Patent ID: 8067871
Filing Date: 2011-11-29
Classification: B60L,H02K,Y02T

Abstract:
1. A permanent magnet rotating electric machine for an electric car, comprising: a stator; a rotor having a rotor iron core being arranged opposite said stator with a rotation air gap therebetween; a plurality of magnetic poles in said rotor iron core; a plurality of auxiliary magnetic pole portions, each of which is located between a pair of said magnetic poles; and a plurality of bridge portions, each of which connects a first rotor iron core portion with one of said auxiliary magnetic pole portions, wherein said magnetic poles have alternating polarity in a rotational direction of said rotor, wherein each magnetic pole comprises two permanent magnets of common polarity arranged at an angle of less than 180° with respect to one another and opening toward said stator, wherein a first magnetic gap and a second rotor iron core portion are provided between radially inward ends of said two permanent magnets of common polarity for each magnetic pole, wherein each of said second rotor iron core portions connects a respective first rotor iron core portion with a third rotor iron core portion, wherein second magnetic gaps are provided between radially outward ends of each of said two permanent magnets and respective bridge portions, and wherein said first rotor iron core portions are radially outside each magnetic pole, and said third rotor iron core portions are located radially inside each magnetic pole.