Vector magnetic property of electrical steel sheet and its influence on distributions of magnetic field and iron loss for electrical machines

2013 ◽  
Vol 33 (1/2) ◽  
pp. 14-27 ◽  
Author(s):  
Heesung Yoon ◽  
Chang Seop Koh
Keyword(s):  
Magnetic Field ◽  
Magnetic Property ◽  
Steel Sheet ◽  
Electrical Steel ◽  
Electrical Machines ◽  
Iron Loss ◽  
Element Analysis ◽  
Content Type ◽  
Electrical Steel Sheet ◽  
The Magnetic Field

Purpose – The purpose of this paper is to present the vector magnetic properties of the electrical steel sheet and investigate its influences on the magnetic field and iron loss distributions for the electrical machines. Design/methodology/approach – The vector magnetic property of the electrical steel sheet is measured by using a two-dimensional single sheet tester and modelled through an E&S vector hysteresis model to be applied to finite element analysis. Findings – The magnetic field and iron loss distributions are calculated by finite element analysis combined with the E&S vector hysteresis model for the three-phase transformer and induction motor models. Originality/value – The influences of the vector magnetic property on the electrical machines are verified by comparing with the numerical results from a scalar magnetic property.

Experimental Study on the Iron Loss Curve at High Field Strength of Non-Oriented Electrical Steel Sheet

2012 ◽  
Vol 721 ◽  
pp. 84-89
Author(s):  
Tsugunori Kanada ◽  
Akifumi Kutsukake ◽  
Yukihito Kido ◽  
Tetsu Ikeda ◽  
Masato Enokizono
Keyword(s):  
Magnetic Field ◽  
Field Strength ◽  
High Field ◽  
Steel Sheet ◽  
Electrical Steel ◽  
Iron Loss ◽  
High Field Strength ◽  
Apparent Decrease ◽  
Ac Field ◽  
Electrical Steel Sheet

At high AC field strength, BH loop tends to twist slightly near the tip point. It results in apparent decrease of iron loss because the overturned parts introduce negative iron loss value. In order to correct this error the phase difference between flux density and magnetic field strength needs to be eliminated. We studied on the problem and got satisfactory results.

Effect of Si Content on Iron Loss of Electrical Steel Sheet Under Compressive Stress

2014 ◽  
Vol 50 (4) ◽  
pp. 1-4 ◽  
Author(s):  
Yoshihiko Oda ◽  
Hiroaki Toda ◽  
Nobuo Shiga ◽  
Shoji Kasai ◽  
Tatsuhiko Hiratani
Keyword(s):  
Compressive Stress ◽  
Steel Sheet ◽  
Electrical Steel ◽  
Iron Loss ◽  
Si Content ◽  
Electrical Steel Sheet

scholarly journals Two-dimensional hybrid model for magnetic field calculation in electrical machines: exact subdomain technique and magnetic equivalent circuit

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Brahim Ladghem Chikouche ◽  
Kamel Boughrara ◽  
Dubas Frédéric ◽  
Rachid Ibtiouen
Keyword(s):  
Magnetic Field ◽  
Maxwell’S Equations ◽  
Maxwell's Equations ◽  
Current Density Distribution ◽  
Electrical Machines ◽  
Field Calculation ◽  
Two Dimensional ◽  
Content Type ◽  
The Magnetic Field ◽  
Load Conditions

Purpose The purpose of this paper is to propose a two-dimensional (2-D) hybrid analytical model (HAM) in polar coordinates, combining a 2-D exact subdomain (SD) technique and magnetic equivalent circuit (MEC), for the magnetic field calculation in electrical machines at no-load and on-load conditions. Design/methodology/approach In this paper, the proposed technique is applied to dual-rotor permanent magnet (PM) synchronous machines. The magnetic field is computed by coupling an exact analytical model (AM), based on the formal resolution of Maxwell’s equations applied in subdomains, in regions at unitary relative permeability with a MEC, using a nodal-mesh formulation (i.e. Kirchhoff's current law), in ferromagnetic regions. The AM and MEC are connected in both directions (i.e. r- and theta-edges) of the (non-)periodicity direction (i.e. in the interface between teeth regions and all its adjacent regions as slots and/or air-gap). To provide accurate solutions, the current density distribution in slot regions is modeled by using Maxwell’s equations instead to MEC and characterized by an equivalent magnetomotive force (MMF) located in the slots, teeth and yoke. Findings It is found that whatever the iron core relative permeability, the developed HAM gives accurate results for both no-load and on-load conditions. Finite element analysis demonstrates the excellent results of the developed technique. Originality/value The main objective of this paper is to achieve a direct coupling between the AM and MEC in both directions (i.e. r- and theta-edges). The current density distribution is modeled by using Maxwell’s equations instead to MEC and characterized by an MMF.

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