JPS58139894U

JPS58139894U - brushless motor

Info

Publication number: JPS58139894U
Application number: JP3768082U
Authority: JP
Inventors: 山科　守
Original assignee: パイオニア株式会社
Priority date: 1982-03-17
Filing date: 1982-03-17
Publication date: 1983-09-20

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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示す断面図、第２図は界磁
マグネットの着磁状態を示す平面図、第３図はプリント
基板に設けられた導体の形状及びホール素子の配置を示
す図、第４図は電機子コイルの成形方法を示す図、第５
図は電機子コイル及び２個のホール素子の位置関係を示
す図、第６図はコイル電流及びトルクの波形図、第７図
は本考案の他の実施例を示す断面図である。主要部分の符号の説明、２，１４・・・・・・軸、３・
・・・・・軸受、＄ａ、　５ｂ・・・・・・ヨーク、５
ａ、　８ｂ・・・・・・界磁マグネット、９・・・・・
・電機子コイル、１２ａ。１２ｂ・・・・・・ホール素子、２１・・・・・・回転
速度検出用磁極、２２・・・・・・導体。Fig. 1 is a sectional view showing an embodiment of the present invention, Fig. 2 is a plan view showing the magnetized state of the field magnet, and Fig. 3 shows the shape of the conductor provided on the printed circuit board and the arrangement of the Hall elements. Figure 4 is a diagram showing the method of forming the armature coil, Figure 5 is a diagram showing the method of forming the armature coil.
The figure shows the positional relationship between the armature coil and two Hall elements, FIG. 6 is a waveform diagram of coil current and torque, and FIG. 7 is a sectional view showing another embodiment of the present invention. Explanation of symbols of main parts, 2, 14... Axis, 3.
...Bearing, $a, 5b...Yoke, 5
a, 8b...field magnet, 9...
- Armature coil, 12a. 12b...Hall element, 21...Magnetic pole for rotational speed detection, 22...Conductor.

Claims

[Scope of utility model registration request]

a rotatable disk-shaped yoke; an air-core disk-shaped stationary armature coil wound entirely along the outer surface of the yoke in a radial direction with a gap between the outer surface and the center thereof; a field magnet that is rotatable integrally with the yoke and supplies magnetic fluxes in opposite directions in the axial direction to planar portions of the armature coil on opposite sides with respect to the yoke; and a field magnet that is rotatable integrally with the yoke; a position detection means for detecting a relative position, and a plurality of rotation speed detection magnetic poles are magnetized on the same plane as the field poles of the field magnet at a pitch sufficiently smaller than the pitch of the field poles. A brushless motor featuring・