#generator  engine that converts mechanical energy into electrical energy by electromagnetic induction
  supertype:  engine  motor that converts thermal energy to mechanical work
  part:  brush.electrical_device  rotor_coil  stator_coil
  subtype:  alternator  an old term for an electric generator that produces alternating current (especially in automobiles)
  subtype:  dynamo  generator consisting of a coil (the armature) that rotates between the poles of an electromagnet (the field magnet) causing a current to flow in the armature
  subtype:  magneto__magnetoelectric_machine__magnetoelectricmachine  a small dynamo with a secondary winding that produces a high voltage enabling a spark to jump between the poles of a spark plug in a gasoline engine
  subtype:  turbogenerator  generator consisting of a steam turbine coupled to an electric generator for the production of electric power
  subtype:  aerogenerator__windmill__wind_generator  generator that extracts usable energy from winds

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