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electromagnetic-analysis
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Accurate and fast subdomain model for electromagnetic design purpose of wound-field linear resolver
, Article IEEE Transactions on Instrumentation and Measurement ; Volume 70 , 2021 ; 00189456 (ISSN) ; Saneie, H ; Daniar, A ; Nasiri Gheidari, Z ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2021
Abstract
Linear resolvers are position sensors that are being used in a wide range of applications for linear motion systems. The electromagnetic design of a linear resolver, similar to any other electromagnetic device, demands an accurate, functional, and fast tool. While the finite element method (FEM) is considered the most accurate tool for electromagnetic analysis, it is not a good candidate for an optimization-based design which is an iterative process. In this article, first off, an analytical tool based on the subdomain model is briefly presented. This model is very accurate and much faster than FEM. However, it has high computational time for iterative design and optimization processes....
Programmable surface electromagnetic wave coupler
, Article 15th International Conference on Microelectronics, ICM 2003, 9 December 2003 through 11 December 2003 ; Volume 2003-January , 2003 , Pages 147-150 ; 9770520101 (ISBN) ; Rashidian, B ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2003
Abstract
Recently, a group of novel devices based on conducting interfaces is proposed. These conducting interfaces can be implemented by using the inversion layer of MOS structures, trapped charges or depletion layer charges. It has been shown that these structures can support surface electromagnetic waves. In this paper, the coupling of surface electromagnetic waves supported by conducting interfaces is analyzed and an analytical formula is driven by using the coupled mode theory. It is shown that one can program the coupling length of this structure by applying a transverse voltage and obtain a new type of optical modulator. The results obtained by coupled mode theory are verified by solving...
Optimum Design of Low Speed Superconducting Synchronous Machine
, Ph.D. Dissertation Sharif University of Technology ; Zolghadri, Mohammad Reza (Supervisor) ; Fardmanesh, Mehdi (Supervisor)
Abstract
Using superconducting synchronous machine leads to many advantages such as increasing overall efficiency, decreasing mass and valume of peropulsion system, eliminating some restrictions in hydrodynamic design , etc. The goal of this thesis is design of 200 kW, with 250 rpm superconducting synchronous motor for small ship propulsion drive application. The low speed motor can be directly coupled to the propeller whitch eliminates bulky and inefficient gearbox. After comparison of different structures of superconducting synchronous machines, finally rotating superconducting field with stationary copper armature winding is selected as the most approporiate structure for our application.
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Design and electromagnetic analysis of a superconducting rotating machine
, Article 2008 Australasian Universities Power Engineering Conference, AUPEC 2008, Sydney, NSW, 14 December 2008 through 17 December 2008 ; 2008 ; 9781424441624 (ISBN) ; Vakilian, M ; Fardmanesh, M ; Sharif University of Technology
2008
Abstract
A superconducting synchronous motor with an inductor containing bulk high temperature superconductor and BiSrCaCuo wires has been studied in this paper. The principle of operation is based on the interaction between the two spatial variable magnetic fields in the motor air gap. One of the two aforementioned magnetic fields is produced by the superconducting inductor based on magnetic shielding of high temperature superconductors. A procedure is developed to calculate the magnetic field produced by the inductor in the environment of the commercial finite element code ANSYS. The HTS motor is designed to develop 100 hp (the rated power). © 2008 Australasian Universities Power Engineering...