Modern Electronic Systems are quite often powered from a three-phase
power source. While utilizing power modules that operate directly from
three-phase power might seem to provide optimal simplicity and flexibility,
the added complexity required to realize three-phase power factor
corrected circuitry usually negates any potential savings. This paper
compares single-phase and three-phase circuits from the component count,
stress level and complexity standpoints. It demonstrates that when these
items are taken into account, quite often the best choice is a combination
of single-phase modules, configured to balance individual power line
phases.