Abstract: A motor may include: a stator with a coil; and a rotor radially inside the stator, wherein the rotor includes a rotor shaft, a core supported rotatably with the shaft, and a first end plate attached to a first end of the core, the core including a magnet held in the core, a magnet slot that holds a magnet, and a coolant path extending along an axial direction of the core, the coolant path disposed between a radially-inner end surface of the magnet and the magnet slot, and the first end plate including a flange radially outside the radially-inner end surface of the magnet, the flange protruding toward the core along the axial direction of the core, and the flange being configured to form a cavity between the first end plate and the first end, wherein the cavity delivers the coolant supplied from the rotor shaft to the coolant path.

Abstract: A control device includes an information acquisition unit configured to acquire information related to an air density in a coil and information related to a voltage applied to a rotary electric machine, an insulation determination unit configured to determine whether or not dielectric breakdown occurs in the coil based on the information related to the air density and the information related to the voltage acquired by the information acquisition unit, and configured to determine whether or not an insulation state of the coil is needed to be maintained by supplying an oil to the coil, and a drive instruction unit configured to drive an oil supply unit, when the insulation determination unit determines that dielectric breakdown occurs in the coil and determines that the insulation state of the coil is needed to be maintained by supplying the oil to the coil.

Abstract: A cooling device for an electric motor that includes a stator, a rotor and a shaft fixed in an inner circumferential surface of the rotor. The stator includes a stator core and a stator coil wound on the stator core. The stator coil includes a protruding portion which protrudes from the stator core and which constitutes a coil end. The cooling device includes (a) a refrigerant supply mechanism for supplying a refrigerant from an upper side of the electric motor and (b) a refrigerant guide protruding from a motor casing toward an inner peripheral side of the coil end. The refrigerant supply mechanism is configured to supply the refrigerant to the refrigerant guide. The refrigerant guide extends in a direction of a rotation axis of the electric motor to a position that overlaps with the coil end as seen from a radial direction of the electric motor.

Abstract: The wound field motor includes a shaft having a hollow portion, a rotor core fixed to the shaft, and a rotor coil wound around the rotor core, wherein the rotor core includes a cylindrical back yoke, a plurality of teeth extending radially outward from an outer peripheral surface of the back yoke and wound with the rotor coil, and cooling holes provided in each of the plurality of teeth and extending along the axial direction.

Abstract: A motor includes: a shaft; a rotor fixed to the shaft; a stator having an annular shape about a central axis of the rotor; and a motor case that houses the rotor and the stator. The motor case includes a cooling medium channel and discharge portions in a surface of the motor case that faces the stator in an axial direction of the central axis. The cooling medium channel includes at least a first channel through which a cooling medium flows in a vertical up-down direction. The cooling medium is discharged in the axial direction from the cooling medium channel through the discharge portions toward the inside of the motor case.

Abstract: The disclosure relates to a wound field motor. The wound field motor includes a rotor, a coil wound around the rotor, and an end ring attached to a coil end of the coil and supplied with a cooling medium, and at least one through hole is provided in an axial end face of the end ring.

Abstract: A motor may include: a stator located so that a central axis of the stator intersects with a vertical direction, an annular coolant channel disposed along an end surface of the stator and comprising a ring shape extending around the central axis; and a plurality of individual channels, each of the individual channels being connected to the annular coolant channel, and coolant supplied from the annular coolant channel flowing through the individual channels. The annular coolant channel may include a sectioning structure sectioning the annular coolant channel into an upper channel and a lower channel located below the upper channel. The plurality of individual channels may include a plurality of upper individual channels connected to the upper channel and a plurality of lower individual channels connected to the lower channel.

Abstract: A stator for an electric motor includes: (a) a tubular stator core having slots provided through the stator core in a direction of a rotation axis of the stator core; (b) coils inserted through the slots; (c) a conductive member electrically connected to the coils; (d) a temperature sensor attached to the conductive member; and (e) a resin portion provided to cover at least a part of the conductive member and at least a part of the temperature sensor. The conductive member is provided with a hole that extends in the direction of the rotation axis of the stator core. The temperature sensor is inserted, at least its portion, in the hole.

Abstract: Since the oil pump and the oil cooler are provided in the rear cover and the cooling oil passages for guiding the oil to the respective electric motors MG are integrated in the rear cover, the cooling oil passages do not pass through other case members other than the rear cover. As a consequence, it is possible to shorten the cooling oil passage through which the oil is guided to the respective electric motors MG.

Abstract: A rotor may include: a rotor shaft; a rotor core attached to the rotor shaft and comprising a plurality of magnet slots and magnets, wherein at least one magnet of the magnets has an elongated cross-sectional shape and is fixed by being pressed against a part of an inner surface defining a corresponding one of the magnet slots of the rotor core. The rotor is configured so that coolant flowing through the rotor shaft reaches a surface of a long side of the at least one magnet that is exposed inward in a radial direction of the rotor core in the corresponding magnet slot and moves along an axial direction of the rotor core.

Abstract: A motor may include: a stator with a coil; and a rotor radially inside the stator, wherein the rotor includes a rotor shaft, a core supported rotatably with the shaft, and a first end plate attached to a first end of the core, the core including a magnet held in the core, a magnet slot that holds a magnet, and a coolant path extending along an axial direction of the core, the coolant path disposed between a radially-inner end surface of the magnet and the magnet slot, and the first end plate including a flange radially outside the radially-inner end surface of the magnet, the flange protruding toward the core along the axial direction of the core, and the flange being configured to form a cavity between the first end plate and the first end, wherein the cavity delivers the coolant supplied from the rotor shaft to the coolant path.

Abstract: A control device includes an information acquisition unit configured to acquire information related to an air density in a coil and information related to a voltage applied to a rotary electric machine, an insulation determination unit configured to determine whether or not dielectric breakdown occurs in the coil based on the information related to the air density and the information related to the voltage acquired by the information acquisition unit, and configured to determine whether or not an insulation state of the coil is needed to be maintained by supplying an oil to the coil, and a drive instruction unit configured to drive an oil supply unit, when the insulation determination unit determines that dielectric breakdown occurs in the coil and determines that the insulation state of the coil is needed to be maintained by supplying the oil to the coil.

Abstract: Since the oil pump and the oil cooler are provided in the rear cover and the cooling oil passages for guiding the oil to the respective electric motors MG are integrated in the rear cover, the cooling oil passages do not pass through other case members other than the rear cover. As a consequence, it is possible to shorten the cooling oil passage through which the oil is guided to the respective electric motors MG.

Abstract: A device for estimating an internal temperature of an electric motor. The electric motor has a stator core extending cylindrically in a direction of an axis and around which a coil is wound, a rotor arranged rotatably around the axis, and a case that houses the stator core and the rotor, the coil being cooled by a first cooling liquid in the case. The device estimates the internal temperature by using a thermal circuit that regards a temperature of the first cooling liquid after heat reception from the coil as a first temperature equal to a temperature of the case.

Abstract: A cooling device for an electric motor that includes (i) a stator including a stator core and a stator coil, and (ii) a rotor. The electric motor is located in a position adjacent to a resolver in a direction of the rotation axis. The resolver includes a resolver stator, a resolver rotor and a resolver coil. The cooling device includes (a) a refrigerant supply mechanism and (b) an oil guide which is provided in an annular-shaped cover covering the resolver coil, for supplying a refrigerant supplied from the refrigerant supply mechanism onto a lower portion of a coil end of the stator coil. The oil guide includes a guide wall which extends in the direction of the rotation axis and in a circumferential direction of the annular-shaped cover. At least a portion of the guide wall overlaps with the coil end as seen from a radial direction.

Abstract: A cooling device for an electric motor that includes a stator, a rotor and a shaft fixed in an inner circumferential surface of the rotor. The stator includes a stator core and a stator coil wound on the stator core. The stator coil includes a protruding portion which protrudes from the stator core and which constitutes a coil end. The cooling device includes (a) a refrigerant supply mechanism for supplying a refrigerant from an upper side of the electric motor and (b) a refrigerant guide protruding from a motor casing toward an inner peripheral side of the coil end. The refrigerant supply mechanism is configured to supply the refrigerant to the refrigerant guide. The refrigerant guide extends in a direction of a rotation axis of the electric motor to a position that overlaps with the coil end as seen from a radial direction of the electric motor.

Abstract: A stator for an electric motor includes: (a) a tubular stator core having slots provided through the stator core in a direction of a rotation axis of the stator core; (b) coils inserted through the slots; (c) a conductive member electrically connected to the coils; (d) a temperature sensor attached to the conductive member; and (e) a resin portion provided to cover at least a part of the conductive member and at least a part of the temperature sensor. The conductive member is provided with a hole that extends in the direction of the rotation axis of the stator core. The temperature sensor is inserted, at least its portion, in the hole.

Abstract: Provided is a rotary electric machine including a rotor and a stator. The rotor includes a refrigerant passage. An axial direction of the rotor is along the horizontal direction. The stator is placed around the rotor and includes a tubular stator core. The stator core includes: a communication passage via which an inner peripheral surface of the stator core communicates with an outer peripheral surface of the tubular stator core such that the communication passage guides the refrigerant from the inner peripheral surface of the stator core to the outer peripheral surface of the stator core; and a projection portion provided on the outer peripheral surface of the tubular stator core such that the projection portion extends in the axial direction of the tubular stator core. The projection portion is placed downward in the gravitational direction from an opening of the communication passage on the outer peripheral surface.

Abstract: A rotating electrical machine includes a rotor, a stator core, coils, and insulating sheets. A discharge port that discharges coolant is provided on an outer circumferential face of the rotor. The stator core includes an annular or cylindrical yoke, and teeth disposed on an inner circumferential face of the yoke in a circumferential direction with spaces. The stator core is disposed encompassing an outer circumference of the rotor. A slot-wall-face channel is provided on a wall face of the stator core defining a slot, and configured to open as to the slot for the coolant to flow through. The coils are wound on the teeth. The insulating sheet is disposed in the slot and interposed between the stator core and the coil, and is configured with at least part of the slot-wall-face channel open as to the coil.

Abstract: A rotating electrical machine includes a rotor, a stator core, coils, and insulating sheets. A discharge port that discharges coolant is provided on an outer circumferential face of the rotor. The stator core includes an annular or cylindrical yoke, and teeth disposed on an inner circumferential face of the yoke in a circumferential direction with spaces. The stator core is disposed encompassing an outer circumference of the rotor. A slot-wall-face channel is provided on a wall face of the stator core defining a slot, and configured to open as to the slot for the coolant to flow through. The coils are wound on the teeth. The insulating sheet is disposed in the slot and interposed between the stator core and the coil, and is configured with at least part of the slot-wall-face channel open as to the coil.