High voltage inductive adder

• US 10,268,846 B2
• Filed: 12/29/2017
• Issued: 04/23/2019
• Est. Priority Date: 12/30/2016
• Status: Active Grant

• Current Assignee: EHT Ventures LLC
• Original Assignee: Eagle Harbor Technolologies, Inc.
• Inventors: Miller, Kenneth E., Prager, James R., Ziemba, Timothy M., Carscadden, John G., Bowman, Christopher Matthew, Slobodov, Ilia
• Primary Examiner(s): Cole, Brandon S
• Application Number:
  US15/859,163
• Publication Number:
  US 20180189524A1
• Time in Patent Office: 480 Days
• Field of Search: 336 92-234
• CPC Class Codes: G06G 7/02 Details not covered by G06G7/04 - G06G7/10, e.g. monitoring, construction, maintenance
• CPC Class Codes: G06G 7/14 for addition or subtraction of vector quantities G06G7/22 ; computing the average by addition; differential amplifiers H03F3/45
• CPC Class Codes: H01F 27/2823 Wires H01F27/2866 takes precedence
• CPC Class Codes: H01F 27/2895 Windings disposed upon ring cores
• CPC Class Codes: H01F 30/06 characterised by the structure
• CPC Class Codes: H01F 30/16 Toroidal transformers
• CPC Class Codes: H03K 3/53 by the use of an energy-accumulating element discharged through the load by a switching device controlled by an external signal and not incorporating positive feedback H03K3/335 takes precedence

Abstract

A high voltage inductive adder is disclosed. In some embodiments, the high voltage inductive adder comprising a first adder circuit and a second adder circuit. The first adder circuit including a first source; a first switch electrically coupled with the first source; a first transformer core; and a first plurality of primary windings wound about the first transformer core and electrically coupled with the first switch. The second adder circuit including a second source; a second switch electrically coupled with the second source; a second transformer core; and a second plurality of primary windings wound about the second transformer core and electrically coupled with the second switch. The high voltage inductive adder comprising one or more secondary windings wound around both the first transformer core and the second transformer core and an output coupled with the plurality of secondary windings.

Claims

1. A high voltage inductive adder comprising:

a first source;

a first switch electrically coupled with the first source;

a first transformer core having a torus shape with a first central aperture, the first transformer core electrically coupled with the first switch via a first primary winding;

a second source;

a second switch electrically coupled with the second source;

a second transformer core having a torus shape with a second central aperture, the second transformer core electrically coupled with the second switch via a second primary winding;

a secondary winding including;

an inner rod disposed within the first central aperture and the second central aperture; and

outer cylinder surrounding the first transformer core and the second transformer core, wherein the outer cylinder and the inner rod are electrically coupled together;

an output coupled with the outer cylinder and the inner rod configured to couple with an external load.

2. The high voltage inductive adder according to claim 1, wherein the outer cylinder comprises a first cylinder surrounding the first transformer core and a second cylinder surrounding the second transformer core, the first cylinder and the second cylinder being electrically connected.

3. The high voltage inductive adder according to claim 1, wherein the high frequency inductive adder produces an output signal at the output having a voltage greater than about 20 kV.

4. The high voltage inductive adder according to claim 1, wherein the output signal has a rise time of less than about 40 ns.

5. The high voltage inductive adder according to claim 1, wherein the output signal has a variable or varying pulse repetition frequency and/or a variable or varying voltage and/or variable or varying pulse width.

6. The high voltage inductive adder according to claim 1, wherein the stray capacitance of the high voltage inductive adder as measured from the secondary is less than 500 pF.

7. The high voltage inductive adder according to claim 1, wherein the stray inductance of the circuit comprising the first source;

the first switch;

the first transformer core; and

the first plurality of primary windings is less than about 30 nH.

8. The high voltage inductive adder according to claim 1, wherein the output signal has a pulse frequency of at least 10 kHz.