JPH02299009A - Rotational frequency control system for cooling fan - Google Patents

Rotational frequency control system for cooling fan

Info

Publication number
JPH02299009A
JPH02299009A JP1118652A JP11865289A JPH02299009A JP H02299009 A JPH02299009 A JP H02299009A JP 1118652 A JP1118652 A JP 1118652A JP 11865289 A JP11865289 A JP 11865289A JP H02299009 A JPH02299009 A JP H02299009A
Authority
JP
Japan
Prior art keywords
cooling fan
processor
power
saving
mode
Prior art date
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.)
Pending
Application number
JP1118652A
Other languages
Japanese (ja)
Inventor
Katsuhiro Hiramatsu
平松　克洋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP1118652A priority Critical patent/JPH02299009A/en
Publication of JPH02299009A publication Critical patent/JPH02299009A/en
Pending legal-status Critical Current

Links

Classifications

    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management

Landscapes

  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Power Sources (AREA)
  • Control Of Temperature (AREA)

Abstract

PURPOSE:To simplify the circuit and to reduce the manufacture cost by providing a function which controls the rotational frequency of a cooling fan according to the mode setting state of the power saving mode of a processor. CONSTITUTION:The power-saving function determines the power-saving mode by setting an optional value in a power-saving register 3 and divides the frequency of the operation clock of the processor. The frequency of the operation clock of the processor is divided to reduce a device processing speed and the power consumption of the processor is reduced. Here, a mode decoding part 4 decodes the set value of the power saving register 3 and a voltage control part 5 controls a voltage supplied to the cooling fan 6 according to the result. Consequently, the need for a temperature sensor, a temperature-voltage converting circuit, etc., is eliminated, the circuit is simplified, and the manufacture cost is reduced.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は冷却ファン回転数制御方式に係り、特に冷却フ
ァンの消費電力、騒音等を低減するのに好適な冷却ファ
ン回転数制御方式に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a cooling fan rotation speed control method, and particularly to a cooling fan rotation speed control method suitable for reducing power consumption, noise, etc. of a cooling fan.

〔従来の技術〕[Conventional technology]

従来のこの種の装置は、特開昭６２− ２００１４号公報等に記載のように、温度センサ等によ
りシステムの温度を検出し、その結果をフィードバック
して冷却ファンの回転数を制御していた。Conventional devices of this type, as described in Japanese Patent Application Laid-Open No. 62-20014, detect the temperature of the system using a temperature sensor, etc., and control the rotation speed of the cooling fan by feeding back the results. .

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

上記従来技術は、温度センサ、温度、電圧変換回路等が
必要であり、低価格及び機構の簡単化については配慮が
されていなかった。The above-mentioned conventional technology requires a temperature sensor, a temperature/voltage conversion circuit, etc., and does not give consideration to low cost and simplification of the mechanism.

本発明の目的は低価格で構成が簡単な冷却ファン回転数
制御方式を堤供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a cooling fan rotation speed control system that is inexpensive and simple in construction.

〔課題を解決するための手段〕[Means to solve the problem]

上記目的はプロセッサのパワーセーブモードのモード設
定状況により、冷却ファンの回転数を制御する機能を具
備することにより達成される。The above object is achieved by providing a function of controlling the number of rotations of the cooling fan depending on the setting status of the power save mode of the processor.

〔作用〕[Effect]

プロセッサのパワーセーブ機能を制御するパワーセーブ
レジスタの設定値をデコードし、そのパワーセーブモー
ドの設定状況に合わせて冷却ファンに供給する電圧を変
化させる。これにより、プロセッサのパワーセーブ時の
冷却ファンの消費電力、Ｉｉ音等の低減が達成できる。It decodes the setting value of the power save register that controls the power save function of the processor, and changes the voltage supplied to the cooling fan according to the setting status of the power save mode. As a result, it is possible to reduce power consumption of the cooling fan, noise, etc. when saving power of the processor.

〔実施例〕〔Example〕

以下本発明の一実施例を図により説明する。第１図は本
発明の一実施例を示す。パワーセーブ機能は、パワーセ
ーブレジスタ３に任意の値を設定することによりパワー
セーブモードを決定しプロセッサの動作クロックを分周
する。例えばＥビットを′″１“としＦｌ、ＦＯビット
をそれぞれ１０＃９％１＃とすれば発振器１で生成され
たクロックを基にしてデバイダ２を制御することにより
プロセッサ動作クロックは４分周される。プロセッサの
動作クロックを分周することにより、デバイス処理速度
を下げ、プロセッサの消費電力を低減する。またこれに
よりプロセッサの発熱量が低減される。ここで、モード
デコード部４によりパワーモードレジスタ３の設定値を
デコードし、その結果により電圧制御部５により冷却フ
ァン６に供給する電圧を制御する。例えば上記の様にＥ
ピッ１−を″１′としＦｌ、ＦＯビットをそれぞれ′″
０′、′″１′とした場合、冷却ファンに供給する電圧
を１／２の電圧とする。冷却ファンに供給する電圧を制
御することにより、冷却ファンの回転数を制御する。冷
却ファンに供給する電圧はプロセッサの発熱量に合わせ
てあらかじめ決めておき、見合った電圧を供給するもの
とする。以上の様にして、プロセッサのパワーセーブ時
の冷却ファンの消費電力、騒音等を低減する。An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the invention. The power save function determines a power save mode by setting an arbitrary value in the power save register 3, and divides the operating clock of the processor. For example, if the E bit is set to ``1'' and the Fl and FO bits are each set to 10#9%1#, the processor operating clock is divided into four by controlling the divider 2 based on the clock generated by the oscillator 1. Ru. By dividing the operating clock of the processor, the device processing speed is lowered and the power consumption of the processor is reduced. This also reduces the amount of heat generated by the processor. Here, the setting value of the power mode register 3 is decoded by the mode decoding section 4, and the voltage supplied to the cooling fan 6 is controlled by the voltage control section 5 based on the result. For example, as shown above, E
Set pin 1 to ``1'' and set Fl and FO bits to ``'' respectively.
0', '''1', the voltage supplied to the cooling fan is 1/2 of the voltage. By controlling the voltage supplied to the cooling fan, the rotation speed of the cooling fan is controlled. The voltage to be supplied is determined in advance according to the amount of heat generated by the processor, and the appropriate voltage is supplied.In this way, the power consumption, noise, etc. of the cooling fan during the power saving of the processor are reduced.

〔発明の効果〕〔Effect of the invention〕

本発明によれば、従来装置に設けられていた温度センサ
、温度、電圧変換回路等が不要となり。According to the present invention, there is no need for a temperature sensor, temperature, voltage conversion circuit, etc., which were provided in a conventional device.

回路が簡略化でき、製造価格が安価になる。また、製造
工程をも簡単にすることができるという効果もある。The circuit can be simplified and the manufacturing cost can be reduced. Another advantage is that the manufacturing process can be simplified.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明の一実施例の概略ブロック図である。 １・・発振器、２・・デバイダ、３・・・パワーセーブ
レジスタ、４・・モードデコード部、５・・・電圧制御
部、６・・冷却ファン。FIG. 1 is a schematic block diagram of one embodiment of the present invention. 1. Oscillator, 2. Divider, 3. Power save register, 4. Mode decoding section, 5. Voltage control section, 6. Cooling fan.

Claims (1)

【特許請求の範囲】[Claims] １、冷却ファンを使用するシステムにおいて、プロセッ
サのパワーセーブモードのモード設定状況により、冷却
ファンの回転数を変化させる機能を具備したことを特徴
とする冷却ファン回転数制御方式。1. A cooling fan rotation speed control method in a system using a cooling fan, which is characterized by having a function of changing the rotation speed of the cooling fan depending on the setting status of a power save mode of a processor.
JP1118652A 1989-05-15 1989-05-15 Rotational frequency control system for cooling fan Pending JPH02299009A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1118652A JPH02299009A (en) 1989-05-15 1989-05-15 Rotational frequency control system for cooling fan

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1118652A JPH02299009A (en) 1989-05-15 1989-05-15 Rotational frequency control system for cooling fan

Publications (1)

Publication Number Publication Date
JPH02299009A true JPH02299009A (en) 1990-12-11

Family

ID=14741865

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1118652A Pending JPH02299009A (en) 1989-05-15 1989-05-15 Rotational frequency control system for cooling fan

Country Status (1)

Country Link
JP (1) JPH02299009A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1165713A (en) * 1997-08-19 1999-03-09 Nec Gumma Ltd Noise reduction system for cooling fan in computer device
US6014611A (en) * 1995-05-30 2000-01-11 Kabushiki Kaisha Toshiba Cooling mode switching system for CPU
US6414843B1 (en) 1999-08-18 2002-07-02 Nec Corporation Cooling system for a computer apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6014611A (en) * 1995-05-30 2000-01-11 Kabushiki Kaisha Toshiba Cooling mode switching system for CPU
US6243656B1 (en) 1995-05-30 2001-06-05 Kabushiki Kaisha Toshiba Cooling mode switching system for CPU
JPH1165713A (en) * 1997-08-19 1999-03-09 Nec Gumma Ltd Noise reduction system for cooling fan in computer device
US6414843B1 (en) 1999-08-18 2002-07-02 Nec Corporation Cooling system for a computer apparatus

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