CA1309149C

CA1309149C - Wire-core transformer

Info

Publication number: CA1309149C
Application number: CA 610114
Authority: CA
Inventors: James Zisimatos
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-09-01
Filing date: 1989-09-01
Publication date: 1992-10-20

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.

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 -B
.,,~ ~, . . . -:` :

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) `: :
`' :' .. : , , 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 ~

:

Claims

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.