JPH01100477A - Field state measuring device - Google Patents
Field state measuring deviceInfo
- Publication number
- JPH01100477A JPH01100477A JP62257188A JP25718887A JPH01100477A JP H01100477 A JPH01100477 A JP H01100477A JP 62257188 A JP62257188 A JP 62257188A JP 25718887 A JP25718887 A JP 25718887A JP H01100477 A JPH01100477 A JP H01100477A
- Authority
- JP
- Japan
- Prior art keywords
- permanent magnet
- rotor
- signal
- system state
- converter
- 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
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 238000005259 measurement Methods 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 230000005415 magnetization Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Landscapes
- Brushless Motors (AREA)
- Measuring Magnetic Variables (AREA)
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ブラシレス直流モータのロータニ取り付けら
れている永久磁石の界磁状態を計測するｔｊ＆置に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tj & position for measuring the field state of a permanent magnet attached to a rotor of a brushless DC motor.
（従来の技術〕
音響機器、ＶＴ凡などに使用する高性能モータとして、
ブラシレス直流モータが多用されているが、このモータ
の性能を評価する方法とし℃、従来は一般的に回転むら
、起動トルクなどのモータ特性を測定する方法がとられ
ている。(Conventional technology) As a high-performance motor used in audio equipment, VT equipment, etc.
Brushless DC motors are widely used, and the conventional method for evaluating the performance of these motors has been to measure motor characteristics such as rotational unevenness and starting torque.
しかし、近年の製品の著るしい小形、軽量化とともに、
モータの小形化も急速に進み、これに伴なってロータの
イナーシャが小さくなったことから、ロータに取り付け
られている永久１石の界磁状態の七−夕性能に与える影
魯が大きくなってきている。しかしながら、従来は、こ
のロータに取り付けられた永久磁石自体の界磁状態上精
度しく計測することに対して配慮されていなかりた。However, with the remarkable reduction in size and weight of products in recent years,
Motors are rapidly becoming smaller, and as a result, the inertia of the rotor has become smaller, so the influence of the field state of the permanent magnet attached to the rotor on Tanabata performance has become greater. ing. However, conventionally, no consideration has been given to accurate measurement due to the field state of the permanent magnet itself attached to the rotor.
な８．モータの電磁鉄心の界磁状態の計測に関しては、
サーチコイルを用いる方法が特開昭５８−１１６０４５
号公報に開示されている。8. Regarding the measurement of the field state of the motor's electromagnetic core,
A method using a search coil is disclosed in Japanese Patent Application Laid-Open No. 58-116045.
It is disclosed in the publication No.
上記従来技術におい℃、サーチコイルは永久磁石の界磁
と鎖交する磁束の変化量に比例して、誘導電圧が発生す
ることにＬＤ永久磁石の界磁状態を計測するものである
から、ブラシレス直流モータのロータに取り付けられ℃
いる永久磁石の界磁状態を計測する際、このロータを回
転させるために使用する駆動モータの回転むらが、直接
、計測誤差の要因となる。このため、界磁状態を高精度
に計測するためには１回転むらの小さい、高精度の回転
駆動系が必要となる。In the above conventional technology, the search coil measures the field state of the LD permanent magnet by generating an induced voltage in proportion to the amount of change in the magnetic flux interlinking with the field of the permanent magnet. Attached to the rotor of a DC motor ℃
When measuring the field state of a permanent magnet, uneven rotation of the drive motor used to rotate the rotor directly causes measurement errors. Therefore, in order to measure the field state with high accuracy, a highly accurate rotational drive system with small one-rotation unevenness is required.
また、微小な領域の界磁状態管計測する場合。Also, when measuring the field state tube in a minute area.
サーチコイルのサイズを小さくする必要があるが。It is necessary to reduce the size of the search coil.
この時には、検出感度が低下してしまうという問題が生
じる。 ゛
本発明の目的は、上記した間１１に排除し、簡易な装置
構成で、界磁状態を高精度に計測することのできる装置
を提供することにある。At this time, a problem arises in that detection sensitivity decreases. An object of the present invention is to eliminate the above-mentioned problems 11 and provide a device that can measure the field state with high accuracy with a simple device configuration.
上記目的は、被計測体である永久磁石が取り付けられて
いるロータを回転させるための駆動モータと、該ロータ
の回転位置を検出するための位置検出器と、前記ロータ
に取り付けられた永久磁石に対向する位置に配Ｒさｒた
ホール素子、磁気抵抗素子などのセンサと、前記位置検
出器の出力信号に同期して別記磁気センサの出力信号ｔ
ディジタル信号に変換するための変換器と、該変換器の
出力信号を演算するための演算処理部とから測定位ｔＩ
Ｉ−構成することにより達成される。The above purpose is to provide a drive motor for rotating a rotor to which a permanent magnet, which is an object to be measured, is attached, a position detector for detecting the rotational position of the rotor, and a drive motor for rotating a rotor to which a permanent magnet, which is an object to be measured, is attached. Sensors such as Hall elements and magnetoresistive elements arranged in opposing positions, and an output signal t of a separate magnetic sensor in synchronization with the output signal of the position detector.
The measured position tI is obtained from a converter for converting into a digital signal and an arithmetic processing section for calculating the output signal of the converter.
This is achieved by configuring I-.
〔作用Ｊ
駆動モータに工υ、被計測体である永久磁石を敗シ何け
たロータが回転し、該永久磁石に対向して配置された磁
気センサにニジ、該永久磁石の界磁状態が連続的に出力
される。前記ロータに連結さｒ【、た位置検出器は該ロ
ータの所定の回転角の移動毎に、信号を出力する。ディ
ジタル変換器は、前記位置検出器の出力信号に同期し″
Ｃ，削記磁気センサの一出力信号荀ディジタル信号に変
換する。[Effect J] When the drive motor is operated, the rotor that has lost the permanent magnet that is the object to be measured rotates, and the magnetic sensor placed opposite to the permanent magnet is shown, and the field state of the permanent magnet is continuous. is output as follows. A position detector connected to the rotor outputs a signal every time the rotor moves through a predetermined rotation angle. The digital converter is synchronized with the output signal of the position detector.
C. Convert one output signal of the recording magnetic sensor into a digital signal.
以下１本発明の一実施例を第１因により説明する。 An embodiment of the present invention will be explained below based on the first factor.
下部固定台１５に固定さｎた駆動モータ６とロータリエ
ンコーダ５はそれぞれの回転シャフトの先端部にプーリ
７．７′が取り付けられ、プーリ７．７′は溝ベルト８
にニジ連結されておシ、ロータリエンコーダ６は駆動モ
ータ６により駆動される。The drive motor 6 and rotary encoder 5 fixed to the lower fixed base 15 have a pulley 7.7' attached to the tip of each rotating shaft, and the pulley 7.7' is connected to the grooved belt 8.
The rotary encoder 6 is connected to the rotary encoder 6 and is driven by the drive motor 6.
上部固定台１５’には軸受１１が取り付けらｔ″ＣＸシ
、この軸受１１には被計測体である永久磁石１が取り付
けられているロータ１２のシャフト９が挿入され、ロー
タリエン；−ダ６の回転シャフト先端部とプーリ７′に
よって連結されている。さらに上部固定台１３′に２い
てロータ１２に取り付けられている永久磁石１に対向す
る位置に磁気センサであるホール素子２が配設されてい
る。A bearing 11 is attached to the upper fixed base 15', and the shaft 9 of the rotor 12 to which the permanent magnet 1, which is the object to be measured, is attached is inserted into the bearing 11. It is connected to the tip of the rotating shaft of the rotor 12 by a pulley 7'.Furthermore, a Hall element 2, which is a magnetic sensor, is disposed on the upper fixed base 13' at a position facing the permanent magnet 1 attached to the rotor 12. ing.
本−ル累子２の出力信号は、 Ａ／ｌ）変換器４に入力
されてディジタル化され、演算処理部であるコンビ、−
夕５に取り込まれる。また、ロータリエンコーダ３の出
力信号は、Ａ／Ｄ変換器４のコンバートコマンド端子に
入力されている。The output signal of the main circuit converter 2 is input to the A/l) converter 4, where it is digitized.
It will be taken in at 5pm. Further, the output signal of the rotary encoder 3 is input to a conversion command terminal of the A/D converter 4.
第２＠は、ロータリエンコーダ５ｇよびＡ／Ｄ変換器４
の出力信号波形を示したものであシ、ロータリエンコー
ダ５の出力信号１６ヲコンバートして、Ａ／Ｄ変換器４
は変換を開始し、変換時間ｔの経過後に、ディジタル信
号１７と変換終了信号１日ヲ出力する。コンピュータ５
は、変換終了信号１８１Ｃ同期してディジタル信号１７
ヲ取り込むことになる。The second @ is rotary encoder 5g and A/D converter 4
The output signal 16 of the rotary encoder 5 is converted and sent to the A/D converter 4.
starts the conversion, and outputs the digital signal 17 and the conversion end signal 1 day after the conversion time t has elapsed. computer 5
is the digital signal 17 in synchronization with the conversion end signal 181C.
I'm going to take it in.
第３図は、被計測体である永久磁石１０着磁例を示した
ものであυ、Ｓ極１ａとＮ極１ｂが交互に放射状に８極
着磁されている。この永久磁石１を第１因に示した構成
からなる装ｆｉｋ＆ｃ適用した時に検出される信号例ｋ
ｍ４図に示す。FIG. 3 shows an example of the magnetization of the permanent magnet 10, which is an object to be measured, in which S poles 1a and N poles 1b are alternately magnetized radially in eight poles. Signal example k detected when this permanent magnet 1 is applied to a device fik&c having the configuration shown as the first factor
Shown in Figure m4.
この信号波形から、信号のビータ電圧ａＳよび信号ピー
ク間の回転角θを算出することによυ、永久磁石１の界
磁状態を定食的に計測することができる。By calculating the beater voltage aS of the signal and the rotation angle θ between the signal peaks from this signal waveform, the field state of the permanent magnet 1 can be measured in a fixed manner.
なＳ、本実施例Ｋｇいては、磁気センサとし℃ホール素
子を用いたが、磁気抵抗効果素子などの他の磁気センサ
を用いても、同様の効果が得られることは言うまでもな
い。In this embodiment, a °C Hall element was used as the magnetic sensor, but it goes without saying that similar effects can be obtained by using other magnetic sensors such as a magnetoresistive element.
（発明の効果〕
以上詳述したように、本発明に工れば、簡易な構成に＝
９．永久磁石の界磁状ａｔ高精度に計測することが可能
となる。(Effects of the invention) As detailed above, if the present invention is applied, a simple configuration can be achieved.
9. It becomes possible to measure the field state of a permanent magnet with high precision.
第１図は本発明の一実施例の界磁状態測定装置の一部断
面で示した正面図、第２囚は第１図の装置構成［おける
ロータリエンコーダ８よび人／Ｄ変換器の出力信号波形
を示す因、第５囚は被計測体である永久磁石の着磁例を
示す囮、第４因は第５１に示した永久磁石の界磁状態を
第１図の構成の装ａｔ用いて計測した結果を示す図であ
る。
−Ｋｇいて、１・・・永久磁石、２・・・ホール素子。
３・・・ロータリエン；−ダ、４・・・Ａ／Ｄｉ換！、
５・・・コンビ、−タ、６・・・駆動モータ、７．７’
・・・プーリ、８・・・溝付ベルト、９・・・シャフト
、１１・・・軸受、１２・・・ロータ、１５・・・下部
固定台、１３′・・・上部固定台。
第１図
第２図FIG. 1 is a partially sectional front view of a field state measuring device according to an embodiment of the present invention, and the second figure shows the output signals of the rotary encoder 8 and the human/D converter in the device configuration of FIG. 1. The fifth factor that shows the waveform is a decoy that shows an example of magnetization of the permanent magnet that is the object to be measured, and the fourth factor is the magnetic field state of the permanent magnet shown in No. 51 using the device with the configuration shown in Figure 1. It is a figure which shows the measured result. -Kg, 1...Permanent magnet, 2...Hall element. 3...Rotarien;-da, 4...A/Di exchange! ,
5... Combi, -ta, 6... Drive motor, 7.7'
... Pulley, 8... Grooved belt, 9... Shaft, 11... Bearing, 12... Rotor, 15... Lower fixing base, 13'... Upper fixing base. Figure 1 Figure 2
Claims (1)
る永久磁石の界磁状態を計測する装置であって、前記ロ
ータを回転駆動するための駆動モータと、前記ロータの
回転位置を検出するための位置検出器と、前記ロータに
取り付けられた永久磁石に対向する位置に配置された磁
気センサと、前記位置検出器の出力信号に同期して前記
磁気センサの出力信号をディジタル信号に変換するため
の変換器と、前記変換器の出力信号を演算するための演
算処理部とを含むことを特徴とする界磁状態測定装置。1. A device for measuring the field state of a permanent magnet attached to the rotor of a brushless DC motor, which includes a drive motor for rotationally driving the rotor, and a position detector for detecting the rotational position of the rotor. a magnetic sensor disposed at a position facing a permanent magnet attached to the rotor, and a converter for converting the output signal of the magnetic sensor into a digital signal in synchronization with the output signal of the position detector. and a calculation processing unit for calculating an output signal of the converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62257188A JPH01100477A (en) | 1987-10-14 | 1987-10-14 | Field state measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62257188A JPH01100477A (en) | 1987-10-14 | 1987-10-14 | Field state measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01100477A true JPH01100477A (en) | 1989-04-18 |
Family
ID=17302901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62257188A Pending JPH01100477A (en) | 1987-10-14 | 1987-10-14 | Field state measuring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01100477A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787483A (en) * | 2017-02-12 | 2017-05-31 | 湖南天富机电科技有限公司 | A kind of DC brushless motor Hall angle debugging system and adjustment method |
-
1987
- 1987-10-14 JP JP62257188A patent/JPH01100477A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787483A (en) * | 2017-02-12 | 2017-05-31 | 湖南天富机电科技有限公司 | A kind of DC brushless motor Hall angle debugging system and adjustment method |
| CN106787483B (en) * | 2017-02-12 | 2023-05-16 | 湖南天富机电科技有限公司 | Debugging method of Hall angle debugging system of direct-current brushless motor |
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