System benefits include – Emerson Liebert Power Solutions User Manual
Page 29
EN
TERP
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UPS
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System Benefits Include:
■
The compact, lightweight, and reliable
Liebert FS flywheel system is safe and
environmentally friendly.
■
Offers a low installation cost, small footprint,
low maintenance and long operating life.
■
Unlike batteries, the Liebert FS uses no toxic
metals and emits no explosive gases.
■
Provides quick recharge, operates under a wide
range of temperatures.
■
Patented safety system provides a safe shutdown
under all circumstances.
■
When used with batteries, becomes the
primary DC energy source of more than 98% of
power disturbances (most power disturbances
last less than 4 seconds), reserving the battery
for longer outages, extending battery life and
improving overall UPS output reliability.
■
When used in a batteryless configuration,
provides the needed short-term DC energy
bridge to an engine generator.
How It Works:
The Liebert FS stores energy kinetically. When
needed, inertia of the spinning mass is immediately
converted to power. The Liebert FS is a functional
replacement or supplement for a bank of chemical
batteries. Like batteries, it charges from the two
terminal UPS DC bus and returns up to 190 kW per
module whenever the bus voltage drops below a
programmable threshold.
The flywheel itself is a high-speed, carbon fiber
composite cylinder rotating in a vacuum. The
flywheel and rotating group is fully levitated and
centered by patented 5-point magnetic levitation
system that minimizes drag and eliminates
mechanical bearings maintenance and replacement.
Its synchronous reluctance motor-generator
minimizes idling losses and standby power
consumption. Originally designed for hybrid
vehicles, the levitation system is very robust and
responsive to any jarring.
Upper Vacuum
Chamber
Breaker
Heat Exchanger
Data Collection
Module
Magnetic
Levitation
Controller
Flywheel
Housing
Coolant Pump
Casters
Power
Electronics
Display
Interface Board
Inductor-Filter
Upper Radial
Electromagnet
Lower Radial
Electromagnet
Axial
Electromagnet
Patented
Molecular
Vacuum
Sleeve
2” Thick Steel
Containment
Vessel
Synchronous
Reluctance 4
Pole M-G
Rotor
Lower Vacuum
Chamber
Coolant
Passages
Carbon Fiber
Composite
Flywheel
Motor-Generator
Stator