TWI413358B - Used for fan control systems - Google Patents

Used for fan control systems Download PDF

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Publication number
TWI413358B
TWI413358B TW098131448A TW98131448A TWI413358B TW I413358 B TWI413358 B TW I413358B TW 098131448 A TW098131448 A TW 098131448A TW 98131448 A TW98131448 A TW 98131448A TW I413358 B TWI413358 B TW I413358B
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Taiwan
Prior art keywords
signal
microcontroller
control system
fan
control
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TW098131448A
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Chinese (zh)
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TW201112610A (en
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Sunonwealth Electr Mach Ind Co
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Priority to TW098131448A priority Critical patent/TWI413358B/en
Priority to US12/767,312 priority patent/US20110070098A1/en
Publication of TW201112610A publication Critical patent/TW201112610A/en
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Publication of TWI413358B publication Critical patent/TWI413358B/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/004Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00Pumping installations or systems
    • F04D25/16Combinations of two or more pumps ; Producing two or more separate gas flows
    • F04D25/166Combinations of two or more pumps ; Producing two or more separate gas flows using fans
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P29/00Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
    • H02P29/02Providing protection against overload without automatic interruption of supply
    • H02P29/024Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
    • H02P29/0241Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the fault being an overvoltage
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Electric Motors In General (AREA)
  • Control Of Positive-Displacement Air Blowers (AREA)

Abstract

The present invention relates to a fan control system. The fan control system includes a first micro controller, a second micro controller and a first logic circuit. The first micro controller provides at least one first control signal. The second micro controller is connected to the first micro controller. The second micro controller detects operational status of the first micro controller, and provides at least one second control signal. The first logic circuit receives the first control signal and the second control signal to process logic operation and to generate at least one driving signal to fan. The fan control system of the invention utilizes two micro controllers, when one of the two micro controllers malfunctions, the first logic circuit allows the other micro controller to continue proper operation of the fan, thereby preventing the problem of insufficient heat dissipation that results from malfunction of the single micro controller of a conventional fan control system.

Description

用於風扇之控制系統Control system for fans

本發明係關於一種控制系統,詳言之,係關於一種用於風扇之控制系統。The present invention relates to a control system, and more particularly to a control system for a fan.

參考圖1,其顯示習知用於風扇之控制系統之電路方塊示意圖。習知控制系統10包括一微控制器11,用以提供脈波寬度調變訊號(PWM)至風扇散熱群組12,風扇散熱群組12具有複數個風扇,用以散熱。由於習知控制系統10僅具有單一微控制器11,當該微控制器11異常時,將無法提供脈波寬度調變訊號至風扇散熱群組12,造成風扇散熱群組12內之所有風扇無法運轉進行散熱,使得整個系統之散熱不足,可能造成整個系統之不穩定或誤動作。Referring to Figure 1, there is shown a circuit block diagram of a conventional control system for a fan. The conventional control system 10 includes a microcontroller 11 for providing a pulse width modulation signal (PWM) to the fan heat dissipation group 12, and the fan heat dissipation group 12 has a plurality of fans for heat dissipation. Since the conventional control system 10 only has a single microcontroller 11, when the microcontroller 11 is abnormal, the pulse width modulation signal will not be provided to the fan cooling group 12, causing all fans in the fan cooling group 12 to fail. Operation to dissipate heat, so that the entire system is insufficiently dissipated, which may cause instability or malfunction of the entire system.

因此,有必要提供一種創新且具進步性的用於風扇之控制系統,以解決上述問題。Therefore, it is necessary to provide an innovative and progressive control system for a fan to solve the above problems.

本發明提供一種用於風扇之控制系統,包括:一第一微控制器、一第二微控制器及一第一邏輯電路。該第一微控制器用以提供至少一第一控制訊號。該第二微控制器與該第一微控制器連接,用以偵測該第一微控制器之使用狀態,該第二微控制器提供至少一第二控制訊號。該第一邏輯電路接收該第一控制訊號及該第二控制訊號,進行邏輯運算,以產生至少一驅動訊號至風扇。The invention provides a control system for a fan, comprising: a first microcontroller, a second microcontroller and a first logic circuit. The first microcontroller is configured to provide at least one first control signal. The second microcontroller is coupled to the first microcontroller for detecting a state of use of the first microcontroller, and the second microcontroller provides at least one second control signal. The first logic circuit receives the first control signal and the second control signal, and performs a logic operation to generate at least one driving signal to the fan.

本發明用於風扇之控制系統利用二微控制器,在其中之一微控制器異常時,另一微控制器能經由第一邏輯電路確保風扇繼續運轉,以解決習知控制系統因單一微控制器異常造成風扇無法運轉之散熱不足問題。另外,二微控制器能互相偵測使用狀態,當其中之一微控制器異常時,可使警示器動作,以進行檢修處理,使該控制系統恢復正常。The control system for the fan of the present invention utilizes two microcontrollers, and when one of the microcontrollers is abnormal, the other microcontroller can ensure that the fan continues to operate via the first logic circuit to solve the conventional control system due to a single micro control. The abnormality caused by the abnormality of the fan caused the fan to fail. In addition, the two micro-controllers can mutually detect the state of use. When one of the microcontrollers is abnormal, the alerter can be activated to perform an overhaul process to restore the control system to normal.

參考圖2,其顯示本發明用於風扇之控制系統之電路方塊示意圖。本發明用於風扇之控制系統20包括:一第一微控制器21、一第二微控制器22及一第一邏輯電路23。該第一微控制器21用以提供至少一第一控制訊號至該第一邏輯電路23。在本實施例中,該第一控制訊號係為第一脈波寬度調變訊號。Referring to Figure 2, there is shown a circuit block diagram of a control system for a fan of the present invention. The control system 20 for a fan of the present invention includes a first microcontroller 21, a second microcontroller 22 and a first logic circuit 23. The first microcontroller 21 is configured to provide at least one first control signal to the first logic circuit 23. In this embodiment, the first control signal is a first pulse width modulation signal.

該第二微控制器22與該第一微控制器21連接,用以偵測該第一微控制器21之使用狀態,該第二微控制器提供至少一第二控制訊號至該第一邏輯電路23。該第一邏輯電路23接收該第一控制訊號及該第二控制訊號,進行邏輯運算,以產生至少一驅動訊號給至少一風扇。在本實施例中,該等風扇係為風扇散熱群組30,風扇散熱群組30具有12個風扇。The second microcontroller 22 is connected to the first microcontroller 21 for detecting the usage status of the first microcontroller 21. The second microcontroller provides at least one second control signal to the first logic. Circuit 23. The first logic circuit 23 receives the first control signal and the second control signal, and performs a logic operation to generate at least one driving signal to the at least one fan. In this embodiment, the fans are the fan heat dissipation group 30, and the fan heat dissipation group 30 has 12 fans.

在本實施例中,該第一邏輯電路23係為邏輯或(OR)電路,對該第一控制訊號及該第二控制訊號進行邏輯或(OR)運算。該第一控制訊號係為第一脈波寬度調變訊號,當該第二微控制器22偵測該第一微控制器21於正常運轉狀態時,該第二控制訊號為低邏輯準位訊號(L),經該第一邏輯電路23之邏輯或(OR)運算,使該驅動訊號為第一脈波寬度調變訊號。In this embodiment, the first logic circuit 23 is a logical OR circuit that performs a logical OR operation on the first control signal and the second control signal. The first control signal is a first pulse width modulation signal. When the second microcontroller 22 detects that the first microcontroller 21 is in a normal operating state, the second control signal is a low logic level signal. (L), the logic signal (OR) operation of the first logic circuit 23 causes the driving signal to be a first pulse width modulation signal.

當第二微控制器22偵測該第一微控制器21於異常狀態時,該第二控制訊號為高邏輯準位訊號(H),經該第一邏輯電路23之邏輯或(OR)運算,使該驅動訊號為高邏輯準位訊號(H)。亦即,當該第一微控制器21於異常狀態時,因不知該第一控制訊號之第一脈波寬度調變訊號為何,故使該第二控制訊號為高邏輯準位訊號(H),使得風扇全速運轉,可解決因該第一微控制器21異常造成風扇無法運轉之散熱不足問題。When the second microcontroller 22 detects that the first microcontroller 21 is in an abnormal state, the second control signal is a high logic level signal (H), and the logical OR operation of the first logic circuit 23 is performed. , the drive signal is a high logic level signal (H). That is, when the first microcontroller 21 is in an abnormal state, the second control signal is a high logic level signal (H) because the first pulse width modulation signal of the first control signal is unknown. The fan is operated at full speed, and the problem of insufficient heat dissipation due to the abnormality of the first microcontroller 21 caused by the fan can be solved.

另外,在其他實施例中,該第一控制訊號係為第一脈波寬度調變訊號,當該第二微控制器22偵測該第一微控制器21於正常運轉狀態時,該第二控制訊號為低邏輯準位訊號(L),使該驅動訊號為第一脈波寬度調變訊號;當第二微控制器22偵測該第一微控制器21於異常狀態時,該第二控制訊號為第二脈波寬度調變訊號,使該驅動訊號為第二脈波寬度調變訊號。In addition, in other embodiments, the first control signal is a first pulse width modulation signal, and when the second microcontroller 22 detects that the first microcontroller 21 is in a normal operation state, the second The control signal is a low logic level signal (L), so that the driving signal is a first pulse width modulation signal; when the second microcontroller 22 detects that the first microcontroller 21 is in an abnormal state, the second The control signal is a second pulse width modulation signal, so that the driving signal is a second pulse width modulation signal.

在該實施例中,當該第一微控制器21於異常狀態時,若該第一微控制器21完全不能動作,不能提供該第一控制訊號,故該第二微控制器22取代該第一微控制器21,具有控制權,並提供該第二控制訊號為第二脈波寬度調變訊號,使得風扇正常運轉,可解決因該第一微控制器21異常造成風扇無法運轉之散熱不足問題。In this embodiment, when the first microcontroller 21 is in an abnormal state, if the first microcontroller 21 is completely inoperable and cannot provide the first control signal, the second microcontroller 22 replaces the first A microcontroller 21 has control and provides the second control signal as a second pulse width modulation signal, so that the fan operates normally, and the heat dissipation of the fan that cannot be operated due to the abnormality of the first microcontroller 21 can be solved. problem.

本發明用於風扇之控制系統20另包括一轉速偵測器26,用以偵測風扇散熱群組30之轉速,並產生至少一轉速訊號至該第二微控制器22,該第二微控制器22傳送該轉速訊號至該第一微控制器21。依據該轉速訊號,該第一微控制器21可調整該第一控制訊號,或該第二微控制器22可調整該第二控制訊號,以控制風扇散熱群組30之轉速於一設定速度。The control system 20 for the fan of the present invention further includes a rotation speed detector 26 for detecting the rotation speed of the fan heat dissipation group 30 and generating at least one rotation speed signal to the second microcontroller 22, the second micro control The device 22 transmits the rotational speed signal to the first microcontroller 21. The first microcontroller 21 can adjust the first control signal according to the speed signal, or the second microcontroller 22 can adjust the second control signal to control the speed of the fan heat dissipation group 30 at a set speed.

本發明用於風扇之控制系統20另包括一第二邏輯電路24及一警示器25,其中該第一微控制器21另提供至少一第一警示訊號至該第二邏輯電路24,該第二微控制器22另提供至少一第二警示訊號至該第二邏輯電路24,該第二邏輯電路24接收該第一警示訊號及該第二警示訊號,進行邏輯運算,以產生至少一致動訊號至該警示器25。The control system 20 for the fan of the present invention further includes a second logic circuit 24 and a warning device 25, wherein the first microcontroller 21 further provides at least one first warning signal to the second logic circuit 24, the second The microcontroller 22 further provides at least one second warning signal to the second logic circuit 24, and the second logic circuit 24 receives the first warning signal and the second warning signal, and performs a logic operation to generate at least the motion signal to The alerter 25.

在本實施例中,該第二邏輯電路24係為邏輯或(OR)電路,當該第一微控制器21或該第二微控制器22其中之一於異常狀態時,該第一警示訊號及該第二警示訊號進行邏輯或(OR)運算,產生該致動訊號以使該警示器25致動。該警示器25可為警示燈或警報器等裝置。In this embodiment, the second logic circuit 24 is a logical OR circuit. When the first microcontroller 21 or the second microcontroller 22 is in an abnormal state, the first warning signal is used. And the second warning signal performs a logical OR operation to generate the actuation signal to activate the alarm 25. The alert 25 can be a device such as a warning light or an alarm.

該第一微控制器21另包括一第一通訊介面211,該第二微控制器22另包括一第二通訊介面221,第一通訊介面211與第二通訊介面221互相通訊連接,用以互相偵測該第一微控制器21及該第二微控制器22之使用狀態。當該第一微控制器21偵測得該第二微控制器22異常時,該第一微控制器21提供該第一警示訊號,使該警示器25動作。當該第二微控制器22偵測得該第一微控制器21異常時,該第二微控制器22提供該第二警示訊號,使該警示器25動作。The first microcontroller 21 further includes a first communication interface 211. The second microcontroller 22 further includes a second communication interface 221. The first communication interface 211 and the second communication interface 221 are mutually connected to each other. The usage states of the first microcontroller 21 and the second microcontroller 22 are detected. When the first microcontroller 21 detects that the second microcontroller 22 is abnormal, the first microcontroller 21 provides the first alert signal to cause the alerter 25 to operate. When the second microcontroller 22 detects that the first microcontroller 21 is abnormal, the second microcontroller 22 provides the second warning signal to activate the alarm 25.

因此,本發明用於風扇之控制系統利用二微控制器,在其中之一微控制器異常時,另一微控制器能經由第一邏輯電路確保風扇繼續運轉,以解決習知控制系統因單一微控制器異常造成風扇無法運轉之散熱不足問題。另外,二微控制器能互相偵測使用狀態,當其中之一微控制器異常時,可使該警示器動作,以進行檢修處理,使該控制系統恢復正常。Therefore, the control system for the fan of the present invention utilizes two microcontrollers, and when one of the microcontrollers is abnormal, the other microcontroller can ensure that the fan continues to operate via the first logic circuit to solve the conventional control system due to a single An abnormality in the microcontroller caused the fan to fail to operate. In addition, the two micro-controllers can mutually detect the state of use. When one of the microcontrollers is abnormal, the alerter can be activated to perform an overhaul process to restore the control system to normal.

上述實施例僅為說明本發明之原理及其功效,並非限制本發明。因此習於此技術之人士對上述實施例進行修改及變化仍不脫本發明之精神。本發明之權利範圍應如後述之申請專利範圍所列。The above embodiments are merely illustrative of the principles and effects of the invention and are not intended to limit the invention. Therefore, those skilled in the art can make modifications and changes to the above embodiments without departing from the spirit of the invention. The scope of the invention should be as set forth in the appended claims.

10...習知用於風扇之控制系統10. . . Conventional control system for fans

11...微控制器11. . . Microcontroller

12...風扇散熱群組12. . . Fan cooling group

20...本發明用於風扇之控制系統20. . . The invention is used for a control system of a fan

21...第一微控制器twenty one. . . First microcontroller

22...第二微控制器twenty two. . . Second microcontroller

23...第一邏輯電路twenty three. . . First logic circuit

24...第二邏輯電路twenty four. . . Second logic circuit

25...警示器25. . . Warning device

26...轉速偵測器26. . . Speed detector

30...風扇散熱群組30. . . Fan cooling group

211...第一通訊介面211. . . First communication interface

221...第二通訊介面221. . . Second communication interface

圖1顯示習知用於風扇之控制系統之電路方塊示意圖;及1 is a block diagram showing a circuit of a conventional control system for a fan; and

圖2顯示本發明用於風扇之控制系統之電路方塊示意圖。Figure 2 is a block diagram showing the circuit of the control system for a fan of the present invention.

20...本發明用於風扇之控制系統20. . . The invention is used for a control system of a fan

21...第一微控制器twenty one. . . First microcontroller

22...第二微控制器twenty two. . . Second microcontroller

23...第一邏輯電路twenty three. . . First logic circuit

24...第二邏輯電路twenty four. . . Second logic circuit

25...警示器25. . . Warning device

26...轉速偵測器26. . . Speed detector

30...風扇散熱群組30. . . Fan cooling group

211...第一通訊介面211. . . First communication interface

221...第二通訊介面221. . . Second communication interface

Claims (8)

一種用於風扇之控制系統,包括:一第一微控制器,用以提供至少一第一控制訊號;一第二微控制器,與該第一微控制器連接,用以偵測該第一微控制器之使用狀態,該第二微控制器提供至少一第二控制訊號;及一第一邏輯電路,接收該第一控制訊號及該第二控制訊號,進行邏輯運算,以產生至少一驅動訊號至風扇;其中二微控制器互相偵測使用狀態。 A control system for a fan, comprising: a first microcontroller for providing at least one first control signal; and a second microcontroller coupled to the first microcontroller for detecting the first The second microcontroller provides at least one second control signal; and a first logic circuit receives the first control signal and the second control signal to perform a logic operation to generate at least one driver Signal to fan; two of the microcontrollers detect each other's usage status. 如請求項1之控制系統,其中該第一邏輯電路係為邏輯或電路。 The control system of claim 1, wherein the first logic circuit is a logic or circuit. 如請求項2之控制系統,其中該第一控制訊號係為第一脈波寬度調變訊號,當該第二微控制器偵測該第一微控制器於正常運轉狀態時,該第二控制訊號為低邏輯準位訊號,使該驅動訊號為第一脈波寬度調變訊號;當該第二微控制器偵測該第一微控制器於異常狀態時,該第二控制訊號為高邏輯準位訊號,使該驅動訊號為高邏輯準位訊號。 The control system of claim 2, wherein the first control signal is a first pulse width modulation signal, and when the second microcontroller detects that the first microcontroller is in a normal operation state, the second control The signal is a low logic level signal, so that the driving signal is a first pulse width modulation signal; when the second microcontroller detects that the first microcontroller is in an abnormal state, the second control signal is high logic The level signal is such that the driving signal is a high logic level signal. 如請求項2之控制系統,其中該第一控制訊號係為第一脈波寬度調變訊號,當該第二微控制器偵測該第一微控制器於正常運轉狀態時,該第二控制訊號為低邏輯準位訊號,使該驅動訊號為第一脈波寬度調變訊號;當第二微控制器偵測該第一微控制器於異常狀態時,該第二控制訊號為第二脈波寬度調變訊號,使該驅動訊號為第二 脈波寬度調變訊號。 The control system of claim 2, wherein the first control signal is a first pulse width modulation signal, and when the second microcontroller detects that the first microcontroller is in a normal operation state, the second control The signal is a low logic level signal, so that the driving signal is a first pulse width modulation signal; when the second microcontroller detects that the first microcontroller is in an abnormal state, the second control signal is a second pulse Wave width modulation signal, making the driving signal second Pulse width modulation signal. 如請求項1之控制系統,另包括一轉速偵測器,用以偵測該風扇之轉速,並產生至少一轉速訊號至該第二微控制器,該第二微控制器傳送該轉速訊號至該第一微控制器。 The control system of claim 1, further comprising a speed detector for detecting the speed of the fan and generating at least one speed signal to the second microcontroller, the second microcontroller transmitting the speed signal to The first microcontroller. 如請求項1之控制系統,另包括一第二邏輯電路及一警示器,其中該第一微控制器另提供至少一第一警示訊號至該第二邏輯電路,該第二微控制器另提供至少一第二警示訊號至該第二邏輯電路,該第二邏輯電路接收該第一警示訊號及該第二警示訊號,進行邏輯運算,以產生至少一致動訊號至該警示器。 The control system of claim 1, further comprising a second logic circuit and an alerter, wherein the first microcontroller further provides at least one first alert signal to the second logic circuit, the second microcontroller further providing The at least one second warning signal is sent to the second logic circuit, and the second logic circuit receives the first warning signal and the second warning signal, and performs a logic operation to generate at least the motion signal to the alarm. 如請求項6之控制系統,其中該第二邏輯電路係為邏輯或電路,當該第一微控制器或該第二微控制器其中之一於異常狀態時,該第一警示訊號及該第二警示訊號進行邏輯或運算,產生該致動訊號以使該警示器致動。 The control system of claim 6, wherein the second logic circuit is a logic or circuit, and when one of the first microcontroller or the second microcontroller is in an abnormal state, the first warning signal and the first The second warning signal is logically ORed to generate the actuation signal to activate the alarm. 如請求項7之控制系統,其中該第一微控制器另包括一第一通訊介面,該第二微控制器另包括一第二通訊介面,第一通訊介面與第二通訊介面通訊連接,用以互相偵測該第一微控制器及該第二微控制器之使用狀態。 The control system of claim 7, wherein the first microcontroller further comprises a first communication interface, the second microcontroller further comprises a second communication interface, wherein the first communication interface is in communication with the second communication interface, The mutual use state of the first microcontroller and the second microcontroller is mutually detected.
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