JPH0233591U

JPH0233591U -

Info

Publication number: JPH0233591U
Application number: JP11234888U
Authority: JP
Priority date: 1988-08-26
Filing date: 1988-08-26
Publication date: 1990-03-02

Description

[Brief explanation of the drawing]

第１図ａ〜ｃはそれぞれ本考案の実施例１に用
いる回転子磁石の平面図、同図ａ中Ｘ―Ｘ線断面
図、同図ａ中Ｙ―Ｙ線断面図、第２図は同上の動
作説明図、第３図は本考案の実施例２に用いる回
転子磁石の分解平面図、第４図は同上に用いる回
転子磁石の断面図、第５図ａ，ｂはそれぞれ本考
案の実施例３に用いる回転子磁石の平面図、同図
ａ中Ｘ―Ｘ線断面図、第６図ａ，ｂはそれぞれ本
考案の実施例４に用いる回転子磁石の平面図、同
図ａ中Ｘ―Ｘ線断面図、第７図は本考案に係るス
テツプモータを示す断面図、第８図は同上の分解
斜視図、第９図および第１０図は同上における回
転子磁石とステータコイルとの位置関係を示す原
理説明図、第１１図は従来の回転子磁石における
着磁分布を示す説明図、第１２図は第１１図に示
す回転子磁石を用いた場合の回転特性を示す動作
説明図、第１３図は回転子磁石の望ましい着磁分
布を示す説明図、第１４図は第１３図に示す回転
子磁石を用いた場合の回転特性を示す動作説明図
、第１５図ａ〜ｃはそれぞれ回転子磁石の従来例
を示す平面図、同図ａ中Ｘ―Ｘ線断面図、同図ａ
中Ｙ―Ｙ線断面図である。１０…回転子、１１…回転子磁石、１１ａ…磁
石板、１１ｂ…磁性体板、１５…凹所、１６…切
欠、１７…切欠、１８…切欠、１９…透孔、２０
…固定子、２１…ステータコイル、２２…磁極片
。 Figures 1 a to c are respectively plan views of rotor magnets used in Example 1 of the present invention, a sectional view taken along line X--X in figure a, and a sectional view taken along line Y-Y in figure a, and Figure 2 is the same as above. FIG. 3 is an exploded plan view of the rotor magnet used in the second embodiment of the present invention, FIG. 4 is a sectional view of the rotor magnet used in the same example, and FIGS. A plan view of the rotor magnet used in Example 3, a sectional view taken along the line X--X in Figure 6a, and Figures 6a and b are a plan view of the rotor magnet used in Example 4 of the present invention, respectively. 7 is a sectional view showing the step motor according to the present invention, FIG. 8 is an exploded perspective view of the same, and FIGS. 9 and 10 are views of the rotor magnet and stator coil in the same. 11 is an explanatory diagram showing the magnetization distribution in a conventional rotor magnet. FIG. 12 is an explanatory diagram showing the rotational characteristics when using the rotor magnet shown in FIG. 11. , Fig. 13 is an explanatory diagram showing the desirable magnetization distribution of the rotor magnet, Fig. 14 is an explanatory diagram showing the rotation characteristics when the rotor magnet shown in Fig. 13 is used, and Figs. 15 a to c are explanatory diagrams. A plan view showing a conventional example of a rotor magnet, a sectional view taken along line X--X in Figure a, and Figure A, respectively.
It is a sectional view taken along the middle YY line. 10... Rotor, 11... Rotor magnet, 11a... Magnet plate, 11b... Magnetic plate, 15... Recess, 16... Notch, 17... Notch, 18... Notch, 19... Through hole, 20
... Stator, 21... Stator coil, 22... Magnetic pole piece.

Claims

[Claims for Utility Model Registration] (1) A rotor magnet in which a plurality of magnetic poles formed in a disc shape and magnetized so that both sides in the thickness direction have different polarities arranged in the rotation direction, and a plurality of stators In a stepping motor equipped with a stator arranged spaced apart in the direction of rotation with each magnetic pole of the coil facing one surface in the thickness direction of the rotor magnet, the rotor magnet has a magnetized region and a non-magnetized region. A stepping motor in which magnetic regions are formed alternately in the rotation direction, and the surface of the non-magnetized region is recessed from the surface of the magnetized region. (2) Rotating a rotor magnet in which a plurality of magnetic poles formed in a disk shape and magnetized so that both sides in the thickness direction have different polarities are arranged in the rotation direction, and one magnetic pole of each of the plurality of stator coils. In a stepping motor equipped with a stator arranged spaced apart in the rotational direction so as to face one surface of the child magnet in the thickness direction, the rotor magnet has a magnetized region and a non-magnetized region alternately in the rotational direction. A stepping motor is formed of a rotor magnet, and the portion corresponding to the non-magnetized region is cut out so as to penetrate the front and back sides of the rotor magnet.