Title :
Modelling and computation of nonlinear magnetic fields in linear step motors by finite element method
Author :
Khan, Sanowar H. ; Ivanov, Anatoly A.
Author_Institution :
Dept. of Electr. Electron. & Inf. Eng., City Univ., London, UK
fDate :
11/1/1994 12:00:00 AM
Abstract :
This paper describes the implementation of finite element method (FEM) for modelling and computation of magnetic fields in cylindrical passive armature linear step motors (LSM) used in control rod drives of nuclear reactors. The 2D nonlinear axisymmetric magnetic field is simulated using dedicated finite element (FE) package developed for CAD and performance evaluation of such motors. Various aspects of FE modelling in complex geometry of LSM are discussed. Results are presented in terms of field plots and electromagnetic force versus armature position curves (static characteristics) of the industrial prototype of a LSM. Some of the results are compared with experimental data which show satisfactory agreement
Keywords :
electric machine CAD; finite element analysis; fission reactor core control; linear motors; magnetic fields; stepping motors; 2D nonlinear axisymmetric magnetic field; CAD evaluation; armature position curves; complex geometry; control rod drives; cylindrical passive armature motors; electromagnetic force; field plots; finite element method; industrial prototype; linear step motors; modelling; nonlinear magnetic fields; nuclear reactors; performance evaluation; static characteristics; Armature; Computational modeling; Electromagnetic forces; Finite element methods; Geometry; Magnetic fields; Nonlinear magnetics; Packaging; Prototypes; Solid modeling;
Journal_Title :
Magnetics, IEEE Transactions on
