Patent ID: 7852183
Filing Date: 2010-12-14
Classification: H02K

Abstract:
1. An actuator assembly, comprising: a power drive unit adapted to receive drive power and configured, upon receipt of the drive power, to rotate; an actuator coupled to the power drive unit and configured, in response to power drive unit rotation, to move to a position; a latch rotor coupled to the power drive unit to rotate therewith, the latch rotor comprising a main body having N-number of lobes extending radially therefrom, N being a number greater than one; (N/2)-number of permanent magnet pole pairs spaced apart from and at least partially surrounding the latch rotor, each of the permanent magnet pole pairs supplying a permanent magnetic field that opposes rotation of the latch rotor; and an electromagnet adapted to receive a flow of electrical current and configured, upon receipt thereof, to generate a magnetic field that simultaneously opposes all of the permanent magnetic fields supplied from the permanent magnet pole pairs or simultaneously aids all of the permanent magnetic fields supplied from the permanent magnet pole pairs, the electromagnet comprising: