JPS6268483U

JPS6268483U -

Info

Publication number: JPS6268483U
Application number: JP15906085U
Authority: JP
Priority date: 1985-10-17
Filing date: 1985-10-17
Publication date: 1987-04-28

Description

[Brief explanation of the drawing]

第１図は従来例の１実施例としての偏平形状４
相ステツピングモータの縦断面図、第２図はマグ
ネツトロータの平面図、第３図は上段のＡ相用及
び相用駆動コイルと下段のＢ相用及び相用駆
動コイルとの対向関係を示す説明図、第４図は界
磁マグネツトと駆動コイル群との展開図、第５図
は駆動コイル群の結線図、第６図は２相励磁４相
パルス通電回路、第７図は駆動コイル群へ通電す
るタイムチヤート図、第８図は本考案第一実施例
としての４相ステツピングモータの縦断面図、第
９図は第８図の４相ステツピングモータに用いた
駆動コイルの斜視図、第１０図は本考案第二実施
例の４相ステツピングモータの縦断面図、第１１
図は本考案第三実施例の駆動コイルの説明図であ
る。１，１′，１″……偏平形状４相ステツピング
モータ、３，４，４′……ステータヨーク、７…
…回転軸、８……界磁マグネツト、９―１，９′
―１……Ａ相用駆動コイル、９―２，９′―２…
…相用駆動コイル、９―３，９′―４……Ｂ相
用駆動コイル、９―４……相用駆動コイル、３
５……磁性体。 Figure 1 shows a flat shape 4 as an example of a conventional example.
Fig. 2 is a longitudinal sectional view of the phase stepping motor, Fig. 2 is a plan view of the magnet rotor, and Fig. 3 shows the opposing relationship between the A-phase and phase drive coils in the upper stage and the B-phase and phase drive coils in the lower stage. 4 is a development diagram of the field magnet and drive coil group, FIG. 5 is a wiring diagram of the drive coil group, FIG. 6 is a two-phase excitation four-phase pulse energization circuit, and FIG. 7 is a drive coil. Fig. 8 is a longitudinal sectional view of a four-phase stepping motor according to the first embodiment of the present invention, and Fig. 9 is a perspective view of the drive coil used in the four-phase stepping motor of Fig. 8. 10 is a vertical sectional view of a four-phase stepping motor according to a second embodiment of the present invention, and FIG.
The figure is an explanatory diagram of a drive coil according to a third embodiment of the present invention. 1, 1', 1''...Flat shape 4-phase stepping motor, 3, 4, 4'...Stator yoke, 7...
...Rotating shaft, 8...Field magnet, 9-1, 9'
-1...A-phase drive coil, 9-2, 9'-2...
...Phase drive coil, 9-3, 9'-4...B phase drive coil, 9-4...Phase drive coil, 3
5...Magnetic material.

Claims

[Claims of Utility Model Registration] 1. A four-phase stepping motor characterized by comprising the following constituent features a to g. (a) A flat type field magnet magnetized into four poles in the thickness direction so as to alternately have N and S magnetic poles is rotatably provided, and (b) a stator is attached to the lower surface of the field magnet through a gap. (c) Two air-core type A-phase and phase drive coils and two air-core type B-phase and phase drive coils are installed on the surface of the stator yoke that faces the field magnet. (d) The phase and A phase drive coils and the B and phase drive coils are arranged with a phase shift of 45 degrees in the circumferential direction; (e) (f) At least two of the drive coils have conductor parts in the circumferential direction that do not contribute to the generated torque. The coils should be bent on the magnetic magnet or stator yoke side so that even if a total of four drive coils are arranged overlapping, the thickness will not be doubled. 2. A utility model registration claim 1, in which a magnetic body is disposed within a cavity within the frame of the drive coil, wherein the drive coil is provided with a step drive means by energizing the drive coil for the drive coil, the phase drive coil, and the drive coil for the phase drive coil. 4
phase stepping motor. 3. The four-phase stepping motor according to claim 2, wherein a magnetic material having a thickness thinner than the thickness of the drive coil is disposed within the hollow portion within the frame of the drive coil.