AC generator for motor vehicle, has set of magnet insertion through-holes with elongation axis extending radially and cross-sectional shape having radially opposing recesses for forming two thin-wall regions between through-holes

摘要

The generator has a stacked-lamination core formed by laminations of magnetic material stacked along an axial direction of a rotor. The core is formed with a set of axially extending magnet insertion through-holes. The through-holes has an elongation axis extending radially and a cross-sectional shape having two radially opposing recesses to form two axially extending thin-wall regions (202a, 202b) between the through-holes.