Marcel Deprez

Marcel Deprez ( born December 19, 1843 in Aillant -sur- Milleron, Loiret; † October 16, 1918 in Vincennes ) was a French physicist and electrical engineer. He is considered a pioneer in the transmission of electrical energy by overhead cables.

Life

In the 1870s and 1880s he had considerable influence with his opinion that AC for power transmission does not own for long stretches. Because it was the technicians until then did not succeed to develop the necessary AC motors, he continued to direct current. Experiments that he carried out here to prove his theory, were successful.

At the International Electricity Exhibition in Paris in 1881 Deprez led for the first time before a device for distributing electrical energy. Two direct current dynamos supplied 27 stationed at the Palace of industrial equipment, including a band saw, machine for sewing and folding as well as incandescent and arc lamps that operated independently via a 1.8 km long pipeline. At a conference on June 15, 1882 at the National Conservatory of Arts and Professions, it increased in a demonstration submitted by the line power output to 3kW.

Along with Oskar von Miller he led in 1882 by the first direct current transmission Mies Bach Munich. Maximum direct voltage of 2 kV was generated in Miesbach 57 km away and into the Munich Glass Palace over a telegraph line. A steam engine in Miesbacher mine operation for this purpose to a generator, which in Munich a motor Gramme drive the drive a pump for an artificial waterfall.

More direct current transmission are of Deprez between Grenoble and Vizille ( 14 km ) and in 1885 between Paris and Creil (50 km) with improved efficiency known.

With Jacques- Arsène d' Arsonval galvanometer Deprez developed in 1881 continues. In addition to his work in the field of electrical engineering, he was also interested in ballistics. Yet his work for pressure measurement of powder gases in 1871 are particularly worth mentioning. In 1886 he became professor of electrical engineering at the Conservatoire National des Arts et Métiers and a member of the Academy of Sciences in Paris.