I had chosen an old film produced by US Department of Defense in 1961. I like it because the video was made with the specific purpose, that was to train the staff. Please view the video below...
The following topics were discussed...
1. The theory of .. Generation of EMF through the movement of a conductor in a field of magnetic flux.
2. A simple generator with a single loop.
3. The formula of the instantaneous EMF, e= BlV Sin The angle.
4. The operation of an armature.
5. Converting the AC within the armature to DC output.
6. Making the DC output smoother by adding additional poles and loops.
7. Prevention of sparking by positioning the brushes in the neutral plain.
8. The Armature Reaction and its effects.
9. Creation of magnetic fields and different methods to excite the field, separately excited and self excited.
10. The different way the fields are connected, series, parallel and compund.
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