Electrical treeing in polyethylene: effect of nano fillers on tree inception and growth

Alapati, Sridhar; Thomas, M. Joy

doi:10.1109/ichve.2010.5640769

Cited by 19 publications

(12 citation statements)

References 9 publications

(7 reference statements)

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“…The reliability of the passivation layer under high temperature and high voltage stresses is being investigated. It was reported in [11][12] that nano composite material would increase the partial discharge inception voltage and delay the tree initiation.…”

Section: Future Workmentioning

confidence: 99%

A nano-composite polyamide imide passivation for 10 kV power electronics modules

Zhou

Ang

Mantooth

et al. 2012

2012 IEEE Energy Conversion Congress and Exposition (ECCE)

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High current and voltage handling capabilities are desired in many high-performance power electronic modules. One of the main challenges when integrating a power module is having a highvoltage insulation material that is reliable at all operating temperatures. In this work, the use of a polyamide imide (PAI) material as the high-voltage passivation for the power electronic modules was investigated. The power modules were integrated with a two-step passivation-encapsulation process using the PAI material. The fabricated modules were tested up to 10 kV to evaluate the material insulation properties.

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Section: Future Workmentioning

confidence: 99%

A nano-composite polyamide imide passivation for 10 kV power electronics modules

Zhou

Ang

Mantooth

et al. 2012

2012 IEEE Energy Conversion Congress and Exposition (ECCE)

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“…Adding nano-SiO 2 particles into LDPE can increase the crystal nucleus density, reduce the spherulite size, and enhance the resistance to partial discharge [19]. Montmorillonite (MMT) is a layered silicate mineral with one-dimensional nano-structure.…”

Section: Introductionmentioning

confidence: 99%

Dielectric and AC Breakdown Properties of SiO2/MMT/LDPE Micro–Nano Composites

et al. 2021

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Low-density polyethylene (LDPE) is an important thermoplastic material which can be made into films, containers, wires, cables, etc. It is highly valued in the fields of packaging, medicine, and health, as well as cables. The method of improving the dielectric property of materials by blending LDPE with inorganic particles as filler has been paid much attention by researchers. In this paper, low-density polyethylene is used as the matrix, and montmorillonite (MMT) particles and silica (SiO2) particles are selected as micro and nano fillers, respectively. In changing the order of adding two kinds of particles, a total of five composite materials were prepared. The crystallization behavior and crystallinity of five kinds of composites were observed, the εr and tanδ changes of each material were investigated with frequency and temperature, and the power frequency (50 Hz) AC breakdown performance of materials were measured. The differential scanning calorimetry (DSC) and X-ray diffraction (XRD) results show that the crystallinity of the composites is higher than that of LDPE. Experimental data of dielectric frequency spectra show that the dielectric constants of micro–nano composites and composites with added MMT particles are lower than LDPE, the dielectric loss of composites can be improved by adding MMT particles. The experimental data of dielectric temperature spectra show that the permittivity of SiO2-MMT/LDPE is still at a low level under the condition of 20~100 °C. In terms of breakdown field strength, the SiO2/LDPE composite material increased by about 17% compared with the matrix LDPE, and the breakdown field strength of the materials SiO2-MMT/LDPE and MMT-SiO2/LDPE increased by about 6.8% and 4.6%, respectively.

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“…Similar to the mechanical toughening mechanism of composite materials, plenty of research has been carried out by using fillers to inhibit electrical treeing [40][41][42][43][44][45][46][47][48]. Various properties of these fillers can be modified, and the electrical treeing process can be altered.…”

Section: Introductionmentioning

confidence: 99%

Electrical treeing: A phase-field model

Cai

Wang

et al. 2019

Extreme Mechanics Letters

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Electrical treeing is a commonly observed phenomenon associated with dielectric breakdown in solid dielectrics. In this work, a phase-field model is developed to study the initiation and propagation of electrical trees in two different geometries: a parallel capacitor and a cylindrical capacitor. The model utilizes a continuous field of damage variable to distinguish the localized damaged regions from the undamaged bulk material. Factors that affect electrical tree morphology, including discharge speed and damage mobility, are studied. Electrical treeing tends to exhibit a fractal shape with more branches at a relatively high discharge speed relative to the rate of damage. Furthermore, the effect of fillers on electrical treeing is also studied. Numerical results 2 suggest that fillers of lower permittivity, higher breakdown energy or lower damage mobility will promote fractal treeing and thus resist catastrophic breakdown.

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Electrical treeing in polyethylene: effect of nano fillers on tree inception and growth

Cited by 19 publications

References 9 publications

A nano-composite polyamide imide passivation for 10 kV power electronics modules

A nano-composite polyamide imide passivation for 10 kV power electronics modules

Dielectric and AC Breakdown Properties of SiO2/MMT/LDPE Micro–Nano Composites

Electrical treeing: A phase-field model

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