Patent ID: 8400038

Claim:
An apparatus comprising: a stator; and a rotor disposed for movement relative to the stator and including: a backing member formed of a ferromagnetic material and having a surface; and a flux focusing magnet assembly attached to the surface of the backing member, the flux focusing magnet assembly including: a center portion having a nominal angle of polarization; a first side portion disposed on the backing member on a first lateral side of the center portion and having a first angle of polarization that is less than 90° greater than the nominal angle of polarization; and a second side portion disposed on the backing member on a second lateral side of the center portion, opposite to the first side portion, and having a second angle of polarization that is less than 90° less than the nominal angle of polarization, the first side portion and the second side portion configured to direct flux toward the center portion, the backing member being configured to form a primary flux path for the flux focusing magnet assembly.