DC generator. Computer illustration showing the structure of a typical DC generator. DC generators produce electricity by converting mechanical energy to direct electrical power based on Faraday's law of electromagnetic induction. According to this law, when a conductor moves in a magnetic field it cuts through lines of magnetic flux, which induces an electromotive force in the conductor. The essential parts of the DC generator shown here are: 1) ball bearing; 2) turbine; 3) stator (magnets); 4) rotor; 5) ironless winding; 6) commutator; 7) brush.