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公开(公告)号：US20250157726A1
公开(公告)日：2025-05-15
申请号：US19021098
申请日：2025-01-14
Applicant: SOUTHEAST UNIVERSITY
Inventor： Ming CHENG , Wei QIN , Chengbo LI , Zheng WANG , Wei HUA , Xinkai ZHU
Abstract: The present disclosure relates to a hysteretance component, which is designed based on its definition, calculation formulas, and port characteristics. By increasing or decreasing hysteretance components in a magnetic circuit, the intensity and effect magnitude of magnetic hysteresis in a vector magnetic circuit can be estimated and controlled from the perspective of magnetic circuit, allowing the vector state of a magnetic flux to be consistent with the desired state. Based on this, an application method is proposed, involving that a target magnetic circuit is formed by connecting reluctance, magductance, and hysteretance components in series, and magnetic circuit parameters of the three components are utilized to quantitatively express magnetization, eddy current, and magnetic hysteresis phenomena, enabling technicians to selectively alter the operating characteristics of the magnetic circuit, vector magnetic quantities, and power of the magnetic circuit by adjusting the parameters.
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公开(公告)号：US20240223046A1
公开(公告)日：2024-07-04
申请号：US17921006
申请日：2022-06-30
Applicant: SOUTHEAST UNIVERSITY
Inventor： Wei HUA , Zhiheng ZHANG , Wenfei YU , Peixin WANG
Abstract: A stator structure of a magnetic levitation flux-switching motor includes a stator of a modular structure and a motor housing. A modular stator includes front and rear side winding end heat dissipation modules, modular stator left and right wings, a modular stator permanent magnet, front side magnetic conduction column left and right wings, an inter-front side and inter-rear side magnetic conduction column permanent magnets, insulating layers, a stator winding, and rear side magnetic conduction column right and left wings. The front side and rear side winding end heat dissipation modules are of hollow structures, and are symmetrically provided with a cooling medium inlet and a cooling medium outlet, a cooling medium channel is disposed inside a hollow cavity, one side of the heat dissipation module is a smooth curved surface, and good thermal contact can be achieved between the heat dissipation module and the stator winding and the insulating layer.
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公开(公告)号：US20240395454A1
公开(公告)日：2024-11-28
申请号：US18261957
申请日：2023-02-14
Applicant: Southeast University
Inventor： Ming CHENG , Wei QIN , Xinkai ZHU , Wei HUA , Zheng WANG , Sa ZHU , Zhiyuan XU
Abstract: According to a magnetic core considering the skin effect of magnetic flux and a design method thereof, with a cross-section of a magnetic core through which magnetic flux flows as a reference surface, the shape of the cross-section of the magnetic core is designed according to the electromagnetic characteristics, temperature characteristics, magnetic flux amplitude and operating frequency of the magnetic core, and a closed or discontinuous air path is formed inside the magnetic core by stretching the reference surface along the path of the magnetic flux, thereby forming a magnetic core having a duct structure. When a high-frequency magnetic flux is introduced into the magnetic core, the magnetic core considering the skin effect of magnetic flux and the design method thereof can reduce the weight of the magnetic core, reduce the power loss and temperature rise of the magnetic core, and suppress the skin effect of the magnetic core.
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公开(公告)号：US20190260247A1
公开(公告)日：2019-08-22
申请号：US16345734
申请日：2016-11-11
Applicant: SOUTHEAST UNIVERSITY
Inventor： Wei HUA , Hengliang ZHANG , Ming CHENG
Abstract: A magnetic flux switching hub motor having a permanent magnet rotor, comprising: a wheel rim, a stator core, an armature winding which is wound on the stator core, and a plurality of rotor units, wherein rotor units are fixed inside the wheel rim, and a rotor unit comprises a permanent magnet and rotor cores which are arranged on two sides of the permanent magnet, the magnetization direction of the permanent magnet being tangential magnetization, and a magnetization direction of each permanent magnet being the same. The motor has the advantages of being high power, and having strong saturation and overload resistance, high reluctance torque, good flux-weakening performance, a broad speed regulation range, a high degree of manufacturing integration, suitability for modular manufacturing processes, and the like.
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公开(公告)号：US20240030838A1
公开(公告)日：2024-01-25
申请号：US18249533
申请日：2022-07-27
Applicant: SOUTHEAST UNIVERSITY
Inventor： Ming CHENG , Wei QIN , Xinkai ZHU , Zheng WANG , Wei HUA
IPC: H02N11/00
CPC classification number: H02N11/002
Abstract: A power generation device and method based on the time-varying magductance principle relate to the field of energy conversion, and in particular relate to an electromagnetic induction power generation device. The power generation device includes an electric energy generation unit, a power conversion unit and an electric energy storage unit. The electric energy generation unit includes a time-varying magductance component configured to form a closed conductor loop in a magnetic circuit with constant magnetic flux. By changing a magductance parameter of the time-varying magductance component, the time-varying magductance component generates induced current. The power conversion unit consists of a switching device and a circuit. The electric energy generated by the time-varying magductance component can be stored into the electric energy storage unit through controlling the switching device. The time-varying magductance power generation device provided by the present invention provides a new way for electric energy generation.
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Patent Agency Ranking
公开(公告)号：US20220373027A1
公开(公告)日：2022-11-24
申请号：US17770226
申请日：2021-11-29
Applicant: SOUTHEAST UNIVERSITY
Inventor： Wei HUA , Zhiheng ZHANG , Qifan XU
Abstract: The present invention discloses a magnetic bearing of a stator permanent magnet motor with magnetic pole bypasses and a bias force adjusting method thereof, and belongs to the technical field of power generation, power transformation or power distribution. A typical magnetic field loop formed by permanent magnets extending out of stator sections, radial magnetic conduction bridges, circumferential magnetic conduction bridges, magnetic collecting shoes, radial/axial working air gaps and magnetic conduction blocks of radial/axial magnetic field closed main loops is used for designing the magnetic pole bypasses, so as to achieve the distribution of the magnetic field energy with multiple paths and controllable magnetic field strength of the permanent magnets in the stator permanent magnet motor. The present invention further provides a bias magnetic circuit structure. The number of magnetic poles and the magnetic field strength of a bias magnetic field are adjusted by selecting the materials of connecting sections between magnetic collecting blocks and the volume embedded in adjacent magnetic collecting blocks, so as to adjust the bias force of the magnetic pole, the space at an end of a motor winding is used to the greatest extent, the axial length of a magnetic suspension bearing motor system is reduced, the dynamic performance of a rotor is improved, and the objectives of high compactness and high integration level of “a magnetic suspension bearing and a permanent magnet motor system” are achieved.
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7.发明公开公开(公告)号：US20240204638A1
公开(公告)日：2024-06-20
申请号：US18279391
申请日：2021-11-29
Applicant: SOUTHEAST UNIVERSITY
Inventor： Wei HUA , Yuchen WANG , Kai LIU , Chao ZHANG
IPC: H02K29/08 , H02K11/215 , H02P21/18
CPC classification number: H02K29/08 , H02K11/215 , H02P21/18
Abstract: Disclosed are a method and system for measuring a flux-switching electric motor rotor angle on the basis of linear Hall. The method comprises: firstly, selecting four linear Hall sensors and respectively mounting same in four slots of a stator; a first linear Hall sensor is mounted in any slot of the stator, and a second linear Hall sensor is spaced apart from the first linear Hall sensor by N1 slots in a unified direction; N1 is an even number, and N1≠ks/(2p); a third linear Hall sensor is spaced apart from the first linear Hall sensor by N2 slots; N2 is an odd number, and N2=(2k−1)s/(2p); and a fourth linear Hall sensor is spaced apart from the second linear Hall sensor by N2 slots; and then calculating an electric motor rotor angle according to voltage signals of the four linear Hall sensors.
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8.发明公开公开(公告)号：US20240183649A1
公开(公告)日：2024-06-06
申请号：US18279211
申请日：2021-11-29
Applicant: SOUTHEAST UNIVERSITY
Inventor： Wei HUA , Yuchen WANG , Chao ZHANG , Kai LIU
CPC classification number: G01B7/312 , G01R33/072
Abstract: A linear Hall-based eccentricity diagnosis method and detection system for a permanent magnet motor. First, three linear Hall elements are mounted in stator slots at the same space interval, respectively; second, analog signals output by the three-phase linear Hall are converted into digital signals by means of a digital signal processor, and the digital signals are converted into a quadrature signal by means of linear combination; then, a negative sequence signal and a sideband signal are extracted from the quadrature signal by means of a complex factor filter; then the amplitude of the negative sequence signal and the amplitude of the sideband signal are extracted by means of synchronous reference frame phase-locked loops as a static eccentricity indicator and a dynamic eccentricity indicator; finally, percentages representing the degrees of eccentricity are calculated from the static eccentricity indicator and the dynamic eccentricity indicator in the digital signal processor.
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9.发明公开公开(公告)号：US20230155449A1
公开(公告)日：2023-05-18
申请号：US17771495
申请日：2021-11-29
Applicant: SOUTHEAST UNIVERSITY
Inventor： Wei HUA , Zhiheng ZHANG , Qifan XU
CPC classification number: H02K7/09 , F16C32/0465
Abstract: A force-balancing magnetic bearing with an adjustable bias magnetic field for a stator permanent magnet motor is provided. The force-balancing magnetic bearing includes four permanent magnetic poles and four electromagnetic poles, wherein a magnetic field energy of the four permanent magnetic poles is sourced from a stator permanent magnet of the stator permanent magnet motor, each permanent magnetic pole is formed by a left permanent-magnet magnetic bridge, a right permanent-magnet magnetic bridge, a magnetic adjusting section, an electromagnetic pole stator, an electromagnetic pole and permanent magnetic pole isolation plate, a permanent-magnet two-side magnetic pole connection section, a left permanent-magnet magnetic pole and a right permanent-magnet magnetic pole, a magnetic flux of each permanent magnetic pole is adjusted by the magnetic adjusting section, and the four electromagnetic poles are adjusted by currents introduced into electromagnetic pole winding coils.
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公开(公告)号：US20210359587A1
公开(公告)日：2021-11-18
申请号：US16979536
申请日：2020-02-27
Applicant: SOUTHEAST UNIVERSITY
Inventor： Wei HUA , Peixin WANG , Gan ZHANG , Baoan WANG , Ming CHENG
Abstract: A coaxial double-rotor variable-speed electromagnetic drive includes an external rotor, an end cover, a load shaft, a stator, and an internal rotor, the external rotor, the load shaft, the stator, and the internal rotor being coaxially arranged. The end cover includes a first end cover and a second end cover that are respectively disposed at two ends of the drive, the external rotor is slidably connected to the two end covers separately by bearings, the load shaft is slidably connected to the first end cover and the inner side of the external rotor separately by bearings, the stator is fixed on the inner side of the first end cover and disposed inside the external rotor, air gaps are kept separately between the stator and the internal rotor and between the stator and the external rotor, the internal rotor is sleeved on the load shaft and is disposed inside the stator.
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