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The 3-D substantial model is built for an ultrahigh voltage transformer coil, the equipotential shielding and the bushing end. This model is properly simplified according to the symmetrical structure of the coil. The electric field intensity around the transformer high-voltage coil and the equipotential shielding are calculated on the basis of the finite element method. It is found that the distribution...
This paper presents 2D FEM codes to model the novel traveling wave induction heating system. The nonlinear anisotropic magnetic field including the eddy current and thermal distributions are calculated by utilizing the reduced magnetic vector potential formulation. With the help of FEM method, distributions of eddy current and thermal intensity in the strip, which are very complex in 3D geometric...
Electric field optimization is the key task for vacuum circuit breakers design. By the electric field calculation, the isopotential of a semi-plane flat electrode with infinitesimal small thickness is almost hemicycle, and the figure of an actual shield should be what the isopotential rotates around its shaft for a circular course, but not other figures. Three common figures of middle shield have...
With the development of metal metallurgical industry, there is fast growing interest in induction heating. But there are many disadvantages of the traditional induction heating method. In order to solve that problem, the research of Transverse Flux Heating and Travelling Wave Induction Heating is applied more and more in metallurgical engineering area now. This paper presents the new study and development...
Compared with other known systems, the traveling wave (TW) inductor is considered to be more promising, because it could obtain more uniform heating. In this paper a 2D FEM code has been used with reference to a new double-side slotless TW inductor in order to analyse the distribution of the eddy current density in the moving metal strips. Results show that the slotless TW inductor has a more uniform...
A procedure is presented for optimal design of transverse flux inductor. To improve the convergence speed and local searching ability for genetic algorithm, subpopulation competition and data exchange method is proposed. One purpose of that is for basic population to decide when to produce a new subpopulation; the other purpose is to introduce quality individuals from subpopulation into basic population...
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