Two-dimensional (vector) magnetic property and improved magnetic field analysis for electrical machines

2001 ◽  
Vol 108 (2) ◽  
pp. 225-231 ◽  
Author(s):  
Masato Enokizono
Keyword(s):  
Magnetic Field ◽  
Magnetic Property ◽  
Electrical Machines ◽  
Field Analysis ◽  
Two Dimensional ◽  
Dimensional Vector ◽  
Magnetic Field Analysis

scholarly journals Elementary subdomain technique for magnetic field calculation in rotating electrical machines with local saturation effect

2019 ◽  
Vol 38 (1) ◽  
pp. 24-45 ◽  
Author(s):  
Lazhar Roubache ◽  
Kamel Boughrara ◽  
Frédéric Dubas ◽  
Rachid Ibtiouen
Keyword(s):  
Magnetic Field ◽  
Electrical Machines ◽  
Saturation Effect ◽  
Field Analysis ◽  
Polar Coordinates ◽  
Field Calculation ◽  
Content Type ◽  
Magnetic Field Analysis ◽  
Proposed Model ◽  
Local Saturation

Purpose The most significant point to be introduced in the subdomain technique (i.e. based on the formal resolution of Maxwell’s equations applied in subdomain) is the local saturation effect. This paper aims to present a novel contribution on the improvement in the two-dimensional (2-D) technique in polar coordinates by focusing on the local saturation. Design/methodology/approach The rotor and stator regions are divided into elementary subdomains (E-SDs) which are characterized by general solutions to the first harmonic of magnetostatic Maxwell equations. These E-SDs are connected in the two directions (i.e. r- and θ-edges). Newton–Raphson (NR) iterative algorithm is used for nonlinear magnetic field analysis. Findings The proposed model is relevant for different types of rotating electrical machines; as an example, the semi-analytical model has been implemented for spoke-type permanent-magnet (PM) machines (STPMMs). The magnetic field calculations have been performed for nonlinear B(H) curve and compared to nonlinear finite element method (FEM) predictions. The semi-analytic results are in good agreement with those obtained numerically, considering both amplitude and waveform. Originality/value A new model for full prediction of magnetic field in the rotating electrical machines with the local saturation effect is presented.

Improvements of Feedback Control Algorism in Two-Dimensional Vector Magnetic Property Measurements

2010 ◽  
Vol 670 ◽  
pp. 327-335 ◽  
Author(s):  
Takashi Todaka ◽  
Takeru Sato ◽  
Seiji Ishikawa ◽  
Yoshitaka Maeda ◽  
Masato Enokizono
Keyword(s):  
Magnetic Field ◽  
Magnetic Property ◽  
Feedback Control ◽  
Magnetic Flux ◽  
High Magnetic Field ◽  
Type I ◽  
Control Methods ◽  
Two Dimensional ◽  
Dimensional Vector ◽  
Fast Measurement

This paper presents comparison of feedback control algorisms of magnetic flux conditions in two-dimensional vector magnetic property measurements under high magnetic field over 1.6 T. In order to develop a fast measurement algorism, several PID feedback control methods were tested. The results show that the proportion-derivative precedence type (I-PD) control is suitable for reduction of measurement times in vector magnetic property measurements.

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