ELECTRIC MOTOR WITH IMPROVED FLUX PATH AND POWER DENSITY

摘要

An improved configuration for an electric motor has an inner rotor and an outer stator wherein each stator coil is arranged radially outwardly of its respective stator pole and configured to create a magnetic flux path forming a closed magnetic circuit that flows in directions parallel to the longitudinal axis of the motor, rather than circumferentially about the longitudinal axis of the motor. The magnetic flux created by the stator coil is directed from the stator pole, across the air gap to a corresponding rotor pole, and back to the stator pole to form a closed magnetic circuit path. All stator poles are therefore magnetically isolated from each other.

主权项

1. An improved configuration for an electric motor comprising:
an inner rotor rotatable on a longitudinal axis of the motor and provided with a circumferential array of rotor poles facing radially outwardly, an outer stator provided with a circumferential array of stator poles excitable by respective stator coils facing radially inwardly toward corresponding rotor poles separated by a thin radial air gap, wherein each stator coil is arranged radially outwardly of its respective stator pole and configured to create a magnetic flux path forming a closed magnetic circuit that flows in directions parallel to the longitudinal axis of the motor, rather than circumferentially about the longitudinal axis of the motor.