Results 31 to 40 of about 22,831 (243)
Analytical Modeling and Analysis of Permanent-Magnet Motor with Demagnetization Fault
Sensors, 2022 Factors such as insufficient heat dissipation and excessively high temperature can easily lead to demagnetization of the PMs in permanent-magnet (PM) motors.
Cenwei Shi +3 more
doaj +1 more source
IEEE transactions on energy conversion, 2021 Partial demagnetization is a condition that may occur in Permanent Magnet machines due to overloading or thermal stress. Whenthis happens, the magnetic field locally weakens leading to an asymmetry of the air-gap field.
K. Gyftakis +3 more
semanticscholar +1 more source
Demagnetization research on PMs in the Halbach magnetized pulsed alternator
CES Transactions on Electrical Machines and Systems, 2019 Demagnetization behavior of Halbach magnetized compensated pulsed alternator (CPA) is studied by using finite element method (FEM) under the different demagnetization factors in this paper.
Songlin Wu +3 more
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Disambiguation of Uniform Demagnetization Fault From Position Sensor Fault in FOC PMSM Applications
IEEE Access, 2022 Electrification of higher torque density applications in the transportation sector and robotics sector are primarily met with permanent magnet synchronous machines (PMSMs), attributing to their unique properties.
Sandun S. Kuruppu, Sunil G. Abeyratne
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On-Line Detection of Demagnetization for Permanent Magnet Synchronous Motor via Flux Observer
Machines, 2022 Demagnetization in permanent magnet synchronous motor (PMSM), caused by high temperature or inverse magnetic field, may increase loss and torque ripple, and even degrade the system stability in severe cases.
Liqian Cao, Zhong Wu
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Estimating the demagnetization factors for regular permanent magnet pieces
AIP Advances, 2021 In this paper, methods for finding the demagnetization factor, specifically for permanent magnets, are considered and compared. Widely applied and cited literature expressions are compared to high resolution numerical modeling in order to establish the ...
Christian R.H. Bahl
semanticscholar +1 more source
Fast Demagnetization and Vibration Reduction in Switched Reluctance Motor Drive System
IEEE Access, 2021 In this paper, a Switched Reluctance Motor (SRM) drive system is proposed to make a trade-off between torque profile and vibration amplitude. In the proposed drive system, the power factor correction and fast demagnetization are achieved using a single ...
Zahra Sadeghi +3 more
doaj +1 more source
IEEE transactions on energy conversion, 2021 For the analysis of the process of partial demagnetization of permanent magnets (PMs) in electric machines, a field model of coupled electromagnetic and thermal phenomena was proposed.
Mariusz Baranski +2 more
semanticscholar +1 more source
Elektrotehnìka ta Elektroenergetika, 2019 Purpose. Obtaining analytical calculated dependencies for finding the optimal time of magnetization and demagnetization of stopped frequency-regulated synchronous motors and the corresponding minimum energy loss in these motors for the regimes of ...
V.A. Volkov
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Atomically Resolved Acoustic Dynamics Coupled with Magnetic Order in a Van der Waals Antiferromagnet. [PDF]
Adv MaterMagnetically coupled acoustic phonon modes (f1, f2, f3) are captured by ultrafast X‐ray diffraction in a prototypical van der Waals antiferromagnet FePS3, including their atomic displacement vectors (u) and the acoustic propagation wave vectors (k). Notably, the atomic displacement vector and amplitude of these modes, represented by the direction and ...
Zhou F +24 more
europepmc +2 more sources