Turbo generator

250 kW steam turbine generator set (1910)
500 MW Siemens multi stage steam turbine with generator set (rear, red)
Parsons first 1 MW steam turbine driven "Turbogenerator" (made 1900 for a plant in Elberfeld, Germany)
Ottó Bláthy in the armature of a Ganz turbo generator (1904)
Small RP4 steam turbo generator set 500W/24V for a steam locomotive: alternator (left) + turbine (right)

A turbo generator is an electric generator connected to the shaft of a turbine (water, steam, or gas) for the generation of electric power. Large steam-powered turbo generators provide the majority of the world's electricity and are also used by steam-powered turbo-electric and gas-turbine-electric powered ships.

Small turbo-generators driven by gas turbines are often used as auxiliary power units (APU, mainly for aircraft).