JPH0279173U - - Google Patents
Info
- Publication number
- JPH0279173U JPH0279173U JP15642988U JP15642988U JPH0279173U JP H0279173 U JPH0279173 U JP H0279173U JP 15642988 U JP15642988 U JP 15642988U JP 15642988 U JP15642988 U JP 15642988U JP H0279173 U JPH0279173 U JP H0279173U
- Authority
- JP
- Japan
- Prior art keywords
- drive magnet
- salient pole
- magnetic poles
- pole teeth
- portion including
- 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
- 230000005405 multipole Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 1
Landscapes
- Brushless Motors (AREA)
Description
第１図は本考案の一実施例を示す縦断面図、第
２図は第１図に用いられる駆動マグネツトの斜視
図、第３図は従来及び本考案の駆動マグネツトの
磁界強度分布を表す図、第４図は従来及び本考案
のトルク波形を示す図、第５図は本考案に用いら
れる駆動マグネツトの他の実施例を示す斜視図、
第６図は本考案に用いられる駆動マグネツトの更
に他の実施例を示す斜視図、第７図は従来のブラ
シレスモータを示す縦断面図、第８図は第７図に
用いられる駆動マグネツトを示す斜視図である。
１……シヤフト、２……ネジ、３……ロータヨ
ーク、５，３５，４５，５５……駆動マグネツト
、７，３７，４７，５７……磁極、９……コア、
９ａ……突極歯、１１……駆動コイル、１３……
回路基板、１５……スペーサ、１７，１９……ボ
ールベアリング、２１……固定側ドラム、２１ａ
……中空部、２１ｂ……段部、２３……回転側ド
ラム、２５……磁気ヘツド、２７……ホール素子
、３３……貫通孔（空間）、４３，５３……凹溝
（空間）。
Fig. 1 is a longitudinal cross-sectional view showing an embodiment of the present invention, Fig. 2 is a perspective view of the drive magnet used in Fig. 1, and Fig. 3 is a diagram showing the magnetic field strength distribution of the conventional drive magnet and the drive magnet of the present invention. , FIG. 4 is a diagram showing torque waveforms of the conventional and the present invention, and FIG. 5 is a perspective view showing another embodiment of the drive magnet used in the present invention.
FIG. 6 is a perspective view showing still another embodiment of the drive magnet used in the present invention, FIG. 7 is a longitudinal cross-sectional view showing a conventional brushless motor, and FIG. 8 shows the drive magnet used in FIG. FIG. 1... Shaft, 2... Screw, 3... Rotor yoke, 5, 35, 45, 55... Drive magnet, 7, 37, 47, 57... Magnetic pole, 9... Core,
9a... Salient pole tooth, 11... Drive coil, 13...
Circuit board, 15... Spacer, 17, 19... Ball bearing, 21... Fixed side drum, 21a
. . . Hollow portion, 21b . . . Step portion, 23 . . . Rotating drum, 25 .
Claims (1)
コアを備えたステータ部と、 隣接する磁極が周方向に交互に異極となるよう
に多極着磁された環状の駆動マグネツトを備えた
ロータ部と、からなり、 前記突極歯の先端部と前記駆動マグネツトの磁
極面とが微小空隙を保持して対向しつつ前記ロー
タ部が回転可能に配置されたブラシレスモータに
おいて、 前記駆動マグネツトの磁極の境界部に空間を設
けたことを特徴とするブラシレスモータ。[Claims for Utility Model Registration] A stator portion including a core having a plurality of salient pole teeth around which a drive coil is wound, and a stator portion that is multipole magnetized so that adjacent magnetic poles are alternately different in the circumferential direction. a rotor portion including an annular drive magnet, the rotor portion being rotatably arranged while the tips of the salient pole teeth and the magnetic pole faces of the drive magnet face each other with a microgap between them. A brushless motor, characterized in that a space is provided at a boundary between magnetic poles of the drive magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15642988U JPH0279173U (en) | 1988-11-30 | 1988-11-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15642988U JPH0279173U (en) | 1988-11-30 | 1988-11-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0279173U true JPH0279173U (en) | 1990-06-18 |
Family
ID=31434962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15642988U Pending JPH0279173U (en) | 1988-11-30 | 1988-11-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0279173U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5734175B2 (en) * | 1978-03-29 | 1982-07-21 | ||
| JPS61262039A (en) * | 1985-05-15 | 1986-11-20 | Seiko Epson Corp | Cylinder type motor |
-
1988
- 1988-11-30 JP JP15642988U patent/JPH0279173U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5734175B2 (en) * | 1978-03-29 | 1982-07-21 | ||
| JPS61262039A (en) * | 1985-05-15 | 1986-11-20 | Seiko Epson Corp | Cylinder type motor |
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