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Thermal conductivity and dielectric properties of high thermal conductive adhesives in the large generator insulation materials

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Abstract

It had been researched the thermal conductivity and dielectric properties of high thermal conductive (HTC) main insulation for the large and medium generator stator bars. The thermal conductivity was analyzed by orthogonal test for the adhesive composed of BN powders and Tung-maleic-anhydride epoxy resin, and the BN with different particle sizes were used in the adhesive. It analyzed the variation of thermal conductivity for the adhesive composite with different BN powder contents, and the best thermal conductivity in the adhesives was 2.27 W/(m K). The variation of the dielectric properties was analyzed for the HTC adhesive by frequency-domain spectrum. It was detected by scanning electron microscope for the dispersion of the BN particles in TAEP and the bond state between the BN particles. The results indicated that the thermal conductivity of the best adhesives was increased by 13 times, and the other properties were almost the same as that of TAEP. Therefore, the HTC adhesive could be used in the main insulation of the large generator stator bars.

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Acknowledgements

This project was supported by the Natural Science Foundation of Heilongjiang Province of China (Grant Number ZD2018011); and State Key Laboratory Breeding Base of Dielectrics Engineering of Harbin University of Science and Technology (Grant Number KF20151101).

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Authors and Affiliations

  1. State Key Laboratory of Hydropower Equipment, Harbin, 150040, China

    Hongjun Gao, Qiang Fu, Shaobo Guan, Chao Feng, Chenwei Huang & Yu Jiang

  2. National Engineering Research Center Hydropower Equipment, Harbin, 150040, China

    Hongjun Gao, Qiang Fu, Shaobo Guan, Chao Feng, Chenwei Huang & Yu Jiang

  3. Harbin Institute of Large Electric Machinery, Harbin, 150040, China

    Hongjun Gao, Qiang Fu, Shaobo Guan, Chao Feng, Chenwei Huang & Yu Jiang

  4. Harbin Electric Machinery Company Limited, Harbin, 150040, China

    Hongjun Gao, Qiang Fu, Shaobo Guan, Chao Feng, Chenwei Huang & Yu Jiang

  5. State Key Laboratory Breeding Base of Dielectrics Engineering, Harbin University of Science and Technology, Harbin, 150080, China

    Liang Liang, Zhiduo Shan, Qingguo Chen, Lizhu Liu & Ling Weng

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  1. Hongjun Gao
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  2. Liang Liang
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  3. Zhiduo Shan
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  4. Qiang Fu
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  6. Lizhu Liu
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  7. Ling Weng
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  9. Chao Feng
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  10. Chenwei Huang
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  11. Yu Jiang
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Correspondence to Qiang Fu or Qingguo Chen.

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Gao, H., Liang, L., Shan, Z. et al. Thermal conductivity and dielectric properties of high thermal conductive adhesives in the large generator insulation materials. Electr Eng 104, 1811–1820 (2022). https://doi.org/10.1007/s00202-021-01434-y

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  • DOI: https://doi.org/10.1007/s00202-021-01434-y

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