The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 18, 2003
Filed:
Sep. 19, 2001
Roozbeh Shahcheraghi, Västerås, SE;
Jarl Sobel, Västerås, SE;
Kent Blomkvist, Västerås, SE;
Hans Ling, Spånga, SE;
ABB AB, Vasteras, SE;
Abstract
A torque transducer for measuring torque transmitted in a rotating as well as a stationary shaft. The torque transducer comprises a transducer shaft arranged with a cylinder-shaped magnetoelastic region fixed to the cylindrical periphery of the transducer shaft, which cylinder-shaped magnetoelastic region is permanently magnetized in the azimuthal direction. The transducer shaft with the cylinder-shaped magnetoelastic region is surrounded by a winding which is supplied by an alternating current. Further, the winding is connected to a phase-sensitive detector According to the present invention, a magnetic and non-linear ferromagnetic material ′ is arranged in physical contact with the cylinder-shaped magnetoelastic region The advantages are that the transducer shaft is manufactured independently of the magnetic properties of the shaft material and may substantially consist of a ferromagnetic material.