CN1673545A - Method for stopping fan immediately after power-off and structure thereof - Google Patents
Method for stopping fan immediately after power-off and structure thereof Download PDFInfo
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- CN1673545A CN1673545A CNA2004100302898A CN200410030289A CN1673545A CN 1673545 A CN1673545 A CN 1673545A CN A2004100302898 A CNA2004100302898 A CN A2004100302898A CN 200410030289 A CN200410030289 A CN 200410030289A CN 1673545 A CN1673545 A CN 1673545A
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Abstract
The present invention provides method and structure for fan to stop on power off without inertial rotation. While power off, the ends of winding to drive the fan to rotate are short-circuited, so that one induced current will generate in the winding to form one inverse magnetic field braking the fan.
Description
Technical field
The present invention relates to a kind of stopping method, and be particularly related to a kind ofly after fan outage, can allow its method that stops immediately and relevant structure.
Background technique
In numerous consumer products, fan is main heat radiation instrument.When system temperature was too high, fan promptly can activate to reduce the total system temperature, reaches the heat radiation purpose, and when system temperature drops to a particular value, fan promptly can stop action.
Can not burn for fear of total system traditionally, can in system, install a radiation fan additional usually and be protected because temperature is too high.Yet in order to cooperate the heat radiation of the more and more faster assembly of arithmetic speed, rotation speed of the fan requires can be more and more higher, therefore, cause the fan outage after, just fan can stop after still can continuing coasting a period of time fully.
Yet the coasting meeting after the outage of this traditionally fan produces many problems, and at first, the fan user is often because of the continuous running state after the carelessness outage, the fan in the false touch running and cause injured.Secondly, for the maintainer, need to wait for that one section inertial rundown time after fan shuts down fully, just can keep in repair, this section stand-by period, reduced working efficiency.
Summary of the invention
Because above-mentioned conventional fan, after outage because do not have an instant arresting stop, cause fan only can comply with its coasting to stopping, cause the inconvenience in the use, therefore main purpose of the present invention promptly is at above-mentioned shortcoming, proposes the instant stopping method after a kind of fan cuts off the power supply, fan can and be shut down immediately after outage, and do not need one section inertial rundown time, therefore for the maintainer, can promote working efficiency.
Another object of the present invention provides a kind of device that stops immediately after the fan outage that makes, and it can't go coasting again after outage, so can avoid the user of service injured.
The present invention stops the method for fan, wherein this fan has at least one magnetic pole of the stator, this method comprises at least: during outage, make this magnetic pole of the stator form a loop, this loop is subjected to the rotation of fan when outage inertia and produces an induction field, this induction field provides a brake power to rotor, and the action direction of this brake power is opposite with the sense of rotation of fan.
The fan structure that can stop immediately after outage among the present invention comprises at least: a stator magnetic pole; One drive circuit, this magnetic pole of the stator is coupled; One switches circuit, connects this drive circuit, and wherein this diverter circuit is cut off being connected between this magnetic pole of the stator and this drive circuit when outage, and makes this magnetic pole of the stator form a loop; And one control unit connect this diverter circuit in order to control this diverter circuit.
Instant stopping method according to the present invention after the fan outage, it can allow fan force to shut down in the short time, and does not need an inertial rundown time.When the present invention was cut off the power supply at fan, coil two terminal shortcircuits that drive fan can be rotated, the counterelectromotive force that produces when utilizing coil short came instant very blowing-out fan, and wherein this counterelectromotive force is by being produced induction electromotive force when the fan coasting.
According to first embodiment of the invention, under full bridge structure, when fan cuts off the power supply, by the stored residual amount of energy of electric capacity, the controlling and driving intergrated circuit is exported a pilot signal, controls bridge or one group of semiconductor switch conducting of bridge down, allows the coil two ends form short circuit.Or, control bridge or one group of semiconductor switch conducting of bridge down by triggering burning desired control program when the microcontroller chip interrupt is electric, allow the coil two ends form short circuit.
According to second embodiment of the invention, under half-bridge structure, when fan cut off the power supply, by the stored residual amount of energy of electric capacity, the assembly conducting is switched in control one allowed the coil two ends form short circuit.Also can control the semiconductor switch conducting, allow the coil two ends form short circuit by triggering burning desired control program when the microcontroller chip interrupt is electric.
Description of drawings
Below in conjunction with accompanying drawing,, will make technological scheme of the present invention and other beneficial effect apparent by the specific embodiment of the present invention is described in detail.
Figure 1A is depicted as the schematic circuit diagram according to the employed full-bridge circuit structure of first embodiment of the present invention DC fan;
Figure 1B is depicted as the schematic circuit diagram according to the employed full-bridge circuit structure of first embodiment of the present invention DC fan, but has the microcontroller chip of a program in this structure;
Fig. 2 A is depicted as the schematic circuit diagram of employed according to a second embodiment of the present invention half-bridge circuit structure DC fan;
Fig. 2 B is depicted as the schematic circuit diagram of employed according to a second embodiment of the present invention half-bridge circuit structure DC fan, but has the microcontroller chip of a program in this structure.
Embodiment
By instant stopping method of the present invention, can avoid the user because the carelessness after the outage, accident touches still at the fan of coasting and injured.In maintenance process,, therefore can significantly promote working efficiency simultaneously because do not need the stand-by period.Below promptly introduce application of the present invention, but application of the present invention is as the embodiment that be not limited only to the following stated with the embodiment of two DC fan.
Generally speaking, DC fan is to drive flabellum with the magnetic field that inner control circuit changes to rotate, and rotating speed changes with the height of operating voltage.When a conductor dbus excess current, can produce magnetic field on every side, if this conductor is placed another fixed magnetic field, then will produce suction or repulsion, cause movement of objects, when suction and repulsion during greater than the stiction of fan, flabellum rotates naturally.
Figure 1A is depicted as the first embodiment of the present invention, use the schematic circuit diagram of full-bridge circuit structure DC fan, wherein this DC fan comprises rotor and magnetic pole of the stator (not demonstrating among the figure) at least, rotor is rotatable part, magnetic pole of the stator is fixed part, magnetic field around providing can produce magnetic interaction and rotate when the external world provides a power supply by rotor or magnetic pole of the stator.And the present invention forms a loop with fan stator magnetic pole two ends instantaneous short circuit promptly by a kind of circuit design when outage, simultaneously by the inertia motion of fan after outage, produces an induction electromotive force on this loop, and then produces a magnetic field.This magnetic field has a fixed magnetic and the magnetic force size increases and decreases with the fan running speed, and then epitrochanterian magnetic field is produced a power of repelling mutually, with instant evil spirit's blowing-out fan.In this full-bridge circuit structure, two drive integrated circults 102 and 104 are controlled the switching of semiconductor switch 106,107,108 and 109 in order to export two drive signals respectively, wherein this two drive integrated circult 102 and 104 can be a kind of brake control circuit, and the drive signal of being exported phase difference 180 degree each other, employed semiconductor switch can be MOS transistor.And are little signal power supplies 114 in order to control two drive integrated circults 102 and 104 output drive signals.
With drive integrated circult 102 is example, when an output signal makes semiconductor switch 106 conductings, then another output signal can make semiconductor switch 108 close, and this moment, drive integrated circult 104 then can be exported two signals in addition of spending with above-mentioned two signal phase differences 180, came conducting semiconductor switch 109, and close second half conductor switch 107, in other words, at one time down, semiconductor switch 106 and 109, with semiconductor switch 107 and 108, be to be under the same serviceability.Therefore, by the control of drive integrated circult 102 and 104, can make the current transformation direction of flowing through coil 110 produce the magnetic pole of different direction, and make fan rotate.
Yet, when fan cuts off the power supply, because the effect of inertia of fan itself, make fan not shut down moment, therefore, the present invention is by when cutting off the power supply, with coil 110 two ends also instantaneous short circuit, form a loop, this moment is because of the inertia motion of fan after outage, can make the magnetic flux on this loop change, and on this loop, produce an induction electromotive force, and in coil, form induction current, this induction current will make coil produce the coasting of an opposing magnetic field prevention fan, and stop fan immediately, the brake power size that wherein opposing magnetic field provided is directly proportional with fan coasting speed.Just, in outage, controlling and driving intergrated circuit 102 and 104 allows semiconductor switch 106 and 107, or semiconductor switch 108 and 109 while conductings, makes 110 liang of terminal shortcircuits of coil.In other words, can select semiconductor switch 106 and 107 conductings simultaneously, and semiconductor switch 108 and 109 not conductings; Or semiconductor switch 106 and 107 not conductings, and semiconductor switch 108 and 109 conductings simultaneously.
And in the method for outage moment control two ends coil short, structure according to Figure 1A, when the moment of fan outage, little signal power supply 114 is by the stored residual amount of energy of electric capacity 112, to drive integrated circult 102 and 104 outputs, one pilot signal, control semiconductor switch 106 with 107 or semiconductor switch 108 and 109 wherein arbitrary group of conducting another organize not conducting, allow the formation short circuit of coil 110 two ends.
This kind allows coil 110 two ends form the method for short circuit, also can adopt another kind of mode, be depicted as the another kind of structure of full-bridge type DC fan as Figure 1B, but in this structure, adopt the microcontroller chip 116 of a program to come the output signal of drive integrated circult 102 and 104 is controlled.But because the microcontroller chip 116 that has a program in this structure, therefore, can be so far in the microcontroller chip 116 with outage time control processing procedure sequence replication, in case during outage, in this microcontroller chip 116 during stored outage control program can be triggered, and control semiconductor switch 106 and 107 or semiconductor switch 108 and 109 wherein arbitrary group of conducting another organize not conducting, allow coil 110 two ends form short circuit, by the inertia motion of fan after outage, immediately in coil 110, form an induction current and produce an opposing magnetic field, and stop fan immediately with the coasting of prevention fan.
Be second embodiment with a semibridge system DC fan again, consult the schematic circuit diagram that Fig. 2 A is depicted as a use half-bridge circuit structure DC fan.In this half-bridge circuit structure 200, two semiconductor switch 202 and 204 are controlled by two pulse signals of phase difference 180 degree respectively, and flowing through coil 206 and 208 is to produce magnetic force respectively with the control electric current, and wherein employed semiconductor switch can be MOS transistor.
As first embodiment, when fan cuts off the power supply, present embodiment also by in outage time with coil 206 and 208 two ends instantaneous short circuit, the inertia motion after the fan outage produces induction current in coil allows opposing magnetic field of coil generation stop fan.The present invention adds one in coil 206 and 208 and switches assemblies 210, when the moment of fan outage, utilizes the stored residual amount of energy of electric capacity 212, and control changeover module 210 conductings even make not conducting of semiconductor switch simultaneously allow coil 206 and 208 two ends form short circuit.This changeover module 210 also can be a relay, and when outage, conducting automatically allows coil 206 and 208 two ends form short circuit.
This kind coil 206 and 208 two ends form the method for short circuit, also can adopt another kind of mode, be depicted as the another kind of structure of semibridge system DC fan as Fig. 2 B, but the microcontroller chip 216 that has a program in this structure is controlled the switching of semiconductor switch 202 and 204.The desired control burning program is so far in the microcontroller chip 216 by will cut off the power supply the time, in case during outage, stored outage control program can be triggered in this microcontroller chip 216, and control semiconductor switch 202 and 204 conductings, allows coil 206 and 208 two ends form short circuit and stops fan.
Instant stopping method after the fan of the present invention outage is by the coil two ends instantaneous short circuit of each utmost point of stator being formed a loop, utilizing the inertia motion of fan after outage again, and produce an induction electromotive force on this loop, and then produce a magnetic field.Can not disappear because this induction electromotive force can residue in the process of fan inertia rotation in this loop, so the magnetic in this magnetic field can be fixed and magnetic force can increase and decrease with running speed, and then epitrochanterian magnetic field is produced a power of repelling mutually.Because the action direction of this power is opposite with the fan sense of rotation, thus can be used as but power of powerful resistance, with instant evil spirit's blowing-out fan.Therefore, can avoid the user because the carelessness after the outage, accident touches still at the fan of coasting and injured.In maintenance process,, therefore can significantly promote working efficiency simultaneously because need not wait for this section coasting stop time.And on the other hand, the present invention does not need to add extra circuit to circuit structure originally, therefore need not change original circuit design.
The above; for the person of ordinary skill of the art; can make other various corresponding changes and distortion according to technological scheme of the present invention and technical conceive, and all these changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (10)
1, a kind of method that stops fan immediately, wherein this fan has at least one magnetic pole of the stator, and this method comprises at least:
During outage, make this magnetic pole of the stator form a loop, this loop is subjected to the rotation of fan when outage inertia and produces an induction field, and this induction field provides a brake power to rotor, and the action direction of this brake power is opposite with the sense of rotation of fan.
2, the method that stops fan immediately according to claim 1, wherein this magnetic pole of the stator is made of at least one coil.
3, the method that stops fan immediately according to claim 1, wherein this magnetic pole of the stator directly is connected with one drive circuit, or switches the circuit connection via one.
4, the method that stops fan immediately according to claim 3, wherein this diverter circuit the time is cut off being connected between this magnetic pole of the stator and this drive circuit in outage, and makes this magnetic pole of the stator formation loop.
5, the method that stops fan immediately according to claim 3, wherein this diverter circuit is full bridge structure or half-bridge structure.
6, the method that stops fan immediately according to claim 3, wherein the driving electric power of this diverter circuit is provided by a storage capacitors.
7, a kind of fan structure that can stop immediately after outage is characterized in that this structure comprises at least:
One stator magnetic pole;
One drive circuit, this magnetic pole of the stator is coupled;
One switches circuit, connects this drive circuit, and wherein this diverter circuit is cut off being connected between this magnetic pole of the stator and this drive circuit when outage, and makes this magnetic pole of the stator form a loop; And
One control unit connects this diverter circuit in order to control this diverter circuit.
8, fan structure according to claim 7 is characterized in that, this structure also comprises a storage capacitors and drives electric power in order to this control unit to be provided.
9, fan structure according to claim 7 is characterized in that, wherein this diverter circuit is full bridge structure or half-bridge structure.
10, fan structure according to claim 7 is characterized in that, this control unit is transistor, intergrated circuit or brake control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100302898A CN1673545A (en) | 2004-03-23 | 2004-03-23 | Method for stopping fan immediately after power-off and structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100302898A CN1673545A (en) | 2004-03-23 | 2004-03-23 | Method for stopping fan immediately after power-off and structure thereof |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101109997A Division CN101846092B (en) | 2004-03-23 | 2004-03-23 | Method for instantly shutting down fan after power cut and structure thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1673545A true CN1673545A (en) | 2005-09-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2004100302898A Pending CN1673545A (en) | 2004-03-23 | 2004-03-23 | Method for stopping fan immediately after power-off and structure thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN1673545A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100401630C (en) * | 2006-04-21 | 2008-07-09 | 全捷 | Self-braking electronic module of electric tools |
| CN1988360B (en) * | 2005-12-19 | 2010-04-28 | 台达电子工业股份有限公司 | Fan system and its braking method |
| CN101325389B (en) * | 2007-06-12 | 2011-11-09 | 台达电子工业股份有限公司 | Fan system and detecting device thereof |
| CN1988363B (en) * | 2005-12-19 | 2012-01-11 | 台达电子工业股份有限公司 | Motor control system and its switch device |
| CN105650016A (en) * | 2014-11-21 | 2016-06-08 | 奇鋐科技股份有限公司 | Circuit for outage brake of DC fan |
| CN106329821A (en) * | 2015-06-26 | 2017-01-11 | 佛山市建准电子有限公司 | Motor system and fan system using same |
| CN111134577A (en) * | 2020-01-03 | 2020-05-12 | 北京石头世纪科技股份有限公司 | Fan control method and system |
| CN111535915A (en) * | 2020-06-03 | 2020-08-14 | 龙城电装（常州）有限公司 | Control circuit for cooling fan controller |
-
2004
- 2004-03-23 CN CNA2004100302898A patent/CN1673545A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1988360B (en) * | 2005-12-19 | 2010-04-28 | 台达电子工业股份有限公司 | Fan system and its braking method |
| CN1988363B (en) * | 2005-12-19 | 2012-01-11 | 台达电子工业股份有限公司 | Motor control system and its switch device |
| CN100401630C (en) * | 2006-04-21 | 2008-07-09 | 全捷 | Self-braking electronic module of electric tools |
| CN101325389B (en) * | 2007-06-12 | 2011-11-09 | 台达电子工业股份有限公司 | Fan system and detecting device thereof |
| CN105650016A (en) * | 2014-11-21 | 2016-06-08 | 奇鋐科技股份有限公司 | Circuit for outage brake of DC fan |
| CN106329821A (en) * | 2015-06-26 | 2017-01-11 | 佛山市建准电子有限公司 | Motor system and fan system using same |
| CN106329821B (en) * | 2015-06-26 | 2018-11-20 | 佛山市建准电子有限公司 | Motor system and the fan system for using the motor system |
| CN111134577A (en) * | 2020-01-03 | 2020-05-12 | 北京石头世纪科技股份有限公司 | Fan control method and system |
| CN111535915A (en) * | 2020-06-03 | 2020-08-14 | 龙城电装（常州）有限公司 | Control circuit for cooling fan controller |
| CN111535915B (en) * | 2020-06-03 | 2021-11-26 | 龙城电装（常州）有限公司 | Control circuit for cooling fan controller |
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Open date: 20050928 |