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The electrode erosion is a serious problem for pulsed power switches working under high current. A rotary-arc gap switch (RAG) is the switch form that can reduce the electrode erosion through the fast rotation of the arc. A RAG with a coaxial cylindrical structure is designed in this paper, mainly composed of two electrodes and two coils. The finite-element-analysis software Ansoft is used to simulate...
A simulation model of a 180 turns continuous disc type transformer winding was used to study the propagation characteristics of partial discharge (PD) based on multiconductor transmission line (MTL) theory. In order to obtain distribution parameters of unit length of windings, two 2D axial symmetric finite element(FE) models are set up under ANSYS environment. The electromagnetic FE model is used...
In order to investigate the propagation of partial discharge pulses in transformer winding, the simulation model of a 180 turns continuous disc type transformer winding based on multi-conductor transmission line (MTL) theory is constructed. According to the symmetry of windings, a 2D equivalent finite element model is set up under ANSYS environment. A modified method is proposed to calculate the K...
This paper uses multi-conductor transmission line (MTL) to model transformer windings. According to the symmetry of windings, a 2D equivalent finite element model can be set up under ANSYS environment. On the basis, finite element method (FEM) is used to calculate the distributed parameters in transformer windings. In the process of calculation, the skin effect is focused on. The frequency-dependent...
Inductance gradient has great influence on the performance of railgun. This paper deduced armaturepsilas force formulation, explained inductance gradientpsilas physical meaning, introduced the governing equation of 2-D time harmonic electromagnetic field, built railgunpsilas 2-D finite element model; a common structure railgunpsilas inductance gradient is calculated. The influence of time harmonic...
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