3,345 research outputs found
Een solidaire loonpolitiek voor Nederland?
No full textEen solidaire loonpolitiek voor Nederland?, in: A. Buitendam, D.A.G. Dumas, A.C. Glebbeek (red.), Het Zweedse Model: geschikt voor import?, Van Gorcum, Assen/Maas-tricht 1990, pp.155-164.: Het Zweedse model : geschikt voor import? / red.: A. Buitendam, D.A.G. Dumas, A.C. Glebbeek Auteur: Arend Buitendam (1935-); Didier Dumas (1958-) Jaar: 1990 Congres: The Swedish model of industrial relations: suitable for import (1988 ; Groningen) Uitgever: Assen [etc.] : Van Gorcum Annotatie: tabBijdragen van het symposium The Swedish model of industrial relations: suitable for import, gehouden te Groningen, november 1988Met lit. opg Omvang: 236 p Formaat: 24 cm ISBN: 90-232-2517-
A direct A.C. to A.C. regenerative frequency and voltage converter
No full textIncludes bibliographical references.The reliable variable speed operation of an a. c. machine over a wide speed range is a problem that has received attention for some time. In this thesis a system to permit such operation from a fixed frequency fixed voltage supply is proposed, under the name of the asynchronous modulation converter. This converter is of the cycloconverter family, but is force-commutated and is not synchronised with the supply frequency. The power switching element comprises a power transistor in a diode bridge, coupled to the control circuitry by opto-isolators. The output of the a-mod converter is produced by a "chopper" modulation process and this results in the harmonics present being at frequencies well removed from the fundamental. A feedback system to ensure smooth commutation of the output current from the power switches is described. This feedback system operates by sensing the rate of rise of the inductive voltage surge on the load when a switch is opened to operate a freewheel path switch
- …
