Patent ID: 9716428
Date: 2017-07-25
CPC Classifications: H02M

Claim:
1. A high voltage transformation system for transforming electric power from a high voltage direct current source to a lower voltage direct current output or to a lower voltage alternating current (ac) without intermediate magnetic transformation, they system comprising: a plurality of transformers, each transformer comprising a plurality of stages, wherein each stage comprises one or more capacitors, and one or more switching devices; and a controller that controls the switching devices to change the polarity of a plurality of the capacitors; wherein the controller causes a plurality of the capacitors to be charged in series at the high voltage and then causes a plurality of the capacitors to be separately reversed in polarity; and wherein the lower voltage output is caused to vary in time, describing a 1-sine ⊖ current wave shape; wherein a number of the transformers, the number being an integer multiple of three, are connected in parallel and caused to generate 1-sine ⊖ current wave shapes which, by virtue of displacement of their relative electrical phase position, draw from the high voltage dc source an aggregate current which has essentially no sinusoidal content.