Patents Assigned to Asea Brown Bovert AB
  • Detection of static and/or quasi-static magnetic fields in magnetoelastic force and torque transducers
    Patent number: 5122742
    Abstract: The content of even harmonics is used in both a method and apparatus for the detection of the disturbing static and quasi-static magnetic fields effects in measurement systems using force and torque transducers operating with magnetoelastic effect. The even harmonic content corresponds to the degree of static and/or quasi-static magnetization and is an input signal to a regulator the aid of the direct current in, for example, a separate winding, reduces the static and/or quasi-static magnetization to zero.
    Type: Grant
    Filed: December 17, 1990
    Date of Patent: June 16, 1992
    Assignee: Asea Brown Bovert AB
    Inventors: Bertil Hoffman, Sverker Nidmark, Jan Palmquist, Jarl Sobel