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Patent Searching and Data


Title:
ELECTRIC MOTOR
Document Type and Number:
WIPO Patent Application WO/2021/182783
Kind Code:
A1
Abstract:
An electric motor is provided. The electric motor according to an example embodiment of the present invention, which is for linearly reciprocating an object along a rod having a predetermined length, comprises: a housing; a rotor unit that is mounted to the inside of the housing via a bearing to be rotatable and comprises a rotor shaft, which is axially-coupled to the rod to linearly reciprocate along the rod during rotation, and a plurality of magnets mounted along the circumference direction of the rotor shaft; and a stator unit comprising at least one stator core and a coil, the at least one stator core comprising a yoke portion of a closed loop shape that is built in the housing so as to surround the circumference of the rotor unit, and a plurality of slot portions extending from the yoke portion toward the rotor, and the coil being wound around at least one slot portion among the plurality of slot portions, wherein the stator core comprises a plurality of first slot portions around which the coil is wound, and a plurality of second slot portions around which the coil is not wound, the plurality of first slot portions are arranged to surround a circular arc portion corresponding to an angle of θ of the entire circumference of a virtual circle connecting the ends of the plurality of first slot portions with the ends of the plurality of second slot portions, and the plurality of second slot portions are arranged to surround a circular arc portion corresponding to an angle of 2π-θ of the entire circumference of the virtual circle.

Inventors:
KIM BYUNG SOO (KR)
Application Number:
PCT/KR2021/002519
Publication Date:
September 16, 2021
Filing Date:
March 02, 2021
Export Citation:
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Assignee:
AMOTECH CO LTD (KR)
International Classes:
H02K1/16; B60N2/02; H02K3/34; H02K3/48; H02K7/06; H02K41/03
Foreign References:
KR20170113634A2017-10-12
US20060232159A12006-10-19
KR20160121490A2016-10-19
KR20090010017A2009-01-28
US20090134738A12009-05-28
Attorney, Agent or Firm:
ERUUM & LEEON INTELLECTUAL PROPERTY LAW FIRM (KR)
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