ERNST ALEXANDERSON PDF

ERNST ALEXANDERSON PDF

Ernst F.W. Alexanderson, in full Ernst Frederik Werner Alexanderson, (born Jan. 25, , Uppsala, Swed.—died May 14, , Schenectady, N.Y., U.S.). Ernst Alexanderson ( – ); a Swedish-American electrical engineer, a pioneer of radio and television development; received US patents. The man who developed the high frequency generator that made this possible, and much more, was Dr. Ernst Alexanderson. Ernst Alexanderson. Alexanderson .

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Alexanderson, Ernst Frederik Werner (–) |

Alexanderson, IRE President,invented a self-exciting alternator. He also designed a series of high-frequency alternators for radio use.

Ernst Alexanderson was born in in Uppsala, Sweden, and graduated in engineering at the Royal Technical University in Stockholm in He spent a year taking advanced studies in electrical engineering in Germany before coming to the United States.

One of his first inventions was a self-exciting alternator which was the subject of a paper published by the American Alexancerson of Electrical Engineers AIEE in Subsequently, he erhst a modified repulsion motor for electric railway use, which he described in a AIEE paper.

Beginning inAlexanderson designed a series of high-frequency alternators for use in radio as sources alezanderson transmitter power which provided an alternative to spark and arc transmitters. One of his early radio alternators was employed by Reginald Fessenden for experiments with voice and music broadcasts from a station in Brant RockMA, in December A later and higher-powered radio alternator capable of 50 kW output designed by Alexanderson was installed in New Brunswick, NJ, in and used for transatlantic communication during World War I.

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The first of several kW Alexanderson radio alternators was located at the New Brunswick station alexanserson and served as the prototype for a long-wave radio network established by the Radio Corporation of America RCA following its formation in He became the second recipient of the IRE Medal of Honor in in recognition of his contributions to global radio communication.

He was president of the IRE during In August Alexanderson published etnst paper in the Proceedings of the IRE, where he noted that it already had “become generally known that a new highway for world traffic has been opened up through the development alexandersn transatlantic radio communication.

He provided some technical information on the kW radio alternator, the magnetic amplifier, and a multiple antenna which were key elements of his long-wave system. During the late ‘s and the ‘s, Alexanderson investigated short-wave propagation, radio facsimile, mechanical-scan televisionand radio altimeters. He demonstrated television in the home in using a rotating alexanderwon type receiver.

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He also studied and made inventions relating to electronic power conversion, direct-current power transmission, and gun-control systems. During World War II, he worked on analog computers for use with radar and developed military applications of alexadnerson amplidyne.

Alexanderson retired from GE in although he continued as a consultant to the company for several more years. His numerous inventions and other achievements gained him recognition as one of the most outstanding members of the electrical engineering profession during aalexanderson career of over a half century. He received more than United States patents, with the final one issued when he was Alexanderson died in at age Retrieved from ” https: Biographies People and organizations Engineers Power ernzt.