公开(公告)号：US20230336039A1

公开(公告)日：2023-10-19

申请号：US17765847

申请日：2021-01-21

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Dawei LI ,  Li FANG ,  Xiang REN ,  Ronghai QU

IPC: H02K1/17 ,  H02K1/14

CPC classification number: H02K1/17 ,  H02K1/146

Abstract: A vernier permanent magnet motor with a stator having coded auxiliary teeth which belongs to the technical field of permanent magnet motors. The motor includes a stator and a rotor that are coaxially sleeved, and an air gap is formed between the stator and the rotor. Coded auxiliary tooth structures are provided on a side surface in the stator close to the air gap, and first permanent magnets are provided on part of the coded auxiliary tooth structures. A plurality of pairs of second permanent magnets and ferromagnets are arranged around a side surface in the rotor close to the air gap. The first permanent magnets and the ferromagnets generate a first magnetic field, the second permanent magnets and the coded auxiliary tooth structures generate a second magnetic field, and the magnetic fields are superimposed to form working magnetic fields.

公开(公告)号：US20220216777A1

公开(公告)日：2022-07-07

申请号：US17606737

申请日：2021-01-21

Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Dawei LI ,  Li FANG ,  Xiang REN ,  Ronghai QU

IPC: H02K21/22 ,  H02K1/2791

Abstract: A method includes calculating an initial phase θgv of each air gap working magnetic field Bgv required to generate positive back EMF based on certain parameters of each armature harmonic vth; generating Bgv and maximizing a sum of equivalent air gap flux density amplitude Beqv of each of the air gap working magnetic fields Bgv while calculating a phase θmv and a pole arc coefficient αv corresponding to each permeance harmonic; designing a number, a position(s) and a length(s) along a circumference of modulation teeth corresponding to each of the permeance harmonics based on the phase θmv and the pole arc coefficient αv, such that a generated permeance model is consistent with the phase θmv of each of the permeance harmonics; and optimizing radial dimensions of modulation teeth corresponding to each of the permeance harmonics to maximize the sum of equivalent air gap flux density amplitude Beqv.