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Energies 2017,10, 1217
Figure33.Aflywheelused in theFormulaOneracingkineticenergyrecoverysystem(KERS).
Figure34. Basicflywheel components. Theflywheel is suspended in tishosingbybearings, and is
connectedtoamotor-generator tostoreandsupplyenergy[61].
Table12.Characteristicsofdifferentmaterialsusedforflywheels [62].
Material Density(kg/m3) Tensile
Strength(mpa) MaxEnergy
Density (mj/kg) Cost (USD/kg)
Monolithic
material 4340steel 7700 1520 0.19 1
Composites E-glass 2000 100 0.05 11
S2-glass 1920 1470 0.76 24.6
CarbonT1000 1520 1950 1.28 101.8
CarbonAS4C 1510 1650 1.1 31.3
Currently,nosingleenergysourcecanprovidethe idealcharacteristics, i.e.,highvalueofboth
powerandenergydensity. Table13showsarelativecomparisonof theenergystorages todemonstrate
this fact.Hybridenergystoragescanbeusedtocounter thisproblembyemployingonesource for
highenergydensityandanother forhighpowerdensity.Differentcombinationsarepossible tocreate
thishybridsystem. It canbeacombinationofbatteryandultracapacitor,batteryandflywheel,or fuel
cell andbattery [4]. Table14showsthestoragesystemsusedbysomecurrentvehicles.
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Emerging Technologies for Electric and Hybrid Vehicles
- Title
- Emerging Technologies for Electric and Hybrid Vehicles
- Editor
- MDPI
- Location
- Basel
- Date
- 2017
- Language
- English
- License
- CC BY-NC-ND 4.0
- ISBN
- 978-3-03897-191-7
- Size
- 17.0 x 24.4 cm
- Pages
- 376
- Keywords
- electric vehicle, plug-in hybrid electric vehicle (PHEV), energy sources, energy management strategy, energy-storage system, charging technologies, control algorithms, battery, operating scenario, wireless power transfer (WPT)
- Category
- Technik