200903983 九、發明說明： 【發明所屬之技術領域】 本發明係關於電腦風扇控制電路及電腦風扇控制方法。 【先前技術】 隨著電腦技術之飛速發展，電腦系統通常要進行大量之 運算處理，任務繁忙時所產生之熱量也逐漸增加，單憑散熱 孔和散熱片已無法解決散熱問題，在主動散熱設備上，性價 比較高之風冷技術係電腦系統最常採用之散熱方式，然而風 扇雖然經濟實用，卻也存在很多缺陷：隨著轉速之增加，風 扇在高速運轉中產生之噪音也逐漸增大；長時間之高速運 轉，不但會縮短風扇使用壽命，而且風扇本身也會產生很大 孰量。 如果風扇能在系統繁忙時高速運轉，在系統運轉平缓時 降低轉速甚至停止，就可以得到最合理之使用，不但提高了 風扇之使用壽命，而且能減少不必要之熱量產生。習知一種 智能風扇（Smart Fan)技術係為實現風扇之合理使用而研 發，它利用 Intel 之脈寬調變（Pulse Width Modulation，PWM) 規範，根據輸入輸出控制晶片（Super I/O，SIO)控制PWM 之任務週期來控制風扇之轉速。由於PWM變化之依據係中 央處理器内部之二極體讀取之溫度資料，其精確程度超過熱 敏電阻，所以依據PWM之脈衝寬度之任務週期調整風扇轉 速，其控制精度也很高。 透過Smart Fan技術，用戶可以在基本輸入輸出系統 (Basic Input Output System，BIOS )中自主設置 CPU 和主機 200903983 ^之溫度限制’當風扇透過PWM脈衝判斷溫度 制二自動運轉，並可根據所產生之熱量大小調控轉速; 相反，*溫度未超過設定之限制，風扇則會適當休息。 准’ §知之風扇中只有4Pin風扇可以透過pwM實現 :Fan功能1 3Pin風扇由於沒有對應法 收PWM訊號，因此3pin ，去接 來控制轉速。 収:其玉作電愿大小 二：市场上支持Smari Fan之主機板紛紜蕪雜 ::個共同：缺陷’只能支持咖或者他風扇中之 種這樣對各戶而言，對風扃夕，阳遮认 對於“ 他們帶來不便，同樣 連接；之·:摆二！ 板對風扇類型之局限性，對風扇 果不同要求，增加τ元件採購難度。如 π和4Pln風扇所需控制線路集成，使之 夠自動分辨風扇類型並對1轉 、反月b 題將不再發生。 I心速進订控制，那麼諸如此類問 【發明内容】 、鑒於以上内谷’有必要提供一種電腦風扇控制方法，以 刀辨風扇類型，並根據分辨結果選擇不同之控制方式 性提供不同類型風扇之轉逮控制功能。 ；^擇 同型=扇it種電腦風扇控制電路，可選擇性控制不 -iijm風扇控制方法，包括··透過—轉速計數器測量 風扇之轉速；改變傳輸到該風扇之里 週期；透過該轉读外齡。肌見5周芰矾唬之任務 、11為，則董脈寬調變訊號任務週期改變後 200903983 该風扇之轉逮；比較脈寬調變訊 、 轉速，若轉速發生改變則該風扇：=週期改變前後風扇之 生改變則該風扇為第二類風扇；^風扇’若轉速未發 :過二輸入輸出控制晶片控制脈寬調：為第-類風扇，則 工制该風扇之轉速；和若該風扇°—欠汛號之任務週期來 扇控制電路調整傳輸到風扇之電—類風扇，則透過—風 —種電腦風扇控制電路=小來控制風扇轉速。 第:和第三端，其第1接收-Ur?括第一、 弟一控制訊號，第三端依次透過—卡〜弟一端接收 地；一運算放大器，包括—同向輪人:刀讓及積分電容接 輸出端，其同向輸入端透過—分麼電阻接：反向輸入端及-接於該積分電阻和積分電容之間，’反向輸入端連 一電源連接；-電流控制器，包括第積输與-第 連接，第另 連接，第二端與一第二電源 乐一知透過另—分壓電阻盥 端連接，該第三端輸出—風扇控制‘ '大器之同向輸入 該電流控制H第―端之輪㈣.和Υ錢扇控制訊號由 第-控制訊號及該風扇控制二卜輪出端，分別接收該 锋要風扇控制方法能夠分辨風扇類型，並根據分別 、”。動選擇控制方式，可選擇性提供不同類型風扇之轉速 上述風扇控制電路集成了不同型號風扇之轉速控 1私路，可根據風扇_合適之線路對風扇 制。 【實施方式】 200903983 參考圖1，本發明電腦風扇控制方法 括·步.驟1，透過-轉逮計數 旦 x 方式包 量結果發送到—基本輸入輪出；統：進:_扇:轉逮，並將測 過一輪入輸出控制晶片改變傳輸 Τσ己、.a，步驟2，透 號之任務週期，使其降低、；扇之一脈寬調變訊 =脈寬調變訊號任務週期犧該風扇1=轉速計數器 釔果發送到基本輸入輪出系統；+ τν，亚將測量 比齡脈宫$ μ ^ v ~ 4 ’基本輸入輪中糸纪 見调线號任務週期改變前後風扇 =糸統 風扇轉速由脈寬調變訊號任務週期控制，@ 3p於咖 此功能，因此若轉@ln風扇沒有 节風戶A 4P. 詞變訊號任務㈣降低-半則 减扇為4Pln風扇，若轉速未發生 ^丰則 扇；步驟5，若該風扇為4pin 、為讯n風 晶片控制脈寬調變訊號之任務週期來控控制 傳輸到風扇之◎大小來控風扇控制電路調整 再^圖2 ’本發明風扇控制電路之 、-運算放大器電流控制器Si 輸“F。該電子開關Q1包括第 弟：端接收-第-控制訊號GPI〇,第二端接欠：疒制 訊號PWM，第：端依-大读、 安收弟一控制200903983 IX. Description of the Invention: [Technical Field of the Invention] The present invention relates to a computer fan control circuit and a computer fan control method. [Prior Art] With the rapid development of computer technology, computer systems usually have a large amount of computing processing, and the heat generated during busy tasks is gradually increasing. The heat dissipation holes and heat sinks alone cannot solve the heat dissipation problem. On the other hand, the air-cooling technology with higher cost performance is the most commonly used heat dissipation method for computer systems. However, although the fan is economical and practical, it also has many defects: as the speed increases, the noise generated by the fan during high-speed operation gradually increases; Long-term high-speed operation will not only shorten the life of the fan, but also cause a large amount of fan itself. If the fan can run at high speed when the system is busy, when the system runs smoothly, reduce the speed or even stop, you can get the most reasonable use, which not only improves the service life of the fan, but also reduces unnecessary heat generation. A smart fan technology is developed for the rational use of fans. It uses Intel's Pulse Width Modulation (PWM) specification to control the chip according to the input and output (Super I/O, SIO). Control the duty cycle of the PWM to control the speed of the fan. Since the PWM change is based on the temperature data of the diode reading inside the central processor, the accuracy exceeds the thermistor, so the fan speed is adjusted according to the duty cycle of the PWM pulse width, and the control precision is also high. Through Smart Fan technology, users can set the CPU and host 200903983's temperature limit independently in the Basic Input Output System (BIOS). When the fan passes the PWM pulse to judge the temperature system, the automatic operation can be performed according to the generated The heat regulates the speed; on the contrary, if the temperature does not exceed the set limit, the fan will rest properly. Only 4Pin fans in the fan can be realized by pwM: Fan function 1 3Pin fan does not have a corresponding PWM signal, so 3pin is connected to control the speed. Received: its jade for the power of the size 2: the market support Smari Fan's motherboard is noisy:: a common: defect 'can only support the coffee or his fan in the kind of such a pair of households, on the wind, yang, yang Covering for "they are inconvenient, the same connection; the: posed two! The limitations of the board-to-fan type, different requirements for the fan, increase the difficulty of purchasing τ components. For example, the control line integration required for π and 4Pln fans makes It is enough to automatically distinguish the fan type and will not happen again for 1 turn, reverse month b. I heart rate control, then ask [invention], in view of the above, it is necessary to provide a computer fan control method, The knife discriminates the fan type, and selects different control modes according to the resolution result to provide different types of fan transfer control functions. The same type = fan type computer fan control circuit can selectively control the non-iijm fan control method, including ··Measure the speed of the fan through the speed counter; change the period of transmission to the fan; through the transfer to the external age. The muscle sees the task of 5 weeks, 11 is, Dong After the change of the wide-change signal task period is changed, the transmission of the fan is changed. The fan is changed. If the speed changes, the fan: = the fan is changed to the second type before and after the change of the cycle; Fan 'If the speed is not sent: the two input and output control chip control pulse width adjustment: for the first type of fan, the speed of the fan is made; and if the fan ° - under the task period of the fan to adjust the transmission of the fan control circuit To the fan-type fan, the fan speed is controlled by the wind-type computer fan control circuit = small. The first and third ends, the first receiving -Ur includes the first, the younger one control signal, the third The terminal passes through the card-and-one-side receiving end; an operational amplifier, including the same-directional wheel: the knife and the integrating capacitor are connected to the output terminal, and the same-direction input terminal is transmitted through the -to-minus resistor: the reverse input terminal and the - Between the integral resistor and the integral capacitor, the 'inverting input is connected to a power supply; the current controller includes a first output and a third connection, and the second connection is connected to the second power supply. Another - voltage divider resistor Connection, the third end output-fan control 'the same direction of the main input of the current control H the first end of the wheel (four). And the money fan control signal by the first control signal and the fan control the second wheel end, Receiving the front fan control method separately can distinguish the fan type, and according to respectively, ". The dynamic selection control mode can selectively provide the speed of different types of fans. The above fan control circuit integrates the speed control of different types of fans, and can be used according to the fan_suitable line. [Embodiment] 200903983 Referring to FIG. 1, the computer fan control method of the present invention includes the steps of step 1. The transmission result is transmitted to the basic input by the transmission-transfer count method. The system input: _fan: transfer And will measure a round-in output control chip to change the transmission Τ σ, .a, step 2, the task period of the pass-through number, to reduce it; one of the fan pulse width modulation = pulse width modulation signal task cycle Fan 1 = speed counter effect is sent to the basic input wheeling system; + τν, the sub-measure will measure the age of the pulse $ μ ^ v ~ 4 'Basic input wheel in the 糸 见 调 line number task cycle change before and after the fan = 糸The fan speed is controlled by the pulse width modulation signal task cycle, @3p is in this function, so if the @ln fan does not have the wind-proof A 4P. Word change signal task (four) lower - half the fan is 4Pln fan, if the speed is not The occurrence of ^Feng is the fan; Step 5, if the fan is 4pin, the task cycle of controlling the pulse width modulation signal for the n-wind chip to control the transmission to the fan ◎ size to control the fan control circuit to adjust again ^ Figure 2 Invented fan control circuit The current controller outputs Si "F. The first electronic switch Q1 brother comprising: receiving end - of - GPI〇 control signal, a second end less: the PWM signal epileptic system, a first: end by - reading a large, safe closing control younger brother
接地……1 積分電阻R1及積分電容C 接该運鼻放大器U包括-同向輪入端+、一反向輸入端_ 端，其同向輸入端+透過-分壓電阻R2接地，反向 積分電阻R1斑-^雷㈣接積刀之間，並透過該 〃、5V電源連接；該電流控制器Q2包括第一、 200903983 第二和第三端，其第—山、 •器U之輪出端連接端气過-限流電阻R3與該運算放大 過另一分壓電阻r4 端/、 12v電源連接，第三端透 接，該第三端輪出—風戶該：算放大器u之同向輸入端+連 控制訊號PWM及,π ^制讯5虎’該輪出端F接收該第二 接器連接。其t二控制訊號，該輸出端F與—風扇連 之第四引腳，該控制訊號PWM對應該風扇連接器 腳。 X羽卫制矾號對應該風扇連接器之第二引 在本較佳實施方士 MOSFET，其第—、一三該電子開關Q1為一 N通道 該電流控制哭Q2 / —和弟三端分別為閘極、源極和汲極； 分別為趣二 P電晶體，其第-、第二和第三端 入輸出;統產該第一控制訊號_由基本輸 片產生。此外，二 號由輸人輸出控制晶 過-上拉”且血:;開關Q1之第一端和第二端還分別透 上拉％阻與該5V電源連接。 電腦開機後’基本輸入輸 —控制訊號GPl〇 AL 士 见屯十馮唬即该弟 同時基本於入私山 時電子開M Q1呈截止狀態， . 月』⑥系統會控制輸入輸出控制晶片笋Vg] =二為：之第二控制訊號。WM，提：風= ik後’基本輪人輸出系統控制該輸 :個任務週期為50%之第二控制訊號PWM，基 糸統會將此時之風扇轉速資料存儲到另一個寄;本/;= 10 200903983 在1=風扇上其第4Pin為脈寬調變訊號控制端’所以該第 明顯之變化’會變成二::二’：扇之轉速會發生 於其不存在第四引腳，則祀本 、於3Pin風扇，由 PWA/r 則根本热法接收到該第二控制訊號 ==^之轉速不會有明顯之變化，即轉速基本上維 資料了 土本輸人輸出系統會把兩個寄存器前後記錄之 貝科進订對比，如果後—資料大約為前—資料之 定此時連接之風扇類型為41)沁風 、 判定此時連接之風扇類型為3ριη風扇。兩貝科大致相同則 即會= 定所用風扇之類型為 電子_=一控::號;電平訊號，使該 ===_接_對應之第二控制訊號_ 期，：此改自動改變第二控制訊號PWM之任務週 以此改支風扇之轉速，實現SmariFan ,Grounding...1 Integral resistor R1 and integrating capacitor C are connected to the nose amplifier U including - the same direction input terminal +, an inverting input terminal _ terminal, and its non-inverting input terminal + transmission-divider resistor R2 is grounded, reversed The integral resistor R1 spot-^Ray (4) is connected between the knives and connected through the 〃, 5V power supply; the current controller Q2 includes the first, 200903983 second and third ends, and the first - mountain, the U wheel The outlet end of the gas-current limiting resistor R3 and the operation is amplified by another voltage dividing resistor r4 terminal /, 12v power supply connection, the third end is connected, the third end wheel out - the wind account: the amplifier u The same input + the control signal PWM and the π ^ system 5 tiger 'the round F receives the second connector connection. The second control signal is connected to the fourth pin of the fan, and the control signal PWM corresponds to the fan connector pin. X Yuwei system nickname corresponds to the second connector of the fan connector in the preferred implementation of the square MOSFET, the first, the third electronic switch Q1 is an N channel, the current control cry Q2 / - and the three ends of the brother The gate, the source and the drain are respectively; the second, second and third terminals are respectively input and output; the first control signal is generated by the basic film. In addition, the second is controlled by the output of the input crystal-up pull-up and blood: the first end and the second end of the switch Q1 are also connected to the 5V power supply through the pull-up % resistance. The basic input and output after the computer is turned on. Control signal GPl〇AL 士见屯十冯唬 The brother is basically in the private mountain when the electronic opening M Q1 is cut off, . Month 6 system will control the input and output control wafer shoots Vg] = second: second Control signal. WM, mention: wind = ik 'basic wheel output system control the input: a second control signal PWM with a task cycle of 50%, the base will store the fan speed data at this time to another ;本/;= 10 200903983 On the 1=fan, its 4Pin is the pulse width modulation signal control terminal 'so the obvious change 'will become two:: two': the fan speed will occur in its absence of the fourth Pin, then transcript, in 3Pin fan, by PWA / r then the basic thermal signal received the second control signal == ^ the speed will not have a significant change, that is, the speed is basically the data of the native input output The system will compare the two registers before and after the recording of the Beca, if after - the data is large For the front-data setting, the fan type connected at this time is 41) hurricane, and it is determined that the fan type connected at this time is a 3ριη fan. If the two Beca are roughly the same, then the type of the fan used is determined to be electronic _= one control: : No.; level signal, so that the ===_ corresponding to the second control signal _ period,: this change automatically changes the second control signal PWM task week to change the speed of the fan to achieve SmariFan,
風寬調變訊號控制線路，二不再贅J 電平^ κ基本輪入輸出系統發出高 千Λ幼該弟-控制訊號Gpi〇為高電平Wind width modulation signal control line, two no longer 赘 J level ^ κ basic wheel input and output system emits high thousand 该 younger brother - control signal Gpi 〇 high
Qi導通’該第二控制訊號Pw ’电幵1 透過積分電阻R1及積分電容^=该電子« Q1，再 之數位訊號轉換為電壓連續 ： 將離政 由運算放大器U將訊號放大，.輯 流之變化，改變電流控_ 心作,.、、占攸而控制集極之輸出電壓，以此改變3Pin 11 200903983 風扇之轉逮，實現Smart Fan功能。 綜上所述，本發明符合發明專利要件，爰依法提出專利 申請。惟，以上所述者僅為本發明之較佳實施例，舉 本案技蟄之人士，在麦依本發明精抽 …、’心 料㈣相作之I效修飾或變 化白應涵盍於以下之申請專利範圍内。 【圖式簡單說明】 圖1係本發明電腦風扇 控制方法較佳實施方式之流程 圆 ° 圖2本發明電腦風扇控制電 【主要元件符號說明】 路較佳實施方式之電路圖。 電子開關 電流控制器 苐一控制訊號 積分電阻 分壓電阻 Q1 Q2 GPI〇 R1 R2、 運算放大器 U 輪出端 F 第二控制訊號 PWM 積分電容 C 限流電阻 R3 12Qi conducts 'the second control signal Pw 'Electrical 1 through the integral resistor R1 and the integral capacitor ^ = the electron « Q1, and then the digital signal is converted to voltage continuous: the signal will be amplified by the operational amplifier U, the stream The change, change the current control _ heart,.,, occupy the output voltage of the collector, and change the 3Pin 11 200903983 fan to achieve the Smart Fan function. In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and the person skilled in the art, in the invention of the invention according to the invention, the "Improvement of the "Improvement" or the change of the white application should be applied to the following application. Within the scope of the patent. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flow chart of a preferred embodiment of a computer fan control method according to the present invention. FIG. 2 shows a computer fan control system of the present invention. [Main component symbol description] A circuit diagram of a preferred embodiment of the circuit. Electronic Switch Current Controller One Control Signal Integral Resistor Divider Resistor Q1 Q2 GPI〇 R1 R2, Operational Amplifier U Outlet F Second Control Signal PWM Integral Capacitor C Current Limiting R3 12