The Riello VDC-XE flywheel from Critical Power Supplies is a kinetic energy storage system that replaces traditional backup batteries and performs in applications where batteries and other storage devices fall short.

The VYCON flywheel stores kinetic energy in the form of a rotating mass and is designed for high power, short discharge applications.

The VDC series of flywheel energy storage systems provide Riello Master Plus UPS with a source of dc power that can be used to ride through short mains power supply failures. The length of supply available can be used to cover the start-up time of a standby generator or prevent the initial discharge of a locally connected battery set.

The VDC flywheel connects directly to the UPS DC busbar and is a standalone device supplied in a matching cabinet.
The VDC series of flywheels has been designed for UPS applications within datacentres, hospitals and industrial installations.

The patented flywheel concept is a form of ‘energy harvesting’ and provides a green, clean source of back up power by converting the kinetic energy stored within a rotating mass to electrical power through a builtin
IGBT-based converter.

Two sizes are available (VDC and VDC-XE) with a loadrelated back-up autonomy.

VDC FLYWHEEL CONCEPT – The Riello UPS VDC-series flywheel stores kinetic energy in the form of a rotating mass (spinning at 36,000 RPM) within a sealed container.
The patented technology includes the flywheel hub, formed from aerospace-grade steel, a high speed permanent magnet motor generator, contact-free magnetic bearings that levitate and sustain the rotor during operation, and a superior touch-screen control system that provides vital information on system performance.

A flywheel is also known as a ‘mechanical battery’ and energy storage system, and is used to perform the
traditional role of battery sets within a standby power application.

Features and Benefits.

• High reliability/predictability
• Lowest cost of ownership
• High power density
• Small footprint
• High efficiency – 99.4%
• 20 year lifespan
• Green technology
• Minimal maintenance
• No bearing replacement
• Simple installation