JPH0345080U - - Google Patents
Info
- Publication number
- JPH0345080U JPH0345080U JP10656289U JP10656289U JPH0345080U JP H0345080 U JPH0345080 U JP H0345080U JP 10656289 U JP10656289 U JP 10656289U JP 10656289 U JP10656289 U JP 10656289U JP H0345080 U JPH0345080 U JP H0345080U
- Authority
- JP
- Japan
- Prior art keywords
- small
- rotor
- annular
- magnetic pole
- signal detection
- 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 10
- 239000000758 substrate Substances 0.000 claims description 2
- 230000004907 flux Effects 0.000 claims 1
- 239000000696 magnetic material Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Permanent Magnet Type Synchronous Machine (AREA)
- Brushless Motors (AREA)
Description
第1図は本考案の一実施例を示す正面図、第2
図は第1図中のロータ本体と速度検出機構との位
置関係を示す説明図、第3図は第2図の動作を示
す説明図、第4図ないし第5図は各々環状小磁石
部の他の例を示す説明図、第6図ないし第8図は
従来例を示す説明図である。
1……基板、2……ロータ本体、3……駆動磁
石部、4……回転速度信号形成用の環状小磁石部
、10……速度検出機構、11……速度用の信号
検知部材、12……速度用の信号検出コイル。
Figure 1 is a front view showing one embodiment of the present invention;
The figure is an explanatory diagram showing the positional relationship between the rotor body and the speed detection mechanism in Fig. 1, Fig. 3 is an explanatory diagram showing the operation of Fig. 2, and Figs. 4 and 5 are each annular small magnet part. Explanatory diagrams showing other examples, and FIGS. 6 to 8 are explanatory diagrams showing conventional examples. DESCRIPTION OF SYMBOLS 1...Substrate, 2...Rotor main body, 3...Drive magnet part, 4...Annular small magnet part for forming a rotational speed signal, 10...Speed detection mechanism, 11...Signal detection member for speed, 12 ...Signal detection coil for speed.
Claims (1)
環状小磁石部を有し、この環状小磁石部の内側に
ロータ駆動用の複数の磁石から成る駆動磁石部を
装備し、このロータ用の駆動磁石部に対向して当
該ロータ本体を回転自在に支持する基板側に複数
の駆動コイルを備えて成るブラシレスモータにお
いて、 前記駆動磁石部の一磁極部分の外周囲に位置す
る前記環状小磁石部を複数の小磁石用として複数
に均等分割するとともに、当該各分割された領域
を一つおきに前記内径側に位置する駆動磁石部の
極性部分と同一の極性に着磁し、 この環状小磁極の一つおきに着磁された磁極に
対応して当該ロータの外部に速度検出機構を配設
するとともに、 この速度検出機構を、前記環状小磁石部の着磁
された小磁極に対応して凹凸状の対向面を有し磁
性材により形成された信号検知部材と、この信号
検知部材に検知される磁束のN,Sの変化を電気
信号に変換し外部へ出力する単一の信号検出コイ
ルとにより構成したことを特徴とするブラシレス
モータ。[Claims for Utility Model Registration] A small annular magnet portion for outputting speed signals is provided on the outer periphery of the rotor body, and a drive magnet portion consisting of a plurality of magnets for driving the rotor is provided inside the small annular magnet portion. A brushless motor is equipped with a plurality of drive coils on a substrate side that faces a drive magnet for the rotor and rotatably supports the rotor body. The located annular small magnet part is equally divided into a plurality of parts for a plurality of small magnets, and every other divided area is set to have the same polarity as the polarity of the drive magnet part located on the inner diameter side. A speed detection mechanism is provided outside the rotor corresponding to every other magnetized magnetic pole of the annular small magnetic pole, and this speed detection mechanism is connected to the magnetized magnetic pole of the annular small magnet portion. A signal detection member made of a magnetic material and having an uneven facing surface corresponding to the small magnetic pole, and a signal detection member that converts changes in N and S of magnetic flux detected by this signal detection member into electrical signals and outputs them to the outside. A brushless motor characterized by comprising a single signal detection coil.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10656289U JPH0345080U (en) | 1989-09-11 | 1989-09-11 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10656289U JPH0345080U (en) | 1989-09-11 | 1989-09-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0345080U true JPH0345080U (en) | 1991-04-25 |
Family
ID=31655291
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10656289U Pending JPH0345080U (en) | 1989-09-11 | 1989-09-11 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0345080U (en) |
-
1989
- 1989-09-11 JP JP10656289U patent/JPH0345080U/ja active Pending