Title:
LINEAR MOTOR
Document Type and Number:
WIPO Patent Application WO/2022/047939
Kind Code:
A1
Abstract:
A linear motor, comprising a housing (1), a primary (3), and a secondary (7) that forms an air gap (5) together with the primary (3). The primary (3) comprises an iron core (31) and a winding (33) wound on the end of the iron core (31) close to the air gap (5). The iron core (31) comprises a yoke (311) and a plurality of teeth (313) formed by extending from the yoke (311). Permanent magnets (35) are embedded in the teeth (311), and the magnetic poles of two adjacent permanent magnets (35) are opposite. Each permanent magnet (35) comprises a first permanent magnet (351) and a second permanent magnet (353) arranged at an included angle. An angle bisector a of the included angle extends from the vertex of the included angle to the secondary and is perpendicular to a plane where the secondary is located, and the first permanent magnet (351) and the second permanent magnet (353) are symmetrically distributed about the angle bisector a. The magnetic poles of the first permanent magnet (351) and the second permanent magnet (353) close to one side of the primary are the same, the degree of the included angle is α, and 0°<α<180°. The linear motor can effectively increase the volume of the embedded permanent magnets to significantly enlarge the magnetic field on an air gap side, thereby increasing the thrust density of the linear motor.
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Inventors:
GUO SHUN (CN)
SHI WEILING (CN)
WANG HONGXING (CN)
SHI WEILING (CN)
WANG HONGXING (CN)
Application Number:
PCT/CN2020/123425
Publication Date:
March 10, 2022
Filing Date:
October 23, 2020
Export Citation:
Assignee:
AAC ACOUSTIC TECH SHENZHEN CO LTD (CN)
AAC TECH NANJING CO LTD (CN)
AAC TECH NANJING CO LTD (CN)
International Classes:
H02K41/03
Foreign References:
| CN111564949A | 2020-08-21 | |||
| CN101179224A | 2008-05-14 | |||
| CN102361388A | 2012-02-22 | |||
| CN101179223A | 2008-05-14 | |||
| CN109560680A | 2019-04-02 | |||
| CN1461096A | 2003-12-10 | |||
| US5218250A | 1993-06-08 | |||
| JPS63198572A | 1988-08-17 |
Attorney, Agent or Firm:
SHENZHEN ZICHEN INTELLECTUAL PROPERTY AGENCY LIMITED (CN)
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