Compact shunt for current measurement

Patent metadata

Field	Value
Publication number	US-9201099-B2
Application number	US-201313895811-A
Country	US
Kind code	B2
Filing date	May 16, 2013
Priority date	Jan 25, 2013
Publication date	Dec 1, 2015
Grant date	Dec 1, 2015

Abstract

Conductive strips are stacked, insulated, folded, and formed into geometric shapes to provide a low resistance, low inductance, shunt, wherein the geometric shape readily enables cooling to reduce changes in resistance due to self-heating effects. One such geometric shape is attained by winding the conductive strips into a spiral. Another geometric shape is a shape resembling a wave. Both geometric shapes allow cooling by directing airflow from a fan across their surface portions. A variable-speed cooling-fan is controlled in response to measured temperature of the shunt, or in response to a measurement of the current through the shunt. Differential cooling may be employed by means of changing the amount of airflow across various portions of the shunt in response to measured temperature of the shunt.

First claim

The invention claimed is:

1. A low inductance electrical shunt for use in an electrical circuit, comprising:
multiple elongated conductive strips aligned and stacked to form a stack of conductive layers in overlying relationship;
insulative layers applied centrally to at least one of the multiple strips such that each of the stacked conductive strips are electrically insulated from one another at an insulative region; and
exposed opposite ends on each of the elongated conduct…

Assignees

• Tektronix Inc

Inventors

• Tedd Andrew John
• Ford John Stewart
• Ind Lionel

Classifications

• H01G4/33

  Electricity · mapped topic

• H01G4/30

  Electricity · mapped topic

• G01R1/203 Primary

  Physics · mapped topic