The fascination with air core source frequency transformers,(not the typical high frequency tesla coil) is often derived from the fact that the secondary amp turn multiplication can exceed that of its primary source. But all this is explainable in terms of apparent vs real power. I have made a vector drawing showing the solution to the following problem which seems paradoxical. For the line voltage case when two wye sources of emf are combined to become a delta output, the resultant voltage as the hypotenuse formed on a vector drawing is a vector subtraction. Two line connected one volt wye vectors from the source can combine in series to become 1.73, or the square root of 3 volts. In turn those delta outputs can power adjacent three phase primaries who send energy to adjacent 3 phase secondaries then we again connect those secondaries in series to again obtain a higher voltage by making the series connection as was done in the wye to delta transformation that yielded a 1/1.73 ratio. But now the same expected 1/1.73 ratio or 120 degree phase angle to be found on the secondaries is found to be widened, as we have failed to account for the mutual induction between the secondaries themselves. And ordinarily then we could not further combine voltages obtained from the third phase and put them in series to obtain more voltage then the first combination alone yielded. But a consequence of HOW the primaries are combined in space themselves to have a very high mutual induction between them is entailed in the following problem, where I will later show a feasible vector solution of the three secondaries in series. HDNhttps://answers.yahoo.com/question/index?qid=20141124084216AACW1gnPioneering the Applications of Interphasal Resonances http://tech.groups.yahoo.com/group/teslafy/
