Modeling and control of single-phase AC/DC converters

Power electronic converters as the intermediate stage connect various loads to power sources. In many cases, the power source is directly from the utility grid, which is an AC sinusoidal voltage. However, in various applications (e.g., adjustable speed motor drives), the AC power should first be converted into DC power. This conversion is called rectification and this chapter models single-phase AC/DC converters from the simplest diode rectifiers to controllable AC/DC converters. Then, the control strategies will be discussed with a focus on improving the power quality at the AC side, e.g., using a single-phase power factor correction control. Additionally, this chapter overviews the phase-locked loop synchronization techniques for single-phase AC/DC conversion systems, which are also applicable to single-phase DC/AC inversion systems. Different cases are presented to exemplify the control design considerations of single-phase AC/DC rectifiers.