Control of switched-mode converter harmonic-free terminal waveforms through internal energy storage

It is shown that internal low-frequency energy storage can be used to achieve harmonic-free operation and controllable power factors in converters whose desired operations require unequal instantaneous input and output powers, such as in single-phase rectifiers, inverters, cycloconverters, and reactive power generators. A systematic synthesis and analysis technique is developed for such converters. This technique can be used to find all converters which can be obtained from a given set of network elements. Since this technique includes converter dynamics, it leads to a systematic procedure for the design of these converters for given specifications with minimum component size.