IEEE Power & Energy Magazine - Spanish - January/February 2021 - 104

figura 5. El diagrama de cableado de la dínamo Brush n.º 7. (Adaptado de Silvanus P. Thompson, Dynamo-Electric Machinery (Maquinaria dinamoeléctrica),
2da ed. Londres: E. & F.N. Spon, 1886).

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)

figura 6. (a) La lámpara de arco de Victor Serrin, alrededor de 1860. (Fuente:
A. Guillemin, The Application of Physical Forces (La aplicación de las fuerzas
físicas). Londres: Macmillan, 1877). Los reguladores de arco complejos, como los
de Serrin, se volvieron obsoletos cuando las lámparas de arco Brush entraron en
el mercado. Lámparas de arco y accesorios de Brush en 1880: (b) una lámpara de
arco con dos juegos de carbono, (c) un paquete de 25 carbonos, (d) una lámpara
con un solo juego de carbono, (e) una lámpara de enfoque para proyecciones mediante linternas mágicas, (f) una lámpara de faro para uso en reflectores en barcos
y locomotoras, (g) un accesorio de dial para controlar cuántas lámparas en serie
están encendidas, y (h) una lámpara ornamental. (Fuente: The Brush Electric Light
(La luz eléctrica de Brush). Cleveland, Ohio: Brush Electric Company, 1881).
104	

ieee power & energy magazine	

metralmente opuestos del conmutador.
Cada par de bobinas era independiente
de los otros pares. La popular dínamo
n.º 7 tenía cuatro pares de bobinas y un
conmutador con cuatro anillos de metal separados para acomodarlos; cada
anillo constaba de dos segmentos casi
semicirculares separados por huecos
diseñados para permitir el correcto
funcionamiento de las escobillas colectoras de corriente (figura 5). Todas las
dínamos anteriores a Brush disponían
de bobina cerrada.
La sofisticación del invento de
Brush, cuando tenía 27 años y era licenciado en ingeniería de minas, se
puso de manifiesto en una reunión del
Instituto Estadounidense de Ingenieros
Eléctricos el 22 de mayo de 1891, en la
que se presentó la conferencia " A Study
of an Open-Coil Arc Dynamo " (Un estudio de una dínamo de arco de bobina
abierta). El artículo de 14 páginas, que
contenía muchos datos experimentales,
no pudo explicar exactamente por qué
la dínamo de bobina abierta fue tan
exitosa para alimentar luces de arco. A
continuación se presenta un extracto:
De todas las máquinas dínamo que se utilizan en la actualidad, quizás la acción interna
de ninguna se comprenda tan
poco como la de las máquinas
de iluminación de tipo arco de
la clase de armadura de bobina
abierta. Gran parte de la normativa y el comportamiento general de estas máquinas parece
totalmente diferente de lo que
uno esperaría naturalmente de
un examen superficial del diseño y la construcción, y es con la
idea de esclarecer este aparente
misterio que se emprendió la investigación que se describirá...
¿La máquina es adecuada para
iluminación de tipo arco? El
gran número de estas dínamos
en uso diario en todas partes del
mundo es una respuesta práctica que debe tener más peso que
cualquiera que pueda sugerir un
estudio teórico de la máquina...
Es de lamentar que el tiempo no
haya permitido medir la fuerza
enero/febrero 2021



IEEE Power & Energy Magazine - Spanish - January/February 2021

Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - Spanish - January/February 2021

Contents
IEEE Power & Energy Magazine - Spanish - January/February 2021 - Cover1
IEEE Power & Energy Magazine - Spanish - January/February 2021 - Cover2
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