有限元软件ANSYS电磁学科的使用及其在电力变压器分析中的应用

Based on the use of finite element method(FEM) software ANSYS in electromagnetism, the electromagnetic processing of single winding 2D transformer and double winding 3D transformer are analyzed fully. Two examples, which are 2D static field and constant magnetic field, illustrate that the symbolization color vector pictures and curves obtained by ANSYS are not to achieve with other FEM softwares developed by individuals. For a transformer, the forces born by each winding pie and even each turn are analyzed separately under the conditions of unloading, normal load and short circuit. Especially under the condition of short circuit, there are pushing, pressing, suspending and vibrating between winding turns, and then the total winding is probably damaged. Therefore, the detail results give a basis to further fault diagnosis.

面向21世纪的应用电磁学科与技术进展

第3届亚洲地区应用电磁学国际学术会议(The Third Asian Symposium on AppliedElectromagnetics,ASAEM’2001)于2001年5月28～30日在浙江大学召开。会议由中国电机工程学会、中国电工技术学会和日本应用电磁学与机械学会共同发起,以自日本、韩国、越南和中国的172名代表参加了这一学术与工程界的盛会。 ASAEM系列国际学术会议的召开,源于日、中、韩三国学者的共同建议。创建ASAEM的目的在于通过两年一度的该系列国际学术会议(ASAEM’1996-Beijing,ASAEM’1998-Tokyo和ASAEM’2001-Hangzhou),以促进亚洲广大地区应用电磁领域的学者、研究人员和工程技术界之间的学术交流、专题讨论和科研合作,及时把握应用电磁学科与技术的前沿研究成果,并为加强亚洲地区学术领域的国际合作,繁荣亚洲区域的科技与经济作出有益的贡献。

微波在东南

东南大学是我国最早开展电磁场与微波技术教学和科研的大学之一,其教学活动可追溯到上世纪二十年代国立东南大学(国立中央大学)电机系设立的初期。在九十多年的历史中,为我国无线电领域培养了众多人才并做出了很多有影响的科学与技术贡献。1993年依托电磁场与微波技术国家重点学科建立了我国本领域唯一的"毫米波国家重点实验室"。本文简要介绍了电磁场与微波技术学科在东南大学的历史渊源、发展历程和现状。

马陵山台前兆观测数字化改造

系统的介绍马陵山地震台前兆观测数字化改造情况,提出了改造过程中遇到的突出问题,部分问题提供了解决方法。提供了台站数字化改造后观测的初步经验。

The Nature of Normal Science： Arthur Compton＇s Research Programme as an Exemplar

Thomas S. Kuhn＇s theory of normal science （NS）, aside from being a provocative philosophical reconstruction of the relatively conservative phase of scientific research, contains useful ideas for systematic analysis of specific episodes in the history of science. Therefore, although the theory has been looked at from different angles since the first edition of The Structure of Scientific Revolutions （TSSR） was published in 1962, its detailed exploration of the cumulative phase of research in mature science is of abiding relevance in the philosophy of science. This is because NS provides a compelling account of how and why members of scientific communities succeed, largely, to produce reliable knowledge about an incompletely known phenomenal world. Again, the theory elucidates special features of scientific research that differentiate it from other creative enterprises. In that regard, this paper reconstructs Arthur Compton＇s research into x-ray scattering as a good instantiation of NS. Discussion of Compton＇s convincing demonstration of the particulate properties of electromagnetic radiation within the framework of NS showcases the elucidatory power of Kuhn＇s theory with respect to selected episodes in science, and corroborates the notion that the bulk of scientific work is a conservative puzzle-solving activity with the potential for precipitating scientific revolutions. To the best of my knowledge, this is the first time that Compton＇s groundbreaking work on x-ray scattering has been analysed within the framework of Kuhn＇s philosophy of science.

Development of a Small Scale Magnetically Levitated Train as Demonstrator for Undergraduate Mechatronics Students

At the Institute of Electrical Machines of the Rheinisch Westfalilische Technische Hochschule Aachen University, there is a project financed by student fees for the realization of a magnetically levitated train in the scale of 1：50. Undergraduate students are supposed to get the possibility to design and build up a real train which serves as demonstrator for a mechatronic system. This project strengthens the motivation of students, since a practical demonstration of electromagnetic forces is given in addition to theoretical courses. This paper introduces the major project steps and explains the learning targets for the students. It focuses on analytical magnetic circuit design, numerical field simulation, modeling and control of a multi degree of freedom system, electronic circuit design, measurement setups and a first prototype test bench.

The state-of-the-art of the China Seismo-Electromagnetic Satellite mission

The China Seismo-Electromagnetic Satellite(CSES) mission was proposed in 2003 and approved in 2013 after ten years' scientific and engineering demonstrations. To meet the requirement of scientific objectives, the satellite is designed to be in a sunsynchronous orbit with an altitude of 507 km and descending node time of 14:00 LT. The CSES satellite carries 8 instruments,including search-coil magnetometer(SCM), electric field detector(EFD), high precision magnetometer(HPM), GNSS occultation receiver(GOR), plasma analyzer package(PAP), langmuir probe(LAP), high energetic particle package(HEPP) and detector(HEPD), and tri-band beacon(TBB), among which HEPD is provided by Italian Space Agency. The CSES satellite was launched successfully on February 2, 2018, and is planned to operate for 5 years. The CSES mission is the first satellite in China to measure geophysical fields, which will have a lot of application prospects in the study of seismology, geophysics, space sciences, and so on.