AC GENERATOR FOR VEHICLES

摘要

An AC generator (1) for vehicles that has an outer rotor (2), and a stator (3) constituted by having multiple poles (30) with coils (4) wound around them arranged. The stator (3) has right-winding coils (4A) and left-winding coils (4B) arranged alternately, and repeatedly. The AC generator (1) for vehicles is provided with a switching circuit (6) that is constituted so as to; conduct power generation using all the coils (4) when the rotating velocity of the outer rotor is lower than a prescribed rotating velocity; and suspend power generation at a coil group (5B) that includes coils (4) of two or more poles (30) that are adjacent to each other, and conduct power generation at the remaining coil group (5A), when the rotating velocity of the outer rotor is equal to or higher than the prescribed rotating velocity.