JPS58175459U - Rotation speed detection device for DC brushless motor - Google Patents
Rotation speed detection device for DC brushless motorInfo
- Publication number
- JPS58175459U JPS58175459U JP1982073239U JP7323982U JPS58175459U JP S58175459 U JPS58175459 U JP S58175459U JP 1982073239 U JP1982073239 U JP 1982073239U JP 7323982 U JP7323982 U JP 7323982U JP S58175459 U JPS58175459 U JP S58175459U
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- rotation speed
- speed detection
- rotating member
- detection device
- 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
Landscapes
- Transmission And Conversion Of Sensor Element Output (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来例を示す概略平面図、第２図は第１図のＡ
−Ａ線断面図、第３図は本考案の一実施例を示す概略平
面図、第４図及び第５図は第３図のＢ−Ｂ線及びＣ−Ｃ
線断面図である。
主要部分の符号の説明、２・・・・・・ステータヨーク
、４・・・・・田−タヨーク、５・・・・・・ロータマ
グネット、６・・・・・・駆動コイル、？Ａ、７Ｂ、？
ＯＡ、７０Ｂ・・・・・・磁性部材、８，８θ・・・・
・・検出コイル、９．９０ ゛・・・・・・検出マ
グ゛ネット。Figure 1 is a schematic plan view showing a conventional example, and Figure 2 is A of Figure 1.
-A sectional view, FIG. 3 is a schematic plan view showing an embodiment of the present invention, and FIGS. 4 and 5 are BB and C-C lines in FIG. 3.
FIG. Explanation of the symbols of the main parts, 2... Stator yoke, 4... Stator yoke, 5... Rotor magnet, 6... Drive coil, ? A, 7B,?
OA, 70B...Magnetic member, 8,8θ...
...Detection coil, 9.90゛...Detection magnet.
Claims (2)
マグネットに結合した磁性体からなる回転部材と、前記
回転部材の凹凸面と近接対向しか２その対向面に複数の
凹凸を有する磁性部材と、前記磁性部材及び回転部材と
共に磁気回路を形成する検出マグネットと、前記磁性部
材を通る磁束の変化に応じた出力を発生する磁束変化検
出手段とを備えた直流ブラシレスモーフにおける回転数
検出装置であって、前記磁性部材、検出マグネット及び
磁束変化検出手段は、前記ロータマグネットの磁極数を
２ｐ（ｐは自然数）とすると、ロータ中心軸を中心とし
てほぼ（２ｎ−１）π／ｐ（ｎは自然数）の相対位置関
係上受なくとも１対設けられたことを特徴とする直流ブ
ラシレスモーフにおける回転数検出装置。(1) A rotating member made of a magnetic material having a plurality of irregularities arranged in a circular direction and coupled to a rotor magnet, and a magnetic material having a plurality of irregularities on the opposing surface of the rotating member, which is closely opposed to the irregular surface of the rotating member. A rotation speed detection device in a DC brushless morph, comprising a member, a detection magnet that forms a magnetic circuit together with the magnetic member and the rotating member, and a magnetic flux change detection means that generates an output according to a change in magnetic flux passing through the magnetic member. The magnetic member, the detection magnet, and the magnetic flux change detection means have approximately (2n-1)π/p(n is a natural number). A rotation speed detection device for a DC brushless morph, characterized in that at least one pair of rotation speed detection devices are provided.
前記検出マグネットに巻装されたコイルであることを特
徴とする実用新案登録請求の範囲第１項記載の直流ブラ
シレスモータにおける回転数検出装置。(2) Rotation speed detection in a DC brushless motor according to claim 1, wherein the magnetic flux change detection means is a coil wound around the magnetic member lid or the detection magnet. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1982073239U JPS58175459U (en) | 1982-05-19 | 1982-05-19 | Rotation speed detection device for DC brushless motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1982073239U JPS58175459U (en) | 1982-05-19 | 1982-05-19 | Rotation speed detection device for DC brushless motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58175459U true JPS58175459U (en) | 1983-11-24 |
Family
ID=30082755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1982073239U Pending JPS58175459U (en) | 1982-05-19 | 1982-05-19 | Rotation speed detection device for DC brushless motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58175459U (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55139065A (en) * | 1979-04-17 | 1980-10-30 | Matsushita Electric Ind Co Ltd | Magnetic generating set |
| JPS564057A (en) * | 1979-06-22 | 1981-01-16 | Mitsubishi Electric Corp | Speed generator |
| JPS57196158A (en) * | 1981-05-28 | 1982-12-02 | Mitsubishi Electric Corp | Speed detector |
-
1982
- 1982-05-19 JP JP1982073239U patent/JPS58175459U/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55139065A (en) * | 1979-04-17 | 1980-10-30 | Matsushita Electric Ind Co Ltd | Magnetic generating set |
| JPS564057A (en) * | 1979-06-22 | 1981-01-16 | Mitsubishi Electric Corp | Speed generator |
| JPS57196158A (en) * | 1981-05-28 | 1982-12-02 | Mitsubishi Electric Corp | Speed detector |
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