Patent ID: 8937822
Filing Date: 2015-01-20
Classification: H02H,H02J,H02M,Y02A,Y02B,Y02E

Abstract:
1. DC to AC conversion apparatus for converting power from a DC source to produce an power output waveform at a first repetition frequency, comprising a set of at least one live AC output terminals, at least one output terminal designated as a ground, neutral or reference potential terminal; a floating DC power source having a positive and a negative terminal connected respectively to the positive and negative DC input terminals of a DC to AC converter, wherein the DC to AC converter causes: (1) an AC output waveform at said first repetition frequency and having a voltage relative to one of said at least one ground, neutral or reference potential terminals to appear with a unique phase at each of a number N at least equal to one of said set of live AC output terminals, and (2) a common-mode voltage waveform at a second repetition frequency to appear relative to one of said at least one ground, neutral or reference potential terminals and in the same phase on both of said positive and negative terminals of said DC power source, wherein the second repetition frequency is a multiple equal to the same said number N of said first repetition frequency.