Klemens Heumann – författare

Das Aufkommen der Thyristoren führte zu einer neuen Entwicklungsphase der Energieelektronik. Mit den Vorläuferelementen der Thyristoren auf Gasentladungs­ basis war nur ein Teil der vielen Ideen aus dem Gebiet der Energieelektronik technisch-wirtschaftlich realisierbar. Mit Hilfe der Thyristoren konnten einige alte, bisher praktisch nicht lösbare Ideen zum Erfolg gebracht werden. Die besseren technischen Eigenschaften der Thyristoren gestatten auch ganz neuartige tech­ nische Anwendungen. Auch werden heute Geräte und Anlagen, in welchen bisher das Quecksilberdampfgefäß vorherrschte, mit Halbleiterbauelementen ausgeführt. Bei der großen Fülle der Arbeit, die hier im letzten Jahrzehnt geleistet wurde, ist es besonders erfreulich, daß zwei Fachleute, die als Forscher und Entwickler beim Aufbau dieser neuen Technik maßgeblich beteiligt waren, die Mühe nicht gescheut haben, das bisher Erarbeitete in Buchform niederzulegen. Es trifft sich dabei besonders glücklich, daß der eine der beiden Autoren die Entwicklung der Bau­ elemente durch die Erarbeitung der neuartigen Meßtechnik und vieler Grund­ schaltungen, der andere die Entwicklung komplexer Geräte, wie Gleichstrom­ steller und Drehstrompulswandler, maßgeblich beeinflußt hat. Beide Verfasser sind in Fachkreisen bestens bekannt, nicht zuletzt durch ihre intensive Mitarbeit bei Fachtagungen und Diskussionssitzungen der Fachgruppe "Energieelektronik" des Wissenschaftlichen Ausschusses des Verbandes Deutscher Elektrotechniker. Es ist mir deshalb ein persönliches Bedürfnis, den Autoren für ihre Arbeit zu danken und dem Buch zu wünschen, daß es ein Markstein in der Entwicklung der Energieelektronik werde.

Power electronics became an identifiably separate area of electrical engineering with the invention of the thyristor about 30 years ago. The growing demand for controllability and conversion of electric energy has made this area increasingly important, which in turn has resulted in new device, circuit and control developments. In particular, new components, such as the GTO and power MOSFET, continue to extend power electronic technology to new applications. The technology embodied by the name "power electronics" is complex. It consists of both power level and signal level electronics, as well as thermal, mechanical, control, and protection systems. The power circuit, that part of the system actually processing energy, can be thought of as an amplifier around which is placed a closed loop control system. The goal of this book is to provide an easily understood exposition of the principles of power electronics. Common features of systems and their behavior are identified in order to facilitate understanding. Thyristor converters are distinguished and treated according to their mode of commutation. Circuits for various converters and their controls are presented, along with a description of ancillary circuits such as those required for snubbing and gate drives. Thermal and electrical properties of semiconductor power devices are discussed. The line-converter and converter-load interfaces are examined, leading to some general statements being made about energy transfer. Application areas are identified and categorized with respect to power and frequency ranges. The many tables presented in the book provide an easily used reference source.

Power electronics became an identifiably separate area of electrical engineering with the invention of the thyristor about 30 years ago. The growing demand for controllability and conversion of electric energy has made this area increasingly important, which in turn has resulted in new device, circuit and control developments. In particular, new components, such as the GTO and power MOSFET, continue to extend power electronic technology to new applications. The technology embodied by the name "power electronics" is complex. It consists of both power level and signal level electronics, as well as thermal, mechanical, control, and protection systems. The power circuit, that part of the system actually processing energy, can be thought of as an amplifier around which is placed a closed loop control system. The goal of this book is to provide an easily understood exposition of the principles of power electronics. Common features of systems and their behavior are identified in order to facilitate understanding. Thyristor converters are distinguished and treated according to their mode of commutation. Circuits for various converters and their controls are presented, along with a description of ancillary circuits such as those required for snubbing and gate drives. Thermal and electrical properties of semiconductor power devices are discussed. The line-converter and converter-load interfaces are examined, leading to some general statements being made about energy transfer. Application areas are identified and categorized with respect to power and frequency ranges. The many tables presented in the book provide an easily used reference source.