Permanent magnet rotor designed to minimize cogging effect, includes magnets in pockets with air gaps and laminated rotor pack with thinned sections

摘要

The rotor carries permanent magnets (214A-D) with radial magnetization, in adjacent rotor (36) gaps. Next to the gaps, hollow pocket sections remain unfilled by the permanent magnets. Thin bridging sections of the rotor pack (37) laminations, separate these hollow sections from the air gap of the motor. The bridging sections widen in a transition region between ends of the permanent magnets.