US 12,407,208 B2
Stator of rotating electrical machine
Takuro Tsuji, Kariya (JP); Junichi Sugawara, Kariya (JP); and Yoshihiro Takahara, Toyota (JP)
Assigned to DENSO CORPORATION, Kariya (JP); AISIN CORPORATION, Kariya (JP); and TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by DENSO CORPORATION, Kariya (JP); AISIN CORPORATION, Kariya (JP); and TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Feb. 23, 2023, as Appl. No. 18/173,305.
Claims priority of application No. 2022-031327 (JP), filed on Mar. 1, 2022.
Prior Publication US 2023/0283138 A1, Sep. 7, 2023
Int. Cl. H02K 3/50 (2006.01); H02K 11/25 (2016.01)
CPC H02K 3/50 (2013.01) [H02K 11/25 (2016.01); H02K 2203/09 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A stator for a rotating electrical machine, the stator comprising:
a stator core;
a stator winding located in or around the stator core and having a coil end exposed outside a corresponding end of the stator core;
a neutral busbar connected to the coil end of the stator winding;
a temperature sensor mounted to the neutral busbar; and
a resinous seal comprising an insulating resin, the insulating resin of the resinous seal being arranged to cover an axial end portion of the coil end and the neutral busbar,
the resinous seal being configured to have bubbles formed in the insulating resin, the bubbles being located around the neutral busbar, wherein
the resinous seal has opposing first and second outer surfaces;
the neutral busbar has opposing first and second major surfaces, the first and second major surfaces being arranged to face the respective first and second outer surfaces; and
the bubbles include at least one of:
first bubbles located between the first outer surface of the resinous seal and the first major surface of the neutral busbar; and
second bubbles located between the second outer surface of the resinous seal and the second major surface of the neutral busbar.