<strong>Development and Application of High Thermal Conductivity Main Insulation Materials for Large Generator</strong>——<strong>Influence of BN Filler on Properties of Epoxy Adhesive</strong>

Development and Application of High Thermal Conductivity Main Insulation Materials for Large Generator——Influence of BN Filler on Properties of Epoxy Adhesive

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Xiangqian XING¹, Shize LIU², Xueping FENG², Qiang FU³^,⁴^,⁵^,⁶^,⁷, Shaobo GUAN³^,⁴^,⁵^,⁶^,⁷, Chao FENG³^,⁴^,⁵^,⁶^,⁷, Chengwei HUANG³^,⁴^,⁵^,⁶^,⁷, Yuming WANG⁸

Insulating Materials | 2021, 54(6) : 10 - 17

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Insulating Materials | 2021, 54(6): 10-17

• Special Issue on Thermal Conductive Insulating •

Development and Application of High Thermal Conductivity Main Insulation Materials for Large Generator——Influence of BN Filler on Properties of Epoxy Adhesive

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Xiangqian XING¹, Shize LIU², Xueping FENG², Qiang FU³^,⁴^,⁵^,⁶^,⁷, Shaobo GUAN³^,⁴^,⁵^,⁶^,⁷, Chao FENG³^,⁴^,⁵^,⁶^,⁷, Chengwei HUANG³^,⁴^,⁵^,⁶^,⁷, Yuming WANG⁸

Affiliations

¹Gansu Electric Power Pearl Group Corporation, Lanzhou 730070, China

²Liujiaxia Hydro Power Station, State Grid Gansu Electric Power Company, Yongjing 731600, China

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

⁴State Key Laboratory of Hydropower Equipment, Harbin 150040, China

⁵Hadong National Engineering Research Center-Hydropower Equipment Company Limited, Harbin 150040, China

⁶National Engineering Research Center-Hydropower Equipment, Harbin 150040, China

⁷Harbin Electric Machinery Company Limited, Harbin 150040, China

⁸Sinohydro Engineering Bureau 4 Co., Ltd., Yongjing 731600, China

Published: 2021-06-20 doi: 10.16790/j.cnki.1009-9239.im.2021.06.002

Outline

Abstract

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The most important component of high thermal conductivity main insulation material for large generators is high thermal conductive epoxy adhesive. As an important component of high thermal conductive epoxy adhesive, BN powder can improve the thermal conductivity of epoxy resin, but it would affect other properties. In this paper, the researches of high thermal conductivity main insulation materials were analyzed and summarized. It was found that BN powder can inhibit the generation and aggregation of space charge in BN/epoxy composites effectively, and reduce the threshold electric field of space charge in BN/epoxy composites. The addition of BN powder could reduce the electric strength of BN/epoxy composites, under the same BN mass fraction, the electric strength of micron BN/epoxy composites was lower, and the conductivity of the composites could be reduced more effectively by nano BN than by micro BN. The surface flashover voltage of the composite decreased after charging on its surface. Then the research direction of high thermal conductivity adhesives in the main insulation materials for large generators in China was proposed.

Key words

high thermal conductive adhesive / BN filler / space charge / electric strength / volume resistivity / surface flashover voltage

Cite this Article

Xiangqian XING, Shize LIU, Xueping FENG, Qiang FU, Shaobo GUAN, Chao FENG, Chengwei HUANG, Yuming WANG. Development and Application of High Thermal Conductivity Main Insulation Materials for Large Generator——Influence of BN Filler on Properties of Epoxy Adhesive[J]. Insulating Materials, 2021 , 54 (6) : 10 -17 . DOI: 10.16790/j.cnki.1009-9239.im.2021.06.002

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Year 2021 volume 54 Issue 6

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Article Info

doi: 10.16790/j.cnki.1009-9239.im.2021.06.002

Receive Date：2020-12-27
Online Date：2026-03-03
Published：2021-06-20

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History

Received：2020-12-27
Revised：2021-03-22

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