US 12,438,422 B2
Coil alignment device and coil alignment method
Akihito Mori, Tokyo (JP); Hiroyuki Yasuda, Tokyo (JP); Kota Hirohashi, Tokyo (JP); Masahiro Yuya, Tokyo (JP); Shunsuke Yamamoto, Tokyo (JP); Kyosuke Yamaguchi, Tokyo (JP); Tetsuya Yokogawa, Tokyo (JP); and Katsuya Ito, Tokyo (JP)
Assigned to Mitsubishi Electric Corporation, Tokyo (JP)
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
Filed on Sep. 26, 2022, as Appl. No. 17/952,799.
Claims priority of application No. 2022-035815 (JP), filed on Mar. 9, 2022.
Prior Publication US 2023/0291291 A1, Sep. 14, 2023
Int. Cl. H02K 15/043 (2025.01)
CPC H02K 15/043 (2025.01) 20 Claims
OG exemplary drawing
 
1. A coil alignment device for forming an annular coil aligned unit by aligning, in an annular shape, a plurality of segment coils each having a pair of leg portions and a connection portion connecting ends of the pair of leg portions, the coil alignment device comprising:
a plate-shaped first jig having a plurality of grooves into which the leg portions of the segment coils are to be inserted and which are arranged at set intervals along a circumferential direction on a first circle located at a first distance from a first point corresponding to a position of a center point of the coil aligned unit such that each groove extends from the first circle toward a radial-direction outer side; and
segment coil inserted in the first jig, from a radial-direction side, by reducing a relative distance to the first jig, wherein
each groove includes:
a storage portion extending along a radial direction so as to have such a first length L1 that allows a plurality of the leg portions to be stored side by side in the radial direction from the first circle, and
a guiding portion further extending from the storage portion toward the radial-direction outer side,
where, among the plurality of grooves arranged along the circumferential direction, the groove into which a first leg portion as one of the leg portions of the segment coil is to be inserted is defined as a first groove, and the groove located toward a first-direction side which is one side in the circumferential direction from the first groove is defined as a second groove,
the guiding portion of each groove is formed in such a first shape that, using, as a fulcrum, the first leg portion inserted in the storage portion of the first groove, a second leg portion as another of the leg portions inserted in the guiding portion of the second groove is movable toward the storage portion of the second groove, and
the second jig is movable so as to press at least one of the second leg portion or the connection portion of the segment coil from the radial-direction outer side, thus causing the second leg portion in the guiding portion of the second groove to be stored into the storage portion of the second groove, wherein,
the storage portion is configured such that, among inner walls on both sides in the circumferential direction, at least an inner wall on one circumferential-direction side has the first length L1 and extends linearly from the first circle, and
the first shape of the guiding portion is made such that, of inner walls on both sides in the circumferential direction of the guiding portion, the inner wall on at least the one side in the circumferential direction is sloped from the radial direction toward a second-direction side which is another side in the circumferential direction,
a slope of the first shape of the guiding portion is configured to have a curvature and a length such that, in a state before pressing of each of the segment coils by the second jig, the connection portion of another segment coil, having its first-leg portions inserted into the groove located between the first leg portion and the second leg portion of one segment coil, are disposable within a range of a rotation angle of the second leg portion.