Results 21 to 30 of about 1,676 (174)

Internal Flow Field and Loss Analysis of a Magnetic Drive Pump’s Cooling Circuit

Energies, 2023
The cooling circuit is an important component of the magnetic drive pump because it prevents demagnetization of the permanent magnet and damage to the containment shell owing to a high temperature increase. In this paper, the flow field and losses of the
Zhenfa Xu, Fanyu Kong, Kun Zhang, Yinfeng Wang, Jiaqiong Wang, Ning Qiu   +5 more
doaj   +1 more source

Longitudinal evolution of magnetization of ferromagnets following ultrafast demagnetization: Role of finite size and shape of demagnetized region

Condensed Matter Physics, 2014
A dependence of a relaxation rate on the shape of the demagnetized region for a longitudinal evolution of total magnetization to its equilibrium value following the ultrafast demagnetization is demonstrated. This shape-dependence is caused by a motion of
I.A. Yastremsky
doaj   +1 more source

Structural Design of Demagnetization Detection Robot in Oil and Gas Pipeline

Shiyou jixie, 2020
The oil and gas pipelines in service will produce certain residual magnetism due to the influence of various factors. To quickly and efficiently eliminate the residual magnetism, according to the theory of dynamic demagnetization of permanent magnets, a ...
Jia Shihao, Zhao Hong
doaj  

Closed-Loop Magnetization State Control for a Variable-Flux Memory Machine

IEEE Access, 2020
Variable flux memory machines (VFMM) use magnetization and demagnetization manipulations to adjust machine voltage, achieving wide-speed high-efficiency operation.
Yusheng Hu, Junhua Chen, Ronghai Qu, Bin Chen, Yong Xiao, Xia Li   +5 more
doaj   +1 more source

Demagnetization Analysis of Interior Permanent Magnet Synchronous Motors Under Realistic Vehicle Driving Conditions

IEEE Access
Electric vehicles primarily use interior permanent magnet synchronous motors (IPMSMs) as traction motors. Although IPMSMs are powerful and efficient, their neodymium-based permanent magnets are susceptible to demagnetization under high-temperature ...
Yun-Jin Yang, Dae-Han Kim, Yong-Min You
doaj   +1 more source

Electrodeposition and Properties of Copper Layer on NdFeB Device

Cailiao gongcheng, 2017
To decrease the impact of the regular Ni/Cu/Ni coating on the magnetic performance of sintered NdFeB device, alkaline system of HEDP complexing agent was applied to directly electro-deposit copper layer on NdFeB matrix, then nickel layer was ...
LI Yue, ZHU Li-qun, LI Wei-ping, LIU Hui-cong, NAN Hai-yang   +4 more
doaj   +1 more source

Slight Truncation Changes in Iron Oxide Nanocubes Strongly Affect Their Magnetic Properties

Advanced Functional Materials, EarlyView.
Subtle variations in nanoparticle morphology can lead to significant changes in functional properties. An automated shape‐fitting method captures minor differences in corner truncation between iron oxide nanocubes of similar sizes synthesized under identical conditions, revealing pronounced disparities in their magnetic and hyperthermia behavior ...
Kingsley Poon, Raúl López‐Martín, Verner Håkonsen, Nader Yaacoub, Francisco J. Terán, Alberto López Ortega, Jose A. De Toro, Gurvinder Singh   +7 more
wiley   +1 more source

Integrated Field‐Free SOT Domain‐Wall Synapses and MTJ Stochastic Neurons for Hardware Boltzmann Machines

Advanced Functional Materials, EarlyView.
Field‐free spin‐orbit torque domain‐wall synapses integrated with stochastic MTJ neurons enable compact hardware Boltzmann machines. Leveraging intrinsic stochasticity and multi‐level conductance, the system achieves efficient probabilistic learning with high accuracy, demonstrating a scalable spintronic platform for energy‐efficient edge AI.
Aijaz H. Lone, Meng Tang, Camelia Florica, Bin He, Jingkai Xu, Selma Amara, Georgian Melinte, Xixiang Zhang, Gianluca Setti   +8 more
wiley   +1 more source

Fault-Tolerant Redesign of a Quad-Winding PMSM to Prevent Irreversible Partial Demagnetization

Actuators
This paper proposes a fault-tolerant optimal design method for quad-winding permanent magnet synchronous motors (PMSMs) considering irreversible demagnetization under fault conditions.
Min-Seong Jo, Young-Joon Song, Kyung-il Woo, Kyu-Yun Hwang   +3 more
doaj   +1 more source

Outer rotor eddy current heater for wind turbines

Renewable Energy and Environmental Sustainability, 2016
This paper proposes a conversion system of wind energy into thermal energy by means of an outer rotor permanent magnet eddy current heater. The main advantages of this device are the following: compactness, easy temperature control by water flow rate ...
Tudorache Tiberiu, Melcescu Leonard
doaj   +1 more source