US 12,231,009 B2
Method for manufacturing stator of rotating electric machine, stator of rotating electric machine, and rotating electric machine
Yukiko Kawano, Ibaraki (JP); Hiroshi Horie, Ibaraki (JP); Hiroshi Hamano, Ibaraki (JP); Hideaki Noto, Ibaraki (JP); Shunsuke Isogai, Ibaraki (JP); Chihiro Oinuma, Ibaraki (JP); and Hirona Tanaka, Ibaraki (JP)
Assigned to Hitachi Astemo, Ltd., Hitachinaka (JP)
Appl. No. 17/798,777
Filed by Hitachi Astemo, Ltd., Hitachinaka (JP)
PCT Filed Jan. 15, 2021, PCT No. PCT/JP2021/001187
§ 371(c)(1), (2) Date Aug. 10, 2022,
PCT Pub. No. WO2021/192531, PCT Pub. Date Sep. 30, 2021.
Claims priority of application No. 2020-055135 (JP), filed on Mar. 25, 2020.
Prior Publication US 2023/0109194 A1, Apr. 6, 2023
Int. Cl. H02K 15/12 (2006.01); H02K 1/16 (2006.01); H02K 3/30 (2006.01); H02K 3/34 (2006.01)
CPC H02K 15/12 (2013.01) [H02K 1/16 (2013.01); H02K 3/30 (2013.01); H02K 3/345 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method for manufacturing a stator of a rotating electric machine in which a coil is wound around a stator core, the method comprising:
a first varnish process of forming a first varnish portion by dropping varnish at a coil disposed on an outermost circumference or an innermost circumference of a coil end portion where the coil protrudes from the stator core and positioned close to the stator core; and
a second varnish process of forming a second varnish portion to provide a non-existence region where varnish is not applied between the first varnish portion and the second varnish portion by dropping varnish at a position farther from the stator core than a position in the first varnish process;
wherein an angle formed by a varnish dropping direction in the first varnish process and an axis of the stator is larger than an angle formed by a varnish dropping direction in the second varnish process and the axis of the stator.