055295B
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Abstract
A power monitoring apparatus for receiving an external input signal comprises a first modulation unit for receiving and modulating for producing a first signal based on the input signal, a second modulation unit for receiving and modulating for producing a second signal based on the input signal and a comparison unit connected with the first modulation unit and the second modulation unit and provided with a first input terminal, a second input terminal and an output terminal. The first input terminal receives the first signal, and the second input terminal receives the second signal, the output terminal outputs a control signal when the difference of the first signal and the second signal is higher or lower than a predetermined range.
Description
Technical field
The present invention relates to a kind of fan system and power source monitoring device thereof, particularly a kind ofly avoid voltage or electric current instantaneous variation, and influence the fan system and the power source monitoring device thereof of fan component.
Background technology
The functional requirement of electronic equipment is more and more higher, and various auxiliary devices are also many all the more more, so when the circuit that uses is complicated more, for avoiding line short very worthy electronic equipment is caused damage, electric power controller becomes indispensable one of electronic equipment; And fan, blower module or motor applications are no exception in this.
When fan or motor operation, if power supply changed in moment, then the circuit of fan or motor is subjected to the impact of immediate current or voltage, blocks (shout down) phenomenon and curtage takes place, and causes the circuit of fan itself or motor to damage; Again because of fan shuts down, but electronic equipment continues running, and causes superheating phenomenon.For addressing the above problem, fan all adopts overvolatge device or excess current monitoring arrangement usually, is not subjected to moment excess current or the influence of transient overvoltage with protection electronic equipment or fan.
Please refer to shown in Figure 1ly, a kind of existing overvolatge device 1 is to electrically connect with the motor M of a fan, and comprises that two resistor R, R ' and a processor 11, this processor 11 are and these resistor R, R ' electrically connect, and set a predeterminated voltage.The action of this overvolatge device 1 is as follows: by these resistor R, R ' with one from the outside voltage signal V that receives
InDividing potential drop is to produce a voltage division signal V
s, and deliver to this processor 11; This processor 11 is this voltage division signal V relatively
sAnd this predeterminated voltage, as this voltage division signal V
sDuring greater than this predeterminated voltage, then this processor 11 is sent a control signal S
cTo this motor M, to reduce the rotating speed of this motor M.
Please refer to shown in Figure 2ly, a kind of existing overcurrent device 2 is to electrically connect with the motor M of a fan, and comprises a sense resistor R
sAnd a controller 21, this controller 21 is and this sense resistor R
sElectrically connect, and set a predetermined current.The action of this overcurrent device 2 is as follows: by this sense resistor R
sThe sensing one outside voltage signal V that receives
In, to produce a current signal I
s, deliver to this controller 21; This controller 21 is this current signal I relatively
sAnd this predetermined current, as this current signal I
sDuring greater than this predetermined current, this controller 21 is to send a control signal S
cTo this motor M, to reduce the rotating speed of this motor M.
Yet, when this fan uses this overvolatge device 1, only can detect the superpotential situation, and can't detect the variation of transient voltage in real time, so can't effectively protect fan; And when using this overcurrent device 2, then slow because of the reaction velocity that detects, so can't suppress the inrush current that produces because of the voltage change moment, fragile fan component.No matter so use this overvolatge device 1 or this overcurrent device 2 all because of can't detecting the situation of curtage moment change in real time, and can't effectively protect fan, more reduce the serviceable life of fan.
How the whence provides a kind of fan system and power source monitoring device thereof that can detect voltage or electric current instantaneous variation in real time because of in this, with the protection fan component, so that the serviceable life of lifting fan system, one of current just important topic.
Summary of the invention
Because above-mentioned problem, purpose of the present invention is for providing a kind of fan system and power source monitoring device thereof that can detect voltage or electric current instantaneous variation in real time, with the protection fan component, and then promotes serviceable life of fan system.
Edge is, for reaching above-mentioned purpose, according to a kind of power source monitoring device of the present invention, is connected with a motor, and receives the input signal of an outside, and this power source monitoring device comprises one first modulating unit, one second modulating unit and a comparing unit.This first modulating unit is to receive and according to this input signal, produce one first signal with modulation; This second modulating unit is to receive and according to this input signal, produce a secondary signal with modulation; This comparing unit is to electrically connect with this first modulating unit and this second modulating unit, and has a first input end, one second input end and an output terminal.This first input end receives this first signal, this second input end receives this secondary signal, when the difference of this first signal and this secondary signal was higher or lower than a preset range in this comparing unit, this output terminal was exported a control signal, to reduce the rotating speed of this motor.
For reaching above-mentioned purpose, be the input signal that receives an outside according to a kind of fan system of the present invention, this fan system comprises a motor, a power source monitoring device and a drive unit.This motor is to receive this input signal; This power source monitoring device is to comprise one first modulating unit, one second modulating unit and a comparing unit.This first modulating unit receives and according to this input signal, produce one first signal with modulation, this second modulating unit receives and according to this input signal, produce a secondary signal with modulation, this comparing unit and this first modulating unit and this second modulating unit electrically connect, and have a first input end, one second input end and an output terminal.This first input end receives this first signal, and this second input end receives this secondary signal, and when the difference of this first signal and this secondary signal was higher or lower than a preset range in this comparing unit, this output terminal was exported a control signal; This drive unit is and this motor and this power source monitoring device electrically connect, and receives and according to this control signal, to reduce the rotating speed of this motor.
From the above, fan system of the present invention and power source monitoring device thereof are to monitor this input signal by this power source monitoring device, and utilize this first modulating unit, this second modulating unit and this comparing unit to match, difference and this preset range of this first signal and this secondary signal are compared mutually, produce this and control signal to this drive unit, and then control the rotating speed of this motor.Compare with prior art; the present invention can this input signal of real time monitoring; when voltage or electric current instantaneous variation take place; send this control signal immediately; to reduce the rotating speed of this motor, protect fan component, and reply just often at this input signal; the rotating speed of replying this motor makes this fan system normal operation, promotes the serviceable life of fan system.In addition, power source monitoring device of the present invention can significantly reduce cost owing to the situation that can detect voltage or electric current instantaneous variation simple in structure.
Description of drawings
Fig. 1 is a kind of synoptic diagram of existing overvolatge device;
Fig. 2 is a kind of synoptic diagram of existing overcurrent device;
Fig. 3 and Fig. 4 are the synoptic diagram according to a kind of power source monitoring device of preferred embodiment of the present invention; And
Fig. 5 and Fig. 6 are the synoptic diagram according to a kind of fan system of preferred embodiment of the present invention.
The reference numeral explanation:
The 1-overvolatge device; The 11-processor
The 2-overcurrent device; The 21-controller
The 3-power source monitoring device; 31-first modulating unit
31 '-modulation circuit; 32-second modulating unit
The 33-comparing unit; The 4-fan system
The 41-drive unit;
The C-capacitor; I
s-current signal
The M-motor; The O-output terminal
The P first input end; P
2-the second input end
R, R-resistor; R
s-sense resistor
R
1-the first resistor; R
2-the second resistor
R
3-Di three resistors; R
4-Di four resistors
S
1-the first signal; S
2-secondary signal
S
3, S
cControl signal; S
In-input signal
V
InVoltage signal; V
sVoltage division signal
Embodiment
Hereinafter with reference to correlative type, a kind of fan system and power source monitoring device thereof according to preferred embodiment of the present invention are described, wherein, identical assembly will be illustrated with identical reference marks.
Please refer to shown in Figure 3ly, a kind of power source monitoring device 3 of preferred embodiment of the present invention is the input signal S that receives an outside
In, this power source monitoring device 3 comprises one first modulating unit 31, one second modulating unit 32 and a comparing unit 33.This power source monitoring device 3 is to can be applicable to a fan system.
In the present embodiment, this first modulating unit 31 is to receive and according to this input signal S
In, produce one first signal S with modulation
1, and this second modulating unit 32 is to receive and according to this input signal S
In, produce a secondary signal S with modulation
2This of present embodiment first signal S
1And this secondary signal S
2And unrestricted, decide into voltage or electric current on these power source monitoring device 3 supervision, so when this power source monitoring device 3 is monitor voltage, this first signal S then
1And this secondary signal S
2It is a voltage signal; When this power source monitoring device 3 is standby current, this first signal S then
1And this secondary signal S
2It is a current signal.
Referring again to shown in Figure 3, this comparing unit 33 is to electrically connect with this first modulating unit 31 and this second modulating unit 32, and has a first input end P
1, one second input end P
2And an output terminal O, this first input end P
1Receive this first signal S
1, this second input end P
2Receive this secondary signal S
2, as this first signal S
1And this secondary signal S
2Difference when being higher or lower than a preset range, this output terminal O exports a control signal S
3This comparing unit 33 of present embodiment can be a comparer, and this comparing unit 33 and unrestricted also can be reached by a processor or an operational amplifier (operational amplifier), with next be that example is illustrated with this operational amplifier.
Please refer to shown in Figure 4ly, the formation of first modulating unit 31 of this in the present embodiment and this second modulating unit 32 is also unrestricted, at this, then be made of a modulation circuit 31 ', and this modulation circuit 31 ' is and this comparing unit 33 electrically connects.
This modulation circuit 31 ' comprises one first resistor R
1, one second resistor R
2, one the 3rd resistor R
3, one the 4th resistor R
4An and capacitor C
1Wherein, this first resistor R
1First end be to receive this input signal S
In, this second resistor R
2First end be and this first resistor R
1Second end and this first input end P
1Electrically connect; And the 3rd resistor R
3First end be to receive this input signal S
In, and with this first resistor R
1First end electrically connect the 4th resistor R
4First end be and the 3rd resistor R
3Second end and this second input end P
2Electrically connect the 4th resistor R
4Second end be and this second resistor R
2Second end electrically connect; This capacitor C
1First end be and this second input end P
2And the 4th resistor R
4This first end electrically connect this capacitor C
1Second end be and the 4th resistor R
4This second end electrically connect.
The action of this power source monitoring device 3 is as follows: this modulation circuit 31 ' is from outside this input signal S that receives
In, and by this first resistor R
1And this second resistor R
2With this input signal S
InModulate, and produce this first signal S
1, and deliver to this first input end P in real time
1Simultaneously by the 3rd resistor R
3And the 4th resistor R
4With this input signal S
InModulate, and to this capacitor C
1Charge, to produce this secondary signal S
2Deliver to this second input end P in real time
2And this comparing unit 33 is to make this first signal S
1And this secondary signal S
2Difference and this preset range in this comparing unit 33 compare mutually, and according to comparative result, as this first signal S
1And this secondary signal S
2Difference when being higher or lower than this preset range, produce a control signal S at this output terminal O
3The present invention is this input signal of real time monitoring S
In, as input signal S
InIn when, in moment voltage or electric current variation taking place, this first signal S
1Also can instantaneous variation; Yet, because this capacitor C
1The charging effect, make secondary signal S
2Be changed to gradual but not instantaneous variation, so this first signal S
1With this secondary signal S
2Difference can exceed preset range, and make this comparing unit 33 can send this control signal S immediately
3, to reduce the rotating speed of this motor M, protect fan component, and at this input signal S
InReply just often this control signal S
3Reply the rotating speed of this motor M.
Please refer to shown in Figure 5ly, a kind of fan system 4 of preferred embodiment of the present invention is the input signal S that receives an outside
In, this fan system 4 comprises a motor M, a power source monitoring device 3 and a drive unit 41.
In the present embodiment, this motor M receives this input signal S
InAnd this drive unit 41 is to electrically connect with this motor M and this power source monitoring device 3.This drive unit 41 of present embodiment has one drive circuit (figure does not show), and the formation of this driving circuit and unrestricted also can be incorporated in the processor with this comparing unit 33.
The action of this fan system 4 is as follows: this power source monitoring device 3 and this motor M receive this input signal S simultaneously
In, and this input signal S that will receive by this power source monitoring device 3
InModulate, so that this comparing unit 33 produces a control signal S
3, and deliver to this drive unit 41, to control the rotating speed of this motor M.
Please refer to shown in Figure 6ly, present embodiment is that this modulation circuit 31 ' is applied to this fan system 4.Because the formation and the function of this power source monitoring device 3 and this modulation circuit 31 ' have been described in detail in the foregoing description, so do not repeat them here.
Because this fan system 4 can be by this power source monitoring device 3, at this input signal S
InWhen instantaneous variation is arranged, can monitor and send this control signal S immediately
3, so that this drive unit 41 can be according to this control signal S
3And reduce the rotating speed of this motor M, to protect this fan system 4.And at this input signal S
InReply just often this control signal S
3Reply the rotating speed of this motor M.
In sum, fan system of the present invention and power source monitoring device thereof are to monitor this input signal by this power source monitoring device, and utilize this first modulating unit, this second modulating unit and this comparing unit to match, difference and this preset range of this first signal and this secondary signal are compared mutually, produce this and control signal to this drive unit, and then control the rotating speed of this motor.Compare with prior art; this input signal of real time monitoring of the present invention; in when, in moment voltage or electric current variation taking place; can send this control signal immediately; to reduce the rotating speed of this motor, protect fan component, and reply just often at this input signal; the rotating speed of replying this motor makes this fan system normal operation, promotes the serviceable life of fan system.In addition, this power source monitoring device of the present invention more can significantly reduce cost owing to the changing condition that can detect voltage or electric current simple in structure.
The above only is an illustrative, but not is restricted person.Anyly do not break away from spirit of the present invention and category, and, all should be included in the accompanying claim its equivalent modifications of carrying out or change.
Claims (12)
1. a power source monitoring device is connected with a motor, and receives the input signal of an outside, and this power source monitoring device comprises:
One first modulating unit is to receive and according to this input signal, produce one first signal with modulation;
One second modulating unit is to receive and according to this input signal, produce a secondary signal with modulation; And
One comparing unit, be to electrically connect with this first modulating unit and this second modulating unit, and have a first input end, one second input end and an output terminal, this first input end receives this first signal, this second input end receives this secondary signal, when the difference of this first signal and this secondary signal was higher or lower than a preset range in this comparing unit, this output terminal was exported a control signal, to reduce the rotating speed of this motor.
2. power source monitoring device as claimed in claim 1, wherein, this first signal and this secondary signal are a current signal or a voltage signal.
3. power source monitoring device as claimed in claim 1, wherein, this comparing unit is a processor or an operational amplifier.
4. power source monitoring device as claimed in claim 1, wherein, this first modulating unit and this second modulating unit are to be made of a modulation circuit, this modulation circuit is to electrically connect with this comparing unit.
5. power source monitoring device as claimed in claim 4, wherein, this modulation circuit comprises:
One first resistor, its first end are to receive this input signal;
One second resistor, its first end are to electrically connect with second end of this first resistor and this first input end;
One the 3rd resistor, its first end are to receive this input signal, and electrically connect with this first end of this first resistor;
One the 4th resistor, its first end are to electrically connect with second end of the 3rd resistor and this second input end, and its second end is that second end with this second resistor electrically connects; And
One capacitor, its first end are that this first end with this second input end and the 4th resistor electrically connects, and its second end is that this second end with the 4th resistor electrically connects.
6. a fan system is the input signal that receives an outside, and this fan system comprises:
One motor is to receive this input signal;
One power source monitoring device, be to comprise one first modulating unit, one second modulating unit and a comparing unit, this first modulating unit receives and according to this input signal, produce one first signal with modulation, this second modulating unit receives and according to this input signal, produce a secondary signal with modulation, this comparing unit is to electrically connect with this first modulating unit and this second modulating unit, and has a first input end, one second input end and an output terminal, this first input end receives this first signal, this second input end receives this secondary signal, when the difference of this first signal and this secondary signal was higher or lower than a preset range in this comparing unit, this output terminal was exported a control signal; And
One drive unit is and this motor and this power source monitoring device electrically connect to receive and according to this control signal, to reduce the rotating speed of this motor.
7. fan system as claimed in claim 6, wherein, this first signal and this secondary signal are a current signal or a voltage signal.
8. fan system as claimed in claim 6, wherein, this comparing unit is a processor or an operational amplifier.
9. fan system as claimed in claim 6, wherein, this first modulating unit and this second modulating unit are to be made of a modulation circuit, this modulation circuit and this comparing unit electrically connect.
10. fan system as claimed in claim 9, wherein, this modulation circuit comprises:
One first resistor, its first end are to receive this input signal;
One second resistor, its first end are to electrically connect with second end of this first resistor and this first input end;
One the 3rd resistor, its first end are to receive this input signal, and electrically connect with this first end of this first resistor;
One the 4th resistor, its first end are to electrically connect with second end of the 3rd resistor and this second input end, and its second end is that second end with this second resistor electrically connects; And
One capacitor, its first end are that this first end with this second input end and the 4th resistor electrically connects, and its second end is that this second end with the 4th resistor electrically connects.
11. fan system as claimed in claim 6, wherein, this drive unit has one drive circuit.
12. fan system as claimed in claim 11, wherein, this driving circuit and this comparing unit are to be incorporated in the processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100741004A CN101055295B (en) | 2006-04-12 | 2006-04-12 | Fan system and its power source monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100741004A CN101055295B (en) | 2006-04-12 | 2006-04-12 | Fan system and its power source monitoring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101055295A CN101055295A (en) | 2007-10-17 |
| CN101055295B true CN101055295B (en) | 2010-04-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100741004A Active CN101055295B (en) | 2006-04-12 | 2006-04-12 | Fan system and its power source monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101055295B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102454618A (en) * | 2010-10-19 | 2012-05-16 | 鸿富锦精密工业（深圳）有限公司 | Fan control system and method |
Citations (6)
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|---|---|---|---|---|
| CN1451973A (en) * | 2002-04-17 | 2003-10-29 | 神基科技股份有限公司 | Cell low potential warning device |
| CN2676477Y (en) * | 2003-11-10 | 2005-02-02 | 奇鋐科技股份有限公司 | Motor protector |
| US6853523B1 (en) * | 1998-11-12 | 2005-02-08 | Empresa Brasileira De Compressores S.A. -Embraco | System and a method for protecting an electric motor and its control circuit, and an electric motor |
| CN1661379A (en) * | 2004-02-26 | 2005-08-31 | 三美电机株式会社 | Current detection circuit and protection circuit |
| CN1680727A (en) * | 2004-04-05 | 2005-10-12 | 奇鋐科技股份有限公司 | Controlling circuit of low-voltage high rotating speed rotation with high-voltage activation for DC fan motor |
| CN1755376A (en) * | 2004-09-30 | 2006-04-05 | 日产自动车株式会社 | Overcurrent detection method and testing circuit |
-
2006
- 2006-04-12 CN CN2006100741004A patent/CN101055295B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6853523B1 (en) * | 1998-11-12 | 2005-02-08 | Empresa Brasileira De Compressores S.A. -Embraco | System and a method for protecting an electric motor and its control circuit, and an electric motor |
| CN1451973A (en) * | 2002-04-17 | 2003-10-29 | 神基科技股份有限公司 | Cell low potential warning device |
| CN2676477Y (en) * | 2003-11-10 | 2005-02-02 | 奇鋐科技股份有限公司 | Motor protector |
| CN1661379A (en) * | 2004-02-26 | 2005-08-31 | 三美电机株式会社 | Current detection circuit and protection circuit |
| CN1680727A (en) * | 2004-04-05 | 2005-10-12 | 奇鋐科技股份有限公司 | Controlling circuit of low-voltage high rotating speed rotation with high-voltage activation for DC fan motor |
| CN1755376A (en) * | 2004-09-30 | 2006-04-05 | 日产自动车株式会社 | Overcurrent detection method and testing circuit |
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| Publication number | Publication date |
|---|---|
| CN101055295A (en) | 2007-10-17 |
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