Robust Batteryless Power Back up for Critical Power Applications

Today, lead-acid batteries are used extensively as the primary stored energy medium. Their performance capabilities have been well documented. When used as the primary energy storage device to support sensitive electronics until a standby generator system is online, batteries are the weak link in the emergency power system. Batteries must live in a controlled environment and require extensive maintenance; two major elements that are not always available.An alternative has been conceived to replace batteries as a stored energy system. This alternative, known as the JDUPS or Hybrid Dynamic Uninterruptible power System, uses a solid steel flywheel to store kinetic energy and provides a rectified DC output. Simple rules of physics govern the amount of stored energy, based upon flywheel diameter, face (thickness) and speed. The HDUPS is based upon a standard robust motor generator set platform which can operate in variable frequency drive and a rectifier. A prototype system in the 35 kVA range will be built to demonstrate a minimum 30 seconds of stored energy. This technology is applicable to any market where users will no longer accept battery failures.