Title :
Exact and approximated analysis of voltage-commutated DC-TO-DC converters
Author :
Grotzbach, Manfred
Author_Institution :
Department of Electrical Engineering University of Federal Defence Munich, Neubiberg, FRG
fDate :
June 29 1981-July 3 1981
Abstract :
Due to the voltage-commutation, one has to take an additional subinterval into account during analysis. The difference equation of sample values is set up starting from piecewise linear differential equations. For pulse-width modulated control a dynamic model follows, linearized around the steady state working point. In the case of dc choppers the useful signal is the low-frequency mean value. The difference equation of the mean value behaviour can be obtained via a discrete relation between mean- and sample value. If sufficient smoothing is provided a continuous equivalent differential equation can be derived. One obtains via series expansions an analytical approximation model, which simply can be interpreted as continuous equivalent circuit. Then a further analysis follows with the well known methods of dc networks.
Keywords :
Approximation methods; Choppers (circuits); Eigenvalues and eigenfunctions; Integrated circuit modeling; Mathematical model; Steady-state; Switches;
Conference_Titel :
Power Electronics Specialists Conference, 1981 IEEE
Conference_Location :
Boulder, Colorado, USA
DOI :
10.1109/PESC.1981.7083658