JPH01107698A - Control circuit for rotational temperature of fan - Google Patents
Control circuit for rotational temperature of fanInfo
- Publication number
- JPH01107698A JPH01107698A JP62264613A JP26461387A JPH01107698A JP H01107698 A JPH01107698 A JP H01107698A JP 62264613 A JP62264613 A JP 62264613A JP 26461387 A JP26461387 A JP 26461387A JP H01107698 A JPH01107698 A JP H01107698A
- Authority
- JP
- Japan
- Prior art keywords
- fan
- thermistor
- temperature
- zener diode
- resistance value
- 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
Links
- 230000007423 decrease Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Landscapes
- Control Of Electric Motors In General (AREA)
- Control Of Temperature (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は電子装置等のファンによる冷却において温度に
よりファンの回転速度を制御するファン回転温度制御回
路に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fan rotation temperature control circuit that controls the rotation speed of a fan according to temperature when cooling an electronic device or the like using a fan.
従来この種の温度によるファン回転速度制御では、温度
の変化に対し回転速度の変化を大きく取ることができな
かった。Conventionally, with this type of temperature-based fan rotation speed control, it has not been possible to make large changes in the rotation speed with respect to changes in temperature.
第２図を参照すると、従来のファン回転温度制御回路は
直流定電圧電源１．電圧により回転速度が変化するファ
ン２．感熱抵抗（サーミスタ）３を有・している。この
感熱抵抗３は、温度が上がると抵抗値が小さくなり、温
度が下がると抵抗値が大きくなる抵抗である。ファン２
に印加される電圧はサーミスタ３と抵抗４の並列抵抗値
によって決定され、この電圧によりファンの回転速度が
決定される。温度の上昇にともない、サーミスタ３の抵
抗値が下降し、ファン２の印加電圧の上昇にともないフ
ァンの回転速度が早くなる。また、温度の下降にともな
いファン２に印加される電圧が低下し回転速度が遅くな
る。温度がさらに低下した場合には、サーミスタ３の抵
抗値が抵抗４に比べ非常に大きくなるためファン２に印
加される電圧は抵抗４によってのみ決定され、ファン２
の最低回転速度が決定される。抵抗４は、低温になって
もファン２の回転が停止しないようにするために存在す
る。サーミスタ３と抵抗４とが並列になっているため、
ファン２の回転速度、すなわちファン２への印加電圧を
決定する抵抗値は温度によりサーミスタ３の抵抗が変化
しても、前記並列の抵抗値の変化は小さくなりファン２
の回転速度の温度に対する変化が少なくなるという欠点
があった。Referring to FIG. 2, the conventional fan rotation temperature control circuit includes a DC constant voltage power source 1. Fan whose rotation speed changes depending on the voltage 2. It has a heat sensitive resistor (thermistor) 3. This heat-sensitive resistor 3 is a resistor whose resistance value decreases as the temperature rises, and whose resistance value increases as the temperature decreases. fan 2
The voltage applied to the fan is determined by the parallel resistance value of the thermistor 3 and resistor 4, and the rotation speed of the fan is determined by this voltage. As the temperature increases, the resistance value of the thermistor 3 decreases, and as the voltage applied to the fan 2 increases, the rotation speed of the fan increases. Further, as the temperature decreases, the voltage applied to the fan 2 decreases and the rotation speed decreases. When the temperature further decreases, the resistance value of the thermistor 3 becomes much larger than that of the resistor 4, so the voltage applied to the fan 2 is determined only by the resistor 4, and the voltage applied to the fan 2 is determined only by the resistor 4.
The minimum rotational speed of is determined. The resistor 4 exists to prevent the rotation of the fan 2 from stopping even if the temperature becomes low. Since thermistor 3 and resistor 4 are in parallel,
The resistance value that determines the rotational speed of the fan 2, that is, the voltage applied to the fan 2, is such that even if the resistance of the thermistor 3 changes due to temperature, the change in the parallel resistance value is small.
The disadvantage is that the rotational speed of the motor changes little with respect to temperature.
本発明の回路はファンの回転速度の対温度変化感度を上
げるため、サーミスタおよびツェナーダイオードの並列
回路と、電圧により回転速度が変化する型のファンとを
、直流電源に対して直列に接続したことを特徴とする。In order to increase the sensitivity of fan rotation speed to temperature changes, the circuit of the present invention connects a parallel circuit of a thermistor and a Zener diode, and a fan whose rotation speed changes depending on voltage, in series with a DC power supply. It is characterized by
次に、本発明について図面を参照して詳細に説明する。 Next, the present invention will be explained in detail with reference to the drawings.
第１図を参照すると、本発明の一実施例は、第２図に示
す従来の回路と同じ直流定電圧電源ｌ。Referring to FIG. 1, one embodiment of the present invention uses the same DC constant voltage power supply l as the conventional circuit shown in FIG.
電圧により回転速度が変化するファン２．および感熱抵
抗（サーミスタ）３を有しており、その他この感熱抵抗
（サーミスタ）３に並列に接続さｈたツェナーダイオー
ド５を備えている。この回路においてファン２に印加さ
ｈる電圧は、サーミスタ３と抵抗４の並列抵抗値によっ
て決定され、この電圧によりファン２の回転速度が決定
される。Fan whose rotation speed changes depending on the voltage 2. and a heat-sensitive resistor (thermistor) 3, and a Zener diode 5 connected in parallel to the heat-sensitive resistor (thermistor) 3. In this circuit, the voltage applied to the fan 2 is determined by the parallel resistance value of the thermistor 3 and resistor 4, and the rotation speed of the fan 2 is determined by this voltage.
しかしながら、サーミスタ３の電圧降下がツェナーダイ
オード５の電圧降下に比べ小さい温度領域においては、
ファン２１の印加電圧はサーミスタ３の抵抗値によって
のみ決定される。すなわち、７７７２０回転速度はサー
ミスタ３の抵抗値のみにより決定されるため、ファン２
の回転速度の温度に対して変化が大きくとれる。また、
低温時におけるファン２の最低回転速度はツェナーダイ
オード５により決定される。However, in a temperature range where the voltage drop across the thermistor 3 is smaller than that across the Zener diode 5,
The voltage applied to the fan 21 is determined only by the resistance value of the thermistor 3. In other words, since the 77720 rotation speed is determined only by the resistance value of thermistor 3, the fan 2
The rotational speed can vary greatly with temperature. Also,
The minimum rotational speed of the fan 2 at low temperatures is determined by the Zener diode 5.
以上説明したように本発明は、サーミスタに並列にゼナ
ーダイオードを接続することにより、低温時におけるフ
ァンの最低回転を保証し、温度に対して、敏感にファン
の回転速度を変化させることができる。As explained above, the present invention guarantees the minimum rotation of the fan at low temperatures by connecting a zener diode in parallel with the thermistor, making it possible to change the rotation speed of the fan sensitively to the temperature. .
第１図は本発明の一実施例を示す図、および第２図は従
来の一例を示す回路図である。
ｌ・・・・・・直流電源、２・・・・・・電圧により回
転速度が変化するファン、３・・・・・・サーミスタ（
感熱抵抗）、４・・・・・・抵抗、５・・・・・・ゼナ
ーダイオード。
代理人 弁理士 内 原 晋
＄２図FIG. 1 is a diagram showing an embodiment of the present invention, and FIG. 2 is a circuit diagram showing a conventional example. 1...DC power supply, 2...Fan whose rotation speed changes depending on the voltage, 3...Thermistor (
heat sensitive resistor), 4... Resistor, 5... Zener diode. Agent Patent Attorney Susumu Uchihara $2
Claims (1)
圧により回転速度が変化する型のファンとを、直流電源
に対し直列に接続したことを特徴とするファン回転温度
制御回路。A fan rotation temperature control circuit characterized in that a parallel circuit of a thermistor and a Zener diode, and a fan whose rotation speed changes depending on voltage are connected in series to a DC power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62264613A JPH01107698A (en) | 1987-10-19 | 1987-10-19 | Control circuit for rotational temperature of fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62264613A JPH01107698A (en) | 1987-10-19 | 1987-10-19 | Control circuit for rotational temperature of fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01107698A true JPH01107698A (en) | 1989-04-25 |
Family
ID=17405757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62264613A Pending JPH01107698A (en) | 1987-10-19 | 1987-10-19 | Control circuit for rotational temperature of fan |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01107698A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007043771A (en) * | 2005-08-01 | 2007-02-15 | Nichicon Corp | Switching power unit |
| US20180180490A1 (en) * | 2015-06-26 | 2018-06-28 | Continental Automotive France | Temperature measuring device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6046752A (en) * | 1983-08-25 | 1985-03-13 | Murata Mfg Co Ltd | Protecting device of motor |
-
1987
- 1987-10-19 JP JP62264613A patent/JPH01107698A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6046752A (en) * | 1983-08-25 | 1985-03-13 | Murata Mfg Co Ltd | Protecting device of motor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007043771A (en) * | 2005-08-01 | 2007-02-15 | Nichicon Corp | Switching power unit |
| US20180180490A1 (en) * | 2015-06-26 | 2018-06-28 | Continental Automotive France | Temperature measuring device |
| US10859446B2 (en) * | 2015-06-26 | 2020-12-08 | Continental Automotive France | Temperature measuring device |
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