Noise reducing method for noise in electric machines, using electronic drive devices to preset phase currents so as to minimize an area of critical resonance frequency in a radial force spectrum

摘要

Noise is reduced in electric machines with electronic drive devices (57) for controlling current feed. A stator with numerous poles surrounds a rotor. The electronic drive devices preset phase currents (I1-I3) in such a way that an area of critical resonance frequency is minimized in a radial force spectrum or radial force proportions are minimized in an area of critical resonance frequencies.