IP Library › Granted Patent US 12,348,228
Granted Patent B2
US 12,348,228 · App. 18/512,002 · Granted Jul 1, 2025

Bipolar high voltage pulser

Inventors: Alex Henson (Seattle, WA); Kevin Muggli (Mountlake Terrace, WA); Timothy Ziemba (Bainbridge Island, WA); Kenneth Miller (Seattle, WA)
Assignee: EHT Ventures LLC
H03K3/57H02M3/07
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Quick Facts
Patent No.
US 12,348,228
App. No.
18/512,002
Granted
Jul 1, 2025
Kind
B2
Abstract

A bipolar high voltage bipolar pulsing power supply is disclosed that can produce high voltage bipolar pulses with a positive high voltage pulse greater than about 2 kV followed by a negative high voltage pulse less than about −2 kV with a positive to negative dwell period between the positive high voltage pulse and the negative high voltage pulse. A high voltage bipolar pulsing power supply, for example, can reproduce high voltage pulses with a pulse repetition rate greater than about 10 kHz.

Claims (85)

1. A high voltage bipolar pulsing power supply comprising:

a DC source;

an energy storage capacitor coupled with the DC source;

a first high voltage switch electrically coupled with the DC source and the energy storage capacitor;

a first diode arranged across the first high voltage switch;

a second high voltage switch electrically coupled with the DC source and the energy storage capacitor;

a second diode arranged across the second high voltage switch;

a third high voltage switch arranged in series between the first high voltage switch and ground;

a third diode arranged across the third high voltage switch;

a fourth high voltage switch arranged in series between the second high voltage switch and ground;

a fourth diode arranged across the fourth high voltage switch; and

an output having a first lead electrically coupled between the first high voltage switch and the third high voltage switch and a second lead electrically coupled between the second high voltage switch and the fourth high voltage switch, the output providing a plurality of high voltage pulses where each pulse of the plurality of pulses includes a positive pulse having a voltage greater than about 500 volts and a negative pulse having a negative voltage less than about 500 volts, and wherein the output produces a waveform having a repeating pattern of a plurality of positive pulses followed by one or more negative pulses.

2. The high voltage bipolar pulsing power supply according to claim 1 , wherein the output high voltage pulses with a pulse repetition rate greater than about 10 kHz.

3. The high voltage bipolar pulsing power supply according to claim 1 , wherein the first high voltage switch comprises a first plurality of solid state switches arranged in parallel, the second high voltage switch comprises a second plurality of solid state switches arranged in parallel, the third high voltage switch comprises a third plurality of solid state switches arranged in parallel, and the fourth high voltage switch comprise a fourth plurality of solid state switches arranged in parallel.

4. The high voltage bipolar pulsing power supply according to claim 1 , wherein the first high voltage switch, the second high voltage switch, the third high voltage switch, and the fourth high voltage switch each comprise a switch selected from the group consisting of an IGBT, a MOSFET, a SiC MOSFET, a SiC junction transistor, a FET, a SiC switch, a GaN switch, and a photoconductive switch.

5. The high voltage bipolar pulsing power supply according to claim 1 , wherein the circuit comprising both the DC source and the energy storage capacitor has an inductance less than about 10 nH.

6. The high voltage bipolar pulsing power supply according to claim 1 , wherein a circuit comprising the first high voltage switch and the first diode has an inductance less than about 10 nH.

7. The high voltage bipolar pulsing power supply according to claim 1 , further comprising:

a first tail sweeper switch and a first tail sweeper resistor arranged in series across the first high voltage switch;

a second tail sweeper switch and a second tail sweeper resistor arranged in series across the first high voltage switch;

a third tail sweeper switch and a third tail sweeper resistor arranged in series across the first high voltage switch; and

a fourth tail sweeper switch and a fourth tail sweeper resistor arranged in series across the first high voltage switch.

8. A high voltage, multilevel, bipolar pulsing power supply comprising:

a first DC source;

a first energy storage capacitor coupled with the first DC source;

a diode having an anode and a cathode, the anode electrically coupled with the first DC source and the first energy storage capacitor;

a first high voltage switch electrically coupled with the cathode of the first diode;

a first diode arranged across the first high voltage switch;

a second high voltage switch electrically coupled with the cathode of the first diode and ground;

a second diode arranged across the second high voltage switch;

a third high voltage switch arranged in series between the first high voltage switch

a third diode arranged across the third high voltage switch;

a fourth high voltage switch arranged in series between the second high voltage switch and ground;

a fourth diode arranged across the fourth high voltage switch; and

an output having a first lead electrically coupled between the first high voltage switch and the third high voltage switch and a second lead electrically coupled between the second high voltage switch and the fourth high voltage switch, and wherein the output produces a waveform having multilevel positive pulses followed by a negative pulse.

9. The high voltage, multilevel, bipolar pulsing power supply according to claim 8 , wherein the output provides a plurality of high voltage pulses each pulse of the plurality of high voltage pulses having a first positive pulse with a voltage greater than 500 volts, a second high pulse with a positive voltage greater than the voltage of the first positive pulse, and a negative pulse with a voltage less than −500 volts.

10. The high voltage, multilevel, bipolar pulsing power supply according to claim 8 , wherein the second DC source produces a voltage greater than the first DC source.

11. The high voltage, multilevel, bipolar pulsing power supply according to claim 8 , wherein:

the first high voltage switch, the fourth high voltage switch, and the fifth high voltage switch are closed to produce a voltage at the output equal to a voltage of the second DC source;

the second high voltage switch, the third high voltage switch, and the sixth high voltage switch are closed to produce a voltage at the output equal to a negative voltage of the second DC source;

the first high voltage switch and the fourth high voltage switch are closed to produce a voltage at the output equal to a voltage of the first DC source; and

the second high voltage switch and the third high voltage switch are closed to produce a voltage at the output equal to a negative voltage of the first DC source.

12. The high voltage bipolar pulsing power supply according to claim 11 , wherein the first high voltage switch, the second high voltage switch, the third high voltage switch, the fourth high voltage switch, the fifth high voltage switch, and the sixth high voltage switch each have a capacitance less than about 500 pF.

13. The high voltage bipolar pulsing power supply according to claim 12 , further comprising:

a first tail sweeper switch and a first tail sweeper resistor arranged in series across the first high voltage switch;

a second tail sweeper switch and a second tail sweeper resistor arranged in series across the first high voltage switch;

a third tail sweeper switch and a third tail sweeper resistor arranged in series across the first high voltage switch;

a fourth tail sweeper switch and a fourth tail sweeper resistor arranged in series across the first high voltage switch;

a fifth tail sweeper switch and a fifth tail sweeper resistor arranged in series across the fifth high voltage switch; and

a sixth tail sweeper switch and a sixth tail sweeper resistor arranged in series across the sixth high voltage switch.

14. The high voltage, multilevel, bipolar pulsing power supply according to claim 8 , further comprising:

a second DC source;

a second energy storage capacitor coupled with the second DC source;

a fifth high voltage switch electrically coupled with the second DC source and the second energy storage capacitor;

a fifth diode arranged across the fifth high voltage switch;

a sixth high voltage switch electrically coupled with the cathode of the second DC source and the second energy storage capacitor; and

a sixth diode arranged across the sixth high voltage switch.

15. The high voltage, multilevel, bipolar pulsing power supply according to claim 8 , wherein the negative pulse is a multilevel negative pulse.

16. A high voltage bipolar pulsing power supply comprising:

a DC source;

an energy storage capacitor coupled with the DC source;

a diode having an anode and a cathode, the anode electrically coupled with the DC source and the energy storage capacitor;

a first high voltage switch electrically coupled with the cathode of the diode;

a first diode arranged across the first high voltage switch;

a first tail sweeper switch and a first tail sweeper resistor arranged in series across the first high voltage switch;

a second high voltage switch electrically coupled with the cathode of the diode;

a second diode arranged across the second high voltage switch;

a second tail sweeper switch and a second tail sweeper resistor arranged in series across the first high voltage switch;

a third high voltage switch arranged in series between the first high voltage switch and ground;

a third diode arranged across the third high voltage switch;

a third tail sweeper switch and a third tail sweeper resistor arranged in series across the first high voltage switch;

a fourth high voltage switch arranged in series between the second high voltage switch and ground;

a fourth diode arranged across the fourth high voltage switch;

a fourth tail sweeper switch and a fourth tail sweeper resistor arranged in series across the first high voltage switch; and

an output having a first lead electrically coupled between the first high voltage switch and the third high voltage switch and a second lead electrically coupled between the second high voltage switch and the fourth high voltage switch, the output providing a plurality of high voltage pulses where each pulse of the plurality of pulses includes a positive pulse having a voltage greater than about 500 volts and a negative pulse having a negative voltage less than about −500 volts, and wherein the output produces a waveform having multilevel positive pulses followed by a negative pulse.

17. The high voltage bipolar pulsing power supply according to claim 16 , wherein:

the first tail sweeper switch is closed prior to the first high voltage switch being closed;

the second tail sweeper switch is closed prior to the second high voltage switch being closed;

the third tail sweeper switch is closed prior to the third high voltage switch being closed; and

the fourth tail sweeper switch is closed prior to the fourth high voltage switch being closed.

18. The high voltage bipolar pulsing power supply according to claim 16 , wherein the first high voltage switch, the second high voltage switch, the third high voltage switch, and the fourth high voltage switch each comprise a switch selected from the group consisting of an IGBT, a MOSFET, a SiC MOSFET, a SiC junction transistor, a FET, a SiC switch, a GaN switch, and a photoconductive switch.

19. The high voltage bipolar pulsing power supply according to claim 16 , wherein the first tail sweeper switch, the second tail sweeper switch, the third tail sweeper switch, and the fourth tail sweeper switch each comprise a switch selected from the group consisting of an IGBT, a MOSFET, a SiC MOSFET, a SiC junction transistor, a FET, a SiC switch, a GaN switch, and a photoconductive switch.

20. The high voltage bipolar pulsing power supply according to claim 16 , wherein the circuit between the diode and both the DC source and the energy storage capacitor has an inductance less than about 10 nH.

21. The high voltage bipolar pulsing power supply according to claim 16 , wherein a circuit comprising the first high voltage switch and the first diode has an inductance less than about 10 nH.

22. The high voltage, multilevel, bipolar pulsing power supply according to claim 16 , wherein the negative pulse is a multilevel negative pulse.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 16, 2023
From: HENSON, ALEX; MILLER, KENNETH; MUGGLI, KEVIN; ZIEMBA, TIMOTHY
To: EHT VENTURES LLC
Reel/Frame 065592/0478 →
Continuity (2)
Continuation 17853891 · Jun 29, 2022
Related Publication 20240088877A1 · Mar 14, 2024
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