Results 21 to 30 of about 3,593 (213)
Ultrafast demagnetization at high temperatures [PDF]
Journal of Physics: Condensed Matter, 2018 Abstract Time-resolved pump-probe measurements were made at variable heat accumulation in Co/Pd superlattices. Heat accumulation increases the baseline temperature and decreases the equilibrium magnetization. Transient ultrafast demagnetization first develops with higher fluence in parallel with strong equilibrium thermal spin ...
F Hoveyda +3 more
openaire +3 more sources
Demagnetization Fault Diagnosis of a PMSM Using Auto-Encoder and K-Means Clustering
Energies, 2020 In recent years, many motor fault diagnosis methods have been proposed by analyzing vibration, sound, electrical signals, etc. To detect motor fault without additional sensors, in this study, we developed a fault diagnosis methodology using the signals ...
Lien-Kai Chang +2 more
doaj +1 more source
Applied Sciences, 2021 The irreversible demagnetization of permanent magnets causes the deterioration of the performance in permanent magnet synchronous motors (PMSMs), which are used for electric vehicles.
Yong-min You, Keun-young Yoon
doaj +1 more source
Advanced Functional Materials, EarlyView.A printed superparamagnetic nanoparticle‐based flux guide enables the realization of a hysteresis‐free three‐axis magnetic sensor. This innovative architecture efficiently redirects out‐of‐plane fields to planar sensing elements, facilitating simultaneous vector detection without complex reset protocols.
Changyeop Jeon +10 more
wiley +1 more source
World Electric Vehicle JournalInterior permanent magnet synchronous motor (IPMSM) has advantages with high power density, wide speed range, small size, and high efficiency, and is widely used in the drive system of electric vehicles.
Lianbo Niu, Xiuchao Li, Zhiqiang Xi
doaj +1 more source
Elektrotehnìka ta Elektroenergetika, 2018 Purpose. Obtaining analytical dependencies for calculating the extreme (minimum) values of the main electrical energy losses of a three-phase short-circuited asynchronous engine in the regimes of its magnetization and demagnetization and determining the ...
V.A. Volkov
doaj +1 more source
Ultrawide Bandwidth Optomechanical Magnetometry Using Flux Concentration
Advanced Functional Materials, EarlyView.High‐permeability flux concentrators enable ultrawide‐bandwidth chip‐scale optomechanical magnetometry by exploiting magnetic nonlinearity to up‐convert low‐frequency fields to the mechanical resonance, where sensitivity is optimal. This enables flat wideband operation over more than four orders of magnitude, from tens of kilohertz to sub‐hertz ...
Benjamin J. Carey +6 more
wiley +1 more source
Experimental Study on Magnetization and Demagnetization Characteristics of X70 Steel Pipe
Shiyou jixie, 2022 The remanence in the pipe not only affects the detection accuracy, but also accelerates the corrosion rate in the pipe. In order to study the magnetization and demagnetization characteristics of X70 steel pipe, based on the analysis of material ...
Song Fulin, Zhao Hong
doaj
Optimal Design of Spoke-Type IPM Motor Allowing Irreversible Demagnetization to Minimize PM Weight
IEEE Access, 2021 In this study, we introduce an optimal design for a spoke-type interior permanent magnet (IPM) motor that can minimize PM weight by allowing irreversible demagnetization, unlike the conventional motor design method that does not allow irreversible ...
Keun-Young Yoon, Kyu-Yun Hwang
doaj +1 more source
Self‐Cooling Molecular Spin Qudits
Advanced Materials, EarlyView.A material made of [GdEr] molecular dimers can encode a qudit and perform as a magnetic refrigerant. Microwave resonant pulses coherently manipulate its 16 spin states, while direct demagnetization measurements cool the material and a device down to temperatures below 1 K.
Elías Palacios +12 more
wiley +1 more source