On the theory of the maintenance of electric currents by mechanical work without the use of permanent magnets | Zendy

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On the theory of the maintenance of electric currents by mechanical work without the use of permanent magnets

Author(s) -

James Clerk Maxwell

Publication year - 1867

Publication title -

proceedings of the royal society of london

Language(s) - English

Resource type - Journals

eISSN - 2053-9126

pISSN - 0370-1662

DOI - 10.1098/rspl.1866.0089

Subject(s) - electromagnet , commutator , magnet , wheatstone bridge , mechanical engineering , electrical engineering , work (physics) , siemens , engineering , physics , nuclear magnetic resonance , voltage , quantum mechanics , lie conformal algebra , lie algebra , resistor

The machines lately brought before the Royal Society by Mr. Siemens and Professor Wheatstone consist essentially of a fixed and a moveable electromagnet, the coils of which are put in connexion by means of a commutator. The electromagnets in the actual machines have cores of soft iron, which greatly increase the magnetic effects due to the coils; but, in order to simplify the expression of the theory as much as possible, I shall begin by supposing the coils to have no cores, and, to fix our ideas, we may suppose them in the form of rings, the smaller revolving within the larger on a common diameter.

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