Wherever it can be impractical or undesired to tightly control the speed from the prime mover, doubly fed electric equipment can be utilised as generators. With all the assistance of ability electronic devices, these can control the output frequency to some wished-for price more than a broader choice of generator https://kameronqwbfk.ouyawiki.com/800435/a_secret_weapon_for_air_purification_solutions