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Modulations diagnosis of asynchronous motors stator current in case of load torque oscillations

Trajin, Baptiste Modulations diagnosis of asynchronous motors stator current in case of load torque oscillations. (2020) In: Prognostics and System Health Management Conference (PHM), 4 May 2020 - 7 May 2020 (Besançon, France).

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Official URL: https://ieeexplore.ieee.org/abstract/document/9115538


This paper proposes a novel method for the prediction of stator current modulations applied to the detection of load torque oscillations in asynchronous drives. In faulty cases, the stator current presents amplitude and phase modulation (AM - PM) leading to sideband frequency components in the current spectrum. The characteristics of these modulations depends on the electrical and mechanical parameters of the drive, on the fault frequency and on the operating point. The knowledge of these properties mean helpful information for the definition of a detection scheme. A full analytic approach is then proposed to predict the faulty stator current behavior. This theoretical analysis is based on the state space representation of the induction machine and allows expressing the frequency variation law of the sideband components for a given drive. Amplitude and phase modulation indexes are determined using proposed model that is validated with experimental results.

Item Type:Conference or Workshop Item (Paper)
Additional Information:© 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including eprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The original document is available on : https://ieeexplore.ieee.org/abstract/document/9115538
HAL Id:hal-02880899
Audience (conference):International conference proceedings
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Institution:Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
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Deposited On:17 Jun 2020 09:39

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