| RefNo | PP/10/20 |
| Previous numbers | PP/42/20 |
| Level | File |
| Title | Paper, 'Note on the theory of the alternate current dynamo' by John Hopkinson |
| Date | 1887 |
| Description | Hopkinson writes: 'According to the accepted theory of the alternate current dynamo, the equation of electric current in the armature is γy + Ry = periodic function of t, where γ is a constant coefficient of self-induction. This equation is not strictly true, inasmuch as γ is riot in general constant, but it is a most useful approximation. My present purpose is to indicate how the values of γ and of the periodic function representing the electromotive force can be calculated in a machine of given configuration.'
Annotations in pencil and ink throughout. Includes one diagram of Hopkinson's proposed dynamo.
Subject: Physics / Electricity
Received 17 February 1887. Read 10 March 1887.
A version of this paper was published in volume 42 of the Proceedings of the Royal Society as 'Note on the theory of the alternate current dynamo'. |
| Extent | 6p |
| Format | Manuscript |
| Diagram |
| PhysicalDescription | Ink and graphite pencil on paper |
| Digital images | View item on Science in the Making |
| AccessStatus | Open |
| RelatedMaterial | DOI: 10.1098/rspl.1887.0032 |
Fellows associated with this archive
| Code | PersonName | Dates |
| NA8063 | Hopkinson; John (1849 - 1898); electrical engineer | 1849 - 1898 |