From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Diagram and explanation of the effects of increased speed on current and magnetic flux in an electrical dynamo or motor.
| Identifier | ExFiles\Box 3\5\ 05-page084 | |
| Date | 30th July 1919 guessed | |
| Fig. 2. W. (2) N+ Rotation M- S. FIG.2. If the speed is still further increased, there is a slight further increase in current, which will sweep the flux still further around. Considering section cd, of the winding, no flux from the North Pole now cuts this, but current returning through Armature from [handwritten: a] [strikethrough: the] brush passes through resistance and section cd in parallel, the current in the resistance is now reversed. A further increase of speed and current results in flux from the leading S.Pole tip cutting section cd, thus reversing the E.M.F. in it and increasing the current in 423 | ||