Abstract: A stator includes a stator core and a coil wound around the stator core. The coil includes a basic coil segment including a pair of first legs and a first transition portion disposed on a first end surface side of the stator core, and a transition coil segment including a pair of second legs and a second transition portion. The second transition portion includes a pair of shoulders and a pair of second rising portions. An inclination angle of the second rising portion is larger than an angle of the shoulder with respect to a first end surface, so that the second transition portion is in contact with the first transition portion.

Abstract: A stator includes a stator core including a plurality of teeth and a plurality of slots, a coil wound around the plurality of slots, and a spacer disposed on an end portion in an axial direction of the stator core. The coil includes a plurality of coil segments, each including a bent portion and a pair of legs. The spacer includes a coil support portion that is disposed between an end portion of each of the teeth and the bent portion of the coil segment and that has a support surface. A distance from the end portion of each of the teeth to the support surface on an inner side in a radial direction of the stator core is longer than a distance from the end portion of each of the teeth to the support surface on an outer side in the radial direction of the stator core.

Abstract: A coil includes a first coil piece, and a second coil piece coupled to the first coil piece. Each of the first coil piece and the second coil piece has a center portion arranged in a slot of a stator core, and an end portion protruding in an axial direction from the stator core. In the coil end portion, the end portion of the first coil piece and at least a part of the end portion of the second coil piece are arranged in the axial direction.

Abstract: An electric motor includes a rotor, a stator, and an electric motor casing. The electric motor casing forms a first accommodating space accommodating a rotary shaft and a rotor core and a stator, and has an inner peripheral surface including an abutting inner peripheral surface in contact with a top portion on the radially outer side of a core convex portion. An outer peripheral-side flow path through which a cooling medium is capable of flowing is formed between the core convex portions adjacent to each other in the peripheral direction. The outer peripheral-side flow path is defined by an outer peripheral surface of the core main body and the inner peripheral surface of the electric motor casing.

Abstract: A motor includes a stator core, a coil disposed in slots of the stator core, and a rotor facing the stator core. When the number of poles of the rotor is P, the number of the slots of the stator core is S, and a natural number is N, conditions of P=7×N and S=12×N are satisfied.

Abstract: A coil includes a center portion arranged in a slot of a stator core, and an end portion protruding in an axial direction from the stator core. The end portion has a first portion, and a second portion thinner than the thickness of the first portion.

Abstract: The basic coil segment is arranged in the slot such that at least part of the basic coil bent portion is arranged outside the insertion end, in an axial direction parallel to a center axis of the stator core and the pair of the basic coil insertion end portions is arranged outside the welded end, in the axial direction. The power coil segment is arranged in the slot such that the power coil lead end portion and at least part of the power coil connection portion are arranged outside the insertion end, in the axial direction and the power coil insertion end portion is arranged outside the welded end, in the axial direction. The height of an end surface of the basic coil segment from the insertion end is equal to the height of an end surface of the power coil segment from the insertion end.

Abstract: A stator includes a stator core (6); and a coil wound around the stator core. The coil includes a basic coil segment (22) including a pair of first legs (31) and a first transition portion (32) disposed on a first end surface (14) side of the stator core, and a transition coil segment (23) including a pair of second legs (41) and a second transition portion (42). The second transition portion includes a pair of shoulders (43) and a pair of second rising portions (44). An inclination angle of the second rising portion is larger than an angle of the shoulder with respect to a first end surface, so that the second transition portion is in contact with the first transition portion.

Abstract: A stator includes a stator core (6) including a plurality of teeth (11) and a plurality of slots (12); a coil wound around the plurality of slots; and a spacer (8) disposed on an end portion (14) in an axial direction of the stator core. The coil includes a plurality of coil segments (22), each including a bent portion (31) and a pair of legs (32). The spacer includes a coil support portion (41) that is disposed between an end portion of each of the teeth and the bent portion of the coil segment and that has a support surface (42). A distance from the end portion of each of the teeth to the support surface on an inner side in a radial direction of the stator core is longer than a distance from the end portion of each of the teeth to the support surface on an outer side in the radial direction of the stator core.

Abstract: An electric motor includes a rotor having a rotary shaft rotating around a vertically extending axis and a rotor core fixed to an outer peripheral surface of the rotary shaft, a stator surrounding the rotor core from an outer peripheral side, a lower bottom portion as a partition wall partitioning a first space where the rotor and the stator are disposed and a lubricating oil is supplied from an outside, a storage portion configured to store the lubricating oil supplied into the first space, a brake mechanism as a drive unit discharging the lubricating oil inside the storage portion into the first space, and sliding portions into each of which the lubricating oil discharged from the inside of the storage portion is introduced.

Abstract: A rotary drive system includes an electric motor, a speed reducer, and a lubricating oil-circulating unit. The electric motor has an electric motor casing forming a first accommodating space and a communication hole communicating downward. The speed reducer has a speed reducer casing forming a second accommodating space communicating with the first accommodating space through the communication hole. The lubricating oil-circulating unit has a lubricating oil flow path and a lubricating oil pump. The lubricating oil flow path connects the first accommodating space and the second accommodating space at the outside. The lubricating oil pump pumps lubricating oil from the second accommodating space side to the first accommodating space side.

Abstract: An electric motor includes a rotor, a stator, and an electric motor casing. The electric motor casing forms a first accommodating space accommodating a rotary shaft and a rotor core and a stator, and has an inner peripheral surface including an abutting inner peripheral surface in contact with a top portion on the radially outer side of a core convex portion. An outer peripheral-side flow path through which a cooling medium is capable of flowing is formed between the core convex portions adjacent to each other in the peripheral direction. The outer peripheral-side flow path is defined by an outer peripheral surface of the core main body and the inner peripheral surface of the electric motor casing.

Abstract: A speed reducer includes a transmission unit rotating around an axis, an annular member having a cylindrical shape surrounding the axis, rotating around the axis together with the transmission unit, and having an oil sump having a recessed groove recessed in an inner peripheral surface and a lubricating oil supply hole extending and opening radially outward from the recessed groove, and a sliding portion provided radially outward of the lubricating oil supply hole of the annular member.

Abstract: A rotary electric machine includes a rotor that rotates around a rotation axis serving as a center and has a plurality of salient poles protruding in directions perpendicular to the rotation axis, and a stator that includes an annular structural body disposed radially outside the rotor and surrounding the rotor, and 6×n windings provided along a circumferential direction of the structural body, a field signal for generating field magnetic flux and a drive signal for driving the rotor as a three-phase rotary electric machine being superimposed on each other to be input to each of the windings. n is a natural number equal to or larger than one.

Abstract: A motor includes: an annular stator attached in a housing; a rotor that is disposed in the stator and is rotatably supported by the housing; and a plurality of permanent magnets embedded in a rotor core of the rotor, in which the rotor core has embedding holes respectively in which the permanent magnets are fitted, and each of the embedding holes is formed with filling holes each continuous in an axial direction of the rotor core at diagonal positions of each of the permanent magnets.

Abstract: A motor cooling structure for cooling a motor, which includes a shaft transmitting power and a rotor core attached to an outside of the shaft, by a cooling medium, includes: a cooling medium supply passage that extends to an inside of the shaft in an axial direction of the shaft and passes the cooling medium through the cooling medium supply passage; and a plurality of cooling medium passages that are branched from the cooling medium supply passage to cool the rotor core while flowing the cooling medium without branching the cooling medium in the axial direction and then eject the cooling medium from a plurality of ejection holes opened to a surface of the rotor core, wherein distances from a cooling medium inlet, through which the cooling medium flows into the cooling medium supply passage, to the respective ejection holes are equal between the plurality of cooling medium passages.

Abstract: A rotary electric machine includes a rotor that rotates around a rotation axis serving as a center and has a plurality of salient poles protruding in directions perpendicular to the rotation axis, and a stator that includes an annular structural body disposed radially outside the rotor and surrounding the rotor, and 6×n windings provided along a circumferential direction of the structural body, a field signal for generating field magnetic flux and a drive signal for driving the rotor as a three-phase rotary electric machine being superimposed on each other to be input to each of the windings. n is a natural number equal to or larger than one.

Abstract: An electrical motor that includes a circular stator attached to an inner side of a housing and a rotor disposed at an inner side of the stator in a radial direction, the electrical motor includes: a terminal connected to a power supply cable drawn from a coil of the stator; a terminal box that is attached to the housing and stores the terminal; and an insulating material that is disposed between the terminal box and the terminal and separable from the terminal.

Abstract: A rotary electric machine includes: a ring-shaped stator; a rotor disposed to an inside of the stator in a rotatable manner; a plurality of stator teeth provided to the stator equally spaced with each other in a circumferential direction, the stator teeth projecting toward the rotor and each provided with a coil wound therearound; and a plurality of rotor teeth provided to the rotor equally spaced with each other in a circumferential direction, the rotor teeth projecting toward the stator. The rotor teeth each include a convex teeth body and extending portions extending from both sides of an end of the teeth body in the circumferential direction, and a constricted portion with a circumferential minimum width smaller than a circumferential width of an end of each of the stator teeth is provided to an intermediate portion in a projecting direction of each of the rotor teeth.

Abstract: A motor includes: an annular stator attached in a housing; a rotor that is disposed in the stator and is rotatably supported by the housing; and a plurality of permanent magnets embedded in a rotor core of the rotor, in which the rotor core has embedding holes respectively in which the permanent magnets are fitted, and each of the embedding holes is formed with filling holes each continuous in an axial direction of the rotor core at diagonal positions of each of the permanent magnets.