US 12,176,777 B2
Rotating electric machine and coil fixing method for rotating electric machine
Takayuki Takatsuka, Kanagawa (JP); Takashi Yanai, Kanagawa (JP); Akihisa Hori, Kanagawa (JP); Akio Tamaru, Kanagawa (JP); Akio Hoshina, Kanagawa (JP); Shuuitsu Aihara, Kanagawa (JP); Toshikazu Nishizawa, Kanagawa (JP); and Osamu Nagata, Kanagawa (JP)
Assigned to NISSAN MOTOR CO., LTD., Yokohama (JP)
Appl. No. 18/578,851
Filed by NISSAN MOTOR CO., LTD., Yokohama (JP)
PCT Filed Jul. 15, 2021, PCT No. PCT/JP2021/026659
§ 371(c)(1), (2) Date Jan. 12, 2024,
PCT Pub. No. WO2023/286250, PCT Pub. Date Jan. 19, 2023.
Prior Publication US 2024/0266896 A1, Aug. 8, 2024
Int. Cl. H02K 3/32 (2006.01); H02K 1/24 (2006.01); H02K 15/10 (2006.01); H02K 15/12 (2006.01)
CPC H02K 3/325 (2013.01) [H02K 1/24 (2013.01); H02K 15/10 (2013.01); H02K 15/12 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A rotating electric machine comprising:
an iron core comprising a slot;
a coil fixed in the slot of the iron core; and
an insulating sheet in which the coil is wrapped, the insulating sheet having a porous structure, wherein:
the coil and the insulating sheet are fixed to each other by an insulating varnish,
the insulating sheet and the iron core are fixed to each other by the insulating varnish that contains at least one type of filler,
the insulating varnish penetrates the insulating sheet from a surface of the insulating sheet to an interior of the insulating sheet so as to form a mixed layer in which the insulating sheet are mixed, and
the mixed layer is formed by penetrating the insulating sheet with the insulating varnish while the insulating varnish is in a dispersion state in which the at least one type of filler is dispersed in the insulating varnish, the dispersion state caused by performing an ultrasonic treatment of irradiating the insulating varnish containing the at least one type of filler with ultrasonic waves.