US 12,355,326 B2
Dynamo-electric machine
Satoshi Nishimoto, Kumamoto (JP); and Hirofumi Kinoshita, Kumamoto (JP)
Assigned to HIRATA CORPORATION, Kumamoto (JP)
Appl. No. 17/911,273
Filed by HIRATA CORPORATION, Kumamoto (JP)
PCT Filed Mar. 31, 2020, PCT No. PCT/JP2020/014740
§ 371(c)(1), (2) Date Sep. 13, 2022,
PCT Pub. No. WO2021/199236, PCT Pub. Date Oct. 7, 2021.
Prior Publication US 2023/0056326 A1, Feb. 23, 2023
Int. Cl. H02K 5/08 (2006.01); H02K 1/04 (2006.01); H02K 3/52 (2006.01)
CPC H02K 5/08 (2013.01) [H02K 1/04 (2013.01); H02K 3/522 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A dynamo-electric machine comprising:
a tubular stator;
a rotor disposed in an internal space of the stator;
a tubular or bottomed tubular case configured to accommodate the stator;
an end cover mounted on an open end of the case on one side; and
a circuit substrate configured to control driving of the dynamo-electric machine,
wherein the stator includes a stator core having a plurality of protruding portions that protrude toward a center of the stator, an insulator mounted on the stator core, and a coil formed by winding a winding wire around each of the plurality of protruding portions with the insulator therebetween,
the end cover includes a cylindrical portion having a cylindrical shape that extends in an axial direction, and a lid portion that is connected to one side of the cylindrical portion in the axial direction,
the circuit substrate is disposed inward of an outer end of the case in the axial direction and is disposed between the stator and a tip end of the cylindrical portion of the end cover,
the insulator includes an annular portion, an engaging portion that extends from an outer peripheral side of the annular portion to one side in the axial direction, and a substrate-side contact portion that comes into contact with a surface of the circuit substrate on the stator side, and
the circuit substrate comes into contact with and engages with the insulator due to the substrate-side contact portion and the engaging portion,
wherein the dynamo-electric machine further comprises:
a first insulation sheet which is disposed between the stator and the circuit substrate and insulates the circuit substrate and the coil, and
a second insulation sheet which is disposed between the circuit substrate and the tip end of the cylindrical portion of the end cover and insulates the circuit substrate and the end cover.