公开(公告)号：US20190293688A1

公开(公告)日：2019-09-26

申请号：US16360038

申请日：2019-03-21

Applicant: ABB Schweiz AG

Inventor： Rolf Disselnkoetter ,  Roberto Ottoboni ,  Sergio Toscani

IPC: G01R15/20

Abstract: A device for measuring electric current includes: a plurality of magnetic field sensor elements positioned along one or more continuous closed paths encircling a current carrying conductor, each sensor element being sensitive to one vector component of a magnetic field generated by the electric current, vector directions of sensitivity for each sensor element being oriented to be tangential with the closed path at each sensor location, each sensor element generating an output signal, the output signal of each sensor element being amplified by an element-specific gain factor, the amplified output signals of the sensor elements being electronically combined to form a measurement signal representing a value proportional to the current flowing in the current carrying conductor. At least one sensor element on a closed path has a sensitivity which is different from sensitivities of other sensor elements on a same path.

公开(公告)号：US11029342B2

公开(公告)日：2021-06-08

申请号：US16360038

申请日：2019-03-21

Applicant: ABB Schweiz AG

Inventor： Rolf Disselnkoetter ,  Roberto Ottoboni ,  Sergio Toscani

IPC: G01R15/20 ,  G01R15/18

Abstract: A device for measuring electric current includes: a plurality of magnetic field sensor elements positioned along one or more continuous closed paths encircling a current carrying conductor, each sensor element being sensitive to one vector component of a magnetic field generated by the electric current, vector directions of sensitivity for each sensor element being oriented to be tangential with the closed path at each sensor location, each sensor element generating an output signal, the output signal of each sensor element being amplified by an element-specific gain factor, the amplified output signals of the sensor elements being electronically combined to form a measurement signal representing a value proportional to the current flowing in the current carrying conductor. At least one sensor element on a closed path has a sensitivity which is different from sensitivities of other sensor elements on a same path.