JPS63146466U

JPS63146466U -

Info

Publication number: JPS63146466U
Application number: JP3858287U
Authority: JP
Priority date: 1987-03-17
Filing date: 1987-03-17
Publication date: 1988-09-27

Description

[Brief explanation of the drawing]

第１図及び第２図はこの考案の一実施例を示す
図で、第１図は回転子の一部を切除して示す平面
図、第２図は円環状永久磁石と電機子コイルとの
位置関係を展開図で部分的に示す側面図、第３図
〜第５図は従来のブラシレスＤＣモータを示す図
で、第３図は一部を断面で示す縦断側面図、第４
図は一部を切除して示す平面図、第５図は円環状
永久磁石と電機子コイルとの位置関係及び磁束分
布を展開図で部分的に示す側面図である。第６図
はブラシレスＤＣモータにおける永久磁石の動作
点を示す特性図、第７図は第３図〜第５図に示す
ブラシレスＤＣモータの問題点を解決する構造の
従来のブラシレスモータにおける環状永久磁石と
電機子コイルとの位置関係を展開図で部分的に示
す側面図である。図において、１は回転子、２は軸、５は円環状
永久磁石、１３ａ，１３ｄは電機子Ｕ相コイル、
１３ｂ，１３ｅは電機子Ｖ相コイル、１３ｃ，１
３ｆは電機子Ｗ相コイル、１３ａ_１，１３ａ_２，
１３ａ_３，１３ｄ_１……はＵ相分割コイル、１３
ｂ_１，１３ｂ_２，１３ｂ_３，１３ｅ_１……はＶ相
分割コイル、１３ｃ_１，１３ｃ_２，１３ｃ_３，１
３ｆ_１……はＷ相分割コイル、１４ａ_１，１４ａ
_２，１４ａ_３，１４ａ_４，１４ａ_５，１４ａ_６，
１４ｂ_１，１４ｂ_２……は溝、１５は固定子ヨー
クである。なお各図中同一符号は同一又は相当部
分を示す。 Figures 1 and 2 are diagrams showing one embodiment of this invention, with Figure 1 being a partially cutaway plan view of the rotor, and Figure 2 showing the structure of the annular permanent magnet and armature coil. FIGS. 3 to 5 are side views showing the positional relationship partially in a developed view, and FIGS. 3 to 5 are views showing conventional brushless DC motors. FIG.
The figure is a plan view with a portion cut away, and FIG. 5 is a side view partially showing the positional relationship and magnetic flux distribution between the annular permanent magnet and the armature coil in a developed view. Fig. 6 is a characteristic diagram showing the operating points of the permanent magnet in a brushless DC motor, and Fig. 7 is an annular permanent magnet in a conventional brushless motor with a structure that solves the problems of the brushless DC motor shown in Figs. 3 to 5. FIG. 3 is a side view partially showing the positional relationship between the armature coil and the armature coil in a developed view. In the figure, 1 is a rotor, 2 is a shaft, 5 is an annular permanent magnet, 13a, 13d are armature U-phase coils,
13b, 13e are armature V-phase coils, 13c, 1
3f is the armature W-phase coil, 13a ₁ , 13a ₂ ,
13a ₃ , 13d ₁ ... are U-phase split coils, 13
b ₁ , 13b ₂ , 13b ₃ , 13e ₁ ... are V-phase split coils, 13c ₁ , 13c ₂ , 13c ₃ , 1
3f ₁ ... is a W-phase split coil, 14a ₁ , 14a
₂ , 14a ₃ , 14a ₄ , 14a ₅ , 14a ₆ ,
14b ₁ , 14b _{2 .} . . are grooves, and 15 is a stator yoke. Note that the same reference numerals in each figure indicate the same or equivalent parts.

Claims

[Scope of utility model registration request]

A rotor that has an annular permanent magnet and is rotatable about the center of the annular ring, and a plurality of grooves having equal widths in the rotation direction are circularly arranged at equal pitches in the rotation direction corresponding to the annular permanent magnet. A stator yoke arranged in an annular manner, and an armature coil for each phase divided into a plurality of pieces and wound in grooves of the stator yoke, the permanent magnet and the stator A brushless DC motor in which the rotor is rotated by rotational torque generated by the intersection of a magnetic flux distributed between the yoke and parallel to the rotation center line of the rotor and a current flowing through the armature coil.