Results 21 to 30 of about 428 (171)
International Transactions on Electrical Energy Systems, 2023 This paper investigates the irreversible demagnetization (ID) of a large capacity line-start permanent magnet synchronous motor (LSPMSM) considering influence of permanent magnets’ (PMs) temperature.
Dongming Li +7 more
doaj +1 more source
IEEE Access, 2021 Interior permanent-magnet synchronous machines (IPMSMs) have the advantages of high efficiency, high power density and outstanding flux-weakening ability, which make them widely adopted in electric vehicles (EVs).
Mingqiao Wang +4 more
doaj +1 more source
AIP Advances, 2016 In this paper, the recoil loops of SmCo6.6Nb0.4 nanoflakes prepared by the surfactant-assisted high energy ball milling (SA-HEBM) were systematically studied. The recoil loop openness was observed in both the aligned and non-aligned samples.
Y. Q. Li +5 more
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Angewandte Chemie, Volume 138, Issue 24, 8 June 2026.Lithium‐sulfur (Li‐S) batteries contain various NMR‐active nuclear isotopes, including 7Li, 6Li and 33S, which are sensitive to the different chemical reactions that occur during battery cycling. Herein, we use a combination of lithium and sulfur operando NMR spectroscopy to provide new insights at the molecular level, fundamental understanding being ...
Jana B. Fritzke +7 more
wiley +2 more sources
Applied Sciences, 2023 Due to the high cost and the predicted shortage of rare earth elements in the near future, the task of developing energy-efficient electric machines without rare earth magnets is of great importance.
Vladimir Dmitrievskii +2 more
doaj +1 more source
AIP Advances, 2017 In this paper, the partitioned rotor flux switching permanent magnet machine with ferrite permanent magnet is proposed. By the adoption of the partitioned rotor configuration, the stator flux leakage is eliminated and the permanent magnet utilization is ...
Deyang Fan +4 more
doaj +1 more source
Coupled Electromagnetic–Thermal Modelling of Dynamic Performance for Modular SPM Machines
Energies, 2023 This paper presents coupled electromagnetic (EM)–thermal modelling of the steady-state dynamic performances, such as torque speed curve and the efficiency map, for surface-mounted permanent magnet machines.
Wei Zhang +4 more
doaj +1 more source
Sensors, 2014 To prevent irreversible demagnetization of a permanent magnet (PM) for interior permanent magnet synchronous motors (IPMSMs) by flux-weakening control, a robust PM flux-linkage nonsingular fast terminal-sliding-mode observer (NFTSMO) is proposed to ...
Kai-Hui Zhao +4 more
doaj +1 more source
The Rotor Barrier Design of the BLDC Motor Consider that Irreversible Demagnetization of Permanent Magnets [PDF]
The Transactions of The Korean Institute of Electrical Engineers, 2014 일반적으로, 차량내부에서 사용되는 전동기는 높은 주변 환경 온도, 빈번한 구동ㆍ정지에 의한 기동전류 및 큰 진동에 항상 노출되어 있다. 그러므로 본 논문에서는 유한요소해석을 이용하여 BLDCM의 기동 전류를 고려한 영구자석의 국부적인 감자해석 및 감자 내력을 향상시키는 회전자 형상 설계를 수행하였다. 결과적으로, 큰 기동 전류에 의해 기본 모델의 영구자석 끝단에 국부적인 불가역 감자가 발생하였으며, 이를 해결하기 위해 철심의 자로를 제한하는 자속 장벽을 설치하여 감자 내력 향상은 물론 구동 특성을 향상하였다.
Cheol-Min Kim, Gyu-Won Cho, Gyu-Tak Kim
openaire +1 more source
IEEE Access, 2020 Due to poor heat dissipation of rotor, especially in flywheel energy storage system (FESS) for uninterruptible power supply (UPS), there is a higher risk of irreversible demagnetization by rotor temperature rising.
Gengji Wang, Ping Wang, Xiaoyuan Wang
doaj +1 more source