JPS646776U

JPS646776U -

Info

Publication number: JPS646776U
Application number: JP9998287U
Authority: JP
Priority date: 1987-07-01
Filing date: 1987-07-01
Publication date: 1989-01-13

Description

[Brief explanation of the drawing]

第１図乃至第８図は本考案の一実施例に係り、
第１図はブラシレスモータの平面断面図を示す第
２図中の―矢視断面図、第２図はブラシレス
モータの縦断面を示す第１図中の―矢視断面
図、第３図はステータコアの斜視図、第４図は略
Ｔ字状のコアシートを示す平面図、第５図は略Ｌ
字状コアシートを示す平面図、第６図はロータマ
グネツトとステータコアの突極を示す要部拡大断
面図、第７図および第８図は騒音および振動の特
性図、第９図および第１０図は本考案の他の実施
例に係るステータコアを夫々に示す斜視図である
。１…ブラシレスモータ、１０…ロータ、１２，
１３…ロータマグネツト、２０，２０Ａ，２０Ｂ
…ステータコア、２１…突極、２２，３３，３７
…巻線部、２３ａ，２３ｂ，３４ａ，３４ｂ，３
８ａ…延在部、２６，２７…巻線、３１…略Ｔ字
状コアシート、３５…略Ｌ字状コアシート、ｌｓ
…ステータコアの厚み中心、ｌＭ…マグネツトの
厚み中心、ｔｓ…ステータの厚み、ｔＭ…マグネ
ツトの厚み。 1 to 8 relate to an embodiment of the present invention,
Fig. 1 is a cross-sectional view taken along the - arrow in Fig. 2 showing a planar sectional view of the brushless motor, Fig. 2 is a sectional view taken along the - arrow in Fig. 1 showing a vertical cross-section of the brushless motor, and Fig. 3 is a stator core. 4 is a plan view showing a substantially T-shaped core sheet, and FIG. 5 is a substantially L-shaped core sheet.
FIG. 6 is an enlarged sectional view of main parts showing the salient poles of the rotor magnet and stator core; FIGS. 7 and 8 are noise and vibration characteristic diagrams; FIGS. 9 and 10 The figures are perspective views showing stator cores according to other embodiments of the present invention. 1...Brushless motor, 10...Rotor, 12,
13...Rotor magnet, 20, 20A, 20B
... Stator core, 21 ... Salient pole, 22, 33, 37
...Winding part, 23a, 23b, 34a, 34b, 3
8a... Extension portion, 26, 27... Winding wire, 31... Substantially T-shaped core sheet, 35... Substantially L-shaped core sheet, ls
...center of thickness of stator core, lM...center of thickness of magnet, ts...thickness of stator, tM...thickness of magnet.

Claims

[Claims for Utility Model Registration] A stator core in which a plurality of salient poles around which a winding is wound protrude in the radial direction, and a magnet that is rotatably arranged with respect to the stator core and corresponds to each of the salient poles of the stator core. A brushless motor is provided with a rotor that is magnetized along the circumferential direction, and the stator core is formed in a substantially T-shape having an extending portion extending forward and backward in the rotational direction of the rotor at the tip of the winding portion. a core sheet having a substantially L-shaped salient pole portion having an extension portion extending forward in the rotational direction of the rotor at the tip end of the winding portion; The stator core and the magnet are stacked symmetrically with respect to the center of thickness of the stator core, and the center of thickness of the stator core and the center of thickness of the rotor magnet are aligned on substantially the same plane to form the stator core and the magnet. A brushless motor characterized by the following: