Study of wire distribution in a slot of a motor fed by steep fronted pulses for lifetime extension

Duchesne, Sophie; Mihaila, Vasile; Vélu, G.; Roger, Daniel

doi:10.1109/elinsl.2012.6251541

Cited by 7 publications

(3 citation statements)

References 16 publications

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“…Table 5 lists leg state value function of inverter drive configuration Under the assumption that the load is perfectly balanced (all phases are similar), it can be shown that voltage between each phase and the neutral point for star connected motor is function of inverter drive configuration with the following relationship. (17) It can also be shown that voltage between phases for the same star connected motor is function of inverter drive configuration according to the following relationship. (18) It should be noted that, for both phase to phase and phase-neutral voltages, two configurations (configuration n°0 and n°7) are not needed to be taken into account anymore for partial discharge analysis between phases.…”

Section: Inverter Drive Command Analysismentioning

confidence: 99%

Non-Intrusive Partial Discharges Investigations on Aeronautic Motors

Billard

Abadie

Taghia

2016

SAE Technical Paper Series

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. This is an author-deposited version published in : http://oatao.univ-toulouse.fr/ Eprints ID : 18225 Any correspondence concerning this service should be sent to the repository administrator: staff-oatao@listes-diff.inp-toulouse.fr AbstractThe present paper reports non-electrically intrusive partial discharge investigations on an aeronautic motor. Relevancy, robustness and repeatability of partial discharge testing procedures, both on insulating materials characterization and on operating aeronautic equipment are essential to ensure reliability of the aircraft systems. The aim of this paper is to be the very first step of defining such procedures and the associated test equipment.To do so, the paper will start by providing an understanding of partial discharge phenomena and will review typical more electrical aircraft architecture. Key characteristics causing partial discharge risk to increase will be highlighted. The impact of harness length, high performance power electronics and voltage level increase on insulation system is demonstrated.Then, an analysis is carried out from motor design perspective to find out which test procedure is relevant to assess each insulation system performance both at atmospheric and reduced pressures. The study helps to realize the benefits of using multiple test sample and procedure to assess insulation system performance level through the design process of the motor. It is shown that a good agreement observed between stator and representative samples. This paper will also review the ability of the non-intrusive test method to detect partial discharge with a full scope of voltage signal from AC to impulse voltage and under different pressures. The paper concludes with an analysis of results and thoughts about future work regarding motor design taking into account partial discharge risk and evolution of proposed procedure.

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Section: Inverter Drive Command Analysismentioning

confidence: 99%

Non-Intrusive Partial Discharges Investigations on Aeronautic Motors

Billard

Abadie

Taghia

2016

SAE Technical Paper Series

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“…The exact position of each turn remains unknown. The probability to have the input turn near the output one is not negligible [19]; the turn-to-turn voltage may be large and PDs may appear.…”

Section: Introductionmentioning

confidence: 99%

Proposition for Improving the Design of Motor Windings for Low-Pressure Environment

Roger

Ait-Amar

Napieralska‐Juszczak

et al. 2020

IEEE Trans. on Ind. Applicat.

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A new approach is proposed for designing coils free of partial discharges (PDs) for compact machines operating at high altitudes. The proposed method consists in using an enameled wire made with a thin additional resistive layer on the outer surface, which reduces strongly the electrical field in the voids between the wires of random coils. With such a wire, PDs occur only in specific zones situated near the wire connections and a local reinforcement of the insulation can increase strongly the partial discharge inception voltage (PDIV). The paper proposes a theoretical method for determining the properties of the resistive layer. The local reinforcement of the insulation is analysed with an electrostatic simulation and Paschen's law. Measurements confirm the effectiveness of the proposed method.

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“…The winding is not deterministic; it has random properties. The probability to have the input turn adjacent to the output one cannot be neglected [4]. For this case, the full coil voltage is imposed to the turn-to-turn insulation made of two thin polymer layers and cause PD.…”

Section: Introductionmentioning

confidence: 99%

Concentrated winding machines fed by PWM inverters: Insulation design helped by simulations based on equivalent circuits

Roger

Toudji

Duchesne

et al. 2017

2017 IEEE Conference on Electrical Insulation and Dielectric Phenomenon (CEIDP)

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In more electric aircrafts, the fast-fronted pulses imposed by PWM inverters to the motor windings may cause an earlier aging of the thin polymer layers of the electrical insulation system (EIS). In low-pressure environments, the voltage distribution in all the components of the EIS is major issue for designing long-life electrical machines. The voltage stresses in the thin insulating layers of the compact machines must remain under control for avoiding partial discharges (PD). The paper proposes an approach based on High Frequency (HF) equivalent circuits for analyzing the resonances in a motor winding. The paper focuses on the windings of permanent magnet synchronous machines built with one coil per stator slot.

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Study of wire distribution in a slot of a motor fed by steep fronted pulses for lifetime extension

Cited by 7 publications

References 16 publications

Non-Intrusive Partial Discharges Investigations on Aeronautic Motors

Non-Intrusive Partial Discharges Investigations on Aeronautic Motors

Proposition for Improving the Design of Motor Windings for Low-Pressure Environment

Concentrated winding machines fed by PWM inverters: Insulation design helped by simulations based on equivalent circuits

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