Patent ID: 8508164

Claim:
An electrical machine device, comprising: an electrical machine comprising a rotor, a stator and an airgap between the rotor and the stator; said electrical machine having a configuration which generates a first vibration component in the electrical machine by a reluctance variation along said airgap of said electrical machine or other harmonics linked with a fundamental current; a converter that converts electrical power, the converter being electrically coupled to the electrical machine; and said converter applying a pulse width modulation to generate a second vibration component in the electrical machine, said second vibration component being due to a Maxwell force generated by a pulse width modulation current harmonic; wherein the configuration of the electrical machine and the converter are adapted to each other such that the first vibration component and the second vibration component at least partially interfere destructively, wherein the electrical machine and the converter are configured with respect to each other such that the wave shapes of the first vibration component and the second vibration component are at least similar or identical wherein first vibration component and the second vibration component are in a counterphase and wherein the spatial order of the first vibration component matches the spatial order of the second vibration component.