A DEVICE AND METHOD TO CLAMP AND LOCK PERMANENT MAGNETS AND IMPROVE COOLING WITHIN A ROTATING ELECTRICAL MACHINE USING PITCHED FOCUSED FLUX MAGNETS

摘要

Permanent magnets are mounted within an electrical machine in a pitched saw-tooth pattern around the rotor shaft. This focused flux configuration provides for improved magnet mounting strength without resort to bonding or taping; provides improved rotor and stator cooling by access to the axial generator air flow; and provides for a simpler and more easily manufactured design. A laminated version of this basic structure provides for reduced surface losses and self-heating.