Device for measuring electric current intensity
US7256574B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 2003 |
| Grant date | Aug 14, 2007 |
| Priority date | — |
| Expiry date | Oct 6, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/006
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A magnetic field generated by a primary winding (1) in which the current (i1) to be measured flows is balanced by a magnetic field of opposing direction generated by a secondary winding (2) in which a compensating current (i2) flows. The device includes a member (3) sensitive to the field resulting from the addition of the magnetic fields of opposing directions to regulate the compensating current (i2) in closed loop mode. According to the invention, the, sensitive member (3) is sensitive only to the direction of the resultant field and, in return, controls the reversal of the direction of circulation of the compensating current (i2) in the secondary winding (2). This sensitive member (3) can be formed by a Hall effect probe with bipolar output signal. The device is suitable for the measurement of a current inautomotive electronics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.