JPH02202388A - Rotation speed detector for fan motor - Google Patents
Rotation speed detector for fan motorInfo
- Publication number
- JPH02202388A JPH02202388A JP1020027A JP2002789A JPH02202388A JP H02202388 A JPH02202388 A JP H02202388A JP 1020027 A JP1020027 A JP 1020027A JP 2002789 A JP2002789 A JP 2002789A JP H02202388 A JPH02202388 A JP H02202388A
- Authority
- JP
- Japan
- Prior art keywords
- rotation speed
- fan motor
- motor
- fan
- terminal
- 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
- 238000001514 detection method Methods 0.000 claims description 13
- 230000007423 decrease Effects 0.000 claims description 7
- 230000015556 catabolic process Effects 0.000 abstract 2
- 239000003990 capacitor Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Control Of Electric Motors In General (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、５溝器内部の発熱を放熱するファンモータの
回転数を検出するファンモータ回転数検出装置に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a fan motor rotation speed detection device for detecting the rotation speed of a fan motor that radiates heat generated inside a five-groove device.
従来の技術
近年、電気・凌器は小型化の傾向にあるため、・機器内
部の発熱を放熱するためには、７アンモータを搭載し１
強制的に放熱する方法が多く用いられてきている。しか
し、ファンモータには寿命があシ、その寿命を何らかの
方法で知らせる必要性がある。Conventional technology In recent years, there has been a trend toward miniaturization of electric appliances and equipment, so in order to dissipate the heat generated inside the equipment, it is necessary to install a
Many methods of forcibly dissipating heat have been used. However, fan motors have a limited lifespan, and there is a need to notify them of that lifespan in some way.
従来のファンモータの回転数の検出は、ファンモータが
完全に停止して初めて信号が出力される機能となってい
た。The conventional fan motor rotation speed detection function outputs a signal only after the fan motor has completely stopped.
発明が解決しようとする課題
しかしながら上記従来の構成では、ファンモータが完全
に停止するまでファンモータの回転数が検出できないの
で、ファンモータの回転数が低下し、機器の内部温度が
上昇して１機器が危険な状態になったとしても、その異
常を報知することができないという欠点を有していた。Problems to be Solved by the Invention However, in the above-mentioned conventional configuration, the rotation speed of the fan motor cannot be detected until the fan motor completely stops, so the rotation speed of the fan motor decreases and the internal temperature of the device increases. Even if the equipment is in a dangerous state, it has the disadvantage of not being able to notify you of the abnormality.
本発明は上記従来の課頓を解決するもので、ファンモー
タの回転数を監視し、機器内部の温度上昇が間櫃となる
回転数まで低下した時に、信号を出力するファンモータ
回転数検出装置を提供することを目的とする。The present invention solves the above-mentioned conventional problems, and is a fan motor rotation speed detection device that monitors the rotation speed of the fan motor and outputs a signal when the temperature rise inside the device has decreased to a certain rotation speed. The purpose is to provide
課題を解決するための手段
この目的を達成するために本発明のファンモータ回転数
検出装置は、ファンモータのファンの回転数を検知する
検知回路を設け、前記検知回路はあらかじめ設定した回
転ＲＶｃまで低下すると、信号を出力するという構成を
有している。Means for Solving the Problems In order to achieve this object, the fan motor rotation speed detection device of the present invention is provided with a detection circuit that detects the rotation speed of the fan motor, and the detection circuit detects the rotation speed of the fan up to a preset rotation RVc. It has a configuration that outputs a signal when the voltage decreases.
作用
本発明は上記の構成によって１機器のファンモータの回
転数が機器の内部温度上昇により異常をきたすレベルを
示す回転数にまで低下すると、信号を出力することによ
って、機器の破壊を未然に保護することができる。Effect of the Invention With the above-described configuration, the present invention protects the equipment from destruction by outputting a signal when the rotation speed of the fan motor of one device drops to a level that indicates an abnormality due to an increase in the internal temperature of the device. can do.
実施例
以下本発明の一実施例について、図面を参照しながら説
明する。EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.
第１図は本発明の実施例におけるファンモータ回転数演
出装置の回路図を示すものである。第１図において、１
は電子機器等の機器内部の発熱を放熱するファンモータ
で、このファンモータ１はファンの回転数を出力する。FIG. 1 shows a circuit diagram of a fan motor rotation speed production device according to an embodiment of the present invention. In Figure 1, 1
1 is a fan motor that radiates heat generated inside a device such as an electronic device, and this fan motor 1 outputs the number of rotations of the fan.
２はモノマルチＩＣｌ３はモノマルチＩＣ２のＴ１．Ｔ
２端子に接続された容１０１のコンデンサ、４はモノマ
ルチＩＣ２の入端子と電源ｖＤ、）間に接続された抵抗
値Ｒ１の抵抗、５はモノマルチＩＧ２のＴ２端子と電源
ｖＤＤ間に接続された抵抗値Ｒ２の抵抗で、この抵抗６
の抵抗値Ｒ２とコンデンサ３の容重Ｃ１とで決定される
時定数であらかじめ定められたファンモータ１の回転数
がモノマルチＩＣ２に設定されることになる。2 is a mono-multi IC 13 is a mono-multi IC 2 T1. T
A capacitor with a capacity of 101 is connected to terminal 2, 4 is a resistor with a resistance value R1 connected between the input terminal of monomulti IC2 and the power supply vD, and 5 is connected between the T2 terminal of monomulti IC2 and power supply vDD. This resistor 6 has a resistance value R2.
The rotation speed of the fan motor 1, which is predetermined by the time constant determined by the resistance value R2 of the capacitor 3 and the capacity and weight C1 of the capacitor 3, is set in the monomulti IC 2.
第２図１よ、第１図のム点におけるファンモータの回転
出力波形を示すものである。FIG. 2 1 shows the rotational output waveform of the fan motor at point M in FIG. 1.
以上のように構成された本実施例のファンモータ回転数
検出装置について、以下その動作を説明する。The operation of the fan motor rotation speed detection device of this embodiment configured as described above will be described below.
まず、ファンモータ１が定常状態で回転している場合、
ファンモータ１から出力される回転波形出カバ、モノマ
ルチＩＣ２の入端子に印加される。First, when the fan motor 1 is rotating in a steady state,
The rotational waveform output from the fan motor 1 is applied to the input terminal of the monomulti IC 2.
この入端子には電源ｖＤＤからの電圧が抵抗４を介して
印加されており１回転波形出力は第２図に示すようにな
る。即ち１回転波形出力はファンモータ１のファンの回
・紙数をＮ（ｒｐｍ）とすれば、ファン１回転の時間Ｔ
。がａ ｏ ／ Ｎ （秒〕、最大電圧がＶ。Ｂ、最小
！圧がＶ。Ｌの矩形波となる。また、定常状態では、モ
ノマルチＩＣ２のＱ端子からば、ロウ（ＬＯＷ ）レベ
ルの電圧Ｖ。が出力される。A voltage from a power supply vDD is applied to this input terminal via a resistor 4, and the one-rotation waveform output is as shown in FIG. In other words, the waveform output for one rotation is the time T for one rotation of the fan, where N (rpm) is the number of fan rotations and number of sheets of fan motor 1.
. is ao/N (seconds), the maximum voltage is V.B, and the minimum! pressure is V.L.In the steady state, from the Q terminal of the monomulti IC2, a low level (LOW) level is generated. A voltage V. is output.
次に時間が経過してファンモータ１の回転数が下がり、
抵抗６とコンデンサ３で決定される時定数にもとづいて
、あらかじめ定めた回転数になると、モノマルチＸ０２
ｄフアンモータ１の回転数の低下を険出し、モノマルチ
ＩＣ２のＱ端子からハイレベルの電圧Ｖ。を出力する。Next, as time passes, the rotation speed of fan motor 1 decreases, and
Based on the time constant determined by resistor 6 and capacitor 3, when the predetermined rotation speed is reached, the monomulti X02
d The rotational speed of the fan motor 1 suddenly decreases, and a high level voltage V is generated from the Q terminal of the monomulti IC 2. Output.
以上のように１本実施例によれば、ファンモータの回転
数の下限の限界点をあらかじめ設定することができるモ
ノマルチＩＣの食出手段を設けることによシ、ファンモ
ータの回転数の低下を、ファンモータが完全に停止する
までに事前に検出することができるので、ファンモータ
の回転数が低下し１機器内部の発熱が危険なレベルにな
る時点までにモノマルチェＣ２からの検出出力にもとづ
いて、警告音等で報知することができる。As described above, according to this embodiment, the rotation speed of the fan motor can be reduced by providing a mono-multi-IC output means that can set the lower limit point of the rotation speed of the fan motor in advance. can be detected in advance before the fan motor completely stops, so it can be detected based on the detection output from Monomarche C2 by the time the fan motor rotation speed decreases and the heat generation inside one device reaches a dangerous level. It is possible to notify with a warning sound or the like.
発明の効果
以上のように本発明は、ファンモータの回転数を検知す
る路を設けることにより、機器内部の発熱が危険なレベ
ルになるまでファンの回転数が低下すると、警告音等に
よって知らせることができる優れたファンモータ回転数
検出装置を実現できるものである。Effects of the Invention As described above, the present invention provides a path for detecting the rotation speed of the fan motor, so that when the rotation speed of the fan decreases to a dangerous level when the heat generation inside the device reaches a dangerous level, the present invention can notify the user with a warning sound or the like. This makes it possible to realize an excellent fan motor rotation speed detection device that can perform the following functions.
第１図は本発明の一実施例におけるファンモータ回転数
検出装置の回路図、第２図は第１図のム点における出力
波形図である。
１・・・・・・回転散出力付ファンモータ、２・・・・
・・モノマルチ。FIG. 1 is a circuit diagram of a fan motor rotation speed detection device according to an embodiment of the present invention, and FIG. 2 is an output waveform diagram at point M in FIG. 1...Fan motor with rotating scattering power, 2...
...Mono multi.
Claims (1)
の回転数を検知する検知回路を有し、前記検知回路は、
前記回転数があらかじめ定められた回転数にまで低下す
ると信号を出力するファンモータ回転数検出装置。It has a detection circuit that detects the fan rotation speed based on the fan rotation speed output of the fan motor, and the detection circuit includes:
A fan motor rotation speed detection device that outputs a signal when the rotation speed decreases to a predetermined rotation speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1020027A JPH02202388A (en) | 1989-01-30 | 1989-01-30 | Rotation speed detector for fan motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1020027A JPH02202388A (en) | 1989-01-30 | 1989-01-30 | Rotation speed detector for fan motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02202388A true JPH02202388A (en) | 1990-08-10 |
Family
ID=12015595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1020027A Pending JPH02202388A (en) | 1989-01-30 | 1989-01-30 | Rotation speed detector for fan motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02202388A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8132921B2 (en) | 2007-08-10 | 2012-03-13 | Kabushiki Kaisha Toshiba | Projection display apparatus having a cooling fan and controlling method for projection display apparatus having a cooling fan |
-
1989
- 1989-01-30 JP JP1020027A patent/JPH02202388A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8132921B2 (en) | 2007-08-10 | 2012-03-13 | Kabushiki Kaisha Toshiba | Projection display apparatus having a cooling fan and controlling method for projection display apparatus having a cooling fan |
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