Abstract: This machine includes: a rotor; sliprings that are placed on an outer circumferential surface of an end portion of a shaft located on one end side thereof and projecting from the rotor; a brush assembly that has a cylindrical shape with an open end located near a head of the shaft, to thereby surround the sliprings; and brushes that penetrate in the brush assembly toward the sliprings from their radially outer sides and make contact with the sliprings, for supplying a current to the sliprings; wherein, on an inner circumferential surface of the brush assembly near the open end, a first wall that extends in a circumferential direction and a second wall that forms, between it and the first wall, a flow passage that leads in the circumferential direction from a region corresponding to a penetrating region of the brush, to an outside thereof, are formed.

Abstract: A winding-start receiving groove in which a winding-start lead wire of a field coil is received is formed in an inner surface of a flange of an insulation bobbin. A holder is disposed on the flange and located on a radially outer side of the winding-start receiving groove. The holder is formed with a holder groove located on an extension line of the winding-start receiving groove and extending at an angle relative to a radial direction of the insulation bobbin. The winding-start lead wire of the field coil is received in the winding-start receiving groove and the holder groove and held by the holder. This makes it possible to obtain a rotor of a rotary electrical machine with a simplified configuration at low cost not only to improve winding workability but also to enhance electrical reliability and durability.

Abstract: A detachment prevention portion extending in a circumferential direction of a flange portion of a bobbin from a neck portion of a locking portion provided so as to extend radially outward from the flange portion is formed such that a length by which the detachment prevention portion extends to one side in the circumferential direction is longer than a length by which the detachment prevention portion extends to another side in the circumferential direction. Accordingly, interference between cover portions and a field coil winding or between the cover portions and a winding jig for the winding during operation of winding a lead wire of the winding can be inhibited while electric insulation between a field coil and claw-shaped magnetic poles is ensured.

Abstract: First side surfaces 22bb of first magnetic pole portions 22b and second side surfaces 23bb of second magnetic pole portions 23b that face each other in a circumferential direction are configured into parallel flat surfaces, first circumferentially tapered portions 25b are formed on circumferential shoulder portions of the first magnetic pole portions 22b, second circumferentially tapered portions 26b are formed on circumferential shoulder portions of the second magnetic pole portions 23b, and portions of the first and second circumferentially tapered portions 25b and 26b enter a region 24 in which the first side surfaces 22bb and the second side surfaces 23bb that face each other in the circumferential direction overlap when viewed from a direction that is perpendicular to the first side surfaces 22bb and the second side surfaces 23bb.

Abstract: A method for manufacturing a laminated iron core includes setting a blanking position on a strip-shaped workpiece for iron core pieces each including a yoke piece part having a linear shape and a magnetic pole piece part extending from the yoke piece part, such that a pair of iron core pieces are opposed each other and the magnetic pole piece part of one iron core piece is arranged between adjacent magnetic pole piece parts of the other iron core piece among the pair of iron core pieces, simultaneously blanking a front end side of the magnetic pole piece part and a back surface side of the yoke piece part of the one iron core piece from the strip-shaped workpiece before simultaneously blanking those of the other iron core piece from the strip-shaped workpiece, and blanking the iron core pieces from the strip-shaped workpiece.

Abstract: A winding-start receiving groove in which a winding-start lead wire of a field coil is received is formed in an inner surface of a flange of an insulation bobbin. A holder is disposed on the flange and located on a radially outer side of the winding-start receiving groove. The holder is formed with a holder groove located on an extension line of the winding-start receiving groove and extending at an angle relative to a radial direction of the insulation bobbin. The winding-start lead wire of the field coil is received in the winding-start receiving groove and the holder groove and held by the holder. This makes it possible to obtain a rotor of a rotary electrical machine with a simplified configuration at low cost not only to improve winding workability but also to enhance electrical reliability and durability.

Abstract: First side surfaces 22bb of first magnetic pole portions 22b and second side surfaces 23bb of second magnetic pole portions 23b that face each other in a circumferential direction are configured into parallel flat surfaces, first circumferentially tapered portions 25b are formed on circumferential shoulder portions of the first magnetic pole portions 22b, second circumferentially tapered portions 26b are formed on circumferential shoulder portions of the second magnetic pole portions 23b, and portions of the first and second circumferentially tapered portions 25b and 26b enter a region 24 in which the first side surfaces 22bb and the second side surfaces 23bb that face each other in the circumferential direction overlap when viewed from a direction that is perpendicular to the first side surfaces 22bb and the second side surfaces 23bb.

Abstract: In a rotor of the present invention, an interference is set to have a relationship so that an inner diameter of a press-fit projecting portion before press-fitting is smaller than a diameter of a shaft, and in the inner wall surface, a non-projecting portion is formed without projecting portions on a portion in which a weld line is generated by the molding.

Abstract: A detachment prevention portion extending in a circumferential direction of a flange portion of a bobbin from a neck portion of a locking portion provided so as to extend radially outward from the flange portion is formed such that a length by which the detachment prevention portion extends to one side in the circumferential direction is longer than a length by which the detachment prevention portion extends to another side in the circumferential direction. Accordingly, interference between cover portions and a field coil winding or between the cover portions and a winding jig for the winding during operation of winding a lead wire of the winding can be inhibited while electric insulation between a field coil and claw-shaped magnetic poles is ensured.

Abstract: A method for manufacturing a laminated iron core includes setting a blanking position on a strip-shaped workpiece for iron core pieces each including a yoke piece part having a linear shape and a magnetic pole piece part extending from the yoke piece part, such that a pair of iron core pieces are opposed each other and the magnetic pole piece part of one iron core piece is arranged between adjacent magnetic pole piece parts of the other iron core piece among the pair of iron core pieces, simultaneously blanking a front end side of the magnetic pole piece part and a back surface side of the yoke piece part of the one iron core piece from the strip-shaped workpiece before simultaneously blanking those of the other iron core piece from the strip-shaped workpiece, and blanking the iron core pieces from the strip-shaped workpiece.

Abstract: A lead wire connection structure includes a rectifier that is arranged at the outside or the inside in an axis direction of the brackets so as to rectify AC voltage, which is generated on the stator, to DC voltage; in which, when a number of conductors of a connecting portion, at which lead conductors of the stator winding and the rectifier are connected, is “N” (N is integer and greater than or equal to 2) per one position, conductors, of which number is less than or equal to “N?1” per one position, are connected at the connecting portion, and conductors excepted from the conductors, of which number is less than or equal to “N?1”, are welded onto the remaining conductors at a position being nearer the stator winding side than the connecting portion.

Abstract: There is provided a rotor of a rotating electrical machine including a pair of field core bodies that are provided so as to enclose the field coil via the insulation bobbin around which the field coil is wound, in which a claw-shaped magnetic pole extending from an outer circumferential section of the field core body in an axial direction is provided on the field core body. The insulation bobbin has a plurality of flange sections extending from the base section of the claw-shaped magnetic pole along an inner surface of the claw-shaped magnetic pole of the field core body, and a plurality of thin portions are formed in the root section of the flange section at intervals in a circumferential direction.

Abstract: An automotive rotary electric machine has a cooling fan including a flat ring-shaped mounting base plate fixed to a rotor, and a plurality of fan blades arranged in a row circumferentially such that each stands on a surface of the mounting base plate, the fan blades having an S-shaped cross-sectional shape that displaces gradually forward in a direction of rotation from a trailing edge that is an outer circumferential edge toward a leading edge that is an inner circumferential edge, and in which an arc shape near the trailing edge that is convex forward in the direction of rotation and an arc shape near the leading edge that is convex rearward in the direction of rotation are connected smoothly.

Abstract: The stator winding has winding assemblies that are disposed in a stator core so as to be stacked in three or more layers in a radial direction such that slot-housed portions line up in single columns in a clot depth direction inside slots, and radial widths of return portions of the winding assemblies that are mounted so as to be stacked in a radial direction are made sequentially narrower in order of return portions of a winding assembly that is positioned centrally, return portions of a winding assembly that is positioned on an inner circumferential side, and return portions of a winding assembly that is positioned on an outer circumferential side.

Abstract: The stator winding has winding assemblies that are disposed in a stator core so as to be stacked in three or more layers in a radial direction such that slot-housed portions line up in single columns in a slot depth direction inside slots, and radial widths of return portions of the winding assemblies that are mounted so as to be stacked in a radial direction are made sequentially narrower in order of return portions of a winding assembly that is positioned centrally, return portions of a winding assembly that is positioned on an inner circumferential side, and return portions of a winding assembly that is positioned on an outer circumferential side.

Abstract: A winding assembly includes: slot-housed portions housed inside each of the slots of the stator core so as to form pairs that line up in an inner layer and an outer layer relative to a slot depth direction; first return portions at a first axial end of the stator core that link end portions of the slot-housed portions housed in the inner layer inside each of the slots and end portions of the slot-housed portions housed in the outer layer inside the slots that are (N?M) slots away; and second return portions at a second axial end of the stator core that link end portions of the slot-housed portions housed in the outer layer inside each of the slots and end portions of the slot-housed portions housed in the inner layer inside the slots that are (N+M) slots away.

Abstract: There is provided a rotor of a rotating electrical machine including a pair of field core bodies that are provided so as to enclose the field coil via the insulation bobbin around which the field coil is wound, in which a claw-shaped magnetic pole extending from an outer circumferential section of the field core body in an axial direction is provided on the field core body. The insulation bobbin has a plurality of flange sections extending from the base section of the claw-shaped magnetic pole along an inner surface of the claw-shaped magnetic pole of the field core body, and a plurality of thin portions are formed in the root section of the flange section at intervals in a circumferential direction.

Abstract: The stator winding has winding assemblies that are disposed in a stator core so as to be stacked in three or more layers in a radial direction such that slot-housed portions line up in single columns in a slot depth direction inside slots, and radial widths of return portions of the winding assemblies that are mounted so as to be stacked in a radial direction are made sequentially narrower in order of return portions of a winding assembly that is positioned centrally, return portions of a winding assembly that is positioned on an inner circumferential side, and return portions of a winding assembly that is positioned on an outer circumferential side.

Abstract: An automotive rotary electric machine has a cooling fan including a flat ring-shaped mounting base plate fixed to a rotor, and a plurality of fan blades arranged in a row circumferentially such that each stands on a surface of the mounting base plate, the fan blades having an S-shaped cross-sectional shape that displaces gradually forward in a direction of rotation from a trailing edge that is an outer circumferential edge toward a leading edge that is an inner circumferential edge, and in which an arc shape near the trailing edge that is convex forward in the direction of rotation and an arc shape near the leading edge that is convex rearward in the direction of rotation are connected smoothly.

Abstract: In a rotor of the present invention, an interference is set to have a relationship so that an inner diameter of a press-fit projecting portion before press-fitting is smaller than a diameter of a shaft, and in the inner wall surface, a non-projecting portion is formed without projecting portions on a portion in which a weld line is generated by the molding.