CN100461577C - Fan system and protection method therefor - Google Patents
Fan system and protection method therefor Download PDFInfo
- Publication number
- CN100461577C CN100461577C CNB2005101243779A CN200510124377A CN100461577C CN 100461577 C CN100461577 C CN 100461577C CN B2005101243779 A CNB2005101243779 A CN B2005101243779A CN 200510124377 A CN200510124377 A CN 200510124377A CN 100461577 C CN100461577 C CN 100461577C
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- CN
- China
- Prior art keywords
- fan
- circuit
- switch module
- fan system
- power supply
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Cooling Or The Like Of Electrical Apparatus (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
The invention supplies a fan system. It includes one drive circuit, one protective circuit, at least one protective assembly, and at least fan. The drive circuit is electrical connection with the fan, received the power to make the fan rotate. The protective assembly is electrical property series connection with the fan of which one end is connected with the drive circuit together. The protective circuit is connected between the protective assembly and the drive circuit of which output current is bigger than cut-off current of the protective assembly while one of the fans is short circuit. Thereby the protective assembly will be disabled to make the fan cannot gain the power and stop rotating.
Description
Technical field
The present invention is about a kind of fan system and guard method thereof.
Background technology
See also Fig. 1, disclosed a kind of existing fan system 1, it mainly is by one drive circuit 10, a capacitor C
1, at least one protection assembly 20 and at least one fan 30 form; Wherein this drive circuit 10 is electrically connected at a power supply unit 2, and its by a switch module 11 and a driven unit 12 form this capacitor C
1An end be electrically connected at this drive circuit 10, and its other end is electrically connected at earth terminal, those protection assemblies 20 electrically are connected in series accordingly with those fans 30, and those protection assemblies 20 wherein an end be electrically connected to this capacitor C jointly
1
This switch module 11 is electrically connected at this power supply unit 2 and this capacitor C in this drive circuit 10
1Between, this driven unit 12 then is electrically connected between this power supply unit 2 and this switch module 11, the unlatching of this this switch module 11 of driven unit 12 may command or close, when this switch module 11 was opened, the power supply that this power supply unit 2 is produced can input to this capacitor C
1Store charge, and after storage is finished, provide voltage and electric current to input to those protection assembly 20 and those fans 30, and the situation that is short-circuited as arbitrary fan 30 (for example the inner wire rod excoriation of fan and touch ironware in the system), if those protection assemblies 20 (being embodied as a fuse usually) can blow immediately and do an isolation with short circuit event, when reaching protection this drive circuit 10 of prime and back grade those fans 30; Only in fact; because those protection assemblies 20 are the protection assembly for passive-type; if short circuit condition fails those protection assemblies 20 are blown; this moment is because a set current sensing means (not shown) can continue to detect this short circuit event in this driven unit 12; this drive circuit 10 will be worked as machine because this short circuit event can't remove; and simultaneously this switch module 11 is closed; cause back all fans 30 of level to shut down; the load meeting that this moment, this fan system 1 was responsible for dispelling the heat can't operate because of the deficiency of dispelling the heat, and all stops when machine or reaches the result of overheated damage to system eventually.
Summary of the invention
Because above-mentioned problem; purpose of the present invention is for providing a kind of fan system and guard method thereof that includes active defencive function; it can be when short circuit condition takes place, and forces those protection assemblies to blow or loses efficacy, and have the situation generation of the disconnected and mistake reaction of erroneous judgement.
Therefore for reaching above-mentioned purpose, the present invention discloses a kind of fan system, and this fan system is electrically connected at a power supply unit, and receives the power supply that this power supply unit produces.This fan system mainly is by at least one drive circuit; one protective circuit; at least one protection assembly and at least one fan are formed; wherein this drive circuit is electrically connected at those fans; and this drive circuit can receive this power supply to drive those fan runnings; those protection assemblies electrically are connected in series in those fans accordingly; and the one end jointly is connected in this drive circuit; this protective circuit is electrically connected between those protection assemblies and this drive circuit; and its output current value in those fans wherein one when being short-circuited situation greater than a cut-off current to this protection assembly that should fan; by this; this protection assembly will lose efficacy making this fan can't obtain power supply again, and stop operating.
For reaching above-mentioned purpose, the present invention more provides a kind of guard method of fan system, this fan system mainly is by one drive circuit, one protective circuit, at least one protection assembly and at least one fan are formed, this drive circuit can drive this fan running, this protective circuit is electrically connected between this drive circuit and those fans, those protection assemblies electrically are connected in series in those fans accordingly, and the one end jointly is electrically connected at this protective circuit, and this guard method is selected this output current value of this protective circuit according to a cut-off current of those protection assemblies, and this output current value in those fans wherein one when being short-circuited situation greater than this cut-off current to this protection assembly that should fan; The mat said method, when this fan produced short circuit condition, this protected component failures, and this fan is shut down.
For allowing above and other objects of the present invention, feature and the advantage can be brighter
For making the present invention clearer, a preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below.
Description of drawings
Fig. 1 is the composition schematic diagram of existing fan system.
Fig. 2 is the composition schematic diagram of fan system of the present invention.
Fig. 3 is that this protective circuit is implemented schematic diagram in Fig. 2 fan system.
Fig. 4 is the enforcement circuit diagram () of this drive circuit in Fig. 2 fan system.
Fig. 5 is the enforcement circuit diagram (two) of this drive circuit in Fig. 2 fan system.
[primary clustering symbol description]
1 fan system, 2 power supply units
10 drive circuits, 11 switch modules
12 driven units, 20 protection assemblies
30 fan C
1Capacitor
3 fan systems
40 drive circuits, 41 switch modules
42 driven units, 50 protective circuits
60 protection assemblies, 70 fans
Q
1～Q
3Transistor R
1～R
5Resistor
D
1～D
4Diode C
1～C
3Capacitor
The IC integrated circuit (IC) chip
Embodiment
Consult Fig. 2, disclose the composition schematic diagram of fan system of the present invention.Wherein this fan system 3 mainly is made up of one drive circuit 40, a protective circuit 50, at least one protection assembly 60 and at least one fan 70; One end of this drive circuit 40 is electrically connected at a power supply unit 2; and it is made up of a switch module 41 and a driven unit 42; this protective circuit 50 is electrically connected between the other end and those protection assemblies 60 of this drive circuit 40; those protection assemblies 60 electrically are connected in series accordingly with those fans 70; and those protection assemblies 60 a wherein end are electrically connected to this protective circuit 50 jointly, use to make each protection assembly 60 fan 70 corresponding with it form an individual path independently.
This switch module 41 is electrically connected between this power supply unit 2 and this protective circuit 50 in this drive circuit 40; this driven unit 42 then is electrically connected between this power supply unit 2 and this switch module 41; the unlatching of this this switch module 41 of driven unit 42 may command or close; when this switch module 41 is opened; the power supply that this power supply unit 2 is produced can input to this protective circuit 50; this protective circuit 50 mainly has the function of storage power; and produce under the short circuit condition in arbitrary individual path; this protective circuit 50 exportable one is greater than the function of those protection assembly 60 cut-off currents (promptly can bear lowest high-current value); under normal conditions; 50 of this protective circuits are in order to the electric charge of this power supply that can store this power supply unit 2 and produced; export this electric current and voltage when complete again to those protection assembly 60 and those fans 70 and wait to store, to make those fans 70 runnings.
Please consult shown in Figure 3ly again, in present embodiment, this protective circuit 50 is by several capacitors C
2Be formed in parallel; and therefore forming one has the protective circuit 50 of big capacitance; thus; when arbitrary individual path produces short circuit condition; because the impedance minimum of short circuit paths, so the electric current that this protective circuit 50 is exported almost all flows to this short circuit paths, and because the characteristic of the big electric current that big capacitance is produced; event can force this protection assembly 60 to blow or lose efficacy, and makes the fan 70 of this individual path shut down.
It should be noted that; opening circuit of this short circuit paths; do not cause other individual path to be affected; therefore the output current of this protective circuit 50 can continue to distribute to other individual path to make those fan 70 runnings; unlikely so the disappearance of the radiating effect of this fan system 3; one unlikely this drive circuit 40 that makes is worked as machine because of the unusual of electric current, and two more effectively keep the running smoothness of these fan system 3 integral body.
In addition, the present invention is by the characteristic that makes this short circuit paths open circuit immediately, on reaction speed faster than detection reaction time of a current sensing means (not shown) set in this driven unit 42, can not close even can guarantee this driven unit 42 thus, and make back those fans 70 of level that the effect of heat radiation can't be provided again because of this switch module 41 of arbitrary individual path short circuit.
Please consult shown in Figure 4ly again, this drive circuit 40 can add the hardware framework to constitute by software in this fan system 3 of the present invention.Wherein this switch module 41 is a transistor Q
1, particularly be embodied as a N-channel MOS FET; And this driven unit 42 mainly includes an integrated circuit die I C, and this integrated circuit die I C can receive this power supply that this power supply unit 2 is produced, use control this switch module 41 unlatching or close.
Please consult shown in Figure 5ly again, this drive circuit 40 can be embodied as a soft active circuit in this fan system 3 of the present invention.Wherein this switch module 41 is a transistor Q
2, be embodied as a P channel mosfet at this; This driven unit 42 then mainly is by resistor R
1～R
5, diode D
1～D
4, transistor Q
3, capacitor C
3Constitute etc. main passive component, this driven unit 42 receives this power supply that these power supply units 2 are produced and makes this transistor Q
3During unlatching, i.e. this transistor of may command Q
2Open.
In sum; because of complying with a kind of fan system of the present invention and guard method thereof; this fan system can produce under the short circuit condition in arbitrary individual path; by this protective circuit to force this protection assembly and blow or to lose efficacy; and the guard method of this fan system; comprised the protective circuit of selecting exportable electric current greater than this protection assembly cut-off current for use; so can be when arbitrary individual path short circuit; should protect assembly to blow immediately or lost efficacy; and the unlikely normal operation that influences other individual path of the individual path that makes this generation short circuit condition, and further guarantee the heat radiation function of this fan system.
The above only is exemplary, but not is restrictive.Anyly do not break away from spirit of the present invention and category, and, all should be contained in the appending claims its equivalent modifications of carrying out or change.
Claims (18)
1. fan system, it is electrically connected at a power supply unit, and receives the power supply that this power supply unit produces, and this fan system includes:
At least one fan;
One drive circuit, it is electrically connected at those fans, and receives this power supply to drive those fan runnings; It is characterized in that:
At least one protection assembly, it electrically is connected in series in those fans accordingly, and an end of those protection assemblies jointly is electrically connected at this drive circuit; And
One protective circuit, it is electrically connected between those protection assemblies and this drive circuits, and the output current value of this protective circuit when one of them is short-circuited situation in those fans is greater than the cut-off current to this protection assembly that should fan.
2. fan system as claimed in claim 1, wherein this protection assembly is a fuse.
3. fan system as claimed in claim 1, wherein this protective circuit is composed in parallel by a capacitor or several capacitors.
4. fan system as claimed in claim 1; wherein this drive circuit is made up of a switch module and a driven unit; this switch module is electrically connected between this power supply unit and this protective circuit; and this driven unit is electrically connected between this power supply unit and this switch module; this driven unit can be opened this switch module, and sends this power supply to this protective circuit.
5. fan system as claimed in claim 4, wherein this switch module is a transistor.
6. fan system as claimed in claim 4, wherein this switch module is a P channel mosfet or is a N-channel MOS FET.
7. fan system as claimed in claim 4, wherein this driven unit includes an integrated circuit.
8. fan system as claimed in claim 4, wherein this drive circuit is a soft active circuit.
9. fan system as claimed in claim 8, wherein this driven unit is made up of a transistor, a capacitor, several resistors and several diodes.
10. the guard method of a fan system; this fan system is made up of one drive circuit, a protective circuit, at least one protection assembly and at least one fan; this drive circuit can drive this fan running; this protective circuit is electrically connected between this drive circuit and those fans; those protection assemblies electrically are connected in series in those fans accordingly; and the one end jointly is electrically connected at this protective circuit, and this guard method includes:
Cut-off current according to those protection assemblies is selected an output current value of this protective circuit, and this output current value when one of them is short-circuited situation in those fans greater than this cut-off current to this protection assembly that should fan;
The mat said method, when this fan produced short circuit condition, this protected component failures, and this fan is shut down.
11. guard method as claimed in claim 10, wherein this protection assembly is a fuse.
12. guard method as claimed in claim 10, wherein this protective circuit is that a capacitor or several capacitors compose in parallel.
13. guard method as claimed in claim 10; wherein this drive circuit is made up of a switch module and a driven unit; this switch module is electrically connected between this power supply unit and this protective circuit; and this driven unit is electrically connected between this power supply unit and this switch module; this driven unit can be opened this switch module, and sends this power supply to this protective circuit.
14. guard method as claimed in claim 13, wherein this switch module is a transistor.
15. guard method as claimed in claim 13, wherein this switch module is a P channel mosfet or is a N-channel MOS FET.
16. guard method as claimed in claim 13, wherein this driven unit includes an integrated circuit.
17. guard method as claimed in claim 13, wherein this drive circuit is a soft active circuit.
18. guard method as claimed in claim 17, wherein this driven unit is made up of a transistor, a capacitor, several resistors and several diodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101243779A CN100461577C (en) | 2005-11-29 | 2005-11-29 | Fan system and protection method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101243779A CN100461577C (en) | 2005-11-29 | 2005-11-29 | Fan system and protection method therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1978914A CN1978914A (en) | 2007-06-13 |
| CN100461577C true CN100461577C (en) | 2009-02-11 |
Family
ID=38130185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101243779A Expired - Fee Related CN100461577C (en) | 2005-11-29 | 2005-11-29 | Fan system and protection method therefor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100461577C (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86103005A (en) * | 1986-05-02 | 1987-02-25 | 韩柏青 | A kind of by capacitor energy storage direct current power source supplying power device |
| US4926280A (en) * | 1989-11-06 | 1990-05-15 | Ncr Corporation | Capacitor protection circuit for protecting storage capacitors in an electronic power supply |
| JPH05244732A (en) * | 1990-11-30 | 1993-09-21 | Naldec Kk | Device for protecting electronic device for vehicle having solar cell |
| CN2387293Y (en) * | 1998-11-26 | 2000-07-12 | 广东省经济特区实业有限公司 | Fan speed regulator with protective function |
| US6747432B2 (en) * | 2002-01-31 | 2004-06-08 | Denso Corporation | Drive apparatus for cooling fan motor for use in vehicle |
| CN1592020A (en) * | 2003-09-03 | 2005-03-09 | 建准电机工业股份有限公司 | Over voltage protecting circuit for dc brushless fan motor |
-
2005
- 2005-11-29 CN CNB2005101243779A patent/CN100461577C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86103005A (en) * | 1986-05-02 | 1987-02-25 | 韩柏青 | A kind of by capacitor energy storage direct current power source supplying power device |
| US4926280A (en) * | 1989-11-06 | 1990-05-15 | Ncr Corporation | Capacitor protection circuit for protecting storage capacitors in an electronic power supply |
| JPH05244732A (en) * | 1990-11-30 | 1993-09-21 | Naldec Kk | Device for protecting electronic device for vehicle having solar cell |
| CN2387293Y (en) * | 1998-11-26 | 2000-07-12 | 广东省经济特区实业有限公司 | Fan speed regulator with protective function |
| US6747432B2 (en) * | 2002-01-31 | 2004-06-08 | Denso Corporation | Drive apparatus for cooling fan motor for use in vehicle |
| CN1592020A (en) * | 2003-09-03 | 2005-03-09 | 建准电机工业股份有限公司 | Over voltage protecting circuit for dc brushless fan motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1978914A (en) | 2007-06-13 |
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Granted publication date: 20090211 Termination date: 20181129 |
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| CF01 | Termination of patent right due to non-payment of annual fee |