Electric current sensor employing hall effect generator
US5416407A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 11, 1993 |
| Grant date | May 16, 1995 |
| Priority date | — |
| Expiry date | Jun 11, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/07
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electric current sensor employing a Hall effect generator to be used in measuring electrical currents flowing in an electrical conductor. The sensor comprises an amplifier, a constant current source, a gapped toroid core mounted on the component side of a printed circuit board (PCB), a Hall effect generator extending via its output leads from the PCB into the gap of the toroid core, and an inductive loop positioned at the edge of the gap of the toroid core. The inductive loop itself comprises a simple trace formed on the component side of the PCB together with its plated-through-holes extending from the component of the PCB to the printed circuit (clad) side of the PCB. The PCB inductive loop placed at the edge of the gap of the toroid core and connected in series opposition to the output leads of the Hall effect generator, compensates for the unwanted induced voltages in the output leads of the Hall generator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.