Patent ID: 7511391
Filing Date: 2009-03-31
Classification: H02K

Abstract:
1. An electromagnetic actuator comprising: a rotor; and a stator around which coils are directly wound, central axes of the coils pointing generally parallel to a tangent of an outer surface of the rotor, wherein: the stator is C-shaped and composed of one part; the rotor is arranged so that a rotation axis thereof is existent in a space surrounded by the stator; both ends of the stator having a surface respectively formed as a first magnetic pole and a second magnetic pole, each surface of a width defined within a range from 15 to 90 degrees from a virtual base line with respect to the rotation axis serving as a center, wherein the virtual base line is set to run a center of the rotation axis and separate the stator into left and right; and the stator is formed symmetrically with respect to the virtual base line.