A method of approach to transient eddy current problems coupled with voltage sources

Author

Shi, Z.W. ; Rajanathan, C.B.

Author_Institution

Dept. of Electron. & Electr. Eng., Abertay Dundee Univ., UK

Volume

32

Issue

3

fYear

1996

fDate

5/1/1996 12:00:00 AM

Firstpage

1082

Lastpage

1085

Abstract

This paper presents a new method of approach to transient eddy current problems with voltage excitations coupled by indirect methods. In linear cases, the magnetic vector potential is separated into two components to avoid redundant computation and thus hugely reduce the total CPU time. In nonlinear cases, either an elemental time-domain piecewise linearisation method or a Newton iterative method is adopted. A restarting function and second order interpolations are incorporated into an incomplete Choleski conjugate gradient solver to accelerate the convergence. The method is applied to the modelling of a prototype tubular linear induction actuator. Results have shown that the method proposed is very efficient

Keywords

Newton method; asynchronous machines; convergence of numerical methods; eddy currents; electric actuators; interpolation; linear machines; linearisation techniques; magnetic fields; piecewise-linear techniques; time-domain analysis; transient analysis; Newton iterative method; convergence; elemental time-domain piecewise linearisation method; incomplete Choleski conjugate gradient solver; linear cases; magnetic vector potential; nonlinear cases; prototype tubular linear induction actuator; restarting function; second order interpolations; transient eddy current problems; voltage excitations; voltage sources; Acceleration; Convergence; Eddy currents; Interpolation; Iterative methods; Magnetic separation; Prototypes; Time domain analysis; Vectors; Voltage;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.497429

Filename

497429