Majenereta ndi zida zamakaniko zomwe zimasintha mitundu ina ya mphamvu kukhala mphamvu zamagetsi. Zimayendetsedwa ndi turbine yamadzi, turbine ya nthunzi, injini ya dizilo kapena makina ena amphamvu ndipo zimasintha mphamvu yopangidwa ndi kuyenda kwa madzi, kuyenda kwa mpweya, kuyaka kwa mafuta kapena kugawanika kwa nyukiliya kukhala mphamvu zamakaniko zomwe zimaperekedwa ku jenereta, yomwe imasinthidwa kukhala mphamvu zamagetsi.
Majenereta amagwiritsidwa ntchito kwambiri popanga mafakitale ndi ulimi, chitetezo cha dziko, sayansi ndi ukadaulo komanso moyo watsiku ndi tsiku. Majenereta amabwera m'njira zosiyanasiyana, koma mfundo zawo zogwirira ntchito zimachokera ku lamulo la kulowetsa magetsi ndi lamulo la mphamvu yamagetsi. Chifukwa chake, mfundo yayikulu yomangira kwake ndi iyi: yokhala ndi zida zoyenera zamaginito ndi zoyendetsera magetsi kuti apange dera lamaginito ndi dera, kuti apange mphamvu yamagetsi, kuti akwaniritse cholinga chosinthira mphamvu. Jenereta nthawi zambiri imakhala ndi stator, rotor, end cap ndi bearing.
Stator imakhala ndi pakati pa stator, kupindika kwa waya, chimango ndi ziwalo zina zomwe zimamanga ziwalozi.
Rotor imapangidwa ndi chozungulira cha rotor (kapena magnetic pole, magnetic choke), mphete yoteteza, mphete yapakati, mphete yotsetsereka, fan ndi shaft yozungulira, ndi zina zotero.
Chophimba ndi chotchingira cha jenereta chidzakhala stator ya jenereta, rotor imalumikizidwa pamodzi, kotero kuti rotor ikhoza kuzungulira mu stator, kuchita kayendedwe kodula mzere wa mphamvu ya maginito, motero kupanga mphamvu yoyambitsa, kudzera mu lead yomaliza, yolumikizidwa mu loop, idzapanga mphamvu yamagetsi.
