NHK Spring Patente

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Provided is a positioning method and a jig, capable of accurately aligning phases of a plurality of iron core pieces. The positioning method for a rotor core 3 in which a plurality of core pieces 1 are stacked, the iron core pieces including key portions 9, relatively rotates a fixed contact portion 13 and a rotary contact portion 15 being respectively contactable with one sides and the other sides of the key portions 9 in the circumferential direction, relatively moves the key portions 9 in the circumferential direction between the fixed contact portion 13 and the rotary contact portion 15 by the relatively rotating, and respectively brings the fixed contact portion 13 and the rotary contact portion 15 into contact with the one side and the other side of the key portion 9 of each core piece 1 in the circumferential direction, to hold the key portions 9 between the fixed contact portion 13 and the rotary contact portion 15 to align the phases of the plurality of the core pieces 1 stacked.

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Provided is a welding method capable of suppressing variation in welding inside an assembly. The welding method that brings a conductive wire 15 and a terminal 17 inside an assembly 1 into contact with each other to be welded, drives a jig 19 operable from an outside of the assembly 1 to make contact between the conductive wire 15 and the terminal 17. The welding is performed between the conductive wire 15 and the terminal 17 while controlling driving force of the jig 19 to apply a predetermined pressing force.

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Provided is a welded part inspection device capable of easily and surely determining quality of a welded part while easily capturing an image of the welded part. The welded part inspection device 1 for inspecting a welded part 5 of a stator 3 in which adjacent coil ends 17 of a plurality of segment coils 10 are joined together by welding, includes an image-capturing unit 23 that captures an image of the welded part 5, a monitor 25 positioned on an opposite side in an image-capturing direction across the welded part 5 with respect to the image-capturing unit 23 to display a background image 31 for the welded part 5, a control unit 27 configured to cause the monitor 25 to display the background image 31 and cause the image-capturing unit 23 to capture the image of the welded part 5 together with the background image 31, and determine a shape of the welded part 5 in contrast with the background image 31 based on a captured image according to the image-capturing.

A stator for a rotating electrical machine including: a stator core having a plurality of slots; and a stator coil formed by segment coils, each of which is configured using a flat wire with a rectangular cross section, is inserted into different slots spaced apart from each other in a circumferential direction of the stator core, and has a pair of insertion portions that are inserted into the different slots and an interconnecting portion that interconnects the pair of insertion portions, wherein when Ns denotes a slot pitch, which is the pitch of the slots into which the pair of the insertion portions of each of the segment coils are inserted, and S denotes the total number of slots in the stator core, the following relational expression (1) is satisfied. Ns < S / 4 <img class="EMIRef" id="10d455a2-cade-4e79-b94c-a5c24a8b5608-ia01" />

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A stator for a rotating electrical machine, wherein when the number of slots per pole per phase, which is a value obtained by dividing the number of the slots by the number of magnetic poles of a rotor and the number of phases of alternating current generated in a stator coil, is 2, and when P denotes a magnetic pole pitch, which is a value obtained by dividing the number of the slots by the number of the magnetic poles of the rotor, and k denotes the difference between a slot pitch, which is the pitch of the slots on a side where segment coils are inserted, and the magnetic pole pitch, one of the slot pitches in an outermost layer or an innermost layer of a stator core on the insertion side is set to P + 1 and the other is set to P - 1, and one of the slot pitch in a middle layer between the outermost layer and the innermost layer of the stator core on the insertion side or the pitch of the slots on a side where joint end portions joined to each other project is set to P + k and the other is set to P - k.

Provided is a collective board capable of improving work efficiency for obtaining individual circuit boards from a collective board in which the circuit boards are juxtaposed in a lattice shape. The collective board is provided with a product portion 3 in which a plurality of circuit boards 17 having a circuit pattern 15 on an insulating substrate 13 are juxtaposed in a first direction and a second direction intersecting each other in a lattice shape, a slit 7 spanning between at least ends of the product portion 3 in the first direction and penetrating, in a thickness direction, a portion between the circuit boards 17 adjacent to each other in the second direction, a coupling portion 9 coupling the circuit boards 17 adjacent to each other in the second direction at least at one end of the product portion 3 in the first direction, and grooves 11 spanning between ends of the product portion 3 in the second direction, being located between the circuit boards 17 and the coupling portion 9 adjacent to each other in the first direction and between the circuit boards 17 adjacent to each other in the first direction, and non-penetrating in the thickness direction.

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Provided is a method for producing a release film-attached circuit-pattern aggregate that enables prevention of a defect due to etching from a front face. Provided is a method for producing a release film-attached circuit-pattern aggregate, a circuit-pattern aggregate (2) including a dummy pattern (4) disposed in a gap (G) located between a plurality of circuit patterns (3) and a first gap (G1) located between the dummy pattern (4) and each circuit pattern (3), the method including: a step of providing, to a back face of a metal plate (9), a first back-face recess (G1R) corresponding to the first gap (G1) and a second back-face recess (G2R) corresponding to a second gap (G2) located between conductive patterns (3a); a step of applying a release film (5) to adhere to the back face of the metal plate (9) provided with the first back-face recess (G1R) and the second back-face recess (G2R); and a step of removing, by etching, a first portion corresponding to the first back-face recess (G1R) and a second portion corresponding to the second back-face recess (G2R) on a front face of the metal plate (9).

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