ROTOR ASSEMBLY

摘要

PURPOSE: A rotor assembly is provided to reduce the cogging torque by forming a radial slit between a pair of permanent magnets which are embedded in a V-shape on a rotor unit. CONSTITUTION: A rotor unit (10) has an inserting hole (11) in the hollow part. A first magnet (14a) and a second magnet (14b) are inserted into a first bury hole (13a) and a second bury hole (13b). The width (w) of the separate space in the first bury hall and the second bury hall gets greater as it gets closer from the rotation axis of the rotor unit to the outer side of the rotor unit in a radial direction. The first magnet and the second magnet are inserted along the V-shape in a radial direction from the rotation axis of the rotor unit to the outer side of the rotor unit. A slit (30) is formed between the first magnet and the second magnet.