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Sept- 17, 17946.
J. F.1PERFETTI EI‘AL
_
2,407,935
ELECTRICAL MACHINE
Filed Bay 25, 1944
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ATTORNEYS.
Patented Sept. 17, 1946
2,407,935
UNITED STATES PATENT OFFICE
2,407,935
I
ELECTRICAL MACHINE
John F. Perfetti, Dearborn, and Harold E. Wal
dron, Detroit, Mich, assignors to Chrysler Cor
poration, Highland Park, Mich, a corporation
of Delaware
Application May 25, 1944, Serial No. 537,336
1
11 Claims. -(Cl. 171-206)
This application relates to an assembly com
prising laminations and conductors extending
through them and to the method of carrying out
the assembly. More speci?cally, it relates to a
generator stator assembly comprising an annu
lar core formed of laminations and conductors
inserted in the laminations.
It has been known to provide constructions in
volving laminations provided with openings for
2
Fig. 2 is a fragmentary sectional view; and
Fig. 3 is a perspective view showing two con
ductors associated with one another after the
manner or the present invention.
The reference character l0 designates a stator
assembly that includes an annular core I I formed
of a plurality of ?at annular laminations l2 laid
one on the other.
Each lamination I2 is pro
vided, as indicated for the right-hand lamination
conductors and with slots connecting an inner 10 of Fig. l, with a plurality of elongated openings
l3 circularly or arcuately arranged with respect
the openings. The slits perform an important
to one another and with their lengths extending
magnetic or electric function, and they have
radially. The openings l3 are very near an
side or an outer side of the laminations with
served the incidental function of constituting in
inner surface 14 of the core H and are con
lets for the conductors to the openings in the
nected therewith by narrow slits l5. The open
laminations. In other words, the conductors
ings l3 and slits I5 of each lamination l2 are
have been inserted through the slits into the
alined with the openings and slits of the other
slots. This requires that they be of an appre
laminations and constitute with them openings
ciable width, and unless they are at’ least par
and slits extending from one end of the core II
tially ?lled after the conductors are inserted,
to the other end.
the eil‘iciency of the laminations may be too low.
Consider now four of the openings l3, desig
It has been proposed to insert the conductors
nated as Ilia, [3b, l3°, and 13d. They are spaced
endwise through the openings in the laminations,
from one another by six openings. In the open
for this allows the slits to be kept at the desir
ing 13*‘ are positioned two similar but reversely
able minimum width. However, the disadvantage 25 arranged conductors We and lie. Each has a
has been that the ends of ths conductors had to
straight end 18 alined with a straight body por
bend after the assembly with the laminations,
tion i9 and a bent end 20 extending out of aline
and this brought about too great a cost of man
ment with and at a substantial angle to the body
uiacture.
portion l9 and terminating in connecting portion
We propose the use of a new arrangement of 30 2| extending generally in the same direction as
conductors that permits endwise insertion into
the body portion but displaced therefrom by an
the laminations and yet eliminates the costly
amount equal to the spacing between the slots
bending of the ends of the conductors after they
l3‘av and W’ or W1 and 13°. The conductor I6”
are in place in the lamination.
is positioned at the outer end of the slot l3a
An object of the present invention is to pro 35 with its bent end 2i] extending from and across
vide improvements in an assembly involving lam
the near end of the core II and terminating in
inations and conductors extending through the
its connecting portion v2| in general alinement
laminations. These laminations and conductors
with the opening [3b and with its straight end
may constitude a stator assembly for a generator
extending from the far end of the core II. The
of alternating current. However, the use of the 40 conductor lib, on the other hand, is positioned
invention is not to be considered as so limited,
at the inner end of the slot [3a with its bent end
for its principles may be employed to‘ direct
2!! extending from and across the far end of
current machines as well as to alternating-cur
the core ll and terminating in its connection
rent machines, to motors as well as to generators,
portion 2i in general alinement with the open
and to moving parts as well as to stationary 45 ing 13b and with its straight end extending from
parts, whether such parts are associated with
the near end of the core II. In the openings
motors or with generators.
l3", I30, and I3cl there are positioned, respectively,
Another object is to improve'a method of as
conductors I?b and Nb, I6“ and H“, and "id and
sembling structures composed of laminations and
conductors associated therewith.
Other objects will appear from the disclosure.
In the drawing:
Fig. l is a fragmentary perspective view of a
structure employing the principles of the present
invention;
lid, respectively arranged similarly to conductors
I58" and He.
The conductors eachhave an in
sulating‘ coating
2, which separates the con
ductors of a pair positioned in a given opening
from one another electrically. There is a lining
23 of insulating material in each opening. As
55_,seen in Figs. 1 and 3, the connecting portion 2|
a
2,407,935
.1»
on the bent end 20 of the conductor 16a is elec
trically connected to the straight end I9 on the
conductor l'ib through contact of these portions,
they being free of insulation. A ring 24 embraces
the portions and thereby maintains them in con
tact and aids the electrical connection. Simi
larly, the bent end of conductor lib is connected
electrically with the straight end of conductor
is“, and the bent end of conductor 16°, with the
straight end of conductor l'ld. Thus a conduct
ing path is formed of conductors £61‘, lib, I60, [1a.
In a similar fashion a separatae conducting path
4
other end of the stack, a second conductor posi
tioned in a second opening of the stack and hav
ing a straight end protruding from the said other
end of the stack and into proximity with the bent
end of the ?rst conductor and a second bent end
protruding from the said one end of the stack,
and means electrically connecting the bent end
of the ?rst conductor and the straight end of the
second conductor.
2. In combination, a core formed of a stack
of laminations and having a plurality of openings
extending through the stack, a ?rst conductor
positioned in a ?rst opening in the stack and
having a straight end protruding from one end
of the stack and a bent end protruding from the
other end of the stack, a second conductor posi
adjacent conductor parts formed of a straight
tioned in a second opening of the stack and hav
end i9 and a connecting part 2| on a bent end
ing a straight end protruding from the said other
28
be merely juxtaposed without being elec
‘end of the stack and. into proximity with the bent
trically connected if the requirements so dictate.
Even though these parts are not joined, they are 20 end of the first conductor and a second bent end
protruding from the said one end of the stack,
juxtaposed in order to maintain dynamic bal
means electrically connecting the bent end of the
ance.
?rst conductor and the straight end of the second
It will be understood that groups of conductors
conductor, a third conductor positioned in the
are similarly placed in the groups of openings
?rst opening and having a bent end protruding
between the openings I38; I31), 13°, and Kid. For
from the said one end of the stack, and a straight
example, consider the openings immediately to
end protruding from the said other end of he
the right of openings Ma, [3b, 13°, and [3d, the
stack, and a fourth conductor positioned in a
former being designated as l3w, BX, 138', and I3Z.
third opening in the stack on the opposite side of
In each of these openings there may be two con
ductors, onewith a bent end extending from the 30 t. e ?rst opening from the second opening and
having a straight end protruding from the said
far end of the core I l, the other with a bent end
one end of the stack and a bent end protruding
entending from the near end of the core. As in
is formed of conductors Ila, [6b, l‘|°, I6‘1. The
paths may be continued around the core H as
far as is electrically desirable. At certain points.
the case of openings I38‘, l3b, l3“, and l3d, the
conductors will form two conducting paths.
An important feature of the present application
is
one
that
benteach
end.conductor
The straight
has one
endsstraight
enable the
end con~
from the said other end of the stack into proximity
with the straight end of the third conductor, and
'- means electrically connecting the bent end of
the fourth conductor and the straight end of the
third conductor.
’
3. In combination, a core formed of a stack of
ductors to be inserted endwise through the open
laminations and having a plurality of openings
ings on the core, the straight ends ?rst. The bent
end permits easy connection of each conductor 40 extending through the stack, a ?rst conductor
positioned in a ?rst opening in the stack and hav
with the straight end of another conductor. Since
ing a straight end protruding from one end of the
only one end of each conductor is bent, there
stack and a bent end protruding from the other
need be no shaping of the conductors after they
end of the stack, a second conductor positioned
have been positioned in the openings in the core.
in a second opening of the stack and having a
This brings about a considerable saving in cost.
straight end protruding from the said other end
Since the conductors are not inserted through the
of the stack and into proximity with the bent end
slots l5, they may be kept at the minimum width
of the ?rst conductor and a second bent end pro
requisite for high electrical ef?ciency,
truding from the said one end of the stack, means
The assembly of the conductors in the lamina—
tions may be carried out in the following manner. 50 electrically connecting the bent end of the ?rst
conductor and the straight end of the second
All, the conductors having bent ends to be located
conductor, a third conductor positioned in the
atone end of the core may be inserted. There
?rst opening and having a bent end protruding
after the conductors having bent ends to be lo
from the said one end of the stack and a straight
cated at the other end of the core may be inserted.
Then the ring connectors 24 are applied to the 55 end protruding from the said other end of the
stack, and a fourth conductor positioned in the
ends of the rings. Alternatively the two con
second opening and having a bent end protruding
ductors for a certain opening may be inserted
from the said other end of the stack and a straight
before the two conductors for another opening.
end protruding from the said one end of the
Theassembly comprising the conductors and
the core II as shown is adapted for use as the 60 stack into proximity with the bent end of the third
conductor, and means electrically connecting the
stator assembly of an alternating-current gener
bent end of the fourth conductor and the straight
ator. The principles of the invention may be ap
end of the third conductor.
plied to direct-current machines as well as to
a. In combination, a core formed of a stack
alternating-current machines, to motors as well
to
astogenerators,
stationary parts.
and to moving parts as well
65 of laminations and having ?rst, second, third, and
fourth openings arranged in numerical order, a
?rst conductor positioned in the ?rst slot and
having a straight end protruding from one end
of the stack and a bent end extending from the
1. In. combination, a core formed of a stack of 7O other end of the stack to'a region in general aline
ment with the second hole, a second conductor
laminations and having a plurality of openings
positioned in the second slot andhaving a straight
extending through the stack, a ?rst conductor
end extending from the said other end of the
positioned in. a ?rst opening in the stack and
stack into proximity with the bent end of the ?rst
having a straight end protruding from one end
of the stack and a bent end protruding from the 75 conductor and a bent end extending from thersaidv
The intention is to limit the invention only
within. the scope of the appended claims.
We claim:
5
2,407,935
6
one end of the stack to a region in general aline
opening of the second group, a fourth set of con
ment with‘the third opening, means electrically
ductors positioned in the second group of open
connecting the bent end of the ?rst conductor
ings, one conductor to an opening, each conduc
and the straight end of the second conductor,
tor having a straight end extending from the
a third conductor positioned in the third slot and 5 said one end of the stack and a bent end extend
having a straight end extending from the said
ing from the said other end of the stack in the
one end of the stack into proximity with the bent
said certain direction into general proximity with
end of the second conductor and a bent end
the straight end of a conductor of the’ third set,
extending from the said other end of the con
and means electrically connecting at least some
ductor to a region in general alinement with the 10 of the adjacent pairs of bent and straight ends
fourth opening, means electrically connecting the
of the conductors.
bent end of the second conductor and the straight
6. A stator assembly for an alternating-cur
end of the third conductor, a fourth conductor
rent generator, comprising a core formed of a
positioned in the fourth slot and having a straight
stack of laminations and having a plurality of
end extending from the said other end of the 15 openings extending through the stack, a ?rst set
stack into proximity with the bent end of the
of conductors positioned in the openingspone
third conductor and a bent end extending from
conductor to an opening, nd having straight
the said one end of the stack, a ?fth conductor
ends protruding from one end of the stack and
positioned in- the ?rst opening and having a
bent ends protruding from the other end of the
straight end protruding from the said other end 20 stack, each bent end extending in the samedi
of the stack and a bent end extending from the
rection as the other bent ends of the conductors
said one end of the stack to a region of general
of the ?rst group out of alinement With the
alinement with the second opening, a sixth con
opening containing the conductor having the par
ductor positioned in the second opening and
ticular» bent end to aregion of general alinement
having a straight end extending from the said
with the opening containing an adjacent con
one end of the stack into proximity with the bent
ductor of the ?rst set, a second set of conductors
end of ?fth conductor and a bent end extending
positioned in the openings, one conductor to an
from the said other end of the stack to a region
opening, and having straight ends protruding
of general alinement with the third opening,
from the said other end of the stack and bent
means electrically connecting the bent end of the 30 ends protruding from the said one end of the
?fth conductor and the straight end of the sixth
stack, each bent end extending in the same di~
conductor, a seventh conductor positioned in the
rection as the other bent ends of the conductors
third opening and having a straight end extend?
of the second set out of alinement with the open
ing from the said other end of the stack into prox
ing containing the conductor having the partic
imity with the bent end of the sixth conductor,
ular bent end into adjacency with the straight
means electrically connecting the bent end of
end of an adjacent conductor of the '?rst set
the sixth conductor and the straight end of the
and a straight end extending into proximity with
seventh conductor, an eighth conductor positioned
the bent end of an adjacent conductor of the ?rst
in the fourth slot and having a straight end ex
set, and means electrically connecting at least
tending from the said one end of the stack into 40 some of the pairs of the proximate bent and
proximity with the bent end of the seventh con~
straight ends of the conductors.
, _
ductor and a bent end extending from the said
7. A method of applying conductors to open
other end of the stack, and means electrically
- ings in a core composed of a stack of laminations
connecting the bent end of the seventh conductor
to form a generator stator assembly, comprising
and the straight end of the eighth conductor.
in Ul providing a plurality of-conductors, each having
5. In combination, an annular core formed of
a straight end extending in alinement with a
a stack of laminations and having a plurality of
main body portion and a bent end extending out
openings extending through the stack adjacent
of alinement with the main body portion, in
the inner side thereof and narrow slits connect
serting the straight ends of a ?rst set of the con
ing the openings and the inner side of the stack, C21 0 ductors in the openings in the stack at one end
a ?rst set of conductors positioned in a certain
thereof and moving the?rst set of the conduc
alternate group of openings, one conductor to
tors endwise through the openings so as to cause
an opening, each conductor having a straight
the body portion of each of the ?rst set of the
end extending from one end of the stack and a
conductors to occupy an opening and the straight
bent end extending from the other end of the,
end and the bent end to extend, respectively,
stack in a certain direction out of alinement with
from
the other end of the stack in alinement
its opening to a region of general alinement with
with the opening and from the said one end of
another opening in the stack, the said other
the stack out of alinement with the opening to
opening and similar openings constituting a sec
a region of general alinement with an adjacent
ond alternate group of openings interspaced With
opening, inserting the straight ends of a second
the ?rst group of openings, a second set of con
set of the conductors at the said other end of
ductors positioned in the second group of open
the stack in the openings occupied by the ?rst
ings, one conductor to an opening, each conduc
.set of the conductors and moving the second set
tor having a straight end extending from the
endwise through the openings to cause the body
said other end of the stack into proximity With
portion of each conductor of the second set to
the bent end of a conductor of the ?rst set and
occupy an opening and the straight end and the
a bent end extending from the other end of the
bent end to extend, respectively, from the said
stack in the said certain direction into proximity
one end of the stack in alinement with the open
with the straight end of a conductor of the ?rst
ing into adjacency With a bent end of a conduc
set, a third set of conductors positioned in the
tor of the ?rst set, and from the saidother end
?rst group of openings, one conductor to an open
of the stack out of alinement with the opening
ing, each conductor having a straight end ex
into adjacency With a bent end of a conductor
tending from the said other end of the stack and
of the ?rst set, and electrically connecting at
a bent end extending from the one end of the
least some of the pairs of the adjacent straight
stack to a region of general alinement with an 75 and bent ends of the conductors.
2,407,935
7
8. A method of applying conductors to openings
in a. core composed of a stack of laminations to
form a generator stator assembly, comprising
providing a plurality of conductors, each having
a straight end extending in alinement with a
main body portion and a bent end extending out
of alinement with the main body portion, insert
ing the straight end of a ?rst conductor in a ?rst
opening in the stack at one end thereof and mov
8
particular bent end into adjacency with the
straight end of an adjacent conductor of the
?rst set and a straight end extending into prox
imity with the bent end of an adjacent conductor
of the ?rst set, and means electrically connecting
at least some of the pairs of the proximate bent
and straight ends of the conductors.
10. In combination, a core formed of a stack
of laminations and having a plurality of elongat
ing the ?rst conductor endwise through the ?rst 10 ed openings arcuately arranged with the length of
the openings extending radially and narrow slits
opening so as to cause the body portion to occupy
at one end of the openings, a ?rst set of conduc
the ?rst opening and the straight end and the
tors positioned in the openings one to an opening
bent end to extend, respectively, from the other
and at the radially inner end of the slot and
end of the stack in alinement with the ?rst open
having straight ends protruding from one end of
ing and from the said one end of the stack out
the stack and bent ends protruding from the other
of alinement with the ?rst opening to a region of
end of the stack, each bent end extending in the
general alinement with a second opening, insert
same direction as the other bent ends of the con
ing the straight end of a second conductor in
ductors of the ?rst group out of alinement with
the ?rst opening at the said other end of: the
the opening containing the conductor having the
stack and moving the second conductor endwise
particular bent end to a region of general aline~
through the ?rst opening so as to cause the body
ment with the opening containing an adjacent
portion thereof to occupy the ?rst opening and
conductor of the ?rst set, asecond set of conductors
the straight end and the bent end to extend,
positioned in the openings one to an opening and
respectively, from the said one end of the stack
at the other end of the slot and having straight
in alinement with the ?rst opening and from the
ends protruding from the said other end of the
said other end of the stack out of alinement with
stack and bent ends protruding from the said one
the ?rst opening to a region of general alinement
end of the stack, each bent end extending in the
with the second opening, inserting the straight
end of a third conductor in the second opening
at the said one end of the stack and moving the
third conductor endwise through the second open
ing so as to cause the body portion to occupy
same direction as the other bent ends of the con
ductors of the second set out of alinement with
the opening containing the conductor having the
particular bent end into adjacency with the
straight end of an adjacent conductor of the ?rst
the second opening and the straight end and the
set and a straight end extending into proximity
bent end to extend, respectively, from the said
with the bent end of an adjacent conductor of
other end of the stack into adjacency with the
the ?rst set, and means electrically connecting
bent end of the second conductor and from the
at least some of the pairs of the proximate bent
said one end of the stack out of alinement with
and straight ends of the conductors.
the second opening to a region of general aline
11. In combination, an annular core formed of
ment with a third opening, inserting the straight
end of a fourth conductor in the second opening 40 a stack of annular laminations and having a plu
rality of elongated openings extending through
at the said other end of the stack and moving
the stack and being arcuately arranged with the
the fourth conductor endwise through the sec
lengths of the openings extending radially’ and
ond opening so as to cause the body portion to
narrow slits connecting the radially inner end of
occupy the second opening and the straight end
the openings and the inner side of the stack,
and the bent end to extend, respectively, from
a ?rst set of conductors positioned in the open
the said one end of the stack into adjacency with
ings one to an opening and at the radially inner
the bent end of the ?rst conductor and from the
end of the slot and having straight ends pro
said other end of the stack out of alinement
truding from one end of the stack and bent ends
with the second opening to a region of general
protruding from the other end of the stack, each
alinement with the third opening, and electrically I
bent end extending in the same direction as the
connecting at least some of the pairs of adjacent
other bent ends of the conductors of the ?rst
bent and straight ends of the conductor.
group out of alinement with the opening contain
9. In combination, a core formed of a stack
ing the conductor having the particular bent end
of laminations and having a plurality of open
to a region of general alinement with the opening
ings extending through the stack, a ?rst set of
containing an adjacent conductor of the ?rst set,
conductors positioned in the openings one to an
a second set of conductors positioned in the open
opening and at one end of the slot and having
ings one to an opening and at the radially outer
straight ends protruding from one end of the
end of the slot and having straight ends pro
stack and bent ends protruding from the other
truding from the said other end of the stack and
end of the stack, each bent end extending in the \
bent ends protruding from the, said one end of
same direction as the other bent ends of the con
the stack, each bent end extending in the same
ductors of the ?rst set out of alinement with the
direction as the other bent ends of the conductors
opening containing the conductor having the par
of the second set out of alinement with the open
ticular bent end to a region of general alinernent
ing containing the conductor having the particu
with the opening containing an adjacent con
lar bent end into adjacency with the straight end
ductor of the ?rst set, a second set of conductors
of an adjacent conductor of the ?rstset and a
positioned in ‘the openings one to an opening and
straight end extending into proximity with the
at the other end of the slot and having straight
ent end of an adjacent conductor of the ?rst
ends protruding from the said other end of the
stack and bent ends protruding from the said
set, and means electrically connecting at least
some of the pairs of the proximate bent and
one end of the stack, each bent end extending in
straight ends of the conductors.
the same direction as the other bent ends of the
JOHN F. PERFET'I'I.
conductors of the second set out of alinement with
HAROLD E. WALDRON.
the opening containing the conductor having the
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