Title:
LINEAR ELECTRIC MOTOR
Document Type and Number:
WIPO Patent Application WO/2022/047894
Kind Code:
A1
Abstract:
A linear electric motor, comprising a housing (1), a primary (3), and a secondary (7), which forms an air gap (5) with the primary (3), wherein the primary (3) comprises an iron core (31) and a winding (33) wound around the iron core (31); the iron core (31) comprises a yoke portion (311) and a plurality of tooth portions (313), which are provided with permanent magnets (35) in an embedded manner; the magnetic poles of every two adjacent permanent magnets (35) are opposite; each permanent magnet (35) comprises a first permanent magnet (351) and a second permanent magnet (353), which are arranged at an included angle in a spaced manner and are symmetrically distributed with respect to an angular bisector (a) of the included angle, as well as a third permanent magnet (355); the angular bisector (a) of the included angle extends from the vertex (b) of the included angle to the secondary (7) and is perpendicular to a plane where the secondary (7) is located; the first permanent magnet (351) and the second permanent magnet (353) are respectively located at two opposite ends of the third permanent magnet (355); the magnetic poles of the sides of the first permanent magnet (351), the second permanent magnet (353) and the third permanent magnet (355) that are close to the secondary (7) are the same; and the included angle ranges from 0° to 180°. According to the linear electric motor, the volumes of the embedded permanent magnets (35) can be effectively increased, such that a magnetic field on the side of the air gap is significantly increased, thereby increasing the thrust density of the linear electric motor.
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Inventors:
GUO SHUN (CN)
SHI WEILING (CN)
WANG HONGXING (CN)
SHI WEILING (CN)
WANG HONGXING (CN)
Application Number:
PCT/CN2020/120696
Publication Date:
March 10, 2022
Filing Date:
October 13, 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:
H02K41/02; H02K1/06; H02K3/28
Foreign References:
| CN103997187A | 2014-08-20 | |||
| CN105406684A | 2016-03-16 | |||
| CN106505821A | 2017-03-15 | |||
| CN106953497A | 2017-07-14 | |||
| CN106992655A | 2017-07-28 | |||
| CN201150027Y | 2008-11-12 | |||
| EP3696957A1 | 2020-08-19 | |||
| JP2008278709A | 2008-11-13 | |||
| JPH10174419A | 1998-06-26 |
Attorney, Agent or Firm:
SHENZHEN ZICHEN INTELLECTUAL PROPERTY AGENCY LIMITED (CN)
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