MAGNET FIXING STRUCTURE

• Main Authors: ASAHI KYOHEI, TSUZUKI TAKANORI
• Format: Patent
• Language: English; Japanese
• Published: 01.09.2023
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; ELECTRICITY; GENERATION

To provide a magnet fixing structure for detecting a rotation speed of a rotary shaft so as to improve reliability of a rotary electric machine.SOLUTION: A magnet fixing structure comprises: an annular fixing member 41 which is mounted to a rotary shaft 3 of a rotary electric machine; and at least one magnet 42, which is mounted to the fixing member 41, for detecting a rotation speed of the rotary shaft 3. The fixing member 41 includes: a cylindrical part 41A extrapolated over an entire circumference of the rotary shaft 3; and a magnet fixing part 41B for fixing the magnet 42 at an outer peripheral position of the cylindrical part 41A. At least one hole 41Ca is provided between the magnet fixing part 41B and the cylindrical part 41A in the fixing member 41 in a view in a direction along the rotary shaft 3.SELECTED DRAWING: Figure 5 【課題】回転電機の信頼性を高め得る回転軸の回転数を検出するマグネットの固定構造を提供する。【解決手段】回転電機の回転軸３に取り付けられる環状の固定部材４１と、固定部材４１に取り付けられ、回転軸３の回転数を検出するための少なくとも一つのマグネット４２と、を有し、固定部材４１が、回転軸３の全周に亘って外嵌される筒部４１Ａと、筒部４１Ａの外周位置においてマグネット４２を固定するマグネット固定部４１Ｂと、を備え、回転軸３に沿う方向視において、固定部材４１におけるマグネット固定部４１Ｂと筒部４１Ａとの間には、少なくとも一つの孔部４１Ｃａが設けられている。【選択図】図５