Patent ID: 6940199
Filing Date: 2005-09-06
Classification: H02K,Y10T

Abstract:
1. A permanent magnet rotor comprising: a plurality of permanent magnet pieces fixed in a plurality of magnet attaching segments provided on the outer periphery or inner periphery thereof, respectively, and a rotor iron core with concaves each provided between the permanent magnet pieces adjacent to each other and protrusions each provided in each the concaves to protrude outwardly in the radial direction thereof, wherein between a sandwiching angle α formed by two sides connecting both outer ends of each the concaves to the center axis of the rotor iron core and a sandwiching angle β formed by two sides connecting both outer ends of each the protrusions to the center axis of the rotor iron core, a relationship 0.3<β/α<0.5 is satisfied.