Egger electric motor
The Egger electric motor is a historical electric motor that was developed by Martin Egger , Jesuit priest and professor of physics at the grammar school in Mariaschein in northern Bohemia , around 1875. In contrast to today's common electric motors - consisting of a rotor and stator - this type of electric motor is based on the functional principle of a steam engine to convert a translational movement into a rotational movement . Instead of the pistons commonly used in steam engines , several pull magnets are used.
The motor consists of four two-legged pull magnets, which are activated alternately by means of a commutator and attract the associated yoke . This movement is converted into a rotational movement via two connecting rods and a crankshaft , as is also common in today's piston engines . To compensate for the jerky movement, there is a flywheel on the axis of rotation, on which the commutator required for electrical switching is also attached.
Due to the mechanically complex structure, the difficulty of not being able to achieve high speeds and the principle-related impossibility that this motor cannot be used as an electrical generator to convert mechanical into electrical energy, it was able to stand up to contemporary electrical machines such as Werner's from Siemens not enforce. With the exception of training models in some physical cabinets, this type of machine did not acquire any further economic importance.
Literature sources
- Johann Müller: Textbook of Physics and Meteorology, third volume . 8th revised and enlarged edition. 1881, p. 510 ( online ).
- R. Handmann: Report on Egger's electromagnetic motor. In: Journal of Applied electrical science, 1st year, . tape 1 . Munich 1879, p. 77 to 107 .
See also
Around 1838 Charles Grafton Page constructed an electric motor that also worked with the crank drive principle and equipped one of the first electrically powered rail vehicles with it in 1851 .
Individual evidence
- ↑ P. Martin Egger SJ (1832-1898) , queried on March 28, 2012