JPH0439042U

JPH0439042U -

Info

Publication number: JPH0439042U
Application number: JP8111990U
Authority: JP
Priority date: 1990-08-01
Filing date: 1990-08-01
Publication date: 1992-04-02

Description

[Brief explanation of the drawing]

第１図は本考案の実施例に係る固定子の横断面
の一部を抽出して示す断面図、第２図はその収納
部に磁性体の棒状部材を挿通した場合の磁束の様
子を示す断面図、第３図はパイプ部材を示す斜視
図、第４図はパイプ部材を収納部に嵌入した実施
例を示す断面図、第５図は前記実施例の適用例を
示す説明図、第６図は従来技術に係る工作機械の
主軸部を概念的に示す説明図である。図面中、１０，１２はスロツト、１１は収納部
、１４，１５はコイル、１６は棒状部材、１７は
パイプ部材、１７ａは磁性体パイプ、１７ｂ，１
７ｃは非磁性体パイプ、１８は固定子である。 Fig. 1 is a sectional view showing a part of the cross section of the stator according to the embodiment of the present invention, and Fig. 2 shows the state of magnetic flux when a magnetic rod-shaped member is inserted into the storage part. 3 is a perspective view showing a pipe member; FIG. 4 is a sectional view showing an embodiment in which the pipe member is fitted into a storage portion; FIG. 5 is an explanatory diagram showing an example of application of the above embodiment; The figure is an explanatory diagram conceptually showing a main shaft portion of a machine tool according to the prior art. In the drawing, 10 and 12 are slots, 11 is a storage part, 14 and 15 are coils, 16 is a rod-shaped member, 17 is a pipe member, 17a is a magnetic pipe, 17b, 1
7c is a non-magnetic pipe, and 18 is a stator.

Claims

[Scope of claims for utility model registration] (1) The total number is m x 3P (however, m is a natural number,
P is the number of poles) n×3 of the stator slots
In a part of the slots P (where n is a natural number where m>n), storage parts extending in the axial direction for storing the rod-shaped members are arranged at equal intervals in the circumferential direction. A stator for an electric motor characterized in that the coils housed are connected in series for each phase. (2) The utility model registration claim No. 1 is characterized in that a three-layer concentric pipe member having a non-magnetic pipe in contact with the outer circumferential surface and inner circumferential surface of the magnetic pipe is fitted into the storage part. A stator for the electric motor according to item 1.