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Our technology

The principle of the flywheel is based on the reversible conversion of kinetic energy (rotating mass) into electrical energy.


If this principle has existed since Antiquity, LEVISYS has been able to add cutting-edge technology to ensure optimum efficiency and reduce electrical and mechanical losses to a level never reached before.


Today, LEVISYS steering wheels offer 97% efficiency thanks to several major innovations.

  • A passive magnetic levitation which overcomes any friction usually observed on bearings.



  • Multi-level power electronics , developed jointly with our partner CIRTEM which provides an AC or DC connection.


  • A very high efficiency electric motor that allows charging and discharging in the best conditions with a response time of a few milliseconds.


  • A highly integrated architecture of all components for better availability of the machine.

A carbon fiber rotor , developed jointly with Airbus Industries® by a joint patent, whose rotor design provides an extremely high energy density.

  • Passive magnetic levitation which, unlike active levitation, significantly improves the yield.


  • Motor-generator design allowing better electrical efficiency.


  • Mechanical architecture reducing components and optimizing the service life of the assembly: LEVISYS flywheels can now perform more than 500,000 cycles (charge / discharge) with extremely low maintenance.


  • No external cooling system


  • High energy density


All of these innovations contribute to bringing LEVISYS flywheels unparalleled performance in stationary inertial storage.



  • Power : 10 kW or 40 kW .


  • Energy : 10 kW.h


  • Response time ( charge / discharge ): <40 ms


  • Lifespan : 500,000 cycles


  • Self discharge :> 3 weeks


  • Efficiency : 97% (including power electronics)


  • Dimensions : 1350 x 1450 mm


  • Voltage : 650 V DC or 400 VA C


The origin of this technology  

The creation of the industrial prototype

The creation of the industrial prototype

The creation of the industrial prototype

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