JPH0428217Y2 - - Google Patents
Info
- Publication number
- JPH0428217Y2 JPH0428217Y2 JP1983032174U JP3217483U JPH0428217Y2 JP H0428217 Y2 JPH0428217 Y2 JP H0428217Y2 JP 1983032174 U JP1983032174 U JP 1983032174U JP 3217483 U JP3217483 U JP 3217483U JP H0428217 Y2 JPH0428217 Y2 JP H0428217Y2
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- electric motor
- permanent magnet
- outer periphery
- small
- 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.)
- Expired
Links
- 238000004804 winding Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
Landscapes
- Brushless Motors (AREA)
Description
【考案の詳細な説明】
本考案はパルスジエネレータ(以下P.Gと略称
する)付電動機の改良に関するものである。[Detailed Description of the Invention] The present invention relates to an improvement of an electric motor equipped with a pulse generator (hereinafter abbreviated as PG).
第1図aは従来より実施されているP.G付電動
機を示し、この電動機は偏平円環状永久磁石2の
一方の端面に当接した回転子ヨーク1を回転子ハ
ブ3を介して回転子軸4に一体的に固着し、回転
子軸4を軸受6で固定軸受ブラケツト5により回
転自在に支承し、永久磁石2に空隙を介して対向
配設した絶縁板9をこの軸受ブラケツト5に固定
し、且つこの絶縁板9には複数個の固定子巻線8
を配設している。又絶縁板9にはパルス発生巻線
10が設けられ、このパルス発生巻線10が回転
子ヨーク1の外周に設けられたパルス発生用小磁
石11,11′と適宜の空隙を介して対向するよ
うにされている。 FIG. 1a shows a conventional motor with a PG.This motor connects a rotor yoke 1 which is in contact with one end face of a flat annular permanent magnet 2 to a rotor shaft 4 via a rotor hub 3. The rotor shaft 4 is rotatably supported by a fixed bearing bracket 5 through a bearing 6, and an insulating plate 9 disposed opposite to the permanent magnet 2 with a gap is fixed to the bearing bracket 5. Moreover, a plurality of stator windings 8 are mounted on this insulating plate 9.
has been set up. Further, a pulse generating winding 10 is provided on the insulating plate 9, and this pulse generating winding 10 faces small pulse generating magnets 11 and 11' provided on the outer periphery of the rotor yoke 1 with an appropriate gap in between. It's like that.
第1図aに示す従来の電動機は、複数個の固定
子巻線8と対向する永久磁石2の磁束を磁気検出
器(図示せず)で検出し、通電制御装置(図示せ
ず)を介して各固定子巻線8に順次通電すること
によつて永久磁石2を備えた回転子ヨーク1を一
定方向に駆動するものであつて、例えばVTRの
磁気ヘツドを備えたドラムを駆動するドラム用電
動機として利用される。 The conventional electric motor shown in FIG. 1A uses a magnetic detector (not shown) to detect the magnetic flux of a permanent magnet 2 facing a plurality of stator windings 8, The rotor yoke 1 equipped with a permanent magnet 2 is driven in a fixed direction by sequentially energizing each stator winding 8. For example, the rotor yoke 1 is used for driving a drum equipped with a magnetic head of a VTR. Used as an electric motor.
このようなドラム用電動機として利用する場合
には回転子ヨーク1が1/2回転する毎に1個のパ
ルスを発生し、しかもこの発生パルスの極性が第
1図cに示す如く180度毎に極性を反転するもの
であることが必要であり、このためパルス発生用
小磁石11,11′は回転子ヨーク1の外周に軸
に対し対称の位置に且つその極性がN極とS極と
なるように取付けている。 When used as a motor for such a drum, one pulse is generated every 1/2 rotation of the rotor yoke 1, and the polarity of the generated pulse changes every 180 degrees as shown in Figure 1c. It is necessary that the polarity be reversed, and for this reason, the small pulse generating magnets 11 and 11' are located on the outer periphery of the rotor yoke 1 symmetrically with respect to the axis, and their polarities are N and S poles. It is installed like this.
この結果絶縁板9上に設けたパルス発生巻線1
0からは、回転子ヨーク1が回転して上記回転子
ヨーク1の外周に設けた小磁石11,11′に対
向した時にパルスを発生し、しかもその極性が第
1図cに示すように180度毎に正と負となり、回
転子ヨーク1の180度毎の位置が検出される。従
つて、この小磁石11,11′の取付位置と極性
は重要で、特に互いに180度異なる位置でしかも
N極,S極と異極性でなければならない。このた
め従来では小磁石11,11′の極性を判別して
これを1個づつ回転子ヨーク1の外周に接着して
取付けていたが、取付位置と極性を正しくするに
は高度の技術を必要としていた。 As a result, the pulse generating winding 1 provided on the insulating plate 9
0, when the rotor yoke 1 rotates and faces the small magnets 11, 11' provided on the outer periphery of the rotor yoke 1, a pulse is generated, and the polarity is 180 as shown in FIG. It becomes positive and negative for each degree, and the position of the rotor yoke 1 is detected every 180 degrees. Therefore, the mounting positions and polarities of the small magnets 11, 11' are important, and in particular, they must be at positions 180 degrees different from each other and must have different polarities from the north and south poles. For this reason, in the past, the polarities of the small magnets 11 and 11' were determined and each was attached to the outer periphery of the rotor yoke 1 one by one, but advanced technology was required to get the mounting position and polarity correct. It was.
本考案の目的は従来技術に於ける上記の問題を
解決したP.G付電動機を得るにある。 The purpose of the present invention is to obtain a PG-equipped electric motor that solves the above-mentioned problems in the prior art.
本考案の他の目的はP.G用の小磁石を単体とせ
ずリング上に一体に形成し小磁石の取付を容易な
らしめたP.G付電動機を得るにある。 Another object of the present invention is to provide a motor with a PG in which the small magnet for the PG is formed integrally on a ring instead of a single unit, thereby making it easier to attach the small magnet.
本考案のパルスジエネレータ付電動機は、偏平
円環状永久磁石をその一方の端面に当接したヨー
クを回転子軸に固着して成る回転子と、この回転
子に空隙を介して対向配設した複数個の固定子巻
線と、パルス発生巻線と、上記回転子の外周に嵌
合したプラスチツクマグネツト材で構成したリン
グとより成り、このリングにはその外周に180°互
いに離間した位置に突出部が一体に形成されてお
り、この突出部が互いに反対極性に着磁されてい
ることを特徴とする。 The electric motor with a pulse generator of the present invention includes a rotor consisting of a yoke with a flat annular permanent magnet in contact with one end face fixed to the rotor shaft, and a rotor that is disposed opposite to the rotor with an air gap interposed therebetween. It consists of a plurality of stator windings, a pulse generating winding, and a ring made of plastic magnet material fitted around the outer circumference of the rotor. A feature is that the protrusions are integrally formed, and the protrusions are magnetized with opposite polarities.
以下図面によつて本考案の実施例を説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第2図aは本考案P.G付電動機を示すもので、
第1図aと同一部分は同一符号を付しその説明を
省略する。 Figure 2a shows the electric motor with PG according to the present invention.
The same parts as in FIG. 1a are given the same reference numerals, and their explanation will be omitted.
本考案に於てはP.G用の小磁石を単体とせず、
回転子ヨーク1に取り付けた永久磁石2の外周に
嵌合したプラスチツクマグネツト材の薄いリング
20の外周にP.G用の小磁石21,21′を180度
の位置に突出させ一体的に形成せしめる。 In this invention, the small magnet for PG is not used as a single unit,
Small magnets 21 and 21' for PG are integrally formed on the outer periphery of a thin ring 20 of plastic magnet material fitted to the outer periphery of a permanent magnet 2 attached to a rotor yoke 1, protruding at 180 degrees.
本考案P.G付電動機は上記のような構成である
から小磁石21,21′の配設位置は常に型で定
まり、又リング20の小磁石に対応する部分を直
径の方向にN極,S極と着磁すれば必ず交互の極
性に着磁できる。又、このようなリング20は永
久磁石2の外周に嵌合することによつてこれに容
易に一体的に固着せしめることができる。 Since the electric motor with PG according to the present invention has the above-mentioned configuration, the placement positions of the small magnets 21, 21' are always determined by the mold, and the portions of the ring 20 corresponding to the small magnets are diametrically N-pole and S-pole. If you magnetize them, you can always magnetize them with alternating polarities. Moreover, such a ring 20 can be easily and integrally fixed to the outer circumference of the permanent magnet 2 by fitting it thereto.
尚、上記小磁石21,21′を設けたリング2
0は永久磁石2の外周に嵌合する代りに回転子ヨ
ーク1の外周に設けても良いことは勿論である。 In addition, the ring 2 provided with the small magnets 21 and 21'
0 may be provided on the outer periphery of the rotor yoke 1 instead of fitting on the outer periphery of the permanent magnet 2.
第1図aは従来のP.G付電動機の縦断面図、第
1図bはその説明用平面図、第1図cはその発生
パルスの説明図、第2図aは本考案P.G付電動機
の縦断面図、第2図bはそのパルス発生用小磁石
の説明用平面図、第2図cはその縦断面図であ
る。
1……回転子ヨーク、2……永久磁石、3……
回転子ハブ、4……回転子軸、5……軸受ブラケ
ツト、6……軸受、8……固定子巻線、9……絶
縁板、10……パルス発生巻線、11,11′…
…小磁石、20……リング、21,21′……小
磁石。
Figure 1a is a longitudinal cross-sectional view of a conventional electric motor with PG, Figure 1b is an explanatory plan view thereof, Figure 1c is an explanatory diagram of the generated pulses, and Figure 2a is a longitudinal cross-section of the electric motor with PG of the present invention. FIG. 2b is an explanatory plan view of the small pulse generating magnet, and FIG. 2c is a longitudinal sectional view thereof. 1...Rotor yoke, 2...Permanent magnet, 3...
Rotor hub, 4... Rotor shaft, 5... Bearing bracket, 6... Bearing, 8... Stator winding, 9... Insulating plate, 10... Pulse generating winding, 11, 11'...
...Small magnet, 20...Ring, 21, 21'...Small magnet.
Claims (1)
たヨークを回転子軸に固着して成る回転子と、こ
の回転子に空隙を介して対向配設した複数個の固
定子巻線と、パルス発生巻線と、上記回転子の外
周に嵌合したプラスチツクマグネツト材で構成し
たリング上より成り、このリングにはその外周に
180°互いに離間した位置に突出部が一体に形成さ
れており、この突出部が互いに反対極性に着磁さ
れていることを特徴とするパルスジエネレータ付
電動機。 A rotor consisting of a yoke with a flat annular permanent magnet in contact with one end face fixed to the rotor shaft, a plurality of stator windings disposed opposite to this rotor with a gap in between, and a pulse generator. It consists of a generating winding and a ring made of plastic magnet material fitted around the outer periphery of the rotor.
An electric motor with a pulse generator, characterized in that protrusions are integrally formed at positions separated from each other by 180 degrees, and the protrusions are magnetized with opposite polarities.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3217483U JPS59138368U (en) | 1983-03-08 | 1983-03-08 | Electric motor with pulse generator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3217483U JPS59138368U (en) | 1983-03-08 | 1983-03-08 | Electric motor with pulse generator |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS59138368U JPS59138368U (en) | 1984-09-14 |
JPH0428217Y2 true JPH0428217Y2 (en) | 1992-07-08 |
Family
ID=30163007
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3217483U Granted JPS59138368U (en) | 1983-03-08 | 1983-03-08 | Electric motor with pulse generator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59138368U (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57166871A (en) * | 1981-04-03 | 1982-10-14 | Japan Servo Co Ltd | Dc brushless motor |
-
1983
- 1983-03-08 JP JP3217483U patent/JPS59138368U/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57166871A (en) * | 1981-04-03 | 1982-10-14 | Japan Servo Co Ltd | Dc brushless motor |
Also Published As
Publication number | Publication date |
---|---|
JPS59138368U (en) | 1984-09-14 |
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