The influence of thermal properties of aluminum oxide on electrical insulating materials

Tomaskova, Tetjana; Trnka, Pavel

doi:10.1109/epe.2014.6839422

Cited by 8 publications

(1 citation statement)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2.5 W/(mꞏK) being achievable with high levels of filling [21] - [23]. In [24] - [27] the use of ceramic fillers is examined for high-voltage machines up to a filling level of 25 vol.-%, which doubles the thermal conductivity of the impregnating material from 0.3 W/(mꞏK) to 0.6 W/(mꞏK). As such, the excess temperature of the winding can be reduced by approx.…”

Section: B State Of Research -Ceramic-like Insulation Of Electrical M...mentioning

confidence: 99%

Development of Polymer-Ceramic Composite Materials for the Winding Insulation of Highly Utilized and Energy-Efficient Electrical Machines

Miersch,

Schubert,

Schuhmann

et al. 2023

IEEE Open J. Ind. Applicat.

View full text Add to dashboard Cite

The electromagnetic utilization of an electrical machine can be increased by raising the current density, with a limitation resulting from the maximum permissible temperature of the winding insulation. Conventional insulating materials only have a low specific thermal conductivity, which results in large temperature gradients in the winding cross-section and consequently hotspots. The article presents the development and characterization of ceramic-like composite materials based on filled polysiloxanes for the dip coating of lamination stacks and the impregnation of the winding of electrical machines. The specific equivalent thermal conductivity is determined on composite winding samples, the thermal cycle stability is examined and the microstructure is analyzed with the scanning electron microscope. The manufacturability and the partial discharge behavior are examined based on test samples. The results of tests on an electric traction machine are used to show the potential for increasing the power density.

show abstract

Section: B State Of Research -Ceramic-like Insulation Of Electrical M...mentioning

confidence: 99%

Development of Polymer-Ceramic Composite Materials for the Winding Insulation of Highly Utilized and Energy-Efficient Electrical Machines

Miersch,

Schubert,

Schuhmann

et al. 2023

IEEE Open J. Ind. Applicat.

View full text Add to dashboard Cite

show abstract

A review on analysis and modeling of electrical machine insulation system

Raziq,

Batool,

Nawaz

et al. 2024

Cogent Engineering

View full text Add to dashboard Cite

Investigation of Ceramic-coated Profile Conductors Regarding Insulation Strength with the Aim of Better Thermal Connection to the Laminated Core of Electrical Machines

Weber

Liebetrau

2022

2022 12th International Electric Drives Production Conference (EDPC)

View full text Add to dashboard Cite

This work addresses an alternative approach to electrical insulation of the winding by using ceramic materials such as aluminum oxide, which in addition to good insulation strength also have relatively high thermal conductivity. This can be applied to copper by thermal spray processes, which also allow the use of profiled conductors. In the present work, the determined values for insulation strength and insulation resistance are presented depending on different layer thicknesses and manufacturing parameters, as well as the influence of posttreatments. For this purpose, a special measurement setup is used which records the corresponding data with a large number of contact points and thus takes into account weak points caused by manufacturing variations.

show abstract

The influence of thermal properties of aluminum oxide on electrical insulating materials

Cited by 8 publications

References 8 publications

Development of Polymer-Ceramic Composite Materials for the Winding Insulation of Highly Utilized and Energy-Efficient Electrical Machines

Development of Polymer-Ceramic Composite Materials for the Winding Insulation of Highly Utilized and Energy-Efficient Electrical Machines

A review on analysis and modeling of electrical machine insulation system

Investigation of Ceramic-coated Profile Conductors Regarding Insulation Strength with the Aim of Better Thermal Connection to the Laminated Core of Electrical Machines

Contact Info

Product

Resources

About