Generators are divided into DC generators and alternator.
Alternator is divided into synchronous generator and asynchronous generator (seldom used).
Alternator can also be divided into single-phase generator and three-phase generator.
There are many kinds of generators. In principle, it is divided into synchronous generator, asynchronous generator, single-phase generator and three-phase generator. It is divided into turbogenerator, hydro generator, diesel generator, gasoline generator and so on. From energy sources, it can be divided into thermal power generators, hydro generators, etc.