Abstract: A pipe connection portion of a damper case has an opening opened toward the rear side. In an end surface around the opening in the pipe connection portion, a recess is formed in an inner diameter portion. The recess is recessed to the front side as compared to another portion of the end surface. In an end surface of a pipe member, a groove portion is formed in an outer diameter portion. The groove portion is recessed to the rear side as compared to another portion of the end surface. A first seal member and a second seal member are interposed between the end surface of the damper case and the end surface of the pipe member, and the damper case and the pipe member are sealed by the seal members in a liquid-tight manner.

Abstract: A pipe connection portion of a damper case has an opening opened toward the rear side. In an end surface around the opening in the pipe connection portion, a recess is formed in an inner diameter portion. The recess is recessed to the front side as compared to another portion of the end surface. In an end surface of a pipe member, a groove portion is formed in an outer diameter portion. The groove portion is recessed to the rear side as compared to another portion of the end surface. A first seal member and a second seal member are interposed between the end surface of the damper case and the end surface of the pipe member, and the damper case and the pipe member are sealed by the seal members in a liquid-tight manner.

Abstract: A stator coil that is wound by concentrated winding and installed in a slot of a stator includes a winding part in which a conductor is wound pitch by pitch around a tooth of the stator and connection terminals which extend from both ends of the winding part. The winding part includes a plurality of unit winding subparts of a rectangular annular shape, a unit winding subpart including a pair of first straight-line segments, a pair of second straight-line segments, and curved corner segments which join the first straight-line segments and the second straight-line segments. In one of the pair of first straight-line segments, incline segments where the conductor is shifted by one pitch toward a winding axis direction are formed. In at least one of the unit winding subparts, a part of an incline segment is made by a part of each of the curved corner segments.

Abstract: There is provided a rotor for a rotary electrical machine for improving mechanical strength of the rotor against centrifugal force. The rotary electrical machine is provided with a stator, and a rotor disposed with a gap from the stator, which has a rotor core. The rotor includes a magnet insertion hole, and a permanent magnet inserted into the magnet insertion hole. A clearance part is formed at a position of the magnet insertion hole corresponding to a corner of the inserted permanent magnet, which has a facing surface that is formed to face a surface of the permanent magnet via a gap. The facing surface of the clearance part has inflection points so that each of obtuse angles is formed by the two facing surfaces contiguous with the inflection points.

Abstract: A stator for a rotating electric machine facilitates the assembly of the stator coils and restricts its length in the axial direction. The stator includes a stator iron core having a plurality of teeth and a plurality of stator coils each being wound on one of the teeth. The stator coils include terminal stator coils, each having a crossover wire and a lead wire. Each crossover wire is connected to one of the stator coils of the same phase and each lead wire being is connected to an object other than the stator coils of the same phase. Each end of the crossover wires and the lead wires is disposed at a different level; a first level being the closest to the stator iron core. At least one of the lead wires of the terminal stator coils is disposed at least one level apart within the range of levels.

Abstract: A rotor for a rotating electric machine has interference and lightening holes. The rotor includes a shaft and a rotor iron core. The shaft is press fitted in the rotor iron core. The rotor iron core includes a shaft hole, an outer area, an inner area in which the shaft is press fitted, a plurality of ribs connecting the outer area and the inner area. Each of the ribs includes a plurality of outer rib joints adjacent to the outer area, a plurality of outer rib portions adjacent to the outer area, a plurality of inner rib joints adjacent to the inner area, and a plurality of inner rib portions adjacent to the inner area. The outer rib portions are connected to the inner rib portions and the total number of the inner rib joints is larger than that of the outer rib joints.

Abstract: Provided is a stator of a rotary electric machine in which a bonding portion of ends of coil segments is formed at a coil end of the stator without being inflated toward the opposite side to a stator core, and the coil end can be minimized in an axial direction. The stator of the rotary electric machine includes a stator core (10) having a plurality of slots and a coil segment (30) which is disposed in the stator core to form a stator winding (3). The ends of the coil segments are overlapped in the axial direction, and bonded through the bonding portion. The bonding portion is formed in a shape such that the bonding portion is melted and flows down from the end (6a) of the coil segment on the opposite side to the stator core toward the end (5a) of the coil segment on a side near the stator core.

Abstract: A rotor for a rotating electric machine has interference and lightening holes. The rotor includes a shaft and a rotor iron core. The shaft is press fitted in the rotor iron core. The rotor iron core includes a shaft hole, an outer area, an inner area in which the shaft is press fitted, a plurality of ribs connecting the outer area and the inner area. Each of the ribs includes a plurality of outer rib joints adjacent to the outer area, a plurality of outer rib portions adjacent to the outer area, a plurality of inner rib joints adjacent to the inner area, and a plurality of inner rib portions adjacent to the inner area. The outer rib portions are connected to the inner rib portions and the total number of the inner rib joints is larger than that of the outer rib joints.

Abstract: Provided is a stator of a rotary electric machine in which a bonding portion of ends of coil segments is formed at a coil end of the stator without being inflated toward the opposite side to a stator core, and the coil end can be minimized in an axial direction. The stator of the rotary electric machine includes a stator core (10) having a plurality of slots and a coil segment (30) which is disposed in the stator core to form a stator winding (3). The ends of the coil segments are overlapped in the axial direction, and bonded through the bonding portion. The bonding portion is formed in a shape such that the bonding portion is melted and flows down from the end (6a) of the coil segment on the opposite side to the stator core toward the end (5a) of the coil segment on a side near the stator core.

Abstract: A stator for a rotating electric machine facilitates the assembly of the stator coils and restricts its length in the axial direction. The stator includes a stator iron core having a plurality of teeth and a plurality of stator coils each being wound on one of the teeth. The stator coils include terminal stator coils, each having a crossover wire and a lead wire. Each crossover wire is connected to one of the stator coils of the same phase and each lead wire being is connected to an object other than the stator coils of the same phase. Each end of the crossover wires and the lead wires is disposed at a different level; a first level being the closest to the stator iron core. At least one of the lead wires of the terminal stator coils is disposed at least one level apart within the range of levels.

Abstract: A stator coil that is wound by concentrated winding and installed in a slot of a stator includes a winding part in which a conductor is wound pitch by pitch around a tooth of the stator and connection terminals which extend from both ends of the winding part. The winding part includes a plurality of unit winding subparts of a rectangular annular shape, a unit winding subpart including a pair of first straight-line segments, a pair of second straight-line segments, and curved corner segments which join the first straight-line segments and the second straight-line segments. In one of the pair of first straight-line segments, incline segments where the conductor is shifted by one pitch toward a winding axis direction are formed. In at least one of the unit winding subparts, a part of an incline segment is made by a part of each of the curved corner segments.

Abstract: There is provided a rotor for a rotary electrical machine for improving mechanical strength of the rotor against centrifugal force. The rotary electrical machine is provided with a stator, and a rotor disposed with a gap from the stator, which has a rotor core. The rotor includes a magnet insertion hole, and a permanent magnet inserted into the magnet insertion hole. A clearance part is formed at a position of the magnet insertion hole corresponding to a corner of the inserted permanent magnet, which has a facing surface that is formed to face a surface of the permanent magnet via a gap. The facing surface of the clearance part has inflection points so that each of obtuse angles is formed by the two facing surfaces contiguous with the inflection points.

Abstract: A squirrel-cage rotor includes a rotor core having in its circumferential direction a plurality of slots extending in an axial direction, a plurality of conductor bars stored in each slot of the rotor core and whose ends are projected from an axial direction end surface of the rotor core, and a pair of end rings arranged at the ends of the rotor core and each having a plurality of fitting portions into which the both ends of the conductor bars projecting from the axial direction end surface of the rotor core are fitted. In the conductor bar, among the cross-sectional shape in a plane perpendicular to the axial direction, the shape on the rotor central axis side is a circular arc shape. In the plane perpendicular to the axial direction, a gap is provided on the rotor central axis side of the fitting portion fitted with the conductor bar.

Abstract: A rotating electrical machine includes a stator having a stator core having a plurality of slots formed therein and a plurality of stator coils to be accommodated in the respective slots, and a rotor arranged on an inner peripheral side of the stator. The plurality of slots include a first slot and a second slot, and when a first ratio between the number of coils having the same phase to be accommodated within the first slot and the number of the plurality of coils exceeds a predetermined ratio, and a second ratio between the number of coils having the same phase to be accommodated in the second slot and the number of the plurality of coils is the predetermined ratio or lower, a width of a first slot opening that the first slot has so as to face the rotor side is 0 or wider, and is smaller than a width of a second slot opening that the second slot has so as to face the rotor side.

Abstract: Permanent magnet type rotating electrical machine with rotor core including a plurality of magnet insertion holes, each having a substantially rectangular cross section, for each magnetic pole. A nonmagnetic section is formed at both ends of the magnet insertion hole in a circumferential direction. Between adjacent magnet insertion holes, a bridge section mechanically connects a rotor core section on the outside of the magnet insertion hole and a rotor core section on the inside thereof. Clearance sections for a corner of the permanent magnet inserted in magnet insertion hole projected in the circumferential direction and a radial direction of the rotor are provided at a corner between surface of the magnet insertion hole on the bridge section and a surface on the outside of the rotor and at a corner between surface of the magnet insertion hole on the bridge section and a surface on the inside of the rotor.

Abstract: A squirrel cage rotor includes: a rotor core having a plurality of slots formed in a circumferential direction, each slot extending in an axial direction; a plurality of conductive bars housed within the respective slots of the rotor core and having both ends thereof projecting out from end faces in an axial direction of the rotor core; and a pair of end rings disposed at both ends of the rotor core, each end ring having a plurality of fitting portions into which respective end portions of the conductive bar projecting out from the end faces of the rotor core in the axial direction are fitted. A material of the conductive bar is an aluminum alloy having an aluminum component ratio of 99.00% or more, and a material of the end ring is an aluminum alloy having proof stress higher than that of the material of the conductive bar.

Abstract: Induction electrical rotating machine includes a stator which has plural stator slots 114 formed at a predetermined spacing in a circumferential direction of a stator iron core 111 and in which a stator winding 120 is accommodated in the plural stator slots 114, and a rotor 130 in which a rotor bar 132 extending in an axial direction of the rotor iron core 111 is provided in a plural number at a spacing in a circumferential direction and in which a pair of end rings that shorts the plural rotor bars 132 at ends in the axial direction is provided. A shape of a stator-side end, of a sectional shape within a plane orthogonal to a rotor axial direction of the rotor bar 132, is asymmetrical and a notch 133 is formed.

Abstract: A squirrel-cage rotor includes a rotor core having in its circumferential direction a plurality of slots extending in an axial direction, a plurality of conductor bars stored in each slot of the rotor core and whose ends are projected from an axial direction end surface of the rotor core, and a pair of end rings arranged at the ends of the rotor core and each having a plurality of fitting portions into which the both ends of the conductor bars projecting from the axial direction end surface of the rotor core are fitted. In the conductor bar, among the cross-sectional shape in a plane perpendicular to the axial direction, the shape on the rotor central axis side is a circular arc shape. In the plane perpendicular to the axial direction, a gap is provided on the rotor central axis side of the fitting portion fitted with the conductor bar.