Abstract: A novel dynamo-electrical machine is provided that can inhibit an increase in the height of a coil end positioned toward a turn portion and improve the cooling performance around the turn portion of a segment coil. A segment coil 31 includes a first linear portion 34r, a second linear portion 34a, and a turn portion 33 including a top portion 33c. The first linear portion 34r is inserted into a specified slot 22. The second linear portion 34a is inserted into another particular slot 22 different from the specified slot 22. The turn portion 33 extends from one end face portion of a stator core 21 toward the outside of the axial direction of the stator core 21 and connects the first linear portion 34r and the second linear portion 34a. The linear portions 34r and 34a of the multiple segment coils 31 are inserted and placed in the slots 22 in a layering manner from the inner periphery to the outer periphery in the radial direction.

Abstract: An electrical collecting and distributing member holding structure is composed of a stator including a multiplicity of cores arranged annularly, windings wound around the multiplicity of cores respectively, and an insulator for electrical insulation between the cores and the windings, a plurality of annular electrical collecting and distributing members held around the stator to collect and distribute electric current to the windings, and a holding portion formed on the insulator. The holding portion includes a plurality of recesses formed therein. The plurality of electrical collecting and distributing members are being held in the holding portion in such a manner as to be partially received in the plurality of recesses, respectively.

Abstract: Slot insulating paper is slot insulating paper inserted into a slot of a stator core of a rotary electric machine and configured to insulate the stator core and a coil arranged in the slot, the slot insulating paper including: an outer circumferential portion located outside the coil in a radial direction of the stator core. A recessed part which is recessed in a second side in an axial direction of the stator core when viewed from the radial direction and in which a recession of the recessed part is formed in a curved shape when viewed from the radial direction is formed in an edge on a first side of the outer circumferential portion in the axial direction thereof.

Abstract: An electrical collecting and distributing member holding structure is composed of a stator including a multiplicity of cores arranged annularly, windings wound around the multiplicity of cores respectively, and an insulator for electrical insulation between the cores and the windings, a plurality of annular electrical collecting and distributing members held around the stator to collect and distribute electric current to the windings, and a holding portion formed on the insulator. The holding portion includes a plurality of recesses formed therein. The plurality of electrical collecting and distributing members are being held in the holding portion in such a manner as to be partially received in the plurality of recesses, respectively.

Abstract: There is provided a rare-earth permanent magnet optimized to an IPM type motor for a car, capable of improving corrosion resistance, abrasion resistance, and impact resistance. The rare-earth permanent magnet 16 is configured by forming an electroplated Ni coating film 21, of which thickness is 15 ?m or more and 30 ?m or less and of which shape is a columnar crystal structure, on a surface of a R—Fe—B system permanent magnet (R is a rare-earth element) 22. The electroplated Ni coating film 21 has a high hardness region, where the Vickers hardness is 300 or more and 600 or less, and a low hardness region, where the Vickers hardness is 150 or more and 300 or less. The rare-earth permanent magnet 16 is used in a state where the rare-earth permanent magnet 16 is inserted into a slot of a yoke in a rotor of an IPM type motor for a car.

Abstract: [Problem] To provide a process for producing a permanent magnet for use in an automotive IPM motor, which excels in all of corrosion resistance, abrasion resistance, and impact resistance. [Means for Resolution] The production process characterized in that it comprises forming on the surface of an R—Fe—B based permanent magnet a 3 to 15 ?m thick Ni film as a first layer by electroplating method, followed by a 3 to 15 ?m thick Cu or Sn film as a second layer by electroplating method, and a 4 to 7 ?m thick Ni—P alloy film as a third layer by electroless plating method, provided that the third layer has a Vicker's hardness of 2.5 to 4.5 with respect to the Vicker's hardness of the Cu or Sn electroplated film provided as the second layer taken as 1.