Fixed impedance cabling for high voltage surge pulse

Patent metadata

Field	Value
Publication number	US-10168379-B2
Application number	US-201615137194-A
Country	US
Kind code	B2
Filing date	Apr 25, 2016
Priority date	Apr 25, 2016
Publication date	Jan 1, 2019
Grant date	Jan 1, 2019

Abstract

Described herein is a system. The system comprises an output cabling comprising an output wire and a return wire. The system also comprises a surge generator configured to provide a voltage pulse at a first rise time down the output cabling to a device under test. The output wire causes a ring at an initiation of the voltage pulse being provided by the surge generator to the device under test. The return wire is a return leg of the output cabling that is in a parallel path to the output wire and is configured to reduce or eliminate the ring.

First claim

The invention claimed is:

1. A system, comprising:
an output cabling comprising an output wire and a return wire;
a surge generator configured to provide a voltage pulse at a first rise time down the output cabling to a device under test; and
wherein the output wire causes a ring at an initiation of the voltage pulse being provided by the surge generator to the device under test,
wherein the return wire is a return leg of the output cabling that is in a parallel path to the output wire and is configured to reduce or eliminate the ring,
wherein the return wire reduces the first rise time to a second rise time, and
wherein a potential of the return wire is the same as a potential of a component of the output wire.

2. The system of claim 1 , wherein a parasitic capacitance of the output wire and a low mutual inductance of the output wire causes the ring at the initiation of the voltage.

3. The system of claim 1 , wherein the return leg of the output cabling is in the parallel path to a shield of the output wire.

4. The system of claim 1 , wherein the first rise time from 0 to 40 kV occurs in less than or equal to 200 nanoseconds.

5. The system of claim 1 , wherein the output wire is a high voltage coaxial cable, low mutual inductive cable system, or mutual inductive wiring.

6. The system of claim 1 , wherein the output wire comprises a shield and the return wire is fed through the shield from a termination box to the surge generator.

7. The system of claim 1 , wherein the return wire is a 14 gauge insulated wire.

8. The system of claim 1 , wherein the return wire is grounded.

9. The system of claim 1 , wherein the component of the output wire comprises a shield of the output wire.

10. The system of claim 1 , wherein the return wire in the parallel path reduces a current oscillation at a point of a current.

11. The system of claim 1 , wherein a majority of a current is returned through a shield of the output wire to maintaining a low mutual inductance.

12. The system of claim 1 , wherein the second rise time is at least 10% lower than the first rise time.

13. The system of claim 1 , wherein the output cabling comprising a termination box and lead lines.

14. The system of claim 1 , wherein the device under test is a winding of a motor.

Assignees

• Pray Robert
• Skf Ab

Inventors

• Pray Robert

Classifications

• G01R31/346

  Testing of armature or field windings · CPC title

• H01B11/18

  Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor · CPC title

• H02K3/00 Primary

  Details of windings · CPC title

• H01B11/1891

  comprising auxiliary conductors · CPC title

• H01B11/1895

  Particular features or applications · CPC title