JPS6062880U

JPS6062880U - 2-phase small DC brushless motor with 6 poles, 4 coils, and 1 position sensing element

Info

Publication number: JPS6062880U
Application number: JP15425783U
Authority: JP
Inventors: 平野　紀光; 小川　昌貴
Original assignee: 高橋　義照
Priority date: 1983-10-04
Filing date: 1983-10-04
Publication date: 1985-05-02

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図は従来の２極の界磁マグネット、３突極、３コイ
ルを有する３相小型直流ブラシレスモータの縦断面図、
第２図は第１図の固定子鉄心の斜視図、第３図は第１図
の２極の界磁マグネットの斜視図、第４図は従来の２極
の界磁マグネット、６突極、６コイルを有する３相小型
直流ブラシレスモータにおける界磁マグネットと固定子
鉄心との状態を示す平面図、第５図は従来の４極の界磁
マグネット、４突極、４コイルを有する２相の小型直流
ブラシレスモータの横断面図、第６図及び第７図は他の
従来における４コイルを有する２相の小型直流ブラシレ
スモータの説明図、第８図は本考案の一実施例を示す６
極の界磁マグネット、４突極、４コイル、位置検知素子
１個を有する２相の小型直流ブラシレスモータの縦断面
図、第９図は第８図における界磁マグネットと固定子鉄
心との関係を示す説明図、第１０図は界磁マグネットと
駆動コイル群との展開図である。１・・・３相小型直流ブラシレスモータ、２・・・３突
極の固定子鉄心、３・・・２極の界磁マグネット、４・
・・固定台座、５・・・Ｔ字形突極片、６・・・回転軸
挿入孔、７・・・駆動コイル、訃・・コイル巻き付は部
、９・・・外周部、１０．１１・・・軸受、１２・・・
軸受支持部材、１３・・・回転軸、１４・・・カップ形
ロータヨーク、１５・・・位置検知素子、１６・・・プ
リント基板、１７・・・突極片、１８・・・４極の界磁
マグネット、４突極、４コイルを有する２相の小型直流
ブラシレスモータ、１９・・・界磁マグネット、２０・
・・ロータヨーク、２１・・・固定子鉄心、２２・・・
突極、２３・・・駆動コイル、２４・・・ホールＩＣ，
２５・・・固定子鉄心、２６・・・主突極、２７・・・
補助突極、２８・・・駆動コイル、２９・・・界磁マグ
ネット、３０・・・２相小型直流ブラシレスモータ、３
１・・・界磁マグネット、３１ａ・・・駆動用磁極、３
１ｂ・・・補助磁極、３２・・・固定子鉄心、３３・・
・主突極、３４・・・補助突極、３５・・・駆動コイル
、３６・・・６極の界磁マグネット、４突極、４コイル
を有する２相の小型直流ブラシレスモータ、３７・・・
偏平固定側カップ体、３８・・・固定子鉄心、３９・・
・固定子鉄心支持体、４０・・・プリント基板、４１・
・・通電制御回路用電気部品、４２・・・空隙、４３・
・・固定軸、４４，４・５・・・軸受、４６・・・ロー
タ、４７・・・ロータヨーク、４８・・・６極の界磁マ
グネット、４９・・・連結部材、５０・・・内周面、５
１・・・駆動用磁極、５２・・・位置検知用磁極、５３
・・・位置検知素子、５４・・・Ｔ字形突極、５５・・
・くびれ部、５６・・・駆動コイル、５７・・・周面傘
部、５８・・・通電制御回路、５９・・・プラス電源端
子、６０・・・グランド。１８７−Figure 1 is a vertical cross-sectional view of a conventional three-phase small DC brushless motor with two pole field magnets, three salient poles, and three coils.
Fig. 2 is a perspective view of the stator core shown in Fig. 1, Fig. 3 is a perspective view of the two-pole field magnet shown in Fig. 1, and Fig. 4 is a conventional two-pole field magnet, six salient poles, A plan view showing the state of the field magnet and stator core in a 3-phase small DC brushless motor with 6 coils. A cross-sectional view of a small DC brushless motor, FIGS. 6 and 7 are explanatory diagrams of another conventional two-phase small DC brushless motor having four coils, and FIG. 8 shows an embodiment of the present invention.
A vertical cross-sectional view of a two-phase small DC brushless motor having a field magnet, four salient poles, four coils, and one position detection element. Figure 9 shows the relationship between the field magnet and stator core in Figure 8. FIG. 10 is a developed view of the field magnet and the drive coil group. 1...3-phase small DC brushless motor, 2...3 salient pole stator core, 3...2 pole field magnet, 4...
...Fixed pedestal, 5...T-shaped salient pole piece, 6...Rotating shaft insertion hole, 7...Drive coil, end...Coil winding part, 9...Outer periphery, 10.11 ...Bearing, 12...
Bearing support member, 13... Rotating shaft, 14... Cup-shaped rotor yoke, 15... Position detection element, 16... Printed circuit board, 17... Salient pole piece, 18... Four-pole field Magnetic magnet, 2-phase small DC brushless motor with 4 salient poles and 4 coils, 19... Field magnet, 20.
...Rotor yoke, 21...Stator core, 22...
Salient pole, 23... Drive coil, 24... Hall IC,
25... Stator core, 26... Main salient pole, 27...
Auxiliary salient pole, 28... Drive coil, 29... Field magnet, 30... 2-phase small DC brushless motor, 3
1... Field magnet, 31a... Drive magnetic pole, 3
1b...Auxiliary magnetic pole, 32...Stator core, 33...
・Main salient pole, 34... Auxiliary salient pole, 35... Drive coil, 36... 6-pole field magnet, 2-phase small DC brushless motor with 4 salient poles and 4 coils, 37...・
Flat fixed side cup body, 38... Stator core, 39...
- Stator core support, 40... printed circuit board, 41.
・Electrical component for energization control circuit, 42 ・Air gap, 43・
... Fixed shaft, 44, 4, 5... Bearing, 46... Rotor, 47... Rotor yoke, 48... 6-pole field magnet, 49... Connection member, 50... Inside Peripheral surface, 5
1... Magnetic pole for driving, 52... Magnetic pole for position detection, 53
...Position detection element, 54...T-shaped salient pole, 55...
- Constricted portion, 56... Drive coil, 57... Circumferential umbrella portion, 58... Energization control circuit, 59... Positive power supply terminal, 60... Ground. 187-

Claims

[Scope of utility model registration request]

Four T-shaped salient poles are connected radially at equal intervals, a driving coil is wound around each salient pole, and an N
A six-pole field magnet having driving magnetic poles of S, alternately provided is provided, and the opening angle of the circumferential surface of the T-shaped salient pole is formed to have a width approximately equal to the magnetic pole width of the field magnet, and dead points are eliminated. The salient pole is formed so that the air gap length between this circumferential surface and the field magnet gradually increases in a predetermined direction, and the salient pole is positioned at a suitable position so that the field magnet can self-start. 6-pole, 4-coil, characterized in that one position detection element is disposed at an appropriate position, the iron core side having salient poles around which the coil is wound is used as a stator, and the above field magnet is used as a rotor; A 2-phase small DC brushless motor with one position sensing element.