Patent ID: 6891287
Filing Date: 2005-05-10
Classification: H02K

Abstract:
1. An alternating current motor comprising: a rotor configured to rotate about a longitudinal axis, the rotor comprising a diametrically magnetized permanent magnet; stationary coils having a magnetic axis substantially perpendicular to the rotor's longitudinal axis, the stationary coils adapted to the rotor's outer periphery and being substantially coaxial with the rotor's longitudinal axis; a stator adapted to the stationary coils' outer periphery and being substantially coaxial with the rotor's longitudinal axis; and wherein the diametrically magnetized permanent magnet is configured to cause the rotor's oscillation angle to vary substantially less than 30% between the rotor's oscillation angle at a beginning value of a frequency range of an alternating current in the stationary coils and the rotor's oscillation angle at an ending value of the frequency range of the alternating current in the stationary coils.