Power & Energy Magazine - Spanish - May/June 2019 - 15

en inglés), notó que, en el caso de
drehstrom, o sistema de CA trifásico,
"Cada cable actuará como el cable de
retorno para los otros dos en múltiple,
por lo que solo se necesitan tres cables,
aunque existan tres corrientes distintas". (Ver [2] y [3].)
Siempre que sea posible, los partidarios de la nueva clase de sistema polifásico destacaron con orgullo la necesidad de que solo haya tres terminales.
Michael Dolivo-Dobrowolsky, el electricista principal de Allgemeine Elektricitäts-Gesellschaft en Berlín y el
creador del primer motor de inducción
trifásico de jaula de ardilla en 1889,
dejó que las modestas terminales triples de su espectacular pieza hablaran
por sí mismas (gráfico 3). En una mesa
de demostración para la nueva clase trifásica (gráfico 4), Dolivo-Dobrowolsky
presentó la conexión de tres cables más
simple de la manera más clara posible
para cualquier visitante.

mayo/junio 2019

Hay un comentario final sobre las
preferencias polifásicas específicas de
Tesla. Como es de conocimiento general, tanto la Westinghouse Company
como su consultor principal Nikola
Tesla estuvieron, durante mucho tiempo, a favor de las soluciones bifásicas.
En consecuencia, para la central eléctrica Adams en Niagara Falls, Nueva
York, se recomendaron generadores
bifásicos en 1893, que se pusieron en
funcionamiento en 1895. Los generadores trifásicos tuvieron que esperar
hasta 1903, cuando se llevó a cabo la
primera ampliación de la planta. Por
otro lado, el legendario sistema de
transmisión de energía a larga distancia desde Lauffen/Neckar a Frankfurt/
Main, encargado en 1891, ya estaba en
funcionamiento con CA trifásica interconectada, al igual que la mayoría de
los proyectos para centrales eléctricas
que le siguieron en Europa. En conclusión, la afirmación de Cunningham

en la leyenda de su gráfico 6 debe ser
reconsiderada y abierta a los méritos
de otros pioneros de soluciones polifásicas, en particular respecto de la CA
trifásica interconectada.
-Gerhard Neidhöfer

Respuesta del autor
Estoy de acuerdo con las inquietudes
de Gerhard Neidhöfer, porque la leyenda en el gráfico 6 podría ser engañosa.
Lo que intentó decir es que los comentarios de Tesla fueron precursores del
futuro y no que las futuras tendencias
fueran necesariamente el trabajo de
Tesla. (De hecho, la transmisión trifásica utilizada en Niagara fue producto del rival de Westinghouse, General
Electric, diseñado principalmente por
Steinmetz y sus asociados). Mi agradecimiento y reconocimiento a Neidhöfer
por su precisa lectura de mi ambiguo
comentario que había pasado por alto.
-Joseph J. Cunningham

ieee power & energy magazine

15


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Power & Energy Magazine - Spanish - May/June 2019

Table of Contents for the Digital Edition of Power & Energy Magazine - Spanish - May/June 2019

Contents
Power & Energy Magazine - Spanish - May/June 2019 - Cover1
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Power & Energy Magazine - Spanish - May/June 2019 - Contents
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Power & Energy Magazine - Spanish - May/June 2019 - Cover3
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