Abstract: A motor control method controls a motor having windings of a plurality of phases and a cooling water channel. The motor control calculates an estimated maximum temperature of the winding of the phase that reaches a highest temperature from among the windings of the plurality of phases based on the input electrical power when the motor is in a lock state. The motor control further calculates an offset value based on a detected temperature of the windings and a detected temperature of the cooling water, and corrects the estimated maximum temperature based on the temperature of the windings and the offset value. The motor control further controls the input electrical power according to the estimated maximum temperature.

Abstract: A rotating electric machine includes: a stator core having a plurality of slots aligned along a circumferential direction; a stator having a stator coil with an enamel coating inserted into the slots of the stator core; and a rotor rotatably arranged over the stator core through a given gap. The stator coil includes: main coils of a plurality of phases in which a plurality of segment coils each having a rectangular cross-section wire formed into a substantially U-shaped wire in advance is connected to each other; a first sub-coil having a lead wire led from the slots and attached with an AC terminal, and connected to one end of the respective main coils; and a second sub-coil having a neutral wire led from the slots, and connected to the other end of the respective main coils. The lead wire and the neutral wire are each formed of a wire with a bend structure having a plurality of straights and bends.

Abstract: A rotating electric machine includes: a stator core having a plurality of slots aligned along a circumferential direction; a stator having a stator coil with an enamel coating inserted into the slots of the stator core; and a rotor rotatably arranged over the stator core through a given gap. The stator coil includes: main coils of a plurality of phases in which a plurality of segment coils each having a rectangular cross-section wire formed into a substantially U-shaped wire in advance is connected to each other; a first sub-coil having a lead wire led from the slots and attached with an AC terminal, and connected to one end of the respective main coils; and a second sub-coil having a neutral wire led from the slots, and connected to the other end of the respective main coils. The lead wire and the neutral wire are each formed of a wire with a bend structure having a plurality of straights and bends.

Abstract: A rotating electric machine includes: a stator core having a plurality of slots aligned along a circumferential direction; a stator having a stator coil with an enamel coating inserted into the slots of the stator core; and a rotor rotatably arranged over the stator core through a given gap. The stator coil includes: main coils of a plurality of phases in which a plurality of segment coils each having a rectangular cross-section wire formed into a substantially U-shaped wire in advance is connected to each other; a first sub-coil having a lead wire led from the slots and attached with an AC terminal, and connected to one end of the respective main coils; and a second sub-coil having a neutral wire led from the slots, and connected to the other end of the respective main coils. The lead wire and the neutral wire are each formed of a wire with a bend structure having a plurality of straights and bends.

Abstract: A rotating electrical machine includes: a stator core; a stator winding; and a rotor. Cross conductors connect slot conductors to run astride slots with the slot pitch N+1 at coil ends on one side and run astride slots with the slot pitch N?1 at coil ends on another side, with N representing a number of slots per pole; the stator winding includes slot conductor groups each having a plurality of slot conductors; the plurality of slot conductors in each slot conductor group are inserted at a predetermined number NS of successive slots so that the slot conductors in the slot conductor group take successive slot positions and successive layer positions; and the number NS is set so that NS=NSPP+NL when NSPP represents a number of slots per phase per pole and a number of layers is expressed as 2×NL.

Abstract: A rotating electric machine includes: a stator core having a plurality of slots aligned along a circumferential direction; a stator having a stator coil with an enamel coating inserted into the slots of the stator core; and a rotor rotatably arranged over the stator core through a given gap. The stator coil includes: main coils of a plurality of phases in which a plurality of segment coils each having a rectangular cross-section wire formed into a substantially U-shaped wire in advance is connected to each other; a first sub-coil having a lead wire led from the slots and attached with an AC terminal, and connected to one end of the respective main coils; and a second sub-coil having a neutral wire led from the slots, and connected to the other end of the respective main coils. The lead wire and the neutral wire are each formed of a wire with a bend structure having a plurality of straights and bends.

Abstract: A rotating electric machine includes: a stator core having a plurality of slots aligned along a circumferential direction; a stator having a stator coil with an enamel coating inserted into the slots of the stator core; and a rotor rotatably arranged over the stator core through a given gap. The stator coil includes: main coils of a plurality of phases in which a plurality of segment coils each having a rectangular cross-section wire formed into a substantially U-shaped wire in advance is connected to each other; a first sub-coil having a lead wire led from the slots and attached with an AC terminal, and connected to one end of the respective main coils; and a second sub-coil having a neutral wire led from the slots, and connected to the other end of the respective main coils. The lead wire and the neutral wire are each formed of a wire with a bend structure having a plurality of straights and bends.

Abstract: A rotating electrical machine includes: a stator core; a stator winding; and a rotor. Cross conductors connect slot conductors to run astride slots with the slot pitch N+1 at coil ends on one side and run astride slots with the slot pitch N?1 at coil ends on another side, with N representing a number of slots per pole; the stator winding includes slot conductor groups each having a plurality of slot conductors; the plurality of slot conductors in each slot conductor group are inserted at a predetermined number NS of successive slots so that the slot conductors in the slot conductor group take successive slot positions and successive layer positions; and the number NS is set so that NS=NSPP+NL when NSPP represents a number of slots per phase per pole and a number of layers is expressed as 2×NL.

Abstract: A rotating electrical machine includes: a stator core; a stator winding; and a rotor. Cross conductors connect slot conductors to run astride slots with the slot pitch N+1 at coil ends on one side and run astride slots with the slot pitch N?1 at coil ends on another side, with N representing a number of slots per pole; the stator winding includes slot conductor groups each having a plurality of slot conductors; the plurality of slot conductors in each slot conductor group are inserted at a predetermined number Ns of successive slots so that the slot conductors in the slot conductor group take successive slot positions and successive layer positions; and the number Ns is set so that Ns=NSPP+NL when NSPP represents a number of slots per phase per pole and a number of layers is expressed as 2×NL.

Abstract: A rotating electrical machine includes: a stator core; a stator winding; and a rotor. Cross conductors connect slot conductors to run astride slots with the slot pitch N+1 at coil ends on one side and run astride slots with the slot pitch N?1 at coil ends on another side, with N representing a number of slots per pole; the stator winding includes slot conductor groups each having a plurality of slot conductors; the plurality of slot conductors in each slot conductor group are inserted at a predetermined number Ns of successive slots so that the slot conductors in the slot conductor group take successive slot positions and successive layer positions; and the number Ns is set so that Ns=NSPP+NL when NSPP represents a number of slots per phase per pole and a number of layers is expressed as 2×NL.

Abstract: A rotor comprising: a rotating shaft with at least one keyway formed at an outer circumferential surface thereof and ranging along an axial direction; and a rotor core that includes a key that projects out on an inner circumferential side thereof, and is fitted in the keyway; wherein: a recessed portion that widens outward along a radial direction is formed at each of two sides of the key facing opposite each other along a circumferential direction at the rotor core; a planar portion is formed at a bottom area of the recessed portion so as to lessen stress occurring on each of the two sides of the key facing opposite each other along the circumferential direction; the planar portion is a straight contoured portion extending over a predetermined length along a direction perpendicular to a direction in which the key projects out, and a connecting side surface extending to an inner circumference of the rotor core is formed continuously to an end of the straight contoured portion located on a side opposite from a

Abstract: A rotating electrical machine includes: a stator that includes a stator core and a stator coil; a rotor that rotates with respect to the stator; a refrigerant supply port through which a cooling medium is supplied to a coil end protruding from the stator core; and a guide member, disposed along at least a part of the coil end, for causing the cooling medium supplied through the refrigerant supply port to flow along the coil end.

Abstract: An electric rotating machine is provided that can ensure insulation quality between a coil end and an inside wall of a housing or of a case. The electric rotating machine includes a stator including a stator core and a stator winding. The stator core has a plurality of slots rowed in a circumferential direction. The stator winding is formed of a conductor rectangular in a cross section and is inserted into the slots, the conductor being provided with an insulating coated layer. The stator winding has a first segment transition bent section provided on a radially outside of the stator and a second segment transition bent section provided on a radially inside of the stator. The first segment transition bent section has a layer-transition bent section angle greater than a layer-transition bent section angle of the second segment transition bent section.

Abstract: A rotating electric machine includes: a stator core having a plurality of slots aligned along a circumferential direction; a stator having a stator coil with an enamel coating inserted into the slots of the stator core; and a rotor rotatably arranged over the stator core through a given gap. The stator coil includes: main coils of a plurality of phases in which a plurality of segment coils each having a rectangular cross-section wire formed into a substantially U-shaped wire in advance is connected to each other; a first sub-coil having a lead wire led from the slots and attached with an AC terminal, and connected to one end of the respective main coils; and a second sub-coil having a neutral wire led from the slots, and connected to the other end of the respective main coils. The lead wire and the neutral wire are each formed of a wire with a bend structure having a plurality of straights and bends.

Abstract: A rotating electric machine includes a stator and a rotor. Each of magnetic poles of the rotor includes a magnet insertion hole, a permanent magnet that is inserted in the magnet insertion hole, and a nonmagnetic portion formed between the permanent magnet and an auxiliary salient pole. A portion of the rotor core located toward the stator relative to the nonmagnetic portion function as a bridge portion connecting a magnetic pole peace with the auxiliary salient pole. A side of the nonmagnetic portion located toward the stator includes a first side at the bridge portion, extending along a virtual circular arc passing through the permanent magnet insertion hole closest to the stator, and a side of the nonmagnetic portion located toward the auxiliary salient pole includes a second side extending away from the stator, with the first side and the second side connected through a curved line.

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 stator for a rotating electrical machine includes a stator core including a plurality of slots arrayed in a circumferential direction and a stator winding formed of a conductor having a rectangular cross section and an insulation coating. The stator winding is configured to be inserted in the slot. The stator winding includes a first, a second, and a third phase windings constituted by connecting a plurality of segment coils formed in an approximate U-shape. The stator winding also includes a first neutral wire formed of a single continuous conductor extending across a first slot and a second slot, and configured to connect the first phase winding and the second phase winding. The stator winding further includes a second neutral wire pulled out from a third slot and configured to connect the third phase winding and the first neutral wire.

Abstract: A rotating electrical machine includes a stator with an iron core having a plurality of slots and a stator winding configured by connecting a plurality of segment conductors each formed by a rectangular wire including an end portion and an insulating film; and a rotator that faces the stator through a gap, wherein the conductor includes a portion coated with the insulating film and a peel-off portion from which the insulating film is peeled off and has a cross-section smaller than the coated portion, the segment conductor and another segment conductor are bonded to each other outside the slots so as to bring at least parts of the peel-off portions as bonding faces into contact with each other, at least one segment conductor of the bonded segment conductors includes a straight portion that is formed in a linear shape in an axial direction and an arc portion.

Abstract: A rotating electrical machine includes: a stator core; a stator winding; and a rotor. Cross conductors connect slot conductors to run astride slots with the slot pitch N+1 at coil ends on one side and run astride slots with the slot pitch N?1 at coil ends on another side, with N representing a number of slots per pole; the stator winding includes slot conductor groups each having a plurality of slot conductors; the plurality of slot conductors in each slot conductor group are inserted at a predetermined number Ns of successive slots so that the slot conductors in the slot conductor group take successive slot positions and successive layer positions; and the number Ns is set so that Ns=NSPP+NL when NSPP represents a number of slots per phase per pole and a number of layers is expressed as 2×NL.

Abstract: A rotor comprising: a rotating shaft with at least one keyway formed at an outer circumferential surface thereof and ranging along an axial direction; and a rotor core that includes a key that projects out on an inner circumferential side thereof, and is fitted in the keyway; wherein: a recessed portion that widens outward along a radial direction is formed at each of two sides of the key facing opposite each other along a circumferential direction at the rotor core; a planar portion is formed at a bottom area of the recessed portion so as to lessen stress occurring on each of the two sides of the key facing opposite each other along the circumferential direction; the planar portion is a straight contoured portion extending over a predetermined length along a direction perpendicular to a direction in which the key projects out, and a connecting side surface extending to an inner circumference of the rotor core is formed continuously to an end of the straight contoured portion located on a side opposite from a