JPS6198179A - Rotating speed detector - Google Patents
Rotating speed detectorInfo
- Publication number
- JPS6198179A JPS6198179A JP59219605A JP21960584A JPS6198179A JP S6198179 A JPS6198179 A JP S6198179A JP 59219605 A JP59219605 A JP 59219605A JP 21960584 A JP21960584 A JP 21960584A JP S6198179 A JPS6198179 A JP S6198179A
- Authority
- JP
- Japan
- Prior art keywords
- motor
- rotating speed
- filter
- rotation speed
- noise
- 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
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
- H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
- H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
- H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
- H02P7/2805—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value
Abstract
Description
【発明の詳細な説明】
童業上の利用分野
本発明は直流モータに外部検出機構を設けることなく簡
単に直流モータの回転数を測定することのできる回転数
検出装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION FIELD OF THE INVENTION The present invention relates to a rotation speed detection device that can easily measure the rotation speed of a DC motor without providing an external detection mechanism to the DC motor.
従来例の構成とその問題点
近年、ホール素子やストロボのような非接触検出方式あ
るいはタコメータのような接触検出方式によって直流モ
ータの回転数を測定する装置が利用されている。Conventional Structures and Problems In recent years, devices have been used that measure the rotational speed of a DC motor using a non-contact detection method such as a Hall element or a strobe, or a contact detection method such as a tachometer.
しかしながら上記の従来の装置の構成では、高額である
だけでなく、直流モータの回転部が露出していなければ
ならないとか９回転数を検出するための外部検出装置を
取りつけなければならないなど、構造的にも複雑になる
という問題点を有していた。However, the configuration of the conventional device described above is not only expensive, but also has structural problems such as the rotating part of the DC motor must be exposed and an external detection device must be installed to detect the number of revolutions. It also had the problem of becoming complicated.
発明の目的
本発明は上記従来の問題を解消するもので、直流モータ
に電源を供給するだけで回転数を検出し測定することの
できる回転数検出装置を提供することを目的とする。OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional problems, and aims to provide a rotation speed detection device that can detect and measure the rotation speed simply by supplying power to a DC motor.
発明の構成
本発明は直流モータと、この直流モータの給電部電極よ
り出力されるノイズ直流成分をカットするコンデンサと
、この直流成分をカットした後のノイズを増幅するアン
プと、このアンプより出力されたノイズを上記直流モー
タの回転数に置換する回路とを備えた回転数検出装置で
あり、直流モータからのノイズを利用して回転数を検出
することにより、特別な外部検出装置を付加することな
＜、シかもモータに手を加えることなく、直流モータの
回転数を測定することができるものである。Structure of the Invention The present invention comprises a DC motor, a capacitor for cutting the noise DC component output from the power supply electrode of the DC motor, an amplifier for amplifying the noise after cutting the DC component, and a capacitor for cutting the noise DC component output from the power supply electrode of the DC motor. This is a rotation speed detection device equipped with a circuit that replaces the noise from the DC motor with the rotation speed of the DC motor.By detecting the rotation speed using the noise from the DC motor, it is possible to add a special external detection device. In addition, it is possible to measure the rotational speed of a DC motor without modifying the motor.
実施例の説明
図は本発明の一実施例を示すものであり、１は電源、２
は直流モータ、３はコンデンサ、４はアンプ、５はフィ
ルター、６はカウンタ、７は２モータに供給する電極で
ある。The explanatory diagram of the embodiment shows one embodiment of the present invention, in which 1 indicates a power supply, 2
is a DC motor, 3 is a capacitor, 4 is an amplifier, 5 is a filter, 6 is a counter, and 7 is an electrode that supplies the two motors.
以上のように構成された本実施例の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 rotation speed detection device of this embodiment configured as described above will be explained below.
ここで、直流モータ２が２本のブラシを有する３極の直
流モータで、２５回転／秒すなわち１６００ｒｐｍで回
転するものと仮定すると、１本のブラシにつき１回転中
に３回、２本のブラシでは１回転中に合計６回、供給電
流が断続されることになる。従って、１分間には１５０
０Ｘ６＝９０００回のパルス性のノイズが発生すること
になる。このノイズをコンデンサ３へに通すと、その直
流成分が除去される。これをアンプ４で増幅し、フィル
ター５に供給する。ここで、直流モータ２が予め定めら
れた回転数（上の例でいえば１６００τｐｍ）になった
かどうかだけを検出する場合には、フィルター５として
、９０ｏＯ回÷６０秒＝１５０、ＯＨ２（７）ところに
急峻なピークをもつ周波数特性のものを、使用すればよ
い。このようにすれば、直流モータ２−の回転数が１５
００ｒｐｍになったときにフィルター５から出力が得ら
れるから、これを検出することによって、直流モータ２
が予め定められた１５００ｒｐｍ になったことを知
ることができる。Here, assuming that the DC motor 2 is a three-pole DC motor with two brushes and rotates at 25 revolutions/second, that is, 1600 rpm, each brush rotates three times during one rotation. In this case, the supply current is interrupted a total of six times during one rotation. Therefore, in 1 minute there are 150
0X6=9000 pulse noises will be generated. When this noise is passed through the capacitor 3, its DC component is removed. This is amplified by amplifier 4 and supplied to filter 5. Here, when only detecting whether or not the DC motor 2 has reached a predetermined rotation speed (1600τpm in the above example), the filter 5 should be 90oO times ÷ 60 seconds = 150, OH2 (7). It is sufficient to use one with frequency characteristics that have steep peaks in some places. In this way, the number of rotations of the DC motor 2- will be 15
Since an output is obtained from the filter 5 when the rpm reaches 00 rpm, by detecting this, the DC motor 2
It can be seen that the speed has reached the predetermined 1500 rpm.
もちろん、このフィルター６の出力をカウンター６に加
えることによって、「１５０ｏｒｐｍ」のような表示を
行なってもよい。Of course, by adding the output of this filter 6 to the counter 6, a display such as "150 orpm" may be made.
一方、直流モータ２の回転数が所定の範囲内の任意の回
転数になったことを検出したいと゛きは、フィルター６
を帯域通過フィルターで構成し、その帯域を通過したフ
ィルター出力をカウンター６に加え、このカウンター６
でフィルター出力に対応する回転数を表示すればよい。On the other hand, if you want to detect that the rotation speed of the DC motor 2 has reached an arbitrary rotation speed within a predetermined range, use the filter 6
consists of a band-pass filter, the filter output that has passed through that band is added to counter 6, and this counter 6
It is sufficient to display the rotation speed corresponding to the filter output.
、発明の効果
以上のように本発明によれば直流モータの給電部電極よ
シノイズを取り出して増幅し、その出力をフィルター等
の回路を通して取出すことにより、簡単に、そして直流
モータ自体に手を加えることなく、安価に直流モータの
回転数を測定することができる。したがって耐粉塵用モ
ータ、耐薬品用モータ耐水用モータ、超小型モータ等の
ように外部検出機構を組み込むことが困難なモータに応
用すれば、きわめて有利である。, Effects of the Invention As described above, according to the present invention, the noise from the power supply electrode of the DC motor is extracted and amplified, and the output is taken out through a circuit such as a filter, thereby easily modifying the DC motor itself. The number of rotations of a DC motor can be measured at low cost. Therefore, it is extremely advantageous to apply the present invention to motors in which it is difficult to incorporate an external detection mechanism, such as dust-resistant motors, chemical-resistant motors, water-resistant motors, ultra-compact motors, and the like.
図は本発明の一実施例における回転数検出装置のブロッ
ク図である。
１・・・・・・電源、２・・・・・・直流モータ、３・
・・・・・コンデンサ、４・・・・・・アンプ、６・・
・・・・フィルター、６・・・・・・カウンター、７・
・・・・・モータの電極。The figure is a block diagram of a rotation speed detection device in an embodiment of the present invention. 1...Power supply, 2...DC motor, 3.
...Capacitor, 4...Amplifier, 6...
...Filter, 6...Counter, 7.
...Motor electrode.
Claims (1)
されるノイズの直流成分をカットするコンデンサと，こ
の直流成分をカットした後のノイズを増幅するアンプと
，このアンプから出力されたノイズを上記直流モータの
回転数に置換する回路とを備えたことを特徴とする回転
数検出装置。A DC motor, a capacitor that cuts the DC component of noise output from the power supply electrode of this DC motor, an amplifier that amplifies the noise after cutting this DC component, and a capacitor that amplifies the noise output from this amplifier into the DC A rotation speed detection device characterized by comprising a circuit that substitutes the rotation speed of a motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59219605A JPS6198179A (en) | 1984-10-19 | 1984-10-19 | Rotating speed detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59219605A JPS6198179A (en) | 1984-10-19 | 1984-10-19 | Rotating speed detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6198179A true JPS6198179A (en) | 1986-05-16 |
Family
ID=16738147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59219605A Pending JPS6198179A (en) | 1984-10-19 | 1984-10-19 | Rotating speed detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6198179A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0339395U (en) * | 1989-08-21 | 1991-04-16 | ||
| JPH03121466U (en) * | 1990-03-23 | 1991-12-12 | ||
| WO1997027666A1 (en) * | 1996-01-24 | 1997-07-31 | Itt Manufacturing Enterprises, Inc. | Circuit for determining the speed of a commutator motor |
-
1984
- 1984-10-19 JP JP59219605A patent/JPS6198179A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0339395U (en) * | 1989-08-21 | 1991-04-16 | ||
| JPH03121466U (en) * | 1990-03-23 | 1991-12-12 | ||
| WO1997027666A1 (en) * | 1996-01-24 | 1997-07-31 | Itt Manufacturing Enterprises, Inc. | Circuit for determining the speed of a commutator motor |
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