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Title:
STEERING ENGINE, AND MULTI-POLE BRUSHLESS DC MOTOR HAVING PERMANENT MAGNET FOR SAME
Document Type and Number:
WIPO Patent Application WO/2016/176899
Kind Code:
A1
Abstract:
A steering engine, and multi-pole brushless DC motor having permanent magnets for the same. The brushless DC motor comprises a stator (1) fixed inside a housing of the motor, a rotor (2) arranged inside the stator (1), and sensors (3) circumferentially arranged around the rotor (2) and sensing a change of the magnetic pole during the rotation of the rotor (2) to emit signals. The rotor (2) comprises a plurality of tile permanent magnets for increasing the magnetic sensing density of the steering engine so as to improve the rotation control precision thereof. The plurality of tile permanent magnets are arranged at equal distances circumferentially around the rotor (2) and fixedly connected to a rotor axle (203) of the rotor (2). The tile permanent magnets have the same shape and are either a south-pole permanent magnet (201) or a north-pole permanent magnet (202). A south-pole permanent magnet (201) and a north-pole permanent magnet (202) form a pair of magnetic poles. The rotor (2) comprises at least two pairs of magnetic poles. The tile permanent magnets can be magnetized circumferentially around the rotor (2) in one pass after assembly or can also be assembled after being magnetized separately. The present invention has a simple assembling process, a low magnetic flux leakage co-efficient, a high air-gap magnetic density, and high utilization of the permanent magnets.

Inventors:
LIU, Guosheng (Room.301, Block A7 Lu Valley International Industrial Park,No.229 Tongzipo Rd , Hi-tech Industrial Development Zon, Changsha Hunan 5, 410205, CN)
LIU, Xinnian (Room.301, Block A7 Lu Valley International Industrial Park,No.229 Tongzipo Rd , Hi-tech Industrial Development Zon, Changsha Hunan 5, 410205, CN)
MAO, Jianling (Room.301, Block A7 Lu Valley International Industrial Park,No.229 Tongzipo Rd , Hi-tech Industrial Development Zon, Changsha Hunan 5, 410205, CN)
Application Number:
CN2015/082081
Publication Date:
November 10, 2016
Filing Date:
June 23, 2015
Export Citation:
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Assignee:
CHANGSHA METRIC ELECTRIC TECHNOLOGY CO., LTD. (Room.301, Block A7 Lu Valley International Industrial Park,No.229 Tongzipo Rd , Hi-tech Industrial Development Zon, Changsha Hunan 5, 410205, CN)
International Classes:
H02K21/14; H02K1/27
Foreign References:
CN203562922U2014-04-23
CN202524184U2012-11-07
CN104052172A2014-09-17
CN101951103A2011-01-19
US6013962A2000-01-11
Attorney, Agent or Firm:
CHANGSHA YONGXING PATENT & TRDEMARK LAW AGENCY (113 Xiaoxiang Road, Changsha, Hunan 6, 410006, CN)
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