Coupled-Inductor Inversion, Rectification and Cycloconversion

Citation

El-Hamamsy, Sayed-Amr (1986) Coupled-Inductor Inversion, Rectification and Cycloconversion. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/BHKX-4J16. https://resolver.caltech.edu/CaltechETD:etd-03262008-092115

Abstract

A new PWM approach using three state switching of negatively coupled inductors can be applied to any basic dc-to-dc converter to form single-phase dc-to-ac inverters. Current reference programming gives improvements in linearity, small-signal dynamics, and pulsed-load response. The current programming loops of the flyback and boost inverters are stable at all operating points. New multiple output magnetic structures are introduced that apply space and time multiplexing of magnetics to give non-interacting outputs. The magnetics are analysed for different operating conditions. The inverters with two independent outputs are derived by use of the multiple output magnetics. These are used to form the three-phase versions of the inverters, The corresponding three-phase ac-to-dc rectifiers are also derived with close to ideal current waveforms as well as power factor correction capabilities. Finally, to complete the family of power converters the polyphase ac-to-ac cycloconverters are derived incorporating the qualities of both the inverters and the rectifiers.

Thesis Files