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journal article·2023-02-01Open access

Analysis of flux barrier effect of LCF PM in series hybrid magnet variable flux memory machine

Yunrui Huang, Hui Yang, Hao Zheng, Heyun Lin, Z. Q. Zhu

AIP Advances· Volume 13· Issue 2
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Source abstract

Abstract

Variable flux memory machines (VFMMs) with series hybrid magnets using both low coercive force (LCF) and high coercive force (HCF) permanent magnets (PMs) have been recognized as a viable candidate for wide-speed-range industrial applications due to the advantages of high torque density and wide speed range. Nevertheless, the adverse effects of LCF PM on the HCF PM in series-type VFMM under different magnetization states (MSs) are still unreported. In this paper, the flux barrier effect (FBE) of the LCF PM existing in series hybrid magnet VFMM is first revealed, and its causes are discussed as well as analyzed in depth on the basis of the equivalent magnetic circuit method and finite-element (FE) analyses. A topology of VFMM with dual-layer PMs is further developed to alleviate the FBE induced from LCF PMs. It can be found that the FBE can be effectively suppressed by employing the dual-layer (DL) PM arrangement and additional leakage flux paths. A prototype of the proposed design is built, and the theoretical and FE results are experimentally verified.
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Research context

OpenAlex topics: Electric Motor Design and Analysis · Magnetic Bearings and Levitation Dynamics

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Electrical Engineering, Southeast University 1 , Sipailou 2, 210096 Nanjing, China

Suzhou Research Institute, Southeast University 2 , Linquan Street 339, 215000 Suzhou, China

Department of Electronic and Electrical Engineering, The University of Sheffield 3 , S1 3JD Sheffield, United Kingdom

Funding

National Natural Science Foundation of China · Jiangsu Provincial Key Research and Development Program · Fundamental Research Funds for Central Universities of the Central South University · High-end Foreign Experts Recruitment Plan of China · Qinglan Project of Jiangsu Province of China · GF Key Laboratory of Science and Technology Foundation Project · “Thousand Talents Plan” Project of Jiangxi Province · “SEU Zhishan scholars” Program of Southeast University · the Excellence Project Funds of Southeast University

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