To provide a torque motor which increases torque without increasing a supply current.
Protrusion and recess formed on the inner peripheral wall of a stator core 20 are formed by protrusions 21a, 21b protruding toward the rotor 40 side and coil accommodating parts 22a, 22b formed in recessed types which wind and accommodate windings of coils 31, 32. The protrusions 21a and the coil accommodating part 22b, and the protrusion 21b and the coil accommodating part 22a are positioned in point symmetry setting a rotating shaft 100 of the rotor 40 as the center. The protrusions 21a, 21b protrude on the rotor 40 side, so that an air gap (d) formed by the protrusions 21a and a permanent magnet 42, and the protrusion 21b and a permanent magnet 43 is made small. As a result, large torque is generated with the same supply current, as compared with a stator core which is not provided with the protrusions 21a, 21b.
TAKEDA KENJI
KAJITA YUKINOBU
DENSO CORP