Uninterruptible power supply systems using electrohydraulic energy storage

Abstract

A power supply system includes an inverter configured to be coupled to a load and an energy storage device, such as one or more capacitors, coupled to a DC input of the inverter. The power supply system further includes an electrohydraulic energy storage system configured to be coupled to the load and including a hydraulic accumulator, a generator, and a hydraulic motor mechanically coupling the generator and the hydraulic accumulator, along with a control circuit configured to control the electrohydraulic energy storage system responsive to a state of an AC power source coupled to the load.

Dependencies are inferred from the claim text.