Compact shunt for current measurement
US9201099B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 2013 |
| Grant date | Dec 1, 2015 |
| Priority date | — |
| Expiry date | Dec 24, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01G4/33
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.