WIRE-CORE TRANSFORMER

TRANSFORMATEUR A NOYAU DE FIL

English Abstract

ABSTRACT OF DISCLOSURE
A variation of the toroidal transformer, utilized in processes
requiring a switching power supply. A static device comprising
multiple coupled windings, with a magnetic core comprised of WIRE,
used for introducing mutual couplings between circuits (standard
IEEE definition). The improvement is the wire core, comprising a
plurality of turns, in combination, on one plane, of magnetically
conducting, low-grade or other, wire. Primary and secondary
windings encircle the core structure, through its open centre,
following the conventional processes of transformer manufacture.
Insulating material is applied accordingly.

Claims

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE PROPERTY
OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:


1. A transformer possessing multiple coupled windings, with a
magnetic core, used for introducing mutual couplings between
circuits, wherein the improvement comprises
a wire core.
2. A transformer as defined in claim 1, in which a wire core is
comprised of iron wire with magnetic properties.
3. A transformer as defined in claim 1, in which a wire core is
comprised of multiple windings of magnetic wire of a toroidal or
doughnut-shaped structure, having portions defining a hole at or
about its centre.
4. A transformer as defined in claim 3, in which the multiple
magnetic wire cores are in a common plane.
5. A transformer as defined in claim 1, in which the magnetic
wire core acts as a magnetic coupler between primary and
secondary electrical windings.
6. A transformer as defined in claim 1, in which the magnetic
wire core is encircled by conventional primary and secondary
electrical windings,
7. A transformer as defined in claim 1, in which the magnetic
wire core is fixed and insulated accordingly.
8. A transformer as defined in claim 1, whose magnetic wire
core is comprised of a plurality of turns of magnetic iron wire,
in combination, conforming to a toroidal or doughnut shape,
having portions defining a hole at or about its centre.

Description

DISCLOSURE
, 3 0 ~ 1 4 9
rrhe present invention relates to a transformer device
r~sponsible for increasiny or decreasing the voltage of an
alternating current.



Many transformers are currently in existence. E-type, (5)
I-type, and C-type are common, but lack in efficiency.
A toroidal transformer possesses a gapless core, and is
more e~ficient. The matter Q~ the core may vary; iron,
nickel, and other powdered or laminated materials may be
utilized~ Toroid transformers are more in demand because (10)
of their efficiency.



A common type o~ toroid transformer has, as its core,
a strip of electrical sheet steel superimposed on a narrower
strip o~ el~ctrically conducting material An example f (15)
such a core is described and illustrated in Canadian
Patent No. 595, 575, dated Aprll 5, 1960, granted to Teague
and McWhirter, assignors of Westinghouse Electric Corporation
for a "Trans~ormer Core Structure." Devices possessing such
cores have the disadvantage of being overly expensive to (20
manufacture. A more intricate method of manufacture is
required fQr improved per~ormance at a lower cost,
re~uiring more time, effort and skilled la~our.




", ~

(Cont~d...p,l) 1 3091 49
It is desirable to have a transformer that is both in-
expensive and easy to manufacture, while maintaining the same
level of p~rformance when compared to existing transformers. The
present invention relates to a transformer, but possesses an
improved core structure, comprised of wire, and may be (5)
manu~actured more easily, and at a significantly lower cost.
Its uses or applications are iden~ical to those defined for
existing transformers.



The present invention is a transformer device whose (10)
magnetic core is comprised of magnetically conducting wire~
A multiplicity of turns of sai~ wire are wound together, in
combination, on one common plane, to ~o~m a toroidal core
structure. The number of w~re win~ings or turns are propor-
tional to tne xe~uired power change or output. The thickness (15)
o~ the core is proportional to the number of wire windings.



In constructing the trans~ormer, the core structure is
the first step. Herein lies the improvement, as previously
stated. In order to Porm the toroid, or doughnut~shaped (20)
core, a plurality of turns o~ magnetically conducting WIRE
may be wound, in combination, on one common plane. The aentre
o~ the core possesses qualities defining a hole. The number o~
wire turns are proportional to power requirements. The wire
core possesses a magnetic charact~r, and acts as a magnetic ~25)


;~ - 2 -


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.,,~ ~, . . . -
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1 309 1 ~9
(Cont'd...p.2~
coupler between primary and secondary windings, as is
standard in trans~ormer construction. Depending on the
power source, the frequency of the transformer may range
from 50 Hz to 150 k~Iz. The core may be secured and
insulated accordingly. t5)

A primary winding (S1 turns) and a secondary
winding (S2 turns~ encircle the wire core passing
through the open centre of the core. The primary and
secondary windings are usually comprised o~ multiple (lQ)
turns of enamelled copper magnet wire. The number of turns
relate to the magnetic core, following standard theory behind
the transformer. 'rhe primary winding is the windin~ to which
power is supplied, and the secondary winding is the winding
wherefrom power is received. The wire leads stem ~rom (15)
either primary or secondary windings.

The magnetic wire aore, the primary winding and the
secondary winding, may be subsequently insulated with
matexials such as the trade-m~rked product FIBREGL~S(20)
(tape) and epoxy; othar like subætances may be applied
accordingly.

The invention, as exemplified by a preferred embodiment,
~ is described with reference to the drawings in which: ~2S)




,:

~Cont~d...p~3) 1 3091 4q
Fig. 1. is a perspective and cross-sectional view
of the transformer, exhibiting: (1) the wire core,
~2) the primary winding, (3) the secondary winding,
and (43 the insulation,
(5)
Fig. ~. is a view o~ tl) the primary winding and
(2) o~ the insulated wire core;



and
(10)
Fig. 3. is a view of the insulated wire core~



Re~errinq to the drawings, the embodiment, in Fig. 1.,
represents a trans$ormer with a wire core (10). (a)
comprises the wire core; (b) comprises insulating and/or (15)
~ixi~g material(s): (c) comprises the primary winding;
(d) aomprise~ insulating and~o.r ~ixing material(s); (e)
comprlse6 the ~condary win~ing: (~) aomprlses insulating
and~or ~ixing material(s); ~g) comprises w.ire leAds
stemming ~rom the primary and secondary windings. (~0)



Figures 2 and 3 ~urther illustrate the structure. In
Fig. 2., (a) comprises the wire cora: (b) comprises
insulating and~or ~ixing matexial(s): (c) comprises several
windings of the primary winding. (25)

`: :
`'

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.. : ,

,

1 309 1 ~9
(Cont'd...p.4)
In Fig. 3., (a) comprises the wire core, being a
plurality of wire windings, in combination, on one common
plane; (b) comprises insulating and/or fixi~g material(s).



In summary, the invent.ion is a static davice, (5)
comprising mulkiple coupled windings, used for introducing
mutual couplings between circuits, and possessing an
improved magnetic core comprised of magnetically conducting
WIR~. The modified core comprised nf wire is ef~icien~ in
that it greatly simpli~ies the manufacturing proc~ss, (10)
greatly reduces costs of production, and saves on time
without compromising quality. It has multiple uses in
today's expanding electronic/electric market.



The invention is a new varia~ion of the transformer t15)
because it possesses a wire core, instead of a core
cQmprised o~ flat sheets or strips o~ silicon iron, or
other alloys, or ~reated combinations of matter requiring
more time, effort and increased costs o~ production. This
inexpensive trans~ormer will ~e competitive in today's (20)
industryl and will assist in enhancing Canadian Small
~usiness ventures by allowing them to compete with larger
corporations.




5 ~

:

Representative Drawing