Patent ID: 7462969

Claim:
An electromagnetic actuator comprising: a permanent-magnet rotor; a stator that is magnetically bonded to the permanent-magnet rotor and substantially surrounds the permanent-magnet rotor; at least two coils that excite the stator; and a rotor housing that rotatably supports and houses the permanent-magnet rotor, the rotor housing supporting the stator so that magnetic poles of the stator face an outer peripheral face of the permanent-magnet rotor, one of each of the at least two coils being wound around portions of the stator extending to the outside of the rotor housing; wherein the rotor housing has at least two openings, wherein one of each of the at least two openings corresponds to one of each of the at least two coils so that the at least two coils are immediately proximate to the permanent-magnet rotor; and further wherein the stator comprises a notch sized to engage a convex portion of the housing to position the stator relative to the rotor housing.