Method and device for AC/DC sensitive current measurement
US9134345B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 10, 2013 |
| Grant date | Sep 15, 2015 |
| Priority date | — |
| Expiry date | Feb 8, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R19/20
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and a device for galvanically isolated, AC/DC sensitive current measurement including a control current transformer having a temporally changeable magnetic control flux which is not coupled to the magnetic flux in a measuring current transformer and forms a magnetic circuit in such a manner that a segment of the magnetic circuit of the measuring current transformer is formed as a shared segment with the magnetic circuit of the control current transformer so that the material forming the shared segment is permeated by the control flux and in connection with a nonlinear magnetic characteristic curve causes a change of the relative permeability in the material forming the segment and thus an induced partial voltage in the secondary winding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.