Patent ID: 8446037

Claim:
An energy storage system comprising: a source of power; an AC bus connected to said source of power; a DC bus having a DC source voltage; a load connected to said DC bus; a rectifying means connected to said AC bus and to said DC bus, said rectifying means for converting AC power from said source of power to DC power to said load; an energy storing means connected to said DC bus, said energy storage means for supplying energy to said load; an energy supplying means connected between said energy storing means and said DC bus, said energy supplying means for supplying energy to said load when a DC voltage to said load is less than the DC source voltage; a charging means connected to said AC bus, said charging means for supplying power to said energy storing means; and a blocking diode connected between said energy storing means and said DC bus, said charging means connected between said blocking diode and said energy storing means.