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1. WO2020142796 - METHOD OF COOLING A SHELL-TYPE TRANSFORMER OR INDUCTOR

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]AMENDEDinitial

AMENDED CLAIMS

received by the International Bureau on 20 June 2020 (20.06.2020)

Claims:

1 ) A Method of reducing the temperature rise of a shell-type transformer or inductor during normal use, via slits or similar of any convenient size, without reducing the ferromagnetic flux pathway due to the slits, the method including; organizing a shell-type transformer or inductor to have a ferromagnetic core (fig 2, 200.1 ), said core organized to have one or more electromagnetic coils (fig 2, 200.2) encircling a centre limb (fig 2, 200.1 .1 ) of said core, said core further organized to have any number of slits (fig 2, 200.3; fig 3, 300.3) or similar inside the side limbs (fig 2, 200.1 .2, 200.1.3) of said core.

2) The ferromagnetic core of a shell-type transformer or inductor, said core (fig 2, 200.1 ) organized to have a centre limb (fig 2, 200.1 .1 ) and two side limbs (fig 2, 200.1 .2, 200.1 .3), said core further organized to have any number of slits (fig 2, 200.3; fig 3, 300.3) or similar of any convenient size inside the side limbs of said core, said slits organized to allow air or oil or similar to circulate through said core.

3) A five-limb three-phase transformer, said transformer organized as a shell-type transformer, said transformer organized to have a ferromagnetic core, said core organized to have primary coils and secondary coils encircling the three centre limbs of said core, said core further organized to have any number of slits inside the side limbs of said core.

4) The ferromagnetic core of a shell-type transformer or inductor, said core organized to have a centre limb and two side limbs, said core further organized to have any number of slits (fig 3, 300.3) or similar of any convenient size inside the side limbs of said core, said core

constructed from laminated E (fig 3, 300.1 .1 ) and I (fig 3, 300.1 .2) type of laminations, said slits organized to increase the surface area of said core.

5) A transformer with magnetic shunts (fig 5, 500.4.1 , 500.4.2) organized in accordance with claim 1 or claim 2 or claim 4 inclusive.

6) A bank of transformer, constructed from three single-phase transformers, organized to function as a thee-phase transformer, where each of said single-phase transformers is organized in accordance with claim 1 or claim 2 or claim 4, inclusive.

7) A three-phase transformer organized to have magnetic shunts, said transformer further organized in accordance with claim 1 or claim 2 or claim 4 or claim 5 or claim 6, inclusive.

8) The ferromagnetic core of a shell-type transformer or inductor organized to have a symmetrical path-length, as viewed from the position where the electromagnetic coils may be organized to encircle the core, said core further organized in accordance with claim 1 or claim 2 or claim 4 or claim 5, inclusive.

9) The ferromagnetic core of a transformer or inductor organized to increase the average ferromagnetic path-length, further organized in accordance with claim 1 or claim 2 or claim 4 or claim 5 inclusive.

10) A transformer organized to operate at a frequency of approximately 400 Hz, during normal use, organized in accordance with claim 1 or claim 2 or claim 4 or claim 5 inclusive.

1 1 ) A transformer used on an aircraft organized in accordance with claim 1 or claim 2 or claim 4 or claim 5 or claim 10, inclusive.

12) A transformer used to energise the magnetron of a microwave oven, organized in accordance with claim 1 or claim 2 or claim 4 or claim 5, inclusive.

13) Any intermediate component or sub-component of the core of a transformer or inductor organized in accordance with claim 1 or claim 2 or claim 3 or claim 4 or claim 5, inclusive.

14) A Shell-type transformer organized to have one or more slits in the ferromagnetic core of said transformer, without reducing the ferromagnetic flux pathway due to the slits or reducing the resulting power rating of said transformer due to the slits, organized in accordance with claim 1 .

15) A Shell-type transformer organized to have one or more slits in the ferromagnetic core of said transformer, without obstructing air or oil or similar flow through said slits due to one or more electromagnetic coils, organized in accordance with claim 1 or claim 2 or claim 3 or claim 4 or claim 5 or claim 6 or claim 7, inclusive.