The purpose of this paper is to present an efficient converter circuit used to drive switched reluctance motors. It uses the C-dump topology in which the trapped energy in the phase windings is returned to the supply capacitor to be used in the following strokes. In addition to the C-dump topology, it uses two extra feedbacks. One comes from a governor mounted on the shaft of motor which contro...

Hysteresis motors are self starting brushless synchronous motors which are being used widely due to their interesting features. Accurate modeling of the motors is crucial to successful investigating the dynamic performance of them. The hysteresis loops of the material used in the rotor and their influences on the parameters of the equivalent circuit are necessary to be taken into considerat...

This paper discussed the circuit level design and simulation of fractional-N frequency divider, a circuit block used mainly in frequency synthesizer. The design was done in schematic level. A low power 0.5 micron CMOS technology called CMOSIS5 used for modeling the circuit devices. The frequency divider was design for 900 MHz GSM standard mobile communication application. For the simulation, ci...

5.1 Abstract 5.2 Introduction Full-System Simulation • Computational Complexity of MEMS Flows • Coupled-Domain Problems • A Prototype Problem 5.3 Coupled Circuit-Device Simulation 5.4 Overview of Simulators The Circuit Simulator: SPICE3 • The Fluid Simulator: NεκTαr • Formulation for Flow-Structure Interactions • Grid Velocity Algorithm • The Structural Simulator • Differences between Circuit, ...

The paper presents a methodology for simulating the static and dynamic performance of integrated circuits in the presence of electro-thermal interactions on the integrated circuit die. The technique is based on the coupling of a finite element method (FEM) program with a circuit simulator. In difference to other known simulator couplings a time step algorithm is used. Its implementation into si...

Engineering design and analysis (EDA) software circuit simulators has traditionally focussed virtually exclusively on the scientific calculations performed by the software. Software technology, however, has matured to the point where it can provide significant improvements in the ability of EDA software to address the full requirement of the engineering design flow. In this paper we describe so...

An object-oriented microwave circuit simulation environment is described. The design of the program is intended to offer flexibility without sacrifying efficiency. Recent developments in object-oriented techniques and in C++ compilers are used to obtain a flexible and robust system ideally suited to the development of a global modeling strategy for the integration of circuit, field, thermal and...

PURPOSE Numerical study of microwave imaging and microwave-induced thermoacoustic imaging utilizes finite difference time domain (FDTD) analysis for simulation of microwave and acoustic interaction with biological tissues, which is time consuming due to complex grid-segmentation and numerous calculations, not straightforward due to no analytical solution and physical explanation, and incompatib...

A new output structure for class E power amplifier (PA) is proposed in this paper. A series LC resonator circuit, tuned near the second harmonic of the operating frequency is added to the output circuit. This resonator causes low impedance at the second harmonic. The output circuit is designed to shape the switch voltage of the class E amplifier and lower the voltage stress of the transistor. T...

In recent years there has been much pressure placed on system designers to verify their designs with computer simulations before committing to actual printed circuit board layouts and hardware. Simulating complex digital designs is extremely beneficial, and very often, the prototype phase can be eliminated entirely. The same is not true for most analog circuits. While simulation can give a grea...