Patent ID: 11909336
Assignee: UNIVERSITY INDUSTRY FOUNDATION, YONSEI UNIVERSITY
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. An actuator comprising:
at least two iron cores, each iron core including a pole extending in a first direction parallel to a direction of gravity;
a permanent magnet disposed between the at least two iron cores so as to generate a magnetic field along a shape of a combination of the at least two iron cores arranged so as to be adjacent to each other in a direction not parallel to the first direction; and
a winding wound around the pole of each of the at least two iron cores,
wherein the at least two iron cores include:
a first iron core including a first pole extending in the first direction, and a second pole extending in a second direction perpendicular to the first direction from one side end of the first pole;
a second iron core including a third pole extending in a parallel manner to the extension direction of the first pole, and a fourth pole extending in a parallel manner to the extension direction of the second pole from one side end of the third pole and having an end face facing an end face of the second pole;
a third iron core including a fifth pole extending in a parallel manner to the extension direction of the first pole, and a sixth pole extending in the second direction from one side end of the fifth pole, wherein the third iron core is adjacent to the first iron core and the second iron core such that an angle defined between an end face of the sixth pole and each of the end face of the second pole and the end face of the fourth pole is a right angle; and
a fourth iron core including a seventh pole extending in a parallel manner to the extension direction of the first pole, and an eighth pole extending in a parallel manner to the extension direction of the sixth pole from one side end of the seventh pole and having an end face facing the end face of the sixth pole,
wherein the winding includes:
a first winding wound around the first pole;
a second winding wound around the third pole;
a third winding wound around the fifth pole; and
a fourth winding wound around the seventh pole,
wherein the permanent magnet includes:
a first permanent magnet fixed to the end face of the second pole such that a magnetic flux thereof is directed toward the end face of the fourth pole facing the end face of the second pole;
a second permanent magnet fixed to the end face of the fourth pole such that a magnetic flux thereof is directed toward the end face of the second pole;
a third permanent magnet fixed to the end face of the sixth pole so that a magnetic flux thereof is directed toward the end face of the eighth pole facing the end face of the sixth pole; and
a fourth permanent magnet fixed to the end face of the eighth pole so that a magnetic flux thereof is directed toward the end face of the sixth pole,
wherein the actuator further comprises a central iron core contacting the first to fourth permanent magnets and disposed under the first to fourth permanent magnets, wherein the central iron core extends in a parallel manner to the first direction.