Ideal Power Inc (IPWR)

[tykundegex]

in fact the white paper states:

The link inductor has 3 operating states: 1. switched into the battery filter, 2. switched into the utility line, and 3. switched to neither side, when it exchanges current with the link capacitor and changes voltage polarity with restrained du/dt. The latter feature is the key to our converter's unique and highly advantageous properties, as the low du/dt produces a very soft turn-off, turn-on, and reverse recovery, giving very low switching losses despite the high power cycle frequency and the use of relatively slow IGBT's and rectifer grade diodes...Note than the utility and battery side lines are never connected together, a feature which eliminates the need for transformers when multiple converters are used in parallel, as will likely normally be in the case in large installations.