CN1501577A - Automatic switching method for stand-by electric fan and circuit thereof - Google Patents
Automatic switching method for stand-by electric fan and circuit thereof Download PDFInfo
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- CN1501577A CN1501577A CNA021487529A CN02148752A CN1501577A CN 1501577 A CN1501577 A CN 1501577A CN A021487529 A CNA021487529 A CN A021487529A CN 02148752 A CN02148752 A CN 02148752A CN 1501577 A CN1501577 A CN 1501577A
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- 230000010354 integration Effects 0.000 claims description 12
- 230000002159 abnormal effect Effects 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 2
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- 238000012423 maintenance Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
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Abstract
A standby fan automatic switchover method and circuit thereof which can be fitted to a fan system, the fan system at least has a main fan device and a stand-by fan device, when abnormal operation occurs to the main fan device, the stand-by fan device can be started to replace it for wind supplying. The invention also discloses a standby fan automatic switchover method and circuit thereof, which can lower the hardware cost and improve reliability compared with the prior art.
Description
Skill this area
The present invention is about a kind of circuit engineering, particularly about a kind of spare fans automatic switching method and circuit thereof, its can arrange in pairs or groups fan system and fan system have a main fan device and a spare fans device at least, and starting spare fans device replaces the air-supply function of main fan device when unusual in order to operate at the main fan device.
Background technology
Electronic system be because running the time can produce heat, and therefore this heat wherein generally be provided with fan assembly and dispel the heat if accumulation too much may destroy the circuit in the electronic system, protects the circuit in the electronic system can not be subjected to cause thermal damage whereby when running.
In addition, reliability in order to ensure the fan heat sinking function, the general practice is to adopt at least two fan assemblys, comprises a main fan device and a spare fans device, and only starts the main fan device at ordinary times and carry out the air-supply function and make the spare fans device on the shelf; And operate when unusual at the main fan device, just immediately the main fan device is closed and start the air-supply function that the spare fans device replaces the main fan device.
Whether at present existing many various spare fans automatic switching methods can be used to detect automatically the main fan device and operate normally, and operate when unusual at the main fan device and the main fan device to be closed and start the air-supply function that the spare fans device replaces the main fan device.
And a kind of known technology is arranged at present is to adopt microprocessor to detect the whether normal operation of main fan device, and operates when unusual at the main fan device, the main fan device is closed and starts the spare fans device.
Yet the price that a shortcoming that adopts microprocessor to carry out the spare fans automatically switching operation is required microprocessor is higher, therefore will increase the cost of manufacture of fan system greatly.In addition, because microprocessor is compared with the electronic component of other kind and had higher failure rate, the reliability of the spare fans automatic switch-over circuit of therefore feasible employing microprocessor is relatively poor.
Summary of the invention
In order to overcome the shortcoming of prior art, main purpose of the present invention is to be to provide a kind of spare fans automatic switching method and circuit thereof, and it can adopt microprocessor to carry out rotation speed of the fan and detect and handover operation, reduces required hardware cost whereby.
Another object of the present invention is to provide a kind of spare fans automatic switching method and circuit thereof, it can have higher reliability.
For achieving the above object, the present invention provides a kind of spare fans automatic switching method in practice, it has a main fan device and a spare fans device at least applicable to fan system and fan system, starts described spare fans device when unusual in order to operate at the main fan device; The spare fans automatic switching method comprises at least:
(1) obtains the rotation speed of the fan pulse train that the main fan device produces in the running;
(2) the rotation speed of the fan pulse train that the main fan device is produced carries out integration, tries to achieve its integrated value to the time whereby; And
(3) relatively whether integrated value is lower than default critical value; If then close the main fan device and start described spare fans device simultaneously.
Spare fans automatic switching method of the present invention can also further comprise following steps
(4) obtain the rotation speed of the fan pulse train that described spare fans device produces in the running;
(5) the rotation speed of the fan pulse train that described spare fans device is produced carries out integration, tries to achieve its integrated value to the time whereby; And
(6) whether more described integrated value is lower than default critical value; If then produce alarm signal.
The present invention also provides a kind of spare fans automatic switching method, and it has a main fan device and a spare fans device at least applicable to fan system and fan system, the unusual time starting spare fans device in order to operate at the main fan device; The spare fans automatic switching method comprises at least:
(1) obtains the rotation speed of the fan pulse train that the main fan device is produced in the running;
(2) the rotation speed of the fan pulse train that the main fan device is produced carries out integration, tries to achieve its integrated value to the time whereby;
(3) relatively whether integrated value is lower than default critical value; If then close described main fan device and start described spare fans device simultaneously;
(4) obtain the rotation speed of the fan pulse train that the spare fans device is produced in the running;
(5) the rotation speed of the fan pulse train that the spare fans device is produced carries out integration, tries to achieve its integrated value to the time whereby; And
(6) relatively whether integrated value is lower than default critical value; If then produce alarm signal.
In addition, the present invention also provides a kind of spare fans automatic switch-over circuit, its can arrange in pairs or groups fan system and fan system have a fans drive unit, a main fan device and a spare fans device at least, start described spare fans device when unusual in order to operate at the main fan device; The spare fans automatic switch-over circuit comprises at least:
(a) switch unit, it is preset as the fans drive unit is connected to the main fan device; And can receive when switching enable signal, the fans drive unit is switched to be connected to the spare fans device;
(b) rotation speed of the fan pulse feedback unit, it is connected to the main fan device, in order to feed back the rotation speed of the fan pulse train that described main fan device is produced in the running;
(c) integrator, it is connected to rotation speed of the fan pulse feedback unit, carries out integration in order to the rotation speed of the fan pulse train that rotation speed of the fan pulse feedback unit is fed back, and exports the integral voltage signal whereby; And
(d) comparator, it can compare the integral voltage voltage of signals value that integrator exports and whether be lower than default critical voltage value; If then produce and switch enable signal, with being connected to described spare fans device so that switch unit switches to described fans drive unit.
Spare fans automatic switch-over circuit of the present invention also can further comprise:
The rotation speed of the fan pulse feedback unit of spare fans device, it links to each other with the spare fans device, in order to the rotation speed of the fan pulse train of feedback spare fans device generation when rotating;
The integrator of spare fans device, it links to each other with the rotation speed of the fan pulse feedback unit of spare fans device, and the rotation speed of the fan pulse train that feeds back in order to the rotation speed of the fan pulse feedback unit to the spare fans device carries out integration, exports the integral voltage signal whereby;
The comparator of spare fans device, whether its integral voltage voltage of signals value that can compare the integrator output of spare fans device is lower than default critical voltage value; If then produce the caution enable signal; And
The alarm signal generator, the caution enable signal that its comparator that can respond described spare fans device produces and produce alarm signal.
In other words, spare fans automatic switching method of the present invention and circuit thereof are that an arrange in pairs or groups fan system and fan system has a main fan device and a spare fans device, in order to detect the whether normal operation of main fan device; And operate when unusual at the main fan device, the main fan device is closed and start the spare fans device.
The characteristics of spare fans automatic switching method of the present invention and circuit thereof are to adopt basic electronic component but not adopt microprocessor to carry out and detect and handover operation, therefore reduce required hardware cost more and increase reliability than known technology.
In sum, the invention provides a kind of spare fans automatic switching method and circuit thereof of novelty, its can arrange in pairs or groups fan system and fan system have a main fan device and a spare fans device at least, and starting spare fans device replaces the air-supply function of main fan device when unusual in order to operate at this main fan device; Its characteristics are to adopt basic electronic component but not adopt microprocessor to carry out and detect and handover operation, therefore can more reduce required hardware cost and increase reliability than known technology.
Description of drawings
Essence technology contents of the present invention and embodiment have been disclosed in the accompanying drawing kind of specification in detail with graphic mode.The content Description of accompanying drawing is as follows:
Fig. 1 is a system block diagram, and it represents the basic circuit structure of first embodiment of spare fans automatic switch-over circuit of the present invention; Label 10 expression heat transmission fan systems; Label 20 expression fans drive unit; Label 10A represents the main fan device; Label 10B represents the spare fans device; The spare fans automatic switch-over circuit of label 100 expression first embodiment of the invention; Label 110 expression switch units; Label 120A represents rotation speed of the fan pulse feedback unit; Label 130A represents integrator; Label 140A represents comparator;
Fig. 2 is a system block diagram, and it represents the basic circuit structure of second embodiment of spare fans automatic switch-over circuit of the present invention; Wherein label 100 ' is represented the spare fans automatic switch-over circuit of second embodiment of the invention; Label 120B represents rotation speed of the fan pulse feedback unit; Label 130B represents the label integrator; Label 140B represents comparator; Label 150 expression alarm signal generators;
Fig. 3 to Fig. 5 is a signal waveforms, the signal waveform of the rotation speed of the fan pulse train that its expression fan assembly that the present invention was suitable for is produced under different rotating speeds.
Embodiment
Below promptly in conjunction with the accompanying drawings, describe each different embodiment of spare fans automatic switching method of the present invention and circuit thereof in detail.
Embodiment one
Fig. 1 represents the basic circuit structure of first embodiment (as the part that frame of broken lines comprised of label 100 indications) of spare fans automatic switch-over circuit of the present invention.As shown in the figure, the spare fans automatic switch-over circuit 100 of first embodiment of the invention is the fan system 10 of heat transmission of arranging in pairs or groups in actual applications, and fan system 10 has a main fan device 10A, a spare fans device 10B and a fans drive unit 20 at least.
What should be noted that here a bit is, the fan system that the present invention was suitable for is not limited to only comprise a spare fans device, also can comprise two or plural spare fans device.The embodiment here is that example explains with a spare fans device only, but basic conception of the present invention also is applicable to have two or the fan system of plural spare fans device.
The spare fans automatic switch-over circuit 100 of first embodiment of the invention comprises at least: (a) switch unit 110; (b) rotation speed of the fan pulse feedback unit 120A; (c) integrator 130A; And (d) comparator 140A.
In other words, switch unit 110 begins to be preset in order to fans drive unit 20 is connected to main fan device 10A, whereby to drive the running of main fan device 10A; And can when switch-over control signal input C receives switching enable signal SW, fans drive unit 20 be switched to connection spare fans device 10B, also close main fan device 10A simultaneously with the running that drives spare fans device 10B whereby.
Rotation speed of the fan pulse feedback unit 120A is connected to main fan device 10A, in order to feed back the rotation speed of the fan pulse train P that main fan device 10A is produced in the running
AThe signal waveforms of Fig. 3-Fig. 5 is represented the rotation speed of the fan pulse train P that main fan device 10A is produced under different rotating speeds
ASignal waveform; Wherein Fig. 3 represents the rotation speed of the fan pulse train P that main fan device 10A is produced under high running speed
ASignal waveform; Fig. 4 represents the rotation speed of the fan pulse train P that main fan device 10A is produced under low running speed
ASignal waveform; And Fig. 5 represents the rotation speed of the fan pulse train P that main fan device 10A is produced in the time of can't rotating being blocked by external force
ASignal waveform.The rotation speed of the fan pulse train P of feedback
ACan directly take from the motor circuit (in graphic, not showing) of main fan device 10A.
In concrete enforcement, above-mentioned comparator 140A can for example be that (it can be at V for Operational Amplifier, OP) constructed analog comparator (analogcomparator) for operational amplifier
A〉=V
THThe time, keeping its output is the logic low potential state; And in V
A＜V
THThe time, then produce the logic high potential signal, in order to as aforesaid switching enable signal SW at its output.Since comparator 140A this as a kind of known circuit member, therefore followingly will not do explanation in further detail to its internal circuit structure.
In actual applications, because switch unit 110 is preset to fans drive unit 20 is connected to main fan device 10A, therefore when start, can make fans drive unit 20 only drive main fan device 10A and do not drive spare fans device 10B.
When main fan device 10A entry into service, the rotation speed of the fan pulse train P that it produced
ACan feed back to integrator 130A by rotation speed of the fan pulse feedback unit 120A, cause integrator 130A that it is carried out integral action and produces integral voltage signal V
A, and integral voltage signal V
AMagnitude of voltage promptly represent the rotation speed of the fan pulse train P of feedback
AIntegrated value to the time.
The integral voltage signal V that integrator 130A is produced
AThen be sent to comparator 140A, whereby with by comparator 140A with integral voltage signal V
AMagnitude of voltage and default critical voltage value V
THMake comparisons, differentiate integral voltage signal V whereby
AMagnitude of voltage whether be lower than default critical voltage value V
THIf then produce one and switch enable signal SW, and this is switched the switch-over control signal input C that enable signal SW is sent to switch unit 110.
The switch-over control signal input C of switch unit 110 is when receiving switching enable signal SW, its input IN will be changed to switch to from the first original output OUT1 and be connected to the second output OUT2, just fans drive unit 20 is changed to switch to and be connected to spare fans device 10B, drive spare fans device 10B whereby and close main fan device 10A simultaneously; Promptly change the air-supply function that replaces main fan device 10A by spare fans device 10B.
Embodiment two
Fig. 2 represents the basic circuit framework of second embodiment (as the part that frame of broken lines comprised of label 100 ' indication) of spare fans automatic switch-over circuit of the present invention.In second embodiment shown in Figure 2, the member identical with first embodiment is denoted by the same reference numerals.
First embodiment of the invention shown in Figure 1 only can be when unusual condition takes place in main fan device 10A, fans drive unit 20 is changed to switch to be connected to spare fans device 10B, whereby to be replaced the air-supply function of main fan device 10A by spare fans device 10B; Second embodiment herein then can send alarm signal and notify the user to carry out necessary maintenance work further when spare fans device 10B also have unusual condition.
As shown in Figure 2,100 ' of the spare fans automatic switch-over circuit of second embodiment of the invention with the aforesaid first embodiment difference be that it further comprises: rotation speed of the fan pulse feedback unit 120B; Integrator 130B; Comparator 140B; And alarm signal generator 150.
The function of rotation speed of the fan pulse feedback unit 120B, integrator 130B and comparator 140B fully with aforesaid first embodiment in rotation speed of the fan pulse feedback unit 120A, integrator 130A identical with comparator 140A; Therefore will not do the explanation of repetition at this to its function.
When spare fans device 10B also has unusual condition, it will cause comparator 140B to produce the logic high potential signal, in order to conduct caution enable signal ALARM, and this caution enable signal ALARM is sent to alarm signal generator 150, cause alarm signal generator 150 to send alarm signal and notify the user that described fan system 10 is carried out necessary maintenance work.
The above is preferred embodiment of the present invention only, is not in order to limit the scope of essence technology contents of the present invention.Essence technology contents of the present invention broadly is defined in claims.If any technology entity or method that other people are finished identical or be a kind of change of equivalence with the scope of claims definition, all will be regarded as being encompassed among this patent protection.
Claims (8)
1. spare fans automatic switching method, it has a main fan device and a spare fans device at least applicable to fan system and described fan system, starts described spare fans device when unusual in order to operate at described main fan device; It is characterized in that:
Described spare fans automatic switching method comprises at least:
(1) obtains the rotation speed of the fan pulse train that described main fan device produces in the running;
(2) the rotation speed of the fan pulse train that described main fan device is produced carries out integration, tries to achieve its integrated value to the time whereby; And
(3) whether more described integrated value is lower than default critical value; If then close described main fan device and start described spare fans device simultaneously.
2. spare fans automatic switching method as claimed in claim 1 is characterized in that: in step (3) afterwards, further comprise following steps:
(4) obtain the rotation speed of the fan pulse train that described spare fans device produces in the running;
(5) the rotation speed of the fan pulse train that described spare fans device is produced carries out integration, tries to achieve its integrated value to the time whereby; And
(6) whether more described integrated value is lower than default critical value; If then produce alarm signal.
3. spare fans automatic switching method, it has a main fan device and a spare fans device at least applicable to fan system and described fan system, starts described spare fans device when unusual in order to operate at described main fan device; It is characterized in that:
Described spare fans automatic switching method comprises at least:
(1) obtains the rotation speed of the fan pulse train that described main fan device is produced in the running;
(2) the rotation speed of the fan pulse train that described main fan device is produced carries out integration, tries to achieve its integrated value to the time whereby;
(3) whether more described integrated value is lower than default critical value; If then close described main fan device and start described spare fans device simultaneously;
(4) obtain the rotation speed of the fan pulse train that described spare fans device is produced in the running;
(5) the rotation speed of the fan pulse train that described spare fans device is produced carries out integration, tries to achieve its integrated value to the time whereby; And
(6) whether more described integrated value is lower than default critical value; If then produce alarm signal.
4. spare fans automatic switch-over circuit, it can be arranged in pairs or groups to fan system and described fan system and have a fans drive unit, a main fan device and a spare fans device at least, starts described spare fans device when unusual in order to operate at described main fan device; It is characterized in that:
Described spare fans automatic switch-over circuit comprises at least:
(a) switch unit, it is preset as described fans drive unit is connected to described main fan device; And can receive when switching enable signal, described fans drive unit is switched to be connected to described spare fans device;
(b) rotation speed of the fan pulse feedback unit, it is connected to described main fan device, in order to feed back the rotation speed of the fan pulse train that described main fan device is produced in the running;
(c) integrator, it is connected to described rotation speed of the fan pulse feedback unit, carries out integration in order to the rotation speed of the fan pulse train that described rotation speed of the fan pulse feedback unit is fed back, and exports the integral voltage signal whereby; And
(d) comparator, whether its integral voltage voltage of signals value of can more described integrator exporting is lower than default critical voltage value; If, then produce and switch enable signal, be connected to described spare fans device in order to make described switch unit that described fans drive unit is switched to.
5. spare fans automatic switch-over circuit as claimed in claim 4 is characterized in that: described spare fans automatic switch-over circuit further comprises:
The rotation speed of the fan pulse feedback unit of spare fans device, it links to each other with described spare fans device, in order to feed back the rotation speed of the fan pulse train that described spare fans device is produced when rotating;
The integrator of spare fans device, it links to each other with the rotation speed of the fan pulse feedback unit of described spare fans device, the rotation speed of the fan pulse train that is fed back in order to the rotation speed of the fan pulse feedback unit to described spare fans device carries out integration, exports the integral voltage signal whereby;
The comparator of spare fans device, whether the integral voltage voltage of signals value that the integrator that it can more described spare fans device is exported is lower than default critical voltage value; If then produce the caution enable signal; And
The alarm signal generator, it can respond the caution enable signal that comparator produced of described spare fans device and produce alarm signal.
6. spare fans automatic switch-over circuit as claimed in claim 4 is characterized in that: the comparator of described main fan device is the constructed analog comparator of operational amplifier.
7. spare fans automatic switch-over circuit as claimed in claim 5 is characterized in that: the comparator of described spare fans device is the constructed analog comparator of operational amplifier.
8. spare fans automatic switch-over circuit as claimed in claim 4 is characterized in that: described fans drive unary system adopts pulse modulation technology to control the running speed of described main fan device and described spare fans device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02148752 CN1266822C (en) | 2002-11-15 | 2002-11-15 | Automatic switching method for stand-by electric fan and circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02148752 CN1266822C (en) | 2002-11-15 | 2002-11-15 | Automatic switching method for stand-by electric fan and circuit thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1501577A true CN1501577A (en) | 2004-06-02 |
| CN1266822C CN1266822C (en) | 2006-07-26 |
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ID=34233313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02148752 Expired - Fee Related CN1266822C (en) | 2002-11-15 | 2002-11-15 | Automatic switching method for stand-by electric fan and circuit thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1266822C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1852647B (en) * | 2006-05-29 | 2010-05-12 | 迈普通信技术股份有限公司 | Communication apparatus radiating device |
| CN101303393B (en) * | 2007-05-08 | 2011-01-05 | 鸿富锦精密工业（深圳）有限公司 | Monitoring system and monitoring method of motor operation |
| CN106907343A (en) * | 2015-12-23 | 2017-06-30 | 新唐科技股份有限公司 | Fan driving system and fan driving simulation chip |
-
2002
- 2002-11-15 CN CN 02148752 patent/CN1266822C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1852647B (en) * | 2006-05-29 | 2010-05-12 | 迈普通信技术股份有限公司 | Communication apparatus radiating device |
| CN101303393B (en) * | 2007-05-08 | 2011-01-05 | 鸿富锦精密工业（深圳）有限公司 | Monitoring system and monitoring method of motor operation |
| CN106907343A (en) * | 2015-12-23 | 2017-06-30 | 新唐科技股份有限公司 | Fan driving system and fan driving simulation chip |
| CN106907343B (en) * | 2015-12-23 | 2019-04-05 | 新唐科技股份有限公司 | Fan driving system and fan driving simulation chip |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1266822C (en) | 2006-07-26 |
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Inventor after: Qian Wei Inventor before: Zhang Chaohuang |
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Effective date of registration: 20170918 Address after: The new Hong garden Canglang District of Suzhou city in Jiangsu Province, building 54, Room 302 Patentee after: Qian Wei Address before: Taiwan, China Patentee before: Inventec Corporation |
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Address after: 541399 South 50 meters south of Xingan County, Xingan County, Guilin City, the Guangxi Zhuang Autonomous Region Patentee after: Qian Wei Address before: The new Hong garden Canglang District of Suzhou city in Jiangsu province 215000 building 54 Room 302 Patentee before: Qian Wei |
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Granted publication date: 20060726 Termination date: 20171115 |