Pulse line generators

Details Pulse line generators Pulse line generators

1999-10-28

2001-08-28

Ballato, Josie (Department: 2836)

Electrical transmission or interconnection systems

Electromagnet or highly inductive systems

C307S106000

Reexamination Certificate

active

06281603

ABSTRACT:

BACKGROUND OF THE INVENTION
This invention relates to a pulse line generator, in particularly to a pulse generator having a pulse forming line with an integrated charging transformer.
It is known to provide a pulse generator having a helical type pulse forming line which achieves a pulse duration in the order of 200 to 300 nanoseconds per linear meter of pulse forming line and which is fed by an external transformer. This pulse generator can produce a high voltage pulse, typical greater than 10 kilovolts. However, the pulse forming line and a suitable charging transformer can occupy considerable space. In certain applications the space available for the pulse forming line and its charging transformer is limited.
SUMMARY OF THE INVENTION
The invention arose out of consideration of ways to reduce the dimensions of a pulse generator.
According to the invention a pulse generator comprises a pulse forming line having a helical core winding surrounded by an outer winding, and a transformer having primary and secondary windings, the secondary winding being arranged about the core winding and the primary winding being arranged to co-act with the secondary winding such that the primary winding energizes the secondary winding when a suitable voltage is applied to the primary winding and that the secondary winding through a transformer action charges the pulse forming line.
In this manner a helical pulse forming line and its charging transformer can be combined in a single unit thereby reducing the overall dimensions of the pulse generator.
The core winding and outer winding may be arranged substantially coaxially. The core winding, outer winding and primary and secondary windings may each comprise a plurality of conductors.
Each conductor of the core winding may be helical in configuration and may be formed of ferromagnetic material. The core winding may be covered by a non-magnetic conductive metal.
Preferably, the outer winding may be a containment vessel for the core winding and primary and secondary windings.
The secondary winding may be conical shaped.
The primary winding may be formed of foil which may be enclosed in a ferromagnetic shielding.
The primary and secondary windings may be arranged substantially coaxially with the core winding.
The containment vessel may be substantially filled with dielectric insulation which may be a solid.
Preferably the pulse forming line may be connected to a switch to allow discharge of a pulse from the pulse forming line to a load.
The characteristics of a pulse discharged from the pulse forming line may be adjusted by varying the pitch of each conductor of the core winding.


REFERENCES:
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patent: 4070579 (1978-01-01), Brewster
patent: 4717834 (1988-01-01), Levy
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patent: 5192827 (1993-03-01), Jasper, Jr.
patent: 5412254 (1995-05-01), Robinson et al.
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patent: 5567995 (1996-10-01), O'Loughlin et al.
patent: 5650670 (1997-07-01), Thaxter
patent: 6066901 (2000-05-01), Burkhart et al.

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