Increase the thermal conductivity of high voltage electrical insulation systems

Tomaskova, Tetjana; Svoboda, Michal; Shlykevich, Alexey; Trnka, Pavel

doi:10.1109/epe.2015.7309158

Cited by 5 publications

(4 citation statements)

References 7 publications

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“…The authors in [84] focus on the thermal conductivity of ER with Al2O3 and its dissipation factor (tan δ). For dielectric materials, the higher the value of tan δ means the greater the dielectric loss.…”

Section: A Epoxy Resin With Aluminumoxide Aluminumnitride and Silicmentioning

confidence: 99%

“…For dielectric materials, the higher the value of tan δ means the greater the dielectric loss. In Table VIII [84], the effect of Al2O3 microparticles on the composite performance is summarized. Researchers in [85], state that the impregnation process of superconducting power equipment, low thermal expansion, high dielectric strength and high thermal conductivity are all factors that need to be considered.…”

Section: A Epoxy Resin With Aluminumoxide Aluminumnitride and Silicmentioning

confidence: 99%

mentioning

confidence: 99%

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An Overview of Modern Thermo-Conductive Materials for Heat Extraction in Electrical Machines

2020

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This paper presents a comprehensive review of the modern thermo-conductive materials that have potential to improve the heat extraction in electrical machines by conduction. Currently, there is a significant interest in thermal design and analysis of electrical machines as the demand for high power/torque density is substantially raised in applications such as marine, aerospace, e-mobility and rail. Thermal design engineering has become very important to develop smaller and more efficient electric motors, therefore electrical machine designers need to be more informed with the recent development in novel thermoconductive (insulation) materials. Such developments can provide enhanced thermal characteristics for high power dense electrical machines. It is reported that high voltage electrical insulations can have more sophisticated thermal properties with the recent advancements in materials science. This study aims to inform electrical machine designers with and without a thermal background about recent thermo-conductive materials. Thus, a profound understanding can be gained in thermally conductive materials for the use of numerous applications in electrical machines for which thermal management is a crucial aspect of the overall multi-physics design and optimization process. INDEX TERMS Electrical machines, heat extraction, insulation materials, rotating machines, thermal analysis, thermal design, thermal conduction, and thermal materials This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.

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Section: A Epoxy Resin With Aluminumoxide Aluminumnitride and Silicmentioning

confidence: 99%

Section: A Epoxy Resin With Aluminumoxide Aluminumnitride and Silicmentioning

confidence: 99%

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An Overview of Modern Thermo-Conductive Materials for Heat Extraction in Electrical Machines

2020

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“…in mica paper or adhesive. However, the effect seems limited and the mechanical properties are sacrificed [6][7][8][9]. The second approach is to reduce the mica tape thickness through lowering the addition of adhesive or finding alternative reinforced material.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Mechanic Strength and Thermal Conductivities of Mica Composites with Mimicking Shell Nacre Structure

Tian

Cao

2022

Nanomaterials

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As the main insulation of high-voltage motors, the poor mechanical and thermal conductivities of mica paper restrict the motor’s technological advances. This paper prepared multilayer toughening mica composites with a highly ordered “brick-mud” stacking structure by mimicking the natural conch nacre structure. We investigated the mechanical, thermal, and breakdown properties by combined study of tensile strength, stiffness, thermal conductivity, and breakdown strength at varying mica and nanocellulose contents. The results show that thermal conductivity of the mica/chitosan composites were gradually enhanced with the increase in mica content and the composite shows the optimal synthetic performance at 50 wt% mica content. Further addition of the nanocellulose can extremely enhance the thermal conductivities of mica/chitosan composites. The composite with 5 wt% nanocellulose obtained the maximal thermal conductivity of 0.71 W/(m·K), which was about 1.7 times that of the mica/chitosan composite (0.42 W/(m·K)) and much higher than normal mica tape (0.20 W/(m·K)). Meanwhile, the breakdown strength and tensile strength of mica/chitosan/nanocellulose composite also demonstrated substantial improvement. The application of the mica/chitosan/nanocellulose composite is expected to essentially enhance the stator power density and heat dissipation ability of large-capacity generators and HV electric motors.

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Modeling of Electrical Insulation System of Turbogenerators with a Higher Value of Coefficient of Thermal Conductivity and Associated Ecological Perspectives and Economic Benefit

Tomaskova,

Trnka

2024

2024 International Conference on Diagnostics in Electrical Engineering (Diagnostika)

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Increase the thermal conductivity of high voltage electrical insulation systems

Cited by 5 publications

References 7 publications

An Overview of Modern Thermo-Conductive Materials for Heat Extraction in Electrical Machines

An Overview of Modern Thermo-Conductive Materials for Heat Extraction in Electrical Machines

Enhanced Mechanic Strength and Thermal Conductivities of Mica Composites with Mimicking Shell Nacre Structure

Modeling of Electrical Insulation System of Turbogenerators with a Higher Value of Coefficient of Thermal Conductivity and Associated Ecological Perspectives and Economic Benefit

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