Vibration and noise control strategy in electrical machines
AssigneeSiemens Aktiengesellschaft
InventorJean Le Besnerais
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Abstract
An electrical machine device is disclosed, the electrical machine device including an electrical machine and a converter electrically coupled to the electrical machine. A configuration of the electrical machine generates a first vibration component in the electrical machine and the converter generates a second vibration component in the electrical machine. 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. Further, respective methods and computer programs for controlling a converter or operating a converter are disclosed.
Claims10
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.
A method of operating a converter applying pulse width modulation, the converter being coupleable to an electrical machine that comprises a rotor, a stator and an airgap between said rotor and said stator, the method comprising:
- generating a second vibration component via said pulse width modulation such that the second vibration component at least partially destructively interferes with a first vibration component generated in the electrical machine,
- wherein the first vibration component originates from a configuration of the electrical machine and is generated by a reluctance variation along said airgap of said electrical machine or other harmonics linked with a fundamental current,
- wherein the second vibration component is due to a Maxwell force generated by a pulse width modulation current harmonic, and
- wherein 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.
Dependencies are inferred from the claim text.