Surface modified nano-SiO 2 enhances dielectric properties of stator coil insulation for HV motors

Nano-SiO 2 particles were doped into epoxy resin (EP) to fabricate the main insulation used for high voltage (HV) motors. The EP-based nanocomposite with different mass ratios of nano-SiO 2 particles (0.5, 1, 2.5, and 5 wt%) were prepared. Surface morphology and conductivity of samples were tested,...

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Bibliographic Details
Published in:IEEE transactions on dielectrics and electrical insulation 2020-06, Vol.27 (3), p.1029-1037
Main Authors: Lei, Zhipeng, Men, Rujia, Wang, Fei, Li, Yuanyuan, Song, Jiancheng, Shahsavarian, Tohid, Li, Chuanyang, Fabiani, Davide
Format: Article
Language:English
Subjects:
Alternating current
Coils
Dielectric breakdown
Dielectric loss
Dielectric properties
Electrical faults
Electrical resistivity
Epoxy resins
Insulation
Leakage current
Mass ratios
Morphology
Motors
Nanocomposites
Silicon dioxide
Stators
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Summary:Nano-SiO 2 particles were doped into epoxy resin (EP) to fabricate the main insulation used for high voltage (HV) motors. The EP-based nanocomposite with different mass ratios of nano-SiO 2 particles (0.5, 1, 2.5, and 5 wt%) were prepared. Surface morphology and conductivity of samples were tested, and AC breakdown strength was measured at different temperatures. The mechanisms for the tailoring of dielectric properties of EP were discussed. The optimal doping scheme (0.5 wt%) was selected and used as the base material in preparation of a stator coil insulation for 6 kV motors. The dielectric properties, including dielectric loss and leakage current as well as partial discharge, were tested, and the potential application of nano-SiO 2 particles in the stator coil insulation of HV motors was discussed. The test results showed that the doped nano-SiO 2 particle into dielectric composite used as the main insulation material for HV motors can be an optimal candidate to improve the above mentioned properties especially dielectric losses and electrical breakdown strengths. The results in this paper offer references and a guiding significance for the application of nano-SiO 2 in the insulation of HV motors.
ISSN:1070-9878
1558-4135
DOI:10.1109/TDEI.2020.008736