Thyssenkrupp Presta Ag

Thyssen Krupp Ag

Hochschule Munchen

Martin Meyer

Sebastian Huber

Stefan Sentpali

Christoph Klukowski

A method for the noise modulation of a three-phase synchronous electric motor driven using a vector regulation by means of a motor control unit. Actual values for the rotated current components iand imay be obtained in an open-loop control system, where icorresponds to the magnetization current and icorresponds to the torque-forming current of the synchronous motor. The actual values may be compared with predetermined reference target values, and the differences between the actual values and the reference target values may be converted into control variables to regulate the actual values (i, i) to the reference target values. The magnetization current-forming current component (i) may be adapted using an acoustic controller to a desired acoustic state depending on an acoustic state that was measured by a measuring device and was transmitted to the motor control unit.

Method for the reduction and modulation of noise of an electric motor

The invention relates to a steering column for a motor vehicle, which steering column can be displaced in at least one displacement direction, which comprises, for the purpose of displacement in the displacement direction or in at least one of the displacement directions, a spindle drive driven by a drive motor, which spindle drive has a threaded spindle extending in an axial direction. The drive motor is connected to a part of the steering column, which carries the drive motor, via a damping unit that has a primary connecting part having a first contact surface and a secondary connecting part having a second contact surface, wherein the first and the second contact surface are spaced apart from each other in the axial direction of the threaded spindle, and an elastomer or viscoelastic damping material is arranged between the first and the second contact surfaces.

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St. Gallen, Switzerland

Martin Meyer