Damping device for a stepper motor
AssigneeVDO Adolf Schindling AG
InventorRoland Sudler
Life of this patent
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Abstract
A device for damping the natural oscillations of the rotor of a stepper motor. A permanent magnet is fixed to the rotor and magnetically coupled with an inertia mass constructed of material with distinct hysteresis. The rotor is damped by conversion of mechanical momentum to hysteresis loss.
Claims8
In a device for damping the natural oscillations of the permanently magnetized rotor of a stepper motor by means of an inertia mass arranged on the motor shaft, the improvement comprising means for magnetically coupling the rotor and the inertia mass, at least one part of the inertia mass comprising magnetizable material with distinct hysterisis and low coercive force.
A device for damping the natural oscillations of the permanent-magnet rotor of a stepper motor by means of an inertia mass arranged on the motor shaft and magnetically coupled with the rotor, comprising, as the inertia mass, a disc of a paramagnetic or diamagnetic material, provided, on a front surface adjacent to a rotor front surface, with a thin layer of a ferromagnetic material.
Dependencies are inferred from the claim text.