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The three-dimensional (3D) open boundary eddy current field induced by heavy current flowing in the coils and winding leads in large power transformers is calculated. The eddy current loss and local overheating problem in the tank wall and in the ascending flange of bushings are analyzed and reported in this paper. The effectiveness of a magnetic by-pass plate near the coil ends for reducing the eddy...
This paper presents a novel numerical method, which will be referred as the position stepping method (PSM), to predict the performances of switched reluctance motor (SRM) drives. The 2D bicubic spline is employed to generate the finite rectangular elements. The 2D bilinear spline is used to model the nonlinear magnetic characteristics in SRMs. Consequently, the conventional nonlinear first-order differential...
Based on two-dimensional (2-D) trigonometry, a new numerical method is presented to describe nonlinear magnetic and electromagnetic torque characteristics in switched reluctance motors (SRMs). The computed and experimental results demonstrate that the proposed numerical method can be used to precisely compute nonlinear magnetic and torque characteristics in SRMs
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