<s>
Single-phase	B-Algorithm
generator	I-Algorithm
(	O
also	O
known	O
as	O
single-phase	B-Algorithm
alternator	I-Algorithm
)	O
is	O
an	O
alternating	O
current	O
electrical	O
generator	O
that	O
produces	O
a	O
single	O
,	O
continuously	O
alternating	O
voltage	O
.	O
</s>
<s>
Single-phase	B-Algorithm
generators	I-Algorithm
can	O
be	O
used	O
to	O
generate	O
power	O
in	O
single-phase	O
electric	O
power	O
systems	O
.	O
</s>
<s>
Therefore	O
,	O
single-phase	B-Algorithm
generators	I-Algorithm
are	O
found	O
in	O
applications	O
that	O
are	O
most	O
often	O
used	O
when	O
the	O
loads	O
being	O
driven	O
are	O
relatively	O
light	O
,	O
and	O
not	O
connected	O
to	O
a	O
three-phase	O
distribution	O
,	O
for	O
instance	O
,	O
portable	O
engine-generators	B-Algorithm
.	O
</s>
<s>
Larger	O
single-phase	B-Algorithm
generators	I-Algorithm
are	O
also	O
used	O
in	O
special	O
applications	O
such	O
as	O
single-phase	O
traction	O
power	O
for	O
railway	O
electrification	O
systems	O
.	O
</s>
<s>
A	O
basic	O
design	O
,	O
called	O
elementary	B-Algorithm
generator	I-Algorithm
,	O
is	O
to	O
have	O
a	O
rectangular	O
loop	O
armature	O
to	O
cut	O
the	O
lines	O
of	O
force	O
between	O
the	O
north	O
and	O
south	O
poles	O
.	O
</s>
<s>
More	O
poles	O
can	O
also	O
be	O
added	O
to	O
single-phase	B-Algorithm
generator	I-Algorithm
to	O
allow	O
one	O
rotation	O
to	O
produce	O
more	O
than	O
one	O
cycle	O
of	O
AC	O
output	O
.	O
</s>
<s>
A	O
basic	O
design	O
of	O
revolving	O
field	O
single-phase	B-Algorithm
generator	I-Algorithm
is	O
shown	O
on	O
the	O
right	O
.	O
</s>
<s>
As	O
the	O
4	O
coils	O
are	O
wired	O
in	O
series	O
and	O
their	O
outputs	O
are	O
"	O
in	O
phase	O
"	O
,	O
the	O
AC	O
output	O
of	O
this	O
single-phase	B-Algorithm
generator	I-Algorithm
will	O
have	O
4	O
times	O
the	O
voltage	O
of	O
that	O
generated	O
by	O
each	O
individual	O
coil	O
.	O
</s>
<s>
Single-phase	B-Algorithm
generators	I-Algorithm
that	O
people	O
are	O
familiar	O
with	O
are	O
usually	O
small	O
.	O
</s>
<s>
Although	O
most	O
of	O
wind	O
turbines	O
use	O
three-phase	O
generators	O
,	O
single-phase	B-Algorithm
generators	I-Algorithm
are	O
found	O
in	O
some	O
of	O
the	O
small	O
wind	O
turbine	O
models	O
with	O
rated	O
power	O
outputs	O
of	O
up	O
with	O
55kW	O
.	O
</s>
<s>
The	O
early	O
generators	O
for	O
those	O
single-phase	O
traction	O
networks	O
are	O
single-phase	B-Algorithm
generators	I-Algorithm
.	O
</s>
<s>
In	O
the	O
early	O
development	O
of	O
hydroelectricity	O
,	O
single-phase	B-Algorithm
generators	I-Algorithm
played	O
an	O
important	O
role	O
in	O
demonstrating	O
the	O
benefits	O
of	O
alternating	O
current	O
.	O
</s>
<s>
In	O
1891	O
,	O
a	O
3,000	O
volts	O
and	O
133Hz	O
single-phase	B-Algorithm
generator	I-Algorithm
of	O
100	O
horsepower	O
was	O
installed	O
at	O
Ames	O
Hydroelectric	O
Generating	O
Plant	O
which	O
was	O
belt-connected	O
with	O
Pelton	O
water	O
wheel	O
.	O
</s>
<s>
A	O
20kW	O
single-phase	B-Algorithm
generator	I-Algorithm
was	O
direct-connected	O
to	O
a	O
Pelton	O
water	O
wheel	O
to	O
generate	O
electricity	O
enough	O
to	O
power	O
light	O
loads	O
.	O
</s>
<s>
The	O
other	O
four	O
are	O
single-phase	B-Algorithm
generators	I-Algorithm
are	O
connected	O
to	O
Pelton	O
turbines	O
which	O
have	O
combined	O
capacity	O
of	O
52	O
MW	O
to	O
supply	O
the	O
German	O
15	O
kV	O
AC	O
railway	O
electrification	O
.	O
</s>
<s>
Two	O
out	O
of	O
its	O
14	O
turbines	O
are	O
connected	O
to	O
two	O
single-phase	B-Algorithm
generators	I-Algorithm
to	O
supply	O
Amtrak	O
's	O
25	O
Hz	O
traction	O
power	O
system	O
.	O
</s>
<s>
An	O
installation	O
at	O
St.	O
Louis	O
Municipal	O
Electric	O
Power	O
Plant	O
in	O
the	O
1900s	O
was	O
an	O
example	O
of	O
using	O
steam	O
engines	O
with	O
single-phase	B-Algorithm
generators	I-Algorithm
.	O
</s>
<s>
The	O
St.	O
Louis	O
plant	O
used	O
compound	O
steam	O
engine	O
to	O
drive	O
a	O
100kW	O
single-phase	B-Algorithm
generator	I-Algorithm
which	O
produced	O
current	O
at	O
rated	O
power	O
of	O
1,150	O
volts	O
.	O
</s>
<s>
A	O
special	O
set	O
of	O
single-phase	B-Algorithm
generators	I-Algorithm
with	O
steam	O
turbines	O
at	O
Waterside	O
Generating	O
Station	O
in	O
New	O
York	O
City	O
in	O
1938	O
was	O
an	O
example	O
of	O
such	O
generation	O
and	O
distribution	O
systems	O
.	O
</s>
<s>
The	O
single-phase	B-Algorithm
generators	I-Algorithm
were	O
eventually	O
retired	O
in	O
the	O
late	O
1970s	O
due	O
to	O
concerns	O
of	O
a	O
turbine	O
failure	O
in	O
another	O
station	O
.	O
</s>
<s>
Neckarwestheim	O
I	O
in	O
Neckarwestheim	O
is	O
a	O
unique	O
nuclear	O
power	O
plant	O
in	O
that	O
it	O
is	O
equipped	O
with	O
high-capacity	O
single-phase	B-Algorithm
generators	I-Algorithm
to	O
supply	O
Deutsche	O
Bahn	O
railway	O
with	O
specific	O
AC	O
voltage	O
at	O
frequency	O
of	O
16	O
2/3Hz	O
.	O
</s>
