Reduction of hysteresis in a magnetoelastic torque sensor

Details Reduction of hysteresis in a magnetoelastic torque sensor Reduction of hysteresis in a magnetoelastic torque sensor

2007-12-18

2007-12-18

Patel, Harshad (Department: 2855)

Measuring and testing

Dynamometers

Responsive to torque

Reexamination Certificate

active

11232602

ABSTRACT:
A torque sensor assembly includes a reduced hysteresis by imparting a magnetoelastic ring with a first remnant magnetic field and a second remnant magnetic field that are disposed in opposite orientations. The first and second magnetic fields are spaced apart such that a third magnetic field is created within the magnetoelastic ring. The third magnetic field is a loosely pinned magnetic domain that imparts a negative hysteresis within the magnetoelastic ring. The negative hysteresis imparted to the magnetoelastic ring provides for the countering of positive hysteresis created by the application of torque.

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