<s>
A	O
turbo	B-Algorithm
generator	I-Algorithm
is	O
an	O
electric	O
generator	O
connected	O
to	O
the	O
shaft	O
of	O
a	O
steam	O
turbine	O
or	O
gas	O
turbine	O
for	O
the	O
generation	O
of	O
electric	O
power	O
.	O
</s>
<s>
Large	O
steam-powered	O
turbo	B-Algorithm
generators	I-Algorithm
provide	O
the	O
majority	O
of	O
the	O
world	O
's	O
electricity	O
and	O
are	O
also	O
used	O
by	O
steam-powered	O
turbo-electric	O
ships	O
.	O
</s>
<s>
The	O
first	O
Hungarian	O
water	O
turbine	O
was	O
designed	O
by	O
the	O
engineers	O
of	O
the	O
Ganz	O
Works	O
in	O
1866	O
;	O
industrial-scale	O
production	O
with	O
dynamo	B-Language
generators	O
started	O
only	O
in	O
1883	O
.	O
</s>
<s>
Engineer	O
Charles	O
Algernon	O
Parsons	O
demonstrated	O
a	O
DC	O
steam-powered	O
turbo	B-Algorithm
generator	I-Algorithm
using	O
a	O
dynamo	B-Language
in	O
1887	O
,	O
and	O
by	O
1901	O
had	O
supplied	O
the	O
first	O
large	O
industrial	O
AC	O
turbo	B-Algorithm
generator	I-Algorithm
of	O
megawatt	O
power	O
to	O
a	O
plant	O
in	O
Eberfeld	O
,	O
Germany	O
.	O
</s>
<s>
Turbo	B-Algorithm
generators	I-Algorithm
were	O
also	O
used	O
on	O
steam	O
locomotives	O
as	O
a	O
power	O
source	O
for	O
coach	O
lighting	O
and	O
water	O
pumps	O
for	O
heating	O
systems	O
.	O
</s>
<s>
Turbo	B-Algorithm
generators	I-Algorithm
are	O
used	O
for	O
high	O
shaft	O
rotational	O
speeds	O
,	O
typical	O
of	O
steam	O
and	O
gas	O
turbines	O
.	O
</s>
<s>
The	O
rotor	O
of	O
a	O
turbo	B-Algorithm
generator	I-Algorithm
is	O
a	O
non-salient	O
pole	O
type	O
usually	O
with	O
two	O
poles	O
.	O
</s>
<s>
The	O
normal	O
speed	O
of	O
a	O
turbo	B-Algorithm
generator	I-Algorithm
is	O
1500	O
or	O
3000	O
rpm	O
with	O
four	O
or	O
two	O
poles	O
at	O
50Hz	O
(	O
1800	O
or	O
3600	O
rpm	O
with	O
four	O
or	O
two	O
poles	O
at	O
60Hz	O
)	O
.	O
</s>
<s>
The	O
rotating	O
parts	O
of	O
a	O
turbo	B-Algorithm
generator	I-Algorithm
are	O
subjected	O
to	O
high	O
mechanical	O
stresses	O
because	O
of	O
the	O
high	O
operation	O
speed	O
.	O
</s>
<s>
To	O
make	O
the	O
rotor	O
mechanically	O
resistant	O
in	O
large	O
turbo-alternators	B-Algorithm
,	O
the	O
rotor	O
is	O
normally	O
forged	O
from	O
solid	O
steel	O
and	O
alloys	O
like	O
chromium-nickel-steel	O
or	O
chromium-nickel-molybdenum	O
are	O
used	O
.	O
</s>
<s>
The	O
stator	O
of	O
large	O
turbo	B-Algorithm
generators	I-Algorithm
may	O
be	O
built	O
of	O
two	O
or	O
more	O
parts	O
while	O
in	O
smaller	O
turbo-generators	O
it	O
is	O
built	O
up	O
in	O
one	O
complete	O
piece	O
.	O
</s>
<s>
Based	O
on	O
the	O
air-cooled	O
turbo	B-Algorithm
generator	I-Algorithm
,	O
gaseous	O
hydrogen	O
first	O
went	O
into	O
service	O
as	O
the	O
coolant	O
in	O
a	O
hydrogen-cooled	O
turbo	B-Algorithm
generator	I-Algorithm
in	O
October	O
1937	O
,	O
at	O
the	O
Dayton	O
Power	O
&	O
Light	O
Co	O
.	O
in	O
Dayton	O
,	O
Ohio	O
.	O
</s>
