Design of a stabilised flywheel unit for efficient energy storage

•Advantages of storing energy in rotating flywheel.•New approach to designing the storage unit.•Maxwell and Lorentz levitation forces and magnetic support.•Stabilisation in all five degrees of Freedom. Authors developed a unit with rotating flywheel for storing energy and thus suppressing the discre...

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Bibliographic Details
Published in:Journal of energy storage 2019-08, Vol.24, p.100765, Article 100765
Main Authors: Šonský, Jiří, Tesař, Václav
Format: Article
Language:English
Subjects:
Energy storage
Flywheel
Lorenz force
Stabilisation
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Summary:•Advantages of storing energy in rotating flywheel.•New approach to designing the storage unit.•Maxwell and Lorentz levitation forces and magnetic support.•Stabilisation in all five degrees of Freedom. Authors developed a unit with rotating flywheel for storing energy and thus suppressing the discrepancy between electricity supply and demand. The target of the development was to minimise the energy extracted from the flywheel for stabilisation of remaining all five free degrees of freedom. In the described proof-of-concept laboratory model, the levitation combines Maxwell (electromagnetic) and Lorentz (current in magnetic field) lifting forces. While the so far existing storage units spend on the stabilisation much larger power, in the authors’ proof-of-concept design sufficed for the stabilisation only hundreds of milliwatts - not increasing significantly with increased flywheel size.
ISSN:2352-152X
2352-1538
DOI:10.1016/j.est.2019.100765