Behavior of machine insulation systems subjected to accelerated thermal aging test

Farahani, Mohsen; Gockenbach, E.; Borsi, H.; Schafer, Keith; Kaufhold, Martin

doi:10.1109/tdei.2010.5595537

Cited by 87 publications

(41 citation statements)

References 9 publications

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“…Investigations published by different authors showed the effects at deterioration of insulation systems for highvoltage rotating machines as a function of test voltage [5]- [6]. The results show that one reliable parameter for the estimation of insulation degradation is the measured capacitance.…”

Section: Introductionmentioning

confidence: 89%

Evaluation and current-response based identification of insulation degradation for high utilized electrical machines in railway application

Zoeller

Vogelsberger²,

Fasching

et al. 2015

2015 IEEE 10th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives (SDEMPED)

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In order to investigate insulation degradation of high voltage traction drives, series of measurements on form wound coil specimens have been done. These stator bars have been aged by different accelerated aging cycles until the failure of the insulation is determined by voltage exposure tests. After every aging cycle the dissipation factor (tan ) and capacitance (C) of the insulation system is recorded. With these non destructive diagnostic measurements, the correlation between the indicator values (tan , PI, C) and the degradation of the insulation strength until a breakdown can be investigated. Furthermore, an online insulation condition monitoring method for traction drives is proposed. In this method the inverter is used as a source of excitation with a simple switching pattern. The current transducer's transient response at step excitation is used to evaluate a change of the insulation system. The drive system containing machine, cabling and inverter can be represented with a complex network of electrical, also parasitic components like resistances, inductances and capacitances. Insulation degradation within the machine also changes these components as investigated at the accelerated aging tests, and thus the tendency can be used for the monitoring method.

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Section: Introductionmentioning

confidence: 89%

Evaluation and current-response based identification of insulation degradation for high utilized electrical machines in railway application

Zoeller

Vogelsberger²,

Fasching

et al. 2015

2015 IEEE 10th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives (SDEMPED)

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“…[3,4]. Als Richtwert für die Größenordnung der getesteten Kapazitätswerte wurde die identifizierte Wicklungskapazität der Maschine von je 21nF, gemessen von Phase zu Erde bzw.…”

Section: Abb 4 Fourieranalyse Des Transienten Stromverlaufsunclassified

Zustandsüberwachung der Statorisolation von umrichtergespeisten elektrischen Maschinen mittels transienter Stromcharakteristik

Zöller

Vogelsberger²,

Wolbank

2018

Elektrotech. Inftech.

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Stator insulation monitoring of inverter-fed machines based on current transient evaluation. In this paper, a concept for the condition monitoring of the stator insulation of electrical machines is described using the transient current evaluation. In electrical traction applications, the motor is operated via a voltage source inverter which supplies the machine with voltage variable in frequency and amplitude. The inverter-fed drive system can be described in principle by three main components: the inverter, the cabling and the machine, which define a complex impedance system. The motor and inverter represent

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“…It is essentially an oxidation chemical reaction [20], that can be modelled with exponential Arrhenius law.…”

Section: Multistress Insulation Aging Factorsmentioning

confidence: 99%

Multistress Characterization of Fault Mechanisms in Aerospace Electric Actuators

Barater

Immovilli

Soldati

et al. 2017

IEEE Trans. on Ind. Applicat.

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Abstract1 -The concept behind the More Electric Aircraft (MEA) is the progressive electrification of on-board actuators and services. It is a way to reduce or eliminate the dependence on hydraulic, mechanical and the bleed air/pneumatic systems and pursue efficiency, reliability and maintainability. This paper presents a specialised test rig whose main objective is to assess insulation lifespan modelling under various stress conditions, especially investigating the interaction between ageing factors. The test set-up is able to reproduce a multitude of environmental and operational conditions at which electric drives and motors, used in aerospace applications, are subjected. It is thus possible to tailor the test cycle in order to mimic the working cycle of an electrical motor during real operation in aircraft application. The developed test-rig is aimed at projecting the technology readiness to higher levels of maturity, in the context of electrical motors and drives for aerospace applications. Its other objective is to validate and support the development of a comprehensive insulation degradation model.

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Behavior of machine insulation systems subjected to accelerated thermal aging test

Cited by 87 publications

References 9 publications

Evaluation and current-response based identification of insulation degradation for high utilized electrical machines in railway application

Evaluation and current-response based identification of insulation degradation for high utilized electrical machines in railway application

Zustandsüberwachung der Statorisolation von umrichtergespeisten elektrischen Maschinen mittels transienter Stromcharakteristik

Multistress Characterization of Fault Mechanisms in Aerospace Electric Actuators

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