High voltage transformer

• US 10,373,755 B2
• Filed: 11/30/2016
• Issued: 08/06/2019
• Est. Priority Date: 11/30/2015
• Status: Active Grant

• Current Assignee: EHT Ventures LLC
• Original Assignee: Eagle Harbor Technolologies, Inc.
• Inventors: Prager, James R., Ziemba, Timothy M., Miller, Kenneth E., Carscadden, John G., Slobodov, Ilia
• Primary Examiner(s): Hinson, Ronald
• Application Number:
  US15/365,094
• Publication Number:
  US 20170154726A1
• Time in Patent Office: 979 Days
• Field of Search: 336229
• CPC Class Codes: H01F 2027/2814 with only part of the coil or of the winding in the printed circuit board, e.g. the remaining coil or winding sections can be made of wires or sheets
• CPC Class Codes: H01F 27/24 Magnetic cores
• CPC Class Codes: H01F 27/2804 Printed windings
• CPC Class Codes: H01F 27/2866 Combination of wires and sheets
• CPC Class Codes: H01F 27/2895 Windings disposed upon ring cores
• CPC Class Codes: H01F 30/16 Toroidal transformers

Abstract

A high-voltage transformer is disclosed. The high-voltage transformer includes a transformer core; at least one primary winding wound once or less than once around the transformer core; a secondary winding wound around the transformer core a plurality of times; an input electrically coupled with the primary windings; and an output electrically coupled with the secondary windings that provides a voltage greater than 1,1200 volts. In some embodiments, the high-voltage transformer has a stray inductance of less than 30 nH as measured on the primary side and the transformer has a stray capacitance of less than 100 pF as measured on the secondary side.

Claims

1. A high-voltage transformer comprising:

a transformer core;

at least one primary winding wound at least partially around the transformer core;

a secondary winding wound around the transformer core a plurality of times;

an input electrically coupled with the primary windings; and

an output electrically coupled with the secondary windings that provides a voltage greater than 1200 volts,

wherein the transformer has at least one dimension selected from the group consisting of a radius, a width, a height, an inner radius, and an outer radius that is greater than 3 cm;

wherein the high-voltage transformer has a stray inductance of less than 30 nH as measured on the primary side and the transformer has a stray capacitance of less than 100 pF as measured on the secondary side, wherein the primary side includes the at least one primary winding, and the secondary side includes the at least one secondary winding.

2. The high-voltage transformer according to claim 1, wherein the primary winding comprises a wire and a trace on a circuit board.

3. The high-voltage transformer according to claim 1, wherein the at least one primary winding comprises a plurality of conductors wound less than one time around the transformer core.

4. The high-voltage transformer according to claim 1, wherein the at least one secondary winding comprises a single conductor wound around the transformer core a plurality of times.

5. The high-voltage transformer according to claim 1, wherein the transformer core has a toroid shape.

6. The high-voltage transformer according to claim 1, wherein the transformer core has a cylinder shape.

7. The high-voltage transformer according to claim 1, wherein the secondary winding comprises at least a first group of windings wound around the transformer core at a first location and a second group of windings wound around the transformer core at a second location that is separate from the first location.

8. The high-voltage transformer according to claim 1, wherein each of at least a subset of the secondary windings are spaced further apart from the transformer core than one of a neighboring winding of the subset of the secondary windings.

9. The high-voltage transformer according to claim 1, wherein each of a first subset of the secondary windings are spaced further apart from a second subset of the secondary windings.

10. A high-voltage transformer comprising:

a transformer core;

at least one primary winding wound once or less than once around the transformer core;

a secondary winding wound around the transformer core a plurality of times;

an input electrically coupled with the primary windings; and

an output electrically coupled with the secondary windings that provides a voltage greater than 1200 volts;

wherein the high-voltage transformer has a stray inductance of less than 30 nH as measured on the primary side and the transformer has a stray capacitance of less than 100 pF as measured on the secondary side, wherein the primary side includes the at least one primary winding, and the secondary side includes the at least one secondary winding.

11. The high-voltage transformer according to claim 10 wherein the primary winding comprises a wire and a trace on a circuit board.

12. A high-voltage transformer comprising:

a first transformer core;

a first primary winding wound at least partially around the first transformer core;

a second transformer core;

a second primary winding wound at least partially around the second transformer core;

a secondary winding wound a plurality of times around both the first transformer core and the second transformer core;

an input electrically coupled with the primary windings; and

an output electrically coupled with the secondary windings that provides a voltage greater than 1200 volts;

wherein the high-voltage transformer has a stray inductance of less than 30 nH as measured on the primary side and the transformer has a stray capacitance of less than 100 pF as measured on the secondary side, wherein the primary side includes the at least one primary winding, and the secondary side includes the at least one secondary winding.

13. The high-voltage transformer according to claim 12, wherein the first primary winding comprises a wire and a trace on a circuit board, and wherein the second primary winding comprises a wire and a trace on a circuit board.

14. The high-voltage transformer according to claim 12, further comprising:

one or more additional transformer cores; and

one or more additional primary windings, each of the one or more additional primary windings wound once or less than once around the a respective one of the one or more additional transformer cores;

wherein the secondary winding is wound around the first transformer core, the second transformer core, and the one or more additional transformer cores a plurality of times.

15. A high-voltage transformer comprising:

a transformer core having a cylinder shape;

an insulator disposed on surfaces of the transformer core;

a conductor sheet disposed on the insulator and disposed around a portion of the transformer core;

a secondary winding comprising a wire wound around the conductor sheet and the transformer core a plurality of times;

an input electrically coupled with the conductor sheet; and

an output electrically coupled with the secondary windings that provides a voltage greater than 1200 volts

wherein the high-voltage transformer has a stray inductance of less than 30 nH as measured on the primary side and the transformer has a stray capacitance of less than 100 pF as measured on the secondary side, wherein the primary side includes the at least one primary winding, and the secondary side includes the at least one secondary winding.