Abstract: A rotating electric machine of one embodiment includes a stator provided with a stator core having windings of each pole of each phase lap wound thereto; and a rotor provided rotatably with respect to the stator. The stator core is provided with slots each having two or more parallelly connected windings of equal turns count inserted therein.

Abstract: A synchronous reluctance rotary electric machine of an embodiment includes a shaft and a rotor core. The shaft rotates around a rotation axis. The rotor core is fixed to the shaft, includes four layers of hollow parts having a convex shape toward a radially inner side formed for each pole in cross section, and includes bridges between the respective hollow parts and an outer circumferential surface thereof. Then, in each pole, when a center in a circumferential direction is a pole center, both ends in the circumferential direction are pole ends, and the plurality of bridges are a first layer bridge, a second layer bridge, a third layer bridge, and a fourth layer bridge in order from the pole center toward each of the pole ends, a circumferential width between the second layer bridge and the third layer bridge is set to be greater than a circumferential width between the first layer bridge and the second layer bridge and a circumferential width between the third layer bridge and the fourth layer bridge.

Abstract: A synchronous reluctance type rotary electric machine of an embodiment includes a shaft and a rotor core. The shaft rotates around a rotation axis. The rotor core is fixed to the shaft and includes multi-layered hollow parts having a convex shape toward a radially inward side formed for each pole in cross section. Then, when a center in a circumferential direction of one pole is a pole center, a hollow part closest to the shaft among the plurality of hollow parts is a first hollow part, a hollow part positioned next to the first hollow part is a second hollow part, and a hollow part positioned on a side opposite to the first hollow part with respect to the second hollow part is a third hollow part, a width W1 between the first hollow part and the second hollow part on the pole center and a width W2 between the second hollow part and the third hollow part on the pole center are set to satisfy W1?W2.

Abstract: A synchronous reluctance type rotary electric machine of an embodiment includes a shaft, a rotor core, rotor core pressers, a plurality of conductor bars, and short-circuit rings. The shaft rotates around a rotation axis. The rotor core is fixed to the shaft and includes multi-layered hollow parts having a convex shape toward a radially inward side formed for each pole in cross section. The rotor core pressers hold the rotor core by pressing the rotor core from both sides in a rotation axis direction. The plurality of conductor bars are disposed in the hollow parts to extend along the rotation axis and have both ends protruding through the rotor core pressers. The short-circuit rings are provided at both ends of each of the plurality of conductor bars and connect the plurality of conductor bars together. Thus, the conductor bars are fixed to the rotor core pressers.

Abstract: A synchronous reluctance type rotary electric machine of an embodiment has a rotor core. The rotor core includes a plurality of poles, multi-layered hollow parts having a convex shape toward a side radially inward formed for each pole in cross section, and a bridge formed between each of the hollow parts and an outer circumferential surface thereof. When a boundary between two adjacent poles is a pole boundary, a groove is formed on at least one of both sides sandwiching the pole boundary at positions other than on the pole boundary on the outer circumferential surface of the rotor core.

Abstract: A synchronous reluctance type rotary electric machine of an embodiment includes, a rotor core, a plurality of conductor bars, short-circuit rings, a stator core, and multiphase armature windings. The rotor core is provided to be rotatable around a rotation axis, and includes multi-layered hollow parts having a convex shape toward a side radially inward formed for each pole in cross section, and a bridge formed between each of the hollow parts and an outer circumferential surface thereof. The plurality of conductor bars are disposed in the respective hollow parts and extend in an axial direction and over approximately entire length of the rotor core. The short-circuit rings connect the plurality of conductor bars together.

Abstract: A rotating electrical machine includes a stator having a stator core, coil groups, and a rotor. The coil groups include a first coil group located at an outer circumference side of the stator core and a second coil group located at an inner circumference side of the stator core. The first and second coil groups are formed into an annular shape by inserting unit coils into stator core slots so that the coils adjacent in a circumferential direction overlap alternately in a radial direction and so that an inside and an outside of the overlap alternate with each other. The first coil group is disposed to surround an outside of the second coil group. The first and second coil groups are disposed in a concentric manner. The unit coils constituting the second coil group have shorter circumferential lengths than the unit coils constituting the first coil group.

Abstract: A vector-magnetic-property-controlling material according to the present embodiment is subjected to a scratching process in two directions that intersect on the surface of a steel material. An iron core according to the present embodiment is configured from an oriented magnetic steel material which has been subjected to a scratching process in two directions that intersect on the surface thereof.

Abstract: A molded stationary induction apparatus is provided with: a winding the surface of which is covered with resin or an insulating material containing resin; a closed vessel in which the winding is housed and air having pressure exceeding atmospheric pressure is sealed; and a heat exchanger which cools the air in the closed vessel.

Abstract: A permanent magnet type rotary electric machine has a stator, a rotor which is rotatably provided inside the stator, and permanent magnets arranged in a rotor core of the rotor. An angle ? between a straight line connecting the center of the rotor to a middle position between two permanent magnets arranged in the V shape, and a straight line connecting the center of the rotor to an outer circumferential top of one of the permanent magnets has the relation: 0.65<?(=?/(180/P))<0.80 in which P is the number of poles in the rotor. When a rear depth of a slot of the stator core is D, and a burying depth of the permanent magnet in the radial direction of the rotor core is t, D/t=A has the relation: 0.8<A<1.1.

Abstract: A wound iron core according to an embodiment of the present invention is provided with an iron core main body part around which a plurality of iron core materials are wound, and a window part formed at the center of the iron core main body part. The iron core materials each have a cut part at least at one location per winding. The cut parts are disposed so as to be dispersed in the periphery of the window part.

Abstract: A rotating electric machine of one embodiment includes a stator provided with a stator core having windings of each pole of each phase lap wound thereto; and a rotor provided rotatably with respect to the stator. The stator core is provided with slots each having two or more parallelly connected windings of equal turns count inserted therein.

Abstract: A partial discharge measurement device includes: an impulse voltage application unit; a measurement control unit; and first and second partial discharge detection unit. The measurement control unit includes: a first and a second detector level partial discharge counting unit; and a partial discharge resistance evaluation unit. Each of the first and the second detector level partial discharge counting units outputs a first or second detection signal when the first or second detection signal exceeds a predetermined specified value. The partial discharge resistance evaluation unit counts the number of occurrences of partial discharge based on an output from the first and second detector level partial discharge counting unit, and regards the impulse voltage value at which the count value has reached a predetermined value as a partial discharge inception voltage under the repeated impulse voltage application.

Abstract: A wound core is provided with plural wound core materials each having at least one cut portion for every one winding thereof. The wound core is provided with a rectangular window portion at the center thereof. A space factor of the core materials at each of corner portions is less than a space factor of the core materials at each of side portions.

Abstract: According to one embodiment, an electrical machine includes a rotor and an armature. The armature includes first to third stator cores, and an armature coil. The first and second stator cores are arranged along a direction of a rotation axis of the rotor. The third stator core is arranged opposite to the first and second stator cores. The armature coil is provided between the first and second stator cores. The first and second stator cores have a same shape and each include magnetic poles and a first positioning part. The third stator core includes a second positioning part. A relative phase angle of the first stator core and a relative phase angle of the second stator core in the rotation direction are set by using the first positioning part and the second positioning part.