Aging phenomenology and modeling

Montanari, Gian Carlo; Simoni, L.

doi:10.1109/14.237740

Cited by 218 publications

(107 citation statements)

References 6 publications

Supporting

Mentioning

105

Contrasting

Unclassified

Order By: Relevance

“…11 More recently, Montanari and coworkers have further developed the modeling of aging and degradation of electrical insulation by improving the understanding of physical phenomena that occur during the aging. [12][13][14][15] Their work with partial discharge measurements to monitor electrical tree growth in degrading samples continues to advance aging investigation. 12 Building on Toop's model, they also present the theoretical background to relate lifelines for the aging compensation effect theory.…”

Section: Kaptonmentioning

confidence: 99%

Electrothermal lifetime prediction of polyimide wire insulation with application to aircraft

Hondred

Bowler

Kessler

2013

J of Applied Polymer Sci

View full text Add to dashboard Cite

This work investigates the electrothermal lifetime of a commonly used polyimide wire insulation material, Kapton V R , through the use of thermogravimetry (TG) and breakdown voltage testing. From TG, an isoconversional model-free kinetic evaluation was used to obtain a relationship between the activation energies of degradation for Kapton as a function of weight loss. By relating the electrical life theory and the TG theory through the model defined by Toop (IEEE Trans. Dielectr. Electr. Insul. 1971, 6, 2), the electrothermal lifetime of Kapton has been calculated for conditions of 12 and 14.7 kV over a temperature range of 250-400C. The resulting model can be used to make lifetime predictions for wire insulation degradation in aging aircraft for improved safety and risk assessment.

show abstract

Section: Kaptonmentioning

confidence: 99%

Electrothermal lifetime prediction of polyimide wire insulation with application to aircraft

Hondred

Bowler

Kessler

2013

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…Considering the separated action of the differential and the common-mode voltages, the lifetime can be estimated considering a multi-stress model as in [24]. When simultaneous stress are applied, they normally produce a degradation effect which is far greater than the one obtained by the sum of the single aging rates, but slightly lower than the one derived by a simple multiplicative law.…”

Section: Effects Of Common-mode Voltage On the Transformer Lifetimementioning

confidence: 99%

A PV-Inspired Low-Common-Mode Dual-Active-Bridge Converter for Aerospace Applications

Buticchi

Barater

Costa

et al. 2018

IEEE Trans. Power Electron.

View full text Add to dashboard Cite

Abstract-In the framework of the More Electric Aircraft, the use of isolated DC/DC power conversion for the electrical power distribution system is one of the most investigated solutions. If the DC/DC converter produces a variable common-mode voltage, leakage current can flow in the inter-winding parasitic capacitance of the high-frequency transformer, leading to insulation deterioration and early failure. This paper proposes to use modified H-bridge structures, already employed in the photovoltaic system for DC/AC power converters, to enable constant common-mode voltage for isolated DC/DC converters. The analysis shows that this solution can achieve the same efficiency as the conventional one, while simulations and experiments show a strong reduction of the common-mode current flowing through the transformer. A reliability analysis showed that the lifetime of the high-frequency transformer can be extended with the proposed solution.

show abstract

“…As shown in other works, ageing due to simultaneously applied constant stresses can be accurately modelled by the product of the ageing rate due to the single stresses, with the addition of a proper correction term [4]. Therefore, the lifetime L of a winding under both constant thermal and thermo-mechanical stresses can be represented by (3), where G is the correction term proposed in [4].…”

Section: (2)mentioning

confidence: 99%

“…From an electrical machine perspective this unavoidably involves insulation degradation and lifetime modelling. In [4] a comprehensive review of general approaches used for lifetime modelling of such systems can be found. Another important aspect of EMA systems is that these are usually operating with low-rate duty cycles (e.g.…”

Section: Introductionmentioning

confidence: 99%

Lifetime Consumption and Degradation Analysis of the Winding Insulation of Electrical Machines

Sciascera

Galea

Giangrande

et al. 2016

8th IET International Conference on Power Electronics, Machines and Drives (PEMD 2016)

View full text Add to dashboard Cite

In this paper, a novel multi-stress model which estimates the lifetime of the winding insulation relative to its duty cycle is proposed and investigated. With an adequate implementation of this model, then an electrical machine can be designed not only in terms of its performance requirements, but also considering the associated reliability and lifetime aspects. Since thermal and thermo-mechanical stresses are considered as the main ageing factors, the model is particularly suited for low voltage, low duty cycle machines. The determination of the model parameters is based on the results of accelerated thermo-mechanical ageing tests, whose procedure is thoroughly reported in the paper. The results of the accelerated ageing tests show that the effect of thermomechanical ageing is significant even for small size, random wound windings under fast temperature rise.

show abstract

Aging phenomenology and modeling

Cited by 218 publications

References 6 publications

Electrothermal lifetime prediction of polyimide wire insulation with application to aircraft

Electrothermal lifetime prediction of polyimide wire insulation with application to aircraft

A PV-Inspired Low-Common-Mode Dual-Active-Bridge Converter for Aerospace Applications

Lifetime Consumption and Degradation Analysis of the Winding Insulation of Electrical Machines

Contact Info

Product

Resources

About