Abstract:
There are provided an alloy ribbon piece that ensures an increased dimensional accuracy and a method for manufacturing the same. An alloy ribbon piece of the present disclosure includes a crystallized portion excluding an edge portion. The crystallized portion includes a nanocrystalline alloy obtained by crystallizing an amorphous alloy, and the edge portion includes an amorphous alloy.
Abstract:
A cutting method of the invention cuts a flat wire covered with a film, using a pair of first blades, and a second blade that is arranged between the pair of first blades. This cutting method includes a step of forming tapered cuts in an upper surface of the flat wire, by the pair of first blades cutting part way into the flat wire in a thickness direction, from the upper surface of the flat wire, and a step of cutting the flat wire by the second blade, between the two cuts, so as to form a chamfer on both side surfaces next to the upper surface of the flat wire.
Abstract:
After an first heat treatment step, an ambient temperature of a stack is held so that the stack is kept in a temperature range that allows the stack to be crystallized by heating the end of the stack to a second temperature range in the second heat treatment step; and a following expression (1) is satisfied, where Q1 represents an amount of heat required to heat the stack to the first temperature range in the first heat treatment step, Q2 represents an amount of heat that is applied to the stack when heating the end of the stack to the second temperature range in the second heat treatment step, Q3 represents an amount of heat that is released during crystallization of the stack, and Q4 represents an amount of heat required to heat the entire stack to the crystallization start temperature Q1+Q2+Q3≥Q4 (1).
Abstract:
A motor core that ensures reduction of eddy-current loss and improvement of a space factor at the same time is provided. The motor core according to the present disclosure includes a laminated body where a plurality of metal plates are laminated; a fixing member that fixes the plurality of metal plates to each other at a fixing position in a peripheral edge side of the laminated body; and an insulation film disposed between the metal plates in a peripheral edge portion of the laminated body including the fixing position. In a center portion of the laminated body, no insulation film is disposed between the metal plates, or an insulation film thinner than the insulation film in the peripheral edge portion is disposed between the metal plates.
Abstract:
A method of manufacturing a coated conducting wire assembly includes forming a conducting wire assembly by twist-deforming a conducting wire bundle, forming a coated conducting wire assembly by covering the conducting wire assembly with an insulation coating, and annealing the coated conducting wire assembly. The conducting wire bundle is formed by bundling a plurality of conducting wires. The conducting wire assembly includes a parallel portion, a left-wound portion, and a right-wound portion. The annealing is performed by heating and holding the coated conducting wire assembly at an annealing temperature while applying tension to the covered conducting wire assembly.
Abstract:
A manufacturing method and apparatus of insulation coated conducting wire insulation coats a conducting wire having a polygonal cross-sectional shape, by extruding molten resin from an annular discharge hole formed between a nipple and a die that encircles the nipple, while passing the conducting wire through a hole provided in the nipple. The annular discharge hole has a polygonal annular shape substantially similar to the cross-sectional shape of the conducting wire.