Exact and approximated analysis of voltagecommutated dctodc converters
Abstract
Due to the voltagecommutation, it is necessary 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 pulsewidth modulated control a dynamic model follows, linearized around the steady state working point. In the case of dc choppers the useful signal is the lowfrequency 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. Via series expansions, an analytical approximation model is obtained, which simply can be interpreted as continuous equivalent circuit. Then a further analysis follows with the well known methods of dc networks.
 Publication:

PESC 1981; Power Electronics Specialists Conference
 Pub Date:
 1981
 Bibcode:
 1981ppes.conf..337G
 Keywords:

 Electric Choppers;
 Network Analysis;
 Performance Prediction;
 Voltage Converters (Dc To Dc);
 Voltage Regulators;
 Design Analysis;
 Differential Equations;
 Dynamic Models;
 Equivalent Circuits;
 Power Conditioning;
 Pulse Duration Modulation;
 Steady State;
 Electronics and Electrical Engineering