Integrating fluxgate for magnetostrictive torque sensors

US6871553B2 · kind B2 · utility

Assignee

• Delphi Technologies · US

Inventors

• Malakondaiah Naidu · Troy, US
• Joseph P. Heremans · Troy, US
• Thomas W. Nehl · Shelby Charter Township, US
• John R. Smith · Pittsburgh, US
• Brian Fuller · Rochester Hills, US

Key dates

• Filing date: Mar 28, 2003
• Grant date: Mar 29, 2005
• Expiry date: Jun 24, 2023

Classification

• Technology area (CPC G): Physics
• CPC primary: G01L3/105
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A torque sensing apparatus for picking up a magnetic field of a magnetostrictive material disposed on a shaft, the torque sensing apparatus having: a first integrating ring; a second integrating ring; a first fluxgate return strip and a second fluxgate return strip each being connected to the first integrating ring at one end and the second integrating ring at the other end; an excitation coil; and a feedback coil; wherein the first integrating ring and the second integrating ring are configured to be positioned to pick up flux signals along the entire periphery of the ends of the magnetostrictive material.