Perfesser_Bear
Dynamo Field Coils
Massive Electromagnets to Charge the Generator
These large coils (perhaps a foot in diameter and 2½ feet tall) created the magnetic field in which the armature (bottom, center) rotated. When starting the dynamo, one would need to attach a battery to the Field Coils to create the initial magnetic field. Once the dynamo was running, the commutator kept the coils charged.
Massachusetts Institute of Technology (MIT), Cambridge, MA
Dynamo Field Coils
Massive Electromagnets to Charge the Generator
These large coils (perhaps a foot in diameter and 2½ feet tall) created the magnetic field in which the armature (bottom, center) rotated. When starting the dynamo, one would need to attach a battery to the Field Coils to create the initial magnetic field. Once the dynamo was running, the commutator kept the coils charged.
Massachusetts Institute of Technology (MIT), Cambridge, MA