Editing Motor–generator (section)

===Flywheel-generator===
Another use is to buffer extreme loads on the power system.  For example, [[tokamak]] fusion devices impose very large peak loads, but relatively low average loads, on the electrical grid.  The [[DIII-D (tokamak)|DIII-D tokamak]] at [[General Atomics]], the [[Princeton Large Torus]] (PLT) at the [[Princeton Plasma Physics Laboratory]], and the [[Nimrod (synchrotron)|Nimrod synchrotron]] at the [[Rutherford Appleton Laboratory]] each used large [[flywheel]]s on multiple motor–generator rigs to level the load imposed on the electrical system:  the motor side slowly accelerated a large [[Flywheel energy storage|flywheel to store energy]], which was consumed rapidly during a fusion experiment as the generator side acted as a [[brake]] on the flywheel.  Similarly, the next generation U.S. Navy aircraft carrier [[Electromagnetic Aircraft Launch System#Energy-storage subsystem|Electromagnetic Aircraft Launch System (EMALS)]] will use a flywheel motor–generator rig to supply power instantaneously for aircraft launches at greater than the ship's installed generator capacity. In addition to the above specialized applications, flywheel-generator systems have been commercialized for use in [[Data_center|data centers]] as an adjunct or alternative to more conventional battery or generator-based [[Uninterruptible_power_supply |uninterruptible power supplies]] (UPS).<ref>{{cite web |title= Has flywheel power finally come of age? |url=https://www.datacenterdynamics.com/en/analysis/has-flywheel-power-finally-come-of-age/ |work= Datacenterdynamics.com |access-date=14 November 2023 |date= 8 July 2016 |first= David |last=Chernicoff }}</ref>