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EPE 1985 - 00 - Keynotes: SURVEY PAPERS
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	HlSTORY OF EUROPEAN POWER ELECTRONICS   By A. Kloss	[View]   [Download]
Abstract: Overview of the development of power converter technology since the beginnings of electrophysics in the eighteenth century. The accent is placed on the earliest history of rectifier valves, namely on the elements in the plasma, as well as those in the solid, which achieve the rectifying effect. From about 1910 the pre-industrial development stage was followed by the generation of industrial ionic power converters, the mercury-arc rectifier. The second generation of power converters operating on the basis of silicon occurs at the end of the fifties.
	STATE OF THE ART AND DEVELOPMENT IN THE FIELD OF MEDIUM POWER DEVICES   By J. M. Peter	[View]   [Download]
Abstract: The bipolar transistor has become a key component in power electronics. The need is not only increasing but it is also becoming diversified. Firstly, the author shows the physical laws which govern the behavior of transistors and the limitations caused by circuits. Secondly, the author analyzes the principle requirements of motor drives, UPS, converters, and other such equipment, showing that the required characteristics lead to very different performances for bridge leg switches. Finally, from this analysis, the author classifies transistors into different transistor groups well-adapted to specific technical needs. Progress in different areas, integration, new methods of diffusion, and general market trends will create new trends for the future.
	STATE OF THE ART AND DEVELOPMENTS IN HIGH POWER SEMICONDUCTOR DEVICES   By P. De Bruyne; J. Vitins	[View]   [Download]
Abstract: The present status of high power semiconductor devices is described followed by an outlook on possible device improvements in the future. Large phase-control thyristors today regulate powers in excess of 1500 MW per single installation and are constantly being improved to facilitate their application. In the region of =< 1 MW many new turn-off devices are entering the field of power semiconductor components and are competing against each other as well as against conventional solutions. The basic characteristics and limitations of these devices are described.
	DIGITAL CONTROL SYSTEMS IN POWER ELECTRONIC EQUIPMENT   By A. Haböck	[View]   [Download]
Abstract: Although digital systems have long been standard practice in the field of programmable controllers (PC) and process automation systems fully digital control systems are only now becoming generally adopted in power electronic equipment. This is because of the enormous variety of converter designs has made it difficult to develop the universal modular concepts desired by users as well as manufactures. Moreover, power electronic systems are increasingly being incorporated in higher level control systems, and so the demands placed on these higher level systems with respect to engineering, monitoring and communication also apply in full to lower level control systems. On the basis of a process automation model and a converter control model, these requirements are defined, various possible configurations are discussed and examples of dedicated solutions and system concepts are given.