Spectral composition of stator vibrations resulting from modal superposition in SRM

Fiedler, Jens; Kasper, Knut A.; Doncker, Rik W. De

doi:10.1049/cp:20060103

Cited by 8 publications

(3 citation statements)

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“…Fig.10 shows a comparison of the constructed limiting spectrum and measurements for a 8/6 SRM. The modal composition of the acoustic noise spectrum can be determined according to the theory presented in [14].The limiting envelope spectrum can thus be sampled at the relating frequencies to construct the resulting spectrum which of course employs only multiples of the fundamental electric frequency. In a subsequent step, also an A-weighting characteristic may be added to the spectrum to account for the sound perception of the human ear.…”

Section: E Construction Of Resulting Noise Spectrummentioning

confidence: 99%

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Effectiveness of Noise Reducing Measures in Switched Reluctance Drives

Fiedler¹,

Kasper²,

Chaparro³

et al. 2006

Conference Record of the 2006 IEEE Industry Applications Conference Forty-First IAS Annual Meeting

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Acoustic noise reduction in electrical drives can be achieved by either machine design or control measures. The corresponding strategies affect different parts of the acoustic noise transfer path and they can therefore be divided into different categories such as: reduction of the excitation, increase of transfer path impedance, decrease of radiation efficiency or reduction of the annoyance of the sound. In contrast to the first three strategies, the last does not necessarily result in a reduction of the resulting sound pressure level. Annoyance is a subjective impression but may be characterized well by psycho-acoustic quantities such as loudness, sharpness and tonality [1]. This paper begins with a detailed study of the acoustic noise transfer path. The derived theory is validated by numerical simulation and experiments. Finally, the effectiveness of the different noise reducing strategies as well as trade-offs are discussed.

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Section: E Construction Of Resulting Noise Spectrummentioning

confidence: 99%

“…Depending on the number of active stator poles, some of the harmonics are canceled off the spectrum as shown in [14]. Which harmonics dominate and which are dimished depends strongly on the dominant vibration modes of the stator structure.…”

Section: A Radial Force Excitationmentioning

confidence: 99%

Effectiveness of Noise Reducing Measures in Switched Reluctance Drives

Fiedler¹,

Kasper²,

Chaparro³

et al. 2006

Conference Record of the 2006 IEEE Industry Applications Conference Forty-First IAS Annual Meeting

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“…The finite element modeling of SRM mechanical behavior by modal superposition corresponds to find resonant frequencies associated with strain at resonance [4]. These frequencies are obtained with (1) deduced from Lagrange equations:…”

Section: Finite Element Modeling Of Srmmentioning

confidence: 99%

Noise Reduction Using Piezoelectric Active Control on High Speeds Switched Reluctance Drives

Ojeda¹,

Gabsi²,

Lecrivain³

et al. 2007

2007 IEEE Industry Applications Annual Meeting

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This paper presents an active compensation method of vibrations using piezoelectric inserts applied to a high speeds switched reluctance variable (SRM). The aim of this method is to reduce acoustic emission for SRM. Piezoelectric inserts are considered as actuators: by vibratory acceleration measurement on SRM stator, an adequate voltage is applied to inserts and consequently imposes forces on SRM. This adequate force compensates the structure strain originated by electromagnetic, aerodynamic and mechanical forces. Influences of SRM mechanical component to vibratory problem are studied. Finite element and experimental results are discussed in order to confirm viability of this compensation approach.

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