US 12,110,638 B1
Corona-resistant N-grade insulation paper for variable frequency motor and preparation method thereof
Junwen Ren, Sichuan (CN); Qiuwanyu Qing, Sichuan (CN); Shenli Jia, Sichuan (CN); Lihua Zhao, Sichuan (CN); Zi Wang, Sichuan (CN); Fuli Teng, Sichuan (CN); and Guoqing Jiang, Sichuan (CN)
Assigned to Sichuan University, Chengdu (CN)
Filed by Sichuan University, Sichuan (CN)
Filed on Jan. 26, 2024, as Appl. No. 18/424,253.
Claims priority of application No. 202311160579.3 (CN), filed on Sep. 11, 2023.
Int. Cl. D21H 27/38 (2006.01); D21F 5/18 (2006.01); D21F 11/00 (2006.01); D21H 13/26 (2006.01); D21H 13/38 (2006.01); D21H 17/68 (2006.01)
CPC D21H 27/38 (2013.01) [D21F 5/18 (2013.01); D21F 11/00 (2013.01); D21H 13/26 (2013.01); D21H 13/38 (2013.01); D21H 17/68 (2013.01)] 10 Claims
 
1. A corona-resistant N-grade insulation paper for a variable frequency motor, comprising a sandwich structure, wherein
aramid nanofibers and mica nanosheets are taken as a sandwich material of the sandwich structure, aramid nanofibers and silicon carbide nanowires being taken as upper and lower surface layer materials of the sandwich material.