... are ∂A _z/∂y and ∂A _z/∂x, i.e. the magnetic vector potential A should be approximated quite accurately in the in-plane direction. © Emerald Group Publishing Limited 2013 Higher order FEM Anisotropy Iron core Domain decomposition method Non...

...Prof. Oszkár Bíró, Prof. David A. Lowther and Prof. Piergiorgio Alotto; Anouar Belahcen; Katarzyna Fonteyn; Reijo Kouhia; Paavo Rasilo; Antero Arkkio Purpose – The purpose is to implement and compare different approaches for modelling the magnetostriction phenomenon in iron sheet used in rotating...

... for estimating the minor loop iron losses introduced by static convertors. They compared the proposed model with another analytical model (J. Lavers model) for different wave forms. One can observe that the J. Lavers model overestimates the iron losses introduced by the non‐centred minor loops. Originality...

..., the present work aims to focus on the stochastic modelling of iron losses in electrical machine stators. Design/methodology/approach The investigated samples are composed of 28 slinky stators, coming from the same production chain. The stochastic modelling approach is first described. Thereafter...

... devices made of iron and permanent magnet. Design/methodology/approach Topology optimization methods aim at finding the optimal distribution of some materials in cells subdividing a design space, regarding a specific objective function. This paper suggests to consider that each cell contains...

...Patrick Dular; Maurizio Repetto; A. Belahcen; E. Dlala; K. Fonteyn; M. Belkasim Purpose The purpose of this paper is to find out how to model iron losses in electrical machines accurately and efficiently. Design/methodology/approach The starting point was a previously developed vector...

...Sławomir Wiak; Ewa Napieralska‐Juszczak; S. Jelassi; R. Romary; J.F. Brudny Purpose The aim of this paper is to estimate the iron losses for an induction machine in the healthy case taking the slotting effect into account and to study the effect of an inter‐turn short‐circuit on these losses...

... Electric machines Design and development Iron Magnetism Modelling High‐energy efficiency and power to weight ratio are paramount in the design of modern electromagnetic devices in the ever‐demanding aerospace and automotive sectors. Designers strive to exploit new materials through improved...

...Bo Hu Li; Tianyuan Xiao; Lin Zhang; Zbigniew Gmyrek Purpose The purpose of this paper is to discuss a new method of iron loss estimation under pulse width modulation (PWM) converter supply. The proposed method concerns the longitudinal magnetisation. Design/methodology/approach A novel method...

...S. Wiak; M. Dems; K. Komeza; S. Wiak; T. Stec; M. Kikosicki Purpose To investigate the use of amorphous iron as the stator core material to increase the efficiency of electric machines in serialised production. Design/methodology/approach In the design process of a new structure...

...N. Takahashi; A. Fukum; D. Miyagi Purpose In this paper, a new method for estimating iron loss under a distorted elliptical rotating flux is proposed. Design/methodology/approach In order to precisely analyze the iron loss of rotating machines, the iron loss under distorted rotating flux...

...M. Dems; K. Komęza; S. Wiak; T. Stec Applies the field/circuit two‐dimensional method and improved circuit method to engineering designs of the induction motor with stator cores made of amorphous iron. Exploiting of these methods makes possible computation of many different specific parameters...

...) and massive conductors (which display skin effect; e.g. rotor bars in squirrel‐cage induction motors) (Lombard and Meunier, 1993). Single‐valued BH‐curves are usually adopted for all (nonlinear) materials comprising the model. The irreversible material behaviour in the iron cores is thus...