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Accurate Demagnetization Faults Detection of Dual-Sided Permanent Magnet Linear Motor Using Enveloping and Time-Domain Energy Analysis

IEEE Transactions on Industrial Informatics, 2020
In this article, dual-sided permanent magnet linear motors (DPMLM) have been wildly applied in linear motion occasions such as high-precision laser cutting machines. This article researches a new way for accurate demagnetization fault detection of DPMLM,
Juncai Song   +6 more
semanticscholar   +1 more source

Design and Analysis of Interior Permanent Magnet Motor for Electric Vehicle Application Considering Irreversible Demagnetization

International Conference on Electrical Machines, 2020
The design of permanent magnet motors for use in electric vehicle application has different design aspects. In this paper, the conceptual process of designing a permanent magnet electric motor for use in Sedan Low electric vehicle propulsion has been ...
F. Mahmouditabar   +2 more
semanticscholar   +1 more source

An improved equivalent-input-disturbance approach for PMSM drive with demagnetization fault.

ISA transactions, 2020
Closed-loop torque control system of permanent magnet synchronous motor (PMSM) drive is highly applied in industrial applications. However, high temperature and other external factors lead to permanent magnet (PM) demagnetization fault of the motor ...
Gang Huang   +5 more
semanticscholar   +1 more source

Demagnetization Correction Method by Using Inverse Analysis Considering Demagnetizing Field Distribution

IEEE Transactions on Magnetics, 2020
A new demagnetization correction method is explained in this article. Since a magnetization curve in an open magnetic circuit is considerably affected by the demagnetizing field which depends on the shape of the magnetic material, the demagnetization correction is significantly important to evaluate the magnetic properties of magnetic materials. In the
J. Fujisaki   +6 more
openaire   +1 more source

A Study on the Effect of Eddy Current Loss and Demagnetization Characteristics of Magnet Division

IEEE transactions on applied superconductivity, 2020
Permanent magnet motor is used in various fields because of their relatively small size, high power and high efficiency. However, an electric machine performance using permanent magnet can be decreased as temperature, humidity, and magnetic field related
Byung-Chan Kim, Jong-Hun Lee, D. Kang
semanticscholar   +1 more source

The Bayreuth nuclear demagnetization refrigerator

Journal of Low Temperature Physics, 1987
In this letter we report on the construction and operation of the new nuclear refrigerator at the University of Bayreuth. It contains two Cu stages of 103.5 moles in 8 Tesla and 2 moles in 9 Tesla, respectively. After demagnetization the first stage has cooled a Pt-NMR thermometer in the field free experimental region to 15 µK.
P. Smeibidl   +6 more
openaire   +1 more source

Power transformer demagnetization

2016 IEEE 36th Central American and Panama Convention (CONCAPAN XXXVI), 2016
Switching operations and direct current applied during routine testing procedures of static winding resistance measurement leave residual magnetization in the core and/or fully saturate the core of the transformer.
openaire   +1 more source

Demagnetization Fault Detection for Double-Sided Permanent Magnet Linear Motor Based on Three-Line Magnetic Signal Signature Analysis

IEEE/ASME transactions on mechatronics, 2020
This article investigates a novel demagnetization fault detection method for double-sided permanent magnet synchronous linear motors (DS-PMSLM) that are applied in laser cutting machines.
Juncai Song   +4 more
semanticscholar   +1 more source

An Improved Operating Room Demagnetizer

Archives of Ophthalmology, 1977
An operating room demagnetizer that utilized a pulsed, smoothly decaying oscillating magnetic field is described. The instrument can demagnetize a number of surgical instruments at one time and can provide instantaneous and complete demagnetization.
openaire   +2 more sources

Experiments on adiabatic demagnetization

Physica, 1940
Abstract It is found that the temperatures calculated from the magnetic susceptibilities of three different paramagnetic salts are in agreement with the temperature scale of Bleaney and Simon. The Stark splitting of KCr(SO4)2.12H2O. derived from the demagnetization experiments is = 0.263 degrees, that of Cr(NO3)3. H2O δ = 0.283.
H.B.G. Casimir, D. de Klerk, D. Polder
openaire   +1 more source

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