Abstract: A single phase permanent magnet brushless motor includes a stator and a rotor. The stator includes an outer housing, a stator core mounted in the outer housing, and windings wound around the stator core. The stator core includes a yoke and a plurality of poles extending inwardly from the yoke. The yoke is fixed to the outer housing by welding. Reliability of the present motor is enhanced.

Abstract: A brushless permanent magnet electric motor (10) configured to have high saliency and low cogging torque, comprises a stator (30) having a plurality of stator teeth (36), and a rotor (50) having a permanent magnet (56) having a plurality of magnetic poles. The stator teeth (36) contain pole heads (37) having grooves (39) substantially parallel to the axial direction of the motor (10) formed thereon, which function to increase the number of magnetic stator poles of the motor (10), increasing saliency. The permanent magnet (56) contains a plurality of notches (58) on one side positioned between the plurality of magnetic poles, configured to decrease the coefficient of pole arc of the rotor (50), thereby decreasing cogging torque.

Abstract: A waste food disposer unit for under sink application has a housing divided into a grinding chamber and a motor chamber. The grinding chamber has an inlet for water and waste matter and an outlet for water and shredded waste matter. A shredder ring 20 is disposed within the grinding chamber and has a plurality of cutting teeth formed by slots extending upwardly from a lower edge of the ring. A grinding disc is disposed within the ring and co-acts with the cutting teeth to shred the waste matter. The grinding disc is connected to the shaft of a motor by amounting bracket. The grinding disc may be conical forming an angle with a normal axis of between 75° and 85°. The mounting plate preferably mounts the grinding disc so that the axis of the shaft is misaligned with the normal axis of the grinding disc by a few degrees, i.e., between 3° and 70°, especially 5°, giving the shredding action between the shredder ring and the grinding disc a sawing or axial movement component.