Results 81 to 90 of about 3,049,338 (225)

Research on the Remanence Measurement Method of Transformers Based on the Degaussing Hysteresis Loop

Applied Sciences
The residual magnetism of the iron core of power transformers can cause an excitation inrush current, posing a threat to the safe and stable operation of the power grid.
Dingyuan Li, Jing Zhou, Zhanlong Zhang, Yu Yang, Zijian Dong, Wenhao He, Xichen Pei, Jiatai Gao, Siyang Chen, Zhicheng Pan   +9 more
doaj   +1 more source

Design for the Interior Permanent Magnet Synchronous Motor Drive System Based on the Z-Source Inverter

Energies, 2019
The permanent magnet synchronous motor (PMSM) running above the base speed requires flux-weakening control, which is usually realized by the direct-axis demagnetization current generated by the vector control, thus leading to a decrease in the system ...
Shuai Dong, Qianfan Zhang, Hongwei Ma, Rui Wang   +3 more
doaj   +1 more source

Physics-Informed Neural Network Approach to Diagnosing Uniform Demagnetization Faults in Permanent Magnet Synchronous Machines

IEEE Access
Permanent Magnet (PM) Demagnetization (PMD) faults in Permanent Magnet Synchronous Machines (PMSMs) pose significant challenges to their reliability and performance, necessitating advanced diagnostic techniques for early detection to prevent catastrophic
Ehsan Mazaheri-Tehrani, Jawad Faiz, Shiva Garaei, Ahmad Kalhor, Chunyan Lai   +4 more
doaj   +1 more source

Interfacial Asymmetry and Surface Roughness Enhanced Topological‐Hall‐Like Transport in SRO/BTO/SRO Trilayers

Advanced Science, EarlyView.
Trilayer oxide architecture introduces interfacial asymmetry and surface roughness in SRO/BTO/SRO heterostructures, creating a locally modulated polar and magnetic landscape. This design enhances the topological‐Hall‐like response, achieving a broad 5–90 K stability window and a maximum ρTHE of 0.8 µΩ cm, demonstrating an effective route to amplify ...
Sagar E. Shirsath, Yunlong Sun, Xichao Zhang, Ji Zhang, Akash V. Fulari, Zizheng Song, Yee Yan Tay, Yin Yao, Zibin Chen, Sean Li, Xiaoxi Liu, Danyang Wang   +11 more
wiley   +1 more source

Thermal-demagnetization-enhanced hybrid fiber-based thermometer coupled with nitrogen-vacancy centers

, 2019
Nitrogen-vacancy centers in diamond are attractive as quantum sensors owing to their remarkable optical and spin properties under ambient conditions.
Yang Dong (234336), Yu Zheng (2950), Hao-Bin Lin (17509815), Bo Du (219360), Xiang-Dong Chen (14383899), Guang-Can Guo (1511335), Shao-Chun Zhang (1830937), Shen Li (432920), Guan-Zhong Wang (17509818), Wei Zhu (23646), Bo-Wen Zhao (588274), Fang-Wen Sun (1235409)   +11 more
core   +1 more source

Cascaded Robust Fault-Tolerant Predictive Control for PMSM Drives

Energies, 2018
This paper presents a cascaded robust fault-tolerant predictive control (CRFTPC) strategy with integral terminal sliding mode observer (IT-SMO) to achieve high performance speed loop and current loop for permanent magnet synchronous motor (PMSM) drives ...
Fang Hu, Derong Luo, Chengwei Luo, Zhuo Long, Gongping Wu   +4 more
doaj   +1 more source

Skyrmion Bubbles by Design in a Centrosymmetric Kagome Magnet

Advanced Science, EarlyView.
Chemical tuning of magnetocrystalline anisotropy in the centrosymmetric kagome magnet TmMn6Sn6 is shown to drive a spin reorientation transition via an intermediate magnetic fan state and to stabilize an emergent skyrmion bubble lattice. Four‐dimensional cryogenic Lorentz scanning transmission electron microscopy confirms the nanoscale texture ...
Mohamed El Gazzah, Fehmi Sami Yasin, Sk Jamaluddin, Hari Bhandari, Resham Babu Regmi, Xiuzhen Yu, Nirmal J. Ghimire   +6 more
wiley   +1 more source

Ultrafast magnetization enhancement via the dynamic spin-filter effect of type-II Weyl nodes in a kagome ferromagnet

Nature Communications
The magnetic type-II Weyl semimetal (MWSM) Co3Sn2S2 has recently been found to host a variety of remarkable phenomena including surface Fermi-arcs, giant anomalous Hall effect, and negative flat band magnetism.
Xianyang Lu, Zhiyong Lin, Hanqi Pi, Tan Zhang, Guanqi Li, Yuting Gong, Yu Yan, Xuezhong Ruan, Yao Li, Hui Zhang, Lin Li, Liang He, Jing Wu, Rong Zhang, Hongming Weng, Changgan Zeng, Yongbing Xu   +16 more
doaj   +1 more source

One-way thermomagnetic simulation of magnetic coupling in natural gas pressure energy utilization

Engineering Applications of Computational Fluid Mechanics
Magnetic coupling is an approach employed to prevent gas leakage by transforming the dynamic seal into a non-contact static seal for the recovery of natural gas pressure energy.
Yanqin Mao, Liang Cai, Roman Chertovskih, Wanjun Guo, Xiaoyue Wang   +4 more
doaj   +1 more source

Broadening Hard‐Magnet Discovery Beyond Symmetry Constraints via Unified Effective Anisotropy [PDF]

Advanced science
A unified effective‐anisotropy descriptor (Keff) extends hard‐magnet screening across all seven crystal systems, beyond the uniaxial restriction of conventional searches. Machine‐learning screening of 9320 known ferromagnets and diffusion‐model generation together yield 38 rare‐earth‐free or ‐lean candidates with DFT‐validated magnetic hardness (κ > 1),
Kim H, Shin H, Nam K, Noh S, Kim D, Jung Y.   +5 more
europepmc   +2 more sources