| Abstract |
Dynamical behavior of a switched-mode converter under constant-voltage and constant-current control is dependent on the type of load. The transfer functions describing
the converter dynamics are typically given at resistive load but the practical loads are very seldom resistive but composing of other converters upstream, storage batteries or extra capacitors,
etc. The formalism to analyze the load effect may be derive using
two-port unterminated modeling technique giving general and
easily understandable formulas from which the load effect may
be deduced. The open-loop output impedance plays a significant
role either amplifying or attenuating the load effect. The analysis shows that the constant-voltage control has tendency for reduced control bandwidth, and the constant-current control for increased control bandwidth, respectively, when the load magnitude is lower than the magnitude of open-loop output
impedance. |
