Results 121 to 130 of about 432 (170)

Irreversible adiabatic demagnetization: Entropy and discrimination of a model stochastic process

Journal of Statistical Physics, 1975
A recently proposed evaluation of irreversible entropy changes with the help of model stochastic processes is applied to the demagnetization of an isolated square Ising lattice. A stochastic process (executed with a computer) causes an initially magnetized lattice to undergo an adiabatic demagnetization, with no external work, by flipping the spin's ...
Alexandrowicz Z, Z Alexandrowicz
exaly   +2 more sources

Dynamic characteristic analysis of irreversible demagnetization in SPM- and IPM- type BLDC motors

IEEE Transactions on Industry Applications, 2015
In this study, we developed an algorithm for the dynamic characteristic analysis of irreversible demagnetization. The conventional static characteristic analysis of irreversible demagnetization considers only d-axis magnetic flux components. However, the accuracy of this method is limited in its analysis of irreversible demagnetization characteristics ...
Jin Hur, Hyung-Kyu Kim
exaly   +2 more sources

Fault Detection of Irreversible Demagnetization Based on Space Harmonics According to Equivalent Magnetizing Distribution

IEEE Transactions on Magnetics, 2015
Efficiency, stability and reliability of interior permanent magnet (IPM) type brushless DC motor(BLDCM) are verified through a number of studies and experiment until today. In addition, IPM type BLDCM is widely used in many applications for high power and excellent control of the per unit volume.
Jin Hur, Hyung-Kyu Kim
exaly   +4 more sources

Optimization Design of PMSM With Hybrid-Type Permanent Magnet Considering Irreversible Demagnetization

IEEE Transactions on Magnetics, 2017
This paper proposes optimization design of permanent-magnet synchronous motor (PMSM) using hybrid-type permanent magnet (PM) considering irreversible demagnetization. Here, the hybrid-type PM is defined as using both of neodymium PM (Nd-PM) and ferrite PM (Fe-PM) in a rotor.
Jin Hur, Chae-Lim Jeong
exaly   +2 more sources

Magnetic Field Analysis of Irreversible Demagnetization in Brushless DC Motor According to the Dynamic and Static Characteristic

IEEE Transactions on Magnetics, 2015
Permanent magnet (PM) brushless direct current (BLDC) motors are widely used in industrial application such as electric vehicles, robot, and home appliances because the PM BLDC motors have potential to be small size due to their high energy density, performance and efficiency. On the other hand, the PM BLDC motors have disadvantages caused by using the
Jin Hur, Hyung-Kyu Kim
exaly   +2 more sources

Irreversible Demagnetization of Permanent Magnet in a Surface-Mounted Permanent Magnet Motor With Overhang Structure

IEEE Transactions on Magnetics, 2016
The overhang structure is an effective solution to increase the performance of a surface-mounted permanent magnet (SPM) motor using a ferrite PM. If a ferrite PM, which can be demagnetized through a large armature reaction, is used for an SPM motor controlled by the field-weakening method, the ferrite PM can suffer from irreversible demagnetization ...
Dong-Kyun Woo
exaly   +2 more sources

A Method to Compute the Irreversible Demagnetization Temperature in Permanent Magnets

2023 International Symposium on Electromobility (ISEM), 2023
Permanent magnets (PM) containing rare earth elements are critical in developing traction drives for electric and hybrid vehicles. The demanding driving conditions heat the PMs and could lead to a degraded vehicle performance if the temperature exceeds the irreversible demagnetization boundary.
Aguilar-Zamorate, Irving S.   +3 more
openaire   +2 more sources

Home - About - Disclaimer - Privacy