The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 07, 2021
Filed:
Dec. 13, 2019
Lg Electronics Inc., Seoul, KR;
LG ELECTRONICS INC., Seoul, KR;
Abstract
The present disclosure relates to a motor rotor assembly and a method of aligning a pole center of a permanent magnet thereof. The motor rotor assembly includes a permanent magnet including a plurality of disc type magnet units which have center holes and are segmented in an axial direction, first and second shafts coupled to both end portions of the permanent magnet, a rod which protrudes from a center of the first shaft in the axial direction, is coupled to a center of the second shaft, and passes through the center hole of each of the plurality of disc type magnet units to assemble the permanent magnet, and a sleeve which surrounds an outer circumferential surface of the permanent magnet and fixes the permanent magnet to the first and second shafts, wherein, when the plurality of disc type magnet units are assembled, the plurality of disc type magnet units are formed to have a small amount of magnetic force, pole centers of the disc type magnet units adjacent to each other are aligned due to an attractive force and a repulsive force therebetween, and after the assembly, the plurality of disc type magnet units are fully magnetized to have a preset maximum magnetic force, and polarities of the disc type magnet units, which are adjacent to each other, are formed to be the same.