Wednesday, 2 July 2014

Hysteresis

(1) the phenomenon that the magnetic state of a substance is dependent upon its magnetic history, so that its magnetization for an increasing magnetizing force differs from that for a decreasing magnetizing force.

(2) the characteristic of magnetic materials that causes the trajectory of the flux density vs. field intensity curve as the intensity is increased to be different from that when the intensity is decreased, giving rise to a loss, which is proportional to the area enclosed by the two trajectories.

Hysteresis Brake
A braking device utilizing hysteresis to provide a constant braking torque irrespective of slip speed.

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