Compact high voltage power supply

• US 5,008,798 A
• Filed: 12/21/1989
• Issued: 04/16/1991
• Est. Priority Date: 12/21/1989
• Status: Expired due to Fees

• Current Assignee: Hughes Electronics Corporation (Rtx Corporation)
• Original Assignee: Hughes Aircraft Company (Rtx Corporation)
• Inventors: Harvey, Robin T.
• Primary Examiner(s): Skudy, R.
• Assistant Examiner(s): STERRETT, JEFFREY L
• Application Number:
  US07/454,675
• Time in Patent Office: 481 Days
• Field of Search: 320/1, 363/59, 307/110
• US Class Current: 363/59
• CPC Class Codes: H03F 99/00 Subject matter not provided for in other groups of this subclass
• CPC Class Codes: H03K 17/52 by the use, as active elements, of gas-filled tubes
• 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 power supply having energy storage, charging and switching elements and using an interruptible switch as the switching element for efficient, compact and safe operation. In a specific embodiment, the interruptible switch is implemented with at least one cold cathode grid-controlled, crossed field plasma switch and associated control circuit. The charging element is a Marx bank which can be capacitive or inductive. Embodiments with a single master-slave control arrangement, a pulse-forming network providing high voltage regulation, an inductive implementation with a plurality of switching elements in a single envelope with the cathode of at least one switching element being the anode of the next switching element are disclosed. A current amplifier and voltage regulator implemented with a cold cathode grid-controlled, crossed field plasma switch having a cathode, an anode and a control grid therebetween are disclosed.

Claims

1. A high voltage, Marx bank power supply comprising:

a plurality of energy storage elements;

supply means for charging said energy storage elements; and

switching means for switching said energy storage elements into electrical contact with a load, a said switching means including a plurality of interruptible switches for interrupting current against high voltages, at least one interruptible switch positioned between adjacent energy storage elements and capable of switching current ON or interrupting current in the presence of high voltage to achieve a desired pulse length.

2. A high voltage power supply comprising;

energy storage means;

supply means for charging said energy storage means; and

switching means for switching said energy storage means into electrical contact with a load, said switching means including at least one interruptible switch, wherein said interruptible switch is a cold cathode grid-controlled, crossed field plasma switch.

3. The invention of claim 2 wherein said switching means includes a control circuit associated with each cold cathode grid-controlled, crossed field plasma switch.

4. The high voltage power supply of claim 2 wherein said plasma switch comprises plural switching elements in a single enclosure each switching element including a cathode, a control grid and an anode, the cathode of at least one switching element being the anode of another switching element.

5. A high voltage power supply of claim 2, wherein said energy storage means comprises a plurality of capacitive elements connected in a parallel arrangement;

and

said switching means is for switching said capacitive elements into a series arrangement across a load.

6. The invention of claim 5 wherein said switching means includes a control circuit associated with each said cold cathode grid-controlled, crossed field plasma switch.

7. The invention of claim 5 wherein said switching means includes plural cold cathode grid-controlled, crossed field plasma switches each having a cathode, an anode, and a control grid therebetween.

8. The invention of claim 7 including a master control circuit associated with a first of said plurality of switches, and

wherein said switches other than said first switch are connected to operate in a slave manner with respect thereto.

9. The invention of claim 5 including pulse forming network means for providing a regulator for said power supply.

10. The high voltage power supply of claim 2 wherein said energy storage means comprises a plurality of inductive elements connected in a series arrangement, and

said switching means is for switching said inductive elements into a parallel arrangement across a load.

11. The invention of claim 10 wherein said switching means includes a control circuit associated with each cold cathode grid-controlled, crossed field plasma switch.

12. A high voltage power supply comprising:

a plurality of capacitive elements connected in a parallel arrangement;

supply means for charging said capacitive elements;

switching means for switching said capacitive elements into a series arrangement across a load, said switching means including;

plural cold cathode grid-controlled, crossed field plasma switches, each having a cathode, an anode, and a control grid therebetween,

a control circuit associated with each cold cathode grid-controlled, crossed field plasma switch,

a master control circuit associated with a first of said plurality of switches, said remaining switches being connected to operate in a slave manner with respect to said first switch and

pulse forming network means for providing a regulator for said power supply, said pulse forming network means including a pulse forming network connected between the cathode and the control grid of said first cold cathode grid-controlled, crossed field plasma switch.

13. A high voltage power supply comprising:

a plurality of inductive elements connected in a series arrangement;

supply means for charging said energy storage means;

switching means for switching said inductive elements into a parallel arrangement across a load, said switching means including;

plural cold cathode grid-controlled, crossed field plasma switches, each having a cathode, an anode, and a control grid therebetween,

a control circuit associated with each cold cathode grid-controlled, crossed field plasma switch,

a master control circuit associated with a first of said plurality of switches, said remaining switches being connected to operate in a slave manner with respect to said first switch and

pulse forming network means for providing a regulator for said power supply, said pulse forming network means including a pulse forming network connected between the cathode and the control grid of said first cold cathode grid-controlled, crossed field plasma switch.

14. A high voltage power supply comprising:

a plurality of capacitive elements connected in parallel arrangement;

supply means for charging said plurality of capacitive elements; and

switching means for switching said capacitive elements into a series arrangement across a load, said switching means including at least one cold cathode grid-controlled, crossed field plasma switch.

15. The high voltage power supply of claim 14 wherein said plasma switch comprises plural switching elements in a single enclosure each switching element including a cathode, a control grid and an anode, the cathode of at least one switching element being the anode of another switching element.

16. A high voltage power supply comprising:

a plurality of inductive elements connected in a series arrangement;

supply means for charging said inductive elements; and

switching means for switching said inductive elements into a parallel arrangement across a load, said switching means including at least one cold cathode grid-controlled, cross field plasma switch.

17. The high voltage power supply of claim 16 wherein said plasma switch comprises plural switching elements in a single enclosure each switching element including a cathode, a control grid and an anode, the cathode of at least one switching element being the anode of another switching element.

18. The invention of claim 16 wherein said switching means includes a control circuit associated with said cold cathode grid-controlled, crossed field plasma switch.

19. The invention of claim 16 wherein said switching means includes plural cold cathode grid-controlled, crossed field plasma switches each having a cathode, an anode, and a control grid therebetween.

20. The invention of claim 19 including a control circuit associated with each cold cathode grid-controlled, crossed field plasma switch.

21. The invention of claim 20 including a master control circuit associated with a first of said plurality of switches.

22. The invention of claim 21 wherein said switches other than said first switch are connected to operate in a slave manner with respect thereto.

23. The invention of claim 22 including pulse forming network means for providing a regulator for said power supply.