Galvanic isolation via the transformer: Galvanic isolation for outputs enables having power outputs that are “floating” with respect to the input (meaning there are no direct electrical connections or no electric current conducting path between input and output). The benefits of galvanic isolation include, for example and without limitation: that ground loops can be broken to reduce noise in electrical systems; the output polarity can be freely chosen; and the current-isolation barrier (formed by the transformer 222) can form an important safety element to prevent electric shock and to reduce other hazards caused by electrical fault conditions (such as short circuits).

Transformer cooling: In some embodiments, the AC-to-AC transformer 222 provides for resonant coupling with current isolation at very high frequencies (well over 60 Hz), which enables the use of a small transformer with high power density and high efficiency (low power loss). Thus transformer 222 may provide for very efficient power transfer, or equivalently, very low power loss. As a result, the transformer 222 may generate high levels of heat. In some embodiments cooling for the transformer 222 may be provided for by conventional means, such as air cooling, heat sinks, and fans; but in alternative embodiments, cooling for transformer 222 may be provided for by alternative or additional cooling systems. For example, some embodiments of the present system and method may employ, for transformer cooling, a liquid/fluid cooling systems for high power-density (HPD) transformers, such as one of the exemplary cooling systems taught in co-pending PCT patent application number PCT/US20/26026, filed 31 Mar. 2020, applicant General Electric Company (hereinafter, the '026 application), or other liquid cooling systems within the scope of the claims of the '026 application.