JPS6082975U

JPS6082975U - Spindle motor for disk drive

Info

Publication number: JPS6082975U
Application number: JP17365883U
Authority: JP
Inventors: 信二鈴木
Original assignee: 山洋電気株式会社
Priority date: 1983-11-11
Filing date: 1983-11-11
Publication date: 1985-06-08

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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来のディスク駆動用スピンドルモータの要部
を示す破砕断面図、第２図は従来のステータの部を示す
平面図、第３図Ａ、　−Ｂ、　Ｃは従来の１相励磁力式
における電圧・電流の関係を示す波形図、第４図は本考
案の実施例の要部を示す破砕断面図、第５図は本考案に
おけるステータの要部を示す平面図、第６図Ａ、　Ｂ、
　Ｃは本考案に用いる２相励磁力式における電圧・電流
の関係を示す波形図、第７図は従来の１相励磁力式を説
明する回路図、第８図は本考案に用いる２相励磁力式を
説明する回路図である。１０・・田−タ、１１・・・回転軸、１２・・・回転体
、１３・・・永久磁石からなる磁極、１４・・・ディス
ク保持体、２０・・・ステータ、２１・・・鉄心、２２
ａ〜２２ｐ・・・歯部、２３〜２６・・・励磁コイル。Fig. 1 is a fragmented sectional view showing the main parts of a conventional disk drive spindle motor, Fig. 2 is a plan view showing the conventional stator part, and Fig. 3 A, -B, and C are conventional one-phase excitation forces. A waveform diagram showing the relationship between voltage and current in the equation, FIG. 4 is a fragmented sectional view showing the main parts of the embodiment of the present invention, FIG. 5 is a plan view showing the main parts of the stator in the present invention, and FIG. 6A ,B,
C is a waveform diagram showing the relationship between voltage and current in the two-phase excitation force type used in the present invention, Figure 7 is a circuit diagram explaining the conventional one-phase excitation force type, and Figure 8 is the two-phase excitation used in the present invention. FIG. 2 is a circuit diagram illustrating a power formula. DESCRIPTION OF SYMBOLS 10... Data center, 11... Rotating shaft, 12... Rotating body, 13... Magnetic pole consisting of a permanent magnet, 14... Disk holder, 20... Stator, 21... Iron core , 22
a to 22p...teeth, 23 to 26...excitation coil.

Claims

[Scope of utility model registration request]

A stator in which excitation coils of multiple phases are wound around a plurality of teeth protruding from the outer periphery of an iron core at predetermined intervals to form a plurality of magnetic poles; and a rotor having magnetic poles made of a plurality of permanent magnets arranged at predetermined intervals so as to face the magnetic poles of the stator, and the rotor is directly connected to a rotating shaft that supports a disk holder. In the motor, the stator core has at least 12 teeth, and the excitation coil is an odd-numbered coil for two-phase excitation, with one coil commonly wound around two adjacent teeth. is wound around each set of teeth consisting of two adjacent teeth, and a coil with a corner number phase is wound around each set of teeth consisting of two adjacent teeth in a different combination from the above. The odd-numbered phase coils and the corner-numbered phase coils are arranged with their positions shifted from each other in the radial direction of the stator, and the stator is excited in two phases to form a set of adjacent tooth portions. at least 6
A spindle motor for driving a disk, characterized in that it is configured to have two magnetic poles.