
13-1
13.1 Introduction
e DC–DC converters illustrated in Figure 13.1 are used to interface two DC systems and control the
ow of power between them. eir basic function in a DC environment is similar to that of transformers
in AC systems. Unlike in transformers, the ratio of the input to the output, either voltage or current, can
continuously be varied by the control signal and this ratio can be higher or lower than unity.
DC–DC converters are called choppers in high-power applications. ey are used for DC motor
control, for example, in battery-supplied vehicles and in dierent applications such as in electric cars,
airplanes, and spaceship ...