US3593243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical induction apparatus
Assignee: High Voltage Power Corp
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Filing: 1969-06-02
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Granted: 1971-07-13
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Expires: 1989-06-02
Abstract
Abstract An electrical induction apparatus, adaptable for use as a transformer or a reactor which contains a magnetic circuit and an electrical circuit. The active portions of the magnetic circuit are formed of electrically isolated segments, each segment being electrically connected to a distinct portion of the electrical circuit such that when a voltage is impressed on the electrical circuit a systematic and uniform progression of voltage is imposed on the magnetic circuit. The electrical isolation appearing between each segment of the magnetic circuit is coated with a material adapted to establish electric field boundaries between the segments and prevent the creation of high electrical stress points while also preventing excessive eddy current loses.
Inventors
- 👤 John George Trump
- 👤 Brian Skillicorn
- 👤 Bryon Lee Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:12
CPC Classifications
H; H01; H01F; H01F30/00; H01F30/06; H01F30/12; H01F27/00; H01F27/28; H01F27/32; H01F27/324; H01F27/33; H01F27/34; H01F27/343; H01F27/346; H01F30/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
292 words
An electrical induction apparatus for connection to a highvoltage AC power system comprising a plurality of magnetic legs, each of said legs having a first and a second end, a magnetic return interconnecting at least one end of said legs, at least one of said plurality of legs being encompassed by at least one coil means for connecting at least one coil between a highvoltage AC power system and ground, means for placing a portion of each leg at a potential related to the potential of the highvoltage AC power system, means for maintaining at least one of said returns at ground potential, at least one of said legs being comprised of a plurality of magnetic segments electrically insulated from each other by insulation means, each of said magnetic segments being electrically coupled to the interior winding of a respective coil to distribute any voltage developed across said winding, a portion of said insulation means being subjected to both a resultant electric field and active magnetic field that may be created in said apparatus, first voltage surge distribution means positioned on those portions of the insulation means abutting magnetic segments and electrically coupled to respective magnetic segments, second voltage surge distribution means positioned within said insulation means in a plane parallel to said insulation means and extending throughout said second voltage surge distribution being electrically coupled to the exterior winding of the immediate coils on either side of said insulation means, voltage surge distribution means cooperating with said insulation means to create a dual series capacitance between any two magnetic segments and said first and second voltage surge distribution means having low eddy current losses and distributing any created electrostatic potential uniformly across said insulation means with controlled reduction of electric stress.
Claim 2
Dependent Claim
292 words
An electrical induction apparatus for connection to a highvoltage AC power system comprising a plurality of magnetic legs, each of said legs having a first and a second end, a magnetic return interconnecting at least one end of said legs, at least one of said plurality of legs being encompassed by at least one coil means for connecting at least one coil between a highvoltage AC power system and ground, means for placing a portion of each leg at a potential related to the potential of the highvoltage AC power system, means for maintaining at least one of said returns at ground potential, at least one of said legs being comprised of a plurality of magnetic segments electrically insulated from each other by insulation means, each of said magnetic segments being electrically coupled to the interior winding of a respective coil to distribute any voltage developed across said winding, a portion of said insulation means being subjected to both a resultant electric field and active magnetic field that may be created in said apparatus, first voltage surge distribution means positioned on those portions of the insulation means abutting magnetic segments and electrically coupled to respective magnetic segments, second voltage surge distribution means positioned within said insulation means in a plane parallel to said insulation means and extending throughout said second voltage surge distribution being electrically coupled to the exterior winding of the immediate coils on either side of said insulation means, voltage surge distribution means cooperating with said insulation means to create a dual series capacitance between any two magnetic segments and said first and second voltage surge distribution means having low eddy current losses and distributing any created electrostatic potential uniformly across said insulation means with controlled reduction of electric stress.
Claim 3
Dependent Claim
45 words
The apparatus of claim 1 wherein each magnetic segment is surrounded by at least one set of parallel connected coils and wherein each of said sets is connected in series, said coil sets being electrically connected at their interior winding to the respective magnetic segment.
Claim 4
Dependent Claim
19 words
The apparatus of claim 2 wherein said insulation means comprises sheet material and bar spacers having open spaces therebetween.
Claim 5
Dependent Claim
17 words
The apparatus of claim 1 wherein said insulation means comprises insulators adapted to conform to said segments.
Claim 6
Dependent Claim
20 words
The apparatus of claim 1 wherein said insulation means has electrically lengthened edges to increase the flashover, surface creepage strength.
Claim 7
Dependent Claim
14 words
The apparatus of claim 1 wherein the voltage surge distribution means comprises semiconducting layers.
Claim 8
Dependent Claim
29 words
The apparatus of claim 1 wherein said magnetic segments are chamfered to approximate a Roqowski profile such that intensification of magnetic gradients at the edges thereof is substantially avoided.
Claim 9
Dependent Claim
38 words
The apparatus of claim 1 wherein there is provided on one of said legs two windings one of said windings having an emf induced therein when the other of said windings is coupled to said high-voltage AC system.
Claim 10
Dependent Claim
28 words
The apparatus of claim 1 wherein a portion of said winding is connected between one line of the power consuming portion of the AC power system and ground.
Claim 11
Dependent Claim
22 words
The apparatus of claim 1 wherein each of said magnetic returns extends at least to cover the planar area of said coils.
Claim 12
Dependent Claim
35 words
The apparatus of claim 1 wherein there is further provided means for electrically insulating said coils independently of the means isolating said segments to provide lateral freedom of movement between said segments and said coils.
Claim 13
Dependent Claim
22 words
The apparatus of claim 1 wherein said coils are supported by insulating means physically independent of the insulating means supporting said segments.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |