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In this paper the mathematical modeling of the diode field emission system on the basis of field emitter as a semi-ellipsoid on a flat-surface substrate is considered. The anode is a semi-ellipsoidal surface. The internal area of the system is contained with two layers of different dielectrics. The boundaryvalue problem for the Laplace’s equation in the prolate spheroidal coordinates is solved to...
The rotationally symmetric diode system with a field cathode is under investigation. The shape of the field cathode is sphere-on-cone. The anode is a part of a sphere. In this paper two cases are considered, when the interior of system’s domain is filled with two and three different dielectrics. To calculate the electrostatic potential distribution the method of separation of variables is used. The...
Magnetic field analysis techniques have been widely applied to the optimal design of magnetic circuits as the key components of electric devices. This paper describes a new numerical approach to complicated dynamical systems in which the magnetic field changes with time and with movement of objects, and demonstrates application to an induction motor. This method is based only on finite element analysis,...
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