Inverter-fed drive stator insulation monitoring based on reflection phenomena stimulated by voltage step excitation

Zoeller, C.; Wolbank, T.M.; Vogelsberger, M. A.

doi:10.1109/ecce.2016.7855213

Cited by 11 publications

(4 citation statements)

References 12 publications

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“…Therefore, only little literature exists regarding the insulation stress due to internal overvoltages, e.g. [21], [25], [38]. In medium voltage drive applications with long connecting cables, medium frequency resonance effects have been reported in [18], [19].…”

Section: Insulation Stressmentioning

confidence: 99%

On Medium Frequency Differential Mode Resonance Effects in Electric Machines

Barnklau

Harnisch

Proske

2021

IEEE Open J. Ind. Applicat.

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This paper deals with medium frequency resonance effects in electrical machine windings, which can be excited by harmonic components of voltage source converters. The topic is getting more and more relevant with steadily increasing switching frequencies. For squirrel-cage induction machines with form-wound coils an algorithm is presented, which allows the prediction of first machine differential mode resonance frequencies already at design stage. Examples of the experimental model verification and interpretation of resonance frequencies complete the article.

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Section: Insulation Stressmentioning

confidence: 99%

On Medium Frequency Differential Mode Resonance Effects in Electric Machines

Barnklau

Harnisch

Proske

2021

IEEE Open J. Ind. Applicat.

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“…These overvoltages are mainly due to two causes: cable length and impedances mismatches. Indeed, propagation mechanisms occur in the cables between the inverter and the motor, leading to wave reflexion phenomena and thus to the formation of overvoltages at the motor terminals [14]. Broadly speaking, voltage impulses behave like waves during their propagation through the cable and can be reflected depending on the frequencies and impedances of the inverter and the motor.…”

Section: Influence Of Various Parametersmentioning

confidence: 99%

Electrical stress mapping in a Type II machine supplied by inverters using Si and SiC‐based components

Acheen

Abadie

Lebey

et al. 2020

IET Electric Power Applications

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The introduction of Silicon Carbide (SiC) based components in the electromechanical chain presents numerous advantages but has consequences on the reliability of the insulation systems in the machine. It is, therefore, necessary to determine whether, under normal operating conditions, phenomena that did not previously exist or were not completely apprehended will appear with the transition to SiC-based inverters. One of these phenomena is partial discharge (PD) and its development in machines, and more precisely in the turn-to-turn, turn-to-ground, and phase-to-phase insulation systems. The present study reports the investigations carried out on a high voltage machine fed by inverters using Silicon (Si) and SiC-based components. It forms part of a general study in which the primary objective is to determine the electrical stress to which the machine is subject, in order to systematically determine the conditions of occurrence of PDs and their consequences on the insulation system lifetime. The following work, which is the first part of the investigation, seeks to perform a thorough electrical stress mapping depending on both geometric and electrical parameters. An analysis of the results will also be presented, as well as thoughts concerning future work, especially regarding the link between electrical constraints and PD activity.

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“…T HE current trend in transport electrification is to supply the electric motor drives with a DC bus voltage of several hundred Volt. It induces electrical risks to persons and requires complex insulation monitoring [1]. Lowering the electric drives voltages down to 48V standard drastically mitigates electrical hazards, which is of particular benefit to transportation applications.…”

Section: Introductionmentioning

confidence: 99%

Control of a Segmented Three-Phase Synchronous Motor With Highly Coupled Subwindings

Cizeron

Ojeda

Béthoux

2023

IEEE Trans. Ind. Electron.

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This article addresses the control issue of a structure enabling the segmentation of three-phase electric drives. The proposed segmentation process offers an additional degree of freedom in terms of voltage rating for power electronics but results in a three-phase system with highly coupled sub-windings. Thus, for such a segmented motor, the true challenge lies in controlling the machine global electromagnetic torque while balancing the power among the different inverters. To tackle this issue, the dq standard synchronous frame is extended to common and differential modes. This approach enables to design a suitable control structure based on an analytical model and physical considerations. The developed model is calibrated with realistic numerical values obtained from a finite element analysis. Finally, an experimental setup allows developing a proof of concept which shows the interest of the proposed control method compared to a standard multiple dq-frame method. The key finding is that the above-mentioned control objective of the segmented synchronous motor can be achieved without additional inductors and despite the severe constraint imposed by such highly coupled segmentation.

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Inverter-fed drive stator insulation monitoring based on reflection phenomena stimulated by voltage step excitation

Cited by 11 publications

References 12 publications

On Medium Frequency Differential Mode Resonance Effects in Electric Machines

On Medium Frequency Differential Mode Resonance Effects in Electric Machines

Electrical stress mapping in a Type II machine supplied by inverters using Si and SiC‐based components

Control of a Segmented Three-Phase Synchronous Motor With Highly Coupled Subwindings

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