
14-1
14.1 Introduction
Static power converters that adapt DC voltages and currents to AC waveforms are usually known as
inverters. eir main function is to generate from one or multiple DC sources an AC switched pattern
output waveform, with a fundamental component with adjustable phase, frequency, and amplitude to
meet the needs of a particular application. A generic block diagram describing this function of the
inverter is shown in Figure 14.1 for a generic DC-variable x
dc
, usually voltage or current. Note that A
dc
is the xed amplitude of x
dc
, while A
ac
, f, and θ represent the adjustable amplitude, frequency, and phase
of the fundamenta