engineering
papers
conditions.
Only
the
non-synchronous
type
of
itself
with
the
same
current
as
before,
the
windings,
resultant
magnetic
poles
or
cor-
responding
currents
the
true
power
to
the
apparent
power
expected.
This
power
is
proportional
from
a
will
start.
As
motor
No,
1
circuits
closed,
will
give
full
speed.
But
the
power
resistance in
part
can
give
trouble.
The
best
the
straight
series
type.
The
any
extent
desired.
primary
circuit
switches
in
series
on
the
applied
to
advantage.
regulating
from
100
leading
to
zero.
It
desired,
it
more
economically
the
damper
rather
than
to
synchronous
be
designed
with
the
possible
limits.
The
following
again
built
up
in
by
current
under
all
increase
the
loss
the
armature.
If
the
be
200
volts,
for
instance,
which
the
field
induc-
tion,
and
thus
Further,
this
great
cross-induction
\o
V
p
IQI
ooj
o
IO/QI
o
an ele-
quite
equal
to
six-phase
combinations
shown
in
Figs.
1
1
and
AC
and
BD
give
larger
single-phase
ratings
than
between the
all
instants
grounding
of
the
previously
to
building
these
machines,
but
on
machines
of
smaller
capacity
it
had
not
developed
destructive
tendencies.
then
decided
to
take
half the
fear
future
trouble
from
this
source.
It
is
interesting
to
of
the
principles
of
unipolar
machines;
neither
is
load,
and
or base
However,
and
heating
eat
away
the
enclosed
air
inlets
to
the
machine,
volt,
used,
As a
there
was
several
years'
wear
in
earth
along
a
great
circle.
Con-
sidering
that
there
are
brushes
bearing
on
each
ring
at
intervals
a
local
magnetic
tisms
per
coil
should
be
tend
to
weaken
the
value.
In
conse-
quence,
any
flashing
tendency
would
be
proportionately
re-
duced.
one so
interpoles.
However,
for
the
relatively
low
speeds
represented
by
much
by
the
short
cutting
culated.
During
the
period
of
commutation
the
armature
ooil
is
short
circuited
and
has
the
current
poetically
at
then considered.
in the
of
Fig.
8.
In
this
adjacent
slots,
plus
the
flux
crossing
at
the
top
of
the
slots.
The
interpolar
=
entire
slot
flux
in
per
in
fore
be
modified
This flux
can either
the
practically
and
end
winding
fluxes
only.
If
the
brushes
are
shifted
in the slots and end
windings. Consequently,
the commutation
can be
In
or forwards
this
field
will
be
reversed
pass
under
a
flux
will
also
be
practically
constant,
although
it
may
be
slightly
accomp-
lished
by
means
of
a
value
about
equal
to
coils
has
quite
an
influence
in
litrilting
the
short
face
which
must
be
considered,
and
not
that
of
the
brush
itself,
which
usually
the
pulsation*
in
voltage,
beyond
which
the
current
set
up
by
them
may
be
harmful.
A
very
crude
practise,
and
yet
possibly,
the
only
fairly
safe
one,
has
allowed on
"commutator,
depending
upon
the
direction
of
field
distortion.
main field
current
in
to take
still more
copper.
In
some
instances,
Again,
if
"one
ohm
re-
sistance
is
thrown
in
parallel
^ith
three
resistances
the
commutating
pole
is
fixed
in
position
given
this
forward
postion.
However,
parallel
operation
that
therefore
divide
according
to
their
resistances.
proper
setting
exactly
equal
to
pole
pitch.
In
this
case
the
position
revolutions.
Since
then,
the
the
temperature
difference,
utoless
the
they
concern
the
general
problem.
However,
as
insulating
materials
in
themselves
are
not
usually
sources
of
heat,
but
as
they
that
in
the
end
windings,
may
cause
a
relatively
large
flow
of
heat
heat will
copper,
the
insulation
turns.
As
the
voltage
at
full
speed
for
over
40
hours,
with
point
at
which
injury
or
destruction
can
be
said
to
take
place.
The
usual
insulating
materials
can
be
the
cooling
medium.
While
most
apparatus
operates
at
materially
lower
cooling
temperature
than
35
deg.
cent,
to
40
deg
cent,,
yet
such
tem-
peratures
are
sometimes
be
fully
understood
that
by
Fig
2
It
must
be
recognized
ventilating
surfaces
etc.
HEAT
principally
by
the
heat
flow
through
the
copper,
parts
of
the
path.
In
any
measuring
device
applied
to
the
outside
or
cooling
surface
does
not,
and
cannot,
directly
approxi-
mate
the
temperature
of
the
hottest
part,
except
in
made
on
these
earlier
machines
to
determine
the
suitability
of
mica
for
field
insulation,
we
carried
one
field
up
to
250
deg.
cent,
for
forty-eight
hours,
and
would
have
continued
foreign
particles,
engineers.
"(ED.)
IN
steel
mill
electrical
work
itself. A
experience
at
materially
higher
temperatures.
Apparently,
such
materials,
when
properly
applied,
essentially
a
separating
and
supporting
material,
rather
than
230C.
Therefore,
temperatures
which,
due
to
all loads.
proportioned
and
adjusted
so
accurately,
to
get
the
right
very
minute,
but
it
appears
still
greater
current.
wear
away
as
rapidly
as
the
copper,
and
the
greater
the
liability
of
the
operators
were
ab-
solutely
quality
lubricant,
and
this
may
set
the
whole
brush
holder
the
top
of
of
comparatively
small
capacity
and
of
low
voltage,
can
stand
such
short-circuit
without
severe
flashing.
generator
which
sparking
and
burning
at
the
brushes
and
commutator.
However,
this
im-
possible
condition
is
overcome
pole
corners
a resultant short-
2 volts or
machine
lessened.
Therefore,
the
speed,
current,
number
of
poles,
etc.,
being
equal,
the
rotary
converter
would
naturally
have
a
materially
lower
value,
with
a
constant
brush,
As
made
shorter
time.
kw
unit,
aH
drawings
were
made
up,
and
or
less
a
number
of
modifications,
each
in
for
transform-
ing
to
direct
figure
also
shows
commutating
or
speed
by
decreasing
the
number
of
poles,
25
cycle.
In
fact,
higher
voltage
machines,
in
which
a
large
machines,
non-use.
Experience
evidenced
by
machines
vary
twenty
-per
between
the
ampere-turns
required
for
two
adjacent
teeth
and
as
slots,
can
be
given
for
the
eddy
current
losses,
it
might
be
advantageous
in
such
air
a
appearance
which
gradually
changed
to
a
blackened
and
under the
component
of
equal
value,
the
rotating
secondary
winding
cuts
this
at
almost
double
the
frequency
of
machine
high
frequency
of
Europe.
Instead
of
25
cycles,
the
Westing-
house
company
expect
to
cover
the
whole.
In
other
words,
two
standards
were
required
to
cover
the
whole
range
the
construction
of
maximum
legislatures
for
the
purpose
of
obtaining
laws
prohibiting
or
limiting
the
use
of
such
voltage.
Another
reason
why
no
higher
voltage
motor
problem.
It
was
in
possible
circulating
currents
of
higher
frequency
than
the
fundamental.
wondered
at
that
considerably
higher
speed
and
the
number
of
poles
in
ried
further
in
turbo-generator
design
than
in
any
IN
FIG.
20
and
a
very
large
k.v.a.,
the
four-pole
cast
steel
construction
was
apparently
approaching
its
limits.
FIG.
28
this
change.
In
the
earlier
turbo-generator
practice,
the
speeds
of
the
General
Electric
Company's
machines
were
relatively
lower
'than
the
PIG.
difficulty,
due
largely
to
the
uniform
rotative
effort
and
sparked
making
up
the
design,
bent
outward
to
the
periphery
of
the
core,
in
an
not
competitive
with
the
not
conductors
per
slot,
the
poles.
It
was
soon
dis-
073
ing
balanced
magnetic
believe
that
mechanical
adjustment
was
a
satisfactory
solution
of
this
difficulty.
In
discussing
the
matter,
This
cross-connection
per
armature
slot
is
as
far
mica
as
an
It was
that some
business,
as
far
as
the
large
the
commutating-
pole
machine,
advantage
in
winding
and
connecting.
In
many
cases,
these
necks
lower
standard,
such
as
40
degrees
rise,
should
be
adopted.
of
cutting
the
temperatures
of
railway
motors
(old
double
reduction
surface-
wound
armatures)
to
about
one-half.
He
M9
time.
Many
developed
only
active
participant
in
this
great
development.
than
fix the
type
of
machine
was
continued
for
several
years
that this was
amperes
when
quite
superior
to
any
preceding
motors
in
its
general
characteristics,
especially
four-pole
machine
with
two
wide
experience
what
However,
as
peculiarly
characteristic
of
the
engineering
profession.
As
the
competent
electrical
working
knowledge
of
the
higher
mathematics.
There
are
certain
lines
of
work