Investigations on dielectric properties of enameled wires with nanofilled varnish for rotating machines fed by inverters

Nguyen, Minh-Khai; Malec, David; Mary, D.; Werynski, P.; Górnicka, B.; Thérèse, L.; Guillot, Philippe

doi:10.1109/eic.2009.5166374

Cited by 19 publications

(15 citation statements)

References 11 publications

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“…The authors of this paper propose to add nano or micro silica not to the enamel but to the impregnating resin, because it is also the important part of DIS. The increased in lifetime under pulse voltage by using such silica fillers in varnish was shown recently [5]. This paper presents a comparative study of a Polyetherimide resin with or without fillers.…”

Section: Introductionmentioning

confidence: 97%

DC conduction current, dielectric strength and electroluminescence of standard, nanofilled and microfilled polyetherimide varnishes

Mary

Nguyen

Werynski

et al. 2009

2009 IEEE Conference on Electrical Insulation and Dielectric Phenomena

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Results of DC conduction, breakdown strength and electroluminescence of standard (PEI), nanoscale-filled and microscale-filled varnishes are described and analyzed in this communication. Silica (10nm and 400nm) has been used as a filler to increase the lifetime of such varnishes submitted to a partial discharge activity (varnish to be used in rotating machines fed by inverters). Experimental results have shown that the dielectric properties of the nanofilled varnish, which exhibits the higher PD lifetime under a PD stress, are not highly affected by the fillers. On the contrary, the microfilled varnish properties are strongly modified.

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Section: Introductionmentioning

confidence: 97%

DC conduction current, dielectric strength and electroluminescence of standard, nanofilled and microfilled polyetherimide varnishes

Mary

Nguyen

Werynski

et al. 2009

2009 IEEE Conference on Electrical Insulation and Dielectric Phenomena

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“…In dielectrics all the electrons are bound to their parent molecules and there were no free charges [2]. The dielectrics are non metallic materials with high specific resistance and have negative temperature coefficient of resistance.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Dielectric Properties of Polyamide Enamel Insulation in High Voltage Apparatuses Used in Medical Electronics by Adding Nano Composites of SiO₂and Al₂O₃Fillers

Biju¹,

Victoire²,

Selvaraj³

2015

Journal of Electrical Engineering and Technology

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-In recent days, there was a significant development on the electrical, thermal, mechanical, physical, chemical, magnetic and optical properties of the polyamide enamel, varnish and other insulating materials by the addition of nano fillers to it. Enamel was used in High Voltage Apparatuses used in Medical Electronics as insulation. Insulating materials determine the life time of the electrical apparatuses. The life time of the insulating materials was improved by the addition of nano fillers to it. Hence the life time of the electrical apparatuses was improved by the mixing of nano fillers to the enamel. In this research, the basic dielectric properties of the enamel and enamel mixed with nano composites of silica and alumina were analyzed and compared with each other. The addition of nano fillers has improved the quality factor and capacitance of the enamel. It was also observed that the addition of nano fillers has reduced the dissipation factor and dielectric losses of the enamel. Heat produced by the dielectric losses was also reduced by adding nano fillers to it.

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“…It has been reported that the use of nano composites in the matrix of polymeric materials can greatly improve the thermal, mechanical and electrical properties of polymeric nano composites [4]. In the last few years, a great deal of attention has been given to the application of nano dielectrics in the field of electrical materials.…”

Section: Introductionmentioning

confidence: 99%

Characterization of dielectric properties of the enamel filled with carbon nanotubes for the frequency range of 50 Hz - 5 MHz

Selvaraj¹

2013

IJSEA

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Abstract:It has been observed that the addition of nano fillers to the enamel can greatly improve the dielectric properties of the enamel. Carbon nanotubes have been tested as nano filler. Chemical vapour deposition method was used to synthesize carbon nanotubes. Scanning electron microscope has been used to augment the particle size of carbon nanotubes. These carbon nanotubes were mixed with standard (Elmo Luft 1A-FD) enamel with help of ultrasonic vibrator. The basic dielectric properties such as dielectric loss tangent (tan ), dielectric constant( ), quality factor, phase angle, dielectric conductivity and dielectric power loss of the enamel filled with carbon nanotubes were analyzed and compared with the properties of the standard enamel. These different dielectric properties were found with the help of the Dielectric Spectroscopy. Dielectric constant, dielectric losses, dielectric conductivity and heat generated under AC fields were analyzed for the frequency range of 50 Hz to 5 MHz. At 50 Hz, the enamel filled with 1 wt% of carbon nanotubes has lower dissipation factor and dielectric losses. At 5 MHz, the enamel filled with 3 wt% of carbon nanotubes has lower dissipation factor and dielectric losses.

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Investigations on dielectric properties of enameled wires with nanofilled varnish for rotating machines fed by inverters

Cited by 19 publications

References 11 publications

DC conduction current, dielectric strength and electroluminescence of standard, nanofilled and microfilled polyetherimide varnishes

DC conduction current, dielectric strength and electroluminescence of standard, nanofilled and microfilled polyetherimide varnishes

Enhancement of Dielectric Properties of Polyamide Enamel Insulation in High Voltage Apparatuses Used in Medical Electronics by Adding Nano Composites of SiO₂and Al₂O₃Fillers

Characterization of dielectric properties of the enamel filled with carbon nanotubes for the frequency range of 50 Hz - 5 MHz

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Investigations on dielectric properties of enameled wires with nanofilled varnish for rotating machines fed by inverters

Cited by 19 publications

References 11 publications

DC conduction current, dielectric strength and electroluminescence of standard, nanofilled and microfilled polyetherimide varnishes

DC conduction current, dielectric strength and electroluminescence of standard, nanofilled and microfilled polyetherimide varnishes

Enhancement of Dielectric Properties of Polyamide Enamel Insulation in High Voltage Apparatuses Used in Medical Electronics by Adding Nano Composites of SiO2and Al2O3Fillers

Characterization of dielectric properties of the enamel filled with carbon nanotubes for the frequency range of 50 Hz - 5 MHz

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Enhancement of Dielectric Properties of Polyamide Enamel Insulation in High Voltage Apparatuses Used in Medical Electronics by Adding Nano Composites of SiO₂and Al₂O₃Fillers