GKN Hybrid Power Gyrodrive Flywheel
Energy Storage System
CERAMIC HYBRID BEARINGS
STATOR AND BEARINGS
COOLED BY TRANSFORMER OIL
STATOR
MLC SECTION
SQUEEZE FORMED
ALUMINIUM CASTING
CARBON COMPOSITE ROTOR
CARBON COMPOSITE END CAP
GYRODRIVE FLYWHEEL – BRUSHLESS DC MOTOR / GENERATOR
120
80
Minimum Speed
Power (kW)
100
60
40
Energy (MJ)
5000
Maximum Power
120kW
1.60
Energy Storage
1.8 MJ
1.40
Operating Voltage
650-700 VDC
1.20
Operating Current
300 Amps
Maximum Operating
Speed
36000 RPM
Minimum Operating
Speed
15000 RPM
0.40
Efficiency
92%
0.20
Power density
2.2 kW/kg
Flywheel unit weight
55 kg
Vacuum pressure
<100 µbar
Expected life
20 years
0.80
Motoring Power (kW)
Generating Power (kW)
0
PERFORMANCE DATA
1.80
1.00
20
0
2.00
0.60
0.00
10000 15000 20000 25000 30000 35000 40000
Flywheel speed (RPM)
Energy
140
For further information please visit us at
www.gknhybridpower.com or e-mail us at
marketing.landsystems@gkn.com
GKN Hybrid Power Gyrodrive Flywheel
Energy Storage System
HOW DOES IT WORK?
Flywheel & Radiator
In a conventional mechanical driveline
When the driver brakes, a traction motor on one of the axles retards the
vehicle, generating electricity at the same time.
This electricity is used to charge the flywheel, spinning it at up to
~36,000 rpm.
When the driver accelerates, the system works in reverse and the energy
is drawn from the flywheel and converted back into electricity to power
the traction motor helping to accelerate the vehicle.
BRAKING
Power Electronics
In an electrical or electro hydraulic driveline
ACCELERATING
The flywheel controller can be connected directly into the power
electronics of the base system.
Instead of returning energy from lowering a boom, slewing, stopping etc
being burnt off in a resistor bank or hydraulic retarder, the power is used
directly to charge the flywheel.
POTENTIAL CONFIGURATION
PARALLEL HYBRID
Kinetic energy re-used
Diesel engine sized
for peak performance
SERIES HYBRID
Engine sized for average
power use
Peak power demands met
from flywheel
Kinetic energy re-used
Greater fuel saving
Savings in engine,
transmission and driveline
costs offset system costs
For further information please visit us at
www.gknhybridpower.com or e-mail us at
marketing.landsystems@gkn.com