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System benefits include – Emerson Liebert Power Solutions User Manual

Page 29

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EN

TERP

R

ISE

UPS

4

29

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