JPH0214258U

JPH0214258U -

Info

Publication number: JPH0214258U
Application number: JP9102488U
Authority: JP
Priority date: 1988-07-11
Filing date: 1988-07-11
Publication date: 1990-01-29

Description

[Brief explanation of drawings]

第１図ａ，ｂは夫々本考案になるブラシレスモ
ータの構造を示す断面図及び平面図、第２図は従
来より実施されているブラシレスモータの断面図
である。１……固定子基板、２……固定子鉄芯、２―１
，２―２……薄板鉄芯、２―３，２―４……磁極
片、２―５……先端部分、３……固定子巻線、４
……固定子ブラケツト、５，５……球軸受、６…
…回転子軸、７……回転子ボス、８……回転子ヨ
ーク、９……永久磁石、１０……チヤツク、１１
……予圧バネ。 1A and 1B are a sectional view and a plan view showing the structure of a brushless motor according to the present invention, respectively, and FIG. 2 is a sectional view of a conventional brushless motor. 1...Stator board, 2...Stator iron core, 2-1
, 2-2... Thin plate iron core, 2-3, 2-4... Magnetic pole piece, 2-5... Tip portion, 3... Stator winding, 4
...Stator bracket, 5, 5...Ball bearing, 6...
...Rotor shaft, 7...Rotor boss, 8...Rotor yoke, 9...Permanent magnet, 10...Chick, 11
...Preload spring.

Claims

[Scope of utility model registration request]

A stator comprising a stator core formed by laminating thin plate iron cores each having a plurality of magnetic poles radially planted around the outer periphery of an annular yoke, a stator winding around which the magnetic poles are wound, and the stator. A rotor having a permanent magnet having a plurality of magnetic poles magnetized in the circumferential direction, which are opposed to each other through an air gap on the outer periphery of the rotor, a ball bearing rotatably supporting the rotor, and a magnetic pole of the permanent magnet is detected. and a magnetic detector provided on the stator to control energization to the stator winding, and the tips of the magnetic poles of the thin plate iron core on the rotor side and the opposite side are opposed to each other at substantially right angles in the axial direction. In a brushless motor in which bent magnetic pole pieces are formed by bending the rotor in the opposite direction, the tips of the magnetic pole pieces of the thin plate iron core on the opposite side of the rotor are further bent to create a gap in the end face of the permanent magnet provided in the rotor. A brushless motor is characterized in that the motors are opposed to each other through the motor.