| 摘要 |
Electromagnetic actuator with rotary core, of the type comprising, housed into a casing: a magnetic yoke, a pair of fixed adjacent coils alternately energized, and a rotating element with magnetic core; the yoke, the coils and the core having a common axis coinciding with that of the actuator, and the core being positioned between and/or within said coils, so as to close alternative circuits of magnetic flux - generated in the yoke by either one of said coils - between opposite axial pole pieces and central radial pole pieces of said yoke. In said actuator: the yoke (2) comprises a single radial pole piece (11) common to both coils (3, 4) and two sets of axial end pole pieces (13, 14); the core (7) comprises a continuous central part magnetically cooperating with the radial pole piece (11) of the yoke (2) and two opposite sets of pole pieces (15, 16) axially projecting from said central part and magnetically cooperating with said sets of axial pole pieces (13, 14) of the yoke (2); in the two sets of pole pieces (15, 16) of said core (7), or alternatively in the two sets (13, 14) of said yoke (2), the pole pieces of one set are offset in respect of the pole pieces of the other set.
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