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Title:
MAGNETIC FIELD MODULATION-TYPE DOUBLY SALIENT MOTOR AND DISTRIBUTION DESIGN METHOD FOR SALIENT TEETH OF MOTOR
Document Type and Number:
WIPO Patent Application WO/2022/110273
Kind Code:
A1
Abstract:
A magnetic field modulation-type doubly salient motor and a distribution design method for salient teeth of the motor. The motor comprises a stator (1) and a rotor (2). The stator (1) comprises a stator core, two sets of windings, and two sets of permanent magnets (81, 82). Each stator tooth (3) is split into two excitation teeth (4), and each excitation tooth (4) is split into two salient teeth (71, 72). The two sets of windings are respectively an armature winding (6) and an excitation winding (5), the armature winding (6) is wound around the stator teeth (3), and the excitation winding (5) is wound around adjacent excitation teeth (4) formed by splitting different stator teeth (3). The two sets of permanent magnets (81, 82) which are magnetized in the tangential direction are respectively placed at an opening and a bottom of an excitation slot. The polarities of permanent magnets placed in the same slot and at same positions of adjacent slots are opposite. Design of the doubly salient structure allows a magnetic field to modulate rich working harmonics in an air gap to improve thrust of the motor. A permanent magnet magnetic circuit only forms a loop in the stator teeth (3), thereby solving the problem that a motor is prone to saturation. According to the distribution design method for the salient teeth (71, 72), a harmonic contribution amplitude is adjusted by changing distribution of the salient teeth (71, 72), thereby improving the thrust of the motor.

Inventors:
ZHAO WENXIANG (CN)
JIANG TINGTING (CN)
XU LIANG (CN)
JI JINGHUA (CN)
Application Number:
PCT/CN2020/133829
Publication Date:
June 02, 2022
Filing Date:
December 04, 2020
Export Citation:
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Assignee:
UNIV JIANGSU (CN)
International Classes:
H02K1/24; H02K21/04; H02K3/52
Foreign References:
CN111509941A2020-08-07
CN111969822A2020-11-20
CN101527471A2009-09-09
CN101656459A2010-02-24
KR100820168B12008-04-07
Attorney, Agent or Firm:
NANJING IPZHI INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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