Sage Journals: Discover world-class research

Abstract

Permanent magnets need to be magnetized with a high magnetic field for retaining their maximum polarization. If the magnetizing field is not sufficiently high, the permanent magnet will not reach its maximum energy product. Additionally, the magnet easily suffers demagnetization because the remanence and coercive field will drop in highly non-linear characteristic. This paper presents an approach which models the local magnetization of permanent magnets during and after impulse magnetization. Common hysteresis models are not capable of modelling the impact of virgin magnetization on demagnetization behavior of permanent magnets. Therefore, measurements suit as interpolation basis for the finite element method.

Keywords

Pulse magnetization permanent magnets virgin magnetization demagnetization curves

Get full access to this article

View all access options for this article.

References

Przybylski

Kapelski

Álusarek

and Wiak

, Impulse Magnetization of Nd-Fe-B Sintered Magnets for Sensors, Hütten A, ed. Sensors (Basel, Switzerland)16(4) (2016), 569.

Dinca

Stöckli

Ramezani

Schwarzer

Cat

Korneluk

and Schäfer

, Characterization of a 7KJ magnetizing pulsed circuit for online quality control of permanent magnets, in: 2015 IEEE Pulsed Power Conference (PPC), Austin, TX, 2015, pp. 1–8.

Kawase

Yamaguchi

Mimura

Igata

and Ida

, Analysis of magnetizing process using discharge current of capacitor by 3-D finite-element method, in IEEE Transactions on Magnetics38(2) (Mar 2002), 1145–1148.

Fiorillo

Beatrice

Bottauscio

and Patroi

, Measuring the Hysteresis Loop of Permanent Magnets With the Pulsed Field Magnetometer, in IEEE Transactions on Magnetics43(7) (July 2007), 3159–3164.

Koh

C.S.

and Hong

S.-K.

, Finite element analysis of magnetizer using Preisach model, in IEEE Transactions on Magnetics35(3) (May 1999), 1227–1230.

Zhang

Kim

H.J.

and Koh

C.S.

, Analysis of Magnetizing Process of a New Anisotropic Bonded NdFeB Permanent Magnet Using FEM Combined With Jiles-Atherton Hysteresis Model, in IEEE Transactions on Magnetics49(5) (May 2013), 2221–2224.

Glehn

Steentjes

and Hameyer

, Algebraic model for hysteresis and anisotropy of hard-magnetic materials modeled by finite element method, in: 21th International Conference on the Computation of Electromagnetic Fields, COMPUMAG 2017.

Hsieh

M.F.

Lien

Y.M.

and Dorrell

D.G.

, Post-Assembly Magnetization of Rare-Earth Fractional-Slot Surface Permanent-Magnet Machines Using a Two-Shot Method, in IEEE Transactions on Industry Applications47(6) (Nov.–Dec. 2011), 2478–2486.

Hsieh

M.F.

Dorrell

D.G.

Lin

C.K.

Chen

P.T.

and Wung

P.Y.P.

, Modeling and Effects of In Situ Magnetization of Isotropic Ferrite Magnet Motors, in IEEE Transactions on Industry Applications50(1) (Jan.–Feb. 2014), 364–374.

10.

Seol

H.S.

Jeong

T.C.

Jun

H.W.

Lee

and Kang

D.W.

, Design of 3-Times Magnetizer and Rotor of Ferrite Spoke-Type PMSM Considering Post-Assembly Magnetization, IEEE Transactions on Magnetics99, 1–1.

11.

Kim

K.S.

Park

M.R.

Kim

H.J.

Chai

S.H.

and Hong

J.P.

, Estimation of Rotor Type Using Ferrite Magnet Considering the Magnetization Process, in IEEE Transactions on Magnetics52(3) (March 2016), 1–4.

12.

Lee

C.K.

and Kwon

B.I.

, Study in the post-assembly magnetization method of permanent magnet motors, International Journal of Applied Electromagnetics and Mechanics20(3,4) (2004), 125–131.

Analysis of impulse-magnetization in rare-earth permanent magnets

Abstract

Keywords

Get full access to this article

References