SERVO MOTOR HAVING INTERIOR SPOKE-TYPE PERMANENT MAGNET ROTOR

摘要

Disclosed is a servo motor having an interior spoke-type permanent magnet rotor. A rotor side interior spoke-type permanent magnet is a polyhedron consisting of a surface, a bottom surface opposite to the surface, a left side surface, a right side surface, and two end surfaces. The left and right side surfaces are symmetric mutually, and the left and right side surfaces are curved surfaces formed by multiple planes. The broken lines on the curved surfaces are parallel to a rotating shaft. According to the present invention, the side surfaces of the rotor side permanent magnet are the curved surfaces. Compared with the rotor side permanent magnet of a rectangular structure, the pole-arc coefficient of a motor rotor side is increased, so that the reluctance torque of the motor is more greatly improved, thereby improving the torque density and overloading capacity of the motor. In addition, the number of permanent magnets is reduced, and the manufacturing cost of the motor is further reduced. In the field of the small and medium capacity of servo motors, there is a larger rotor core area near the rotating shaft side, so as to facilitate flexible configuration of a magnetic insulation slot of the rotor core near the rotating shaft side.