Abstract: A rotor used for a motor includes a rotor core, and a plurality of permanent magnets embedded in a corresponding plurality of embedding holes in the rotor core configured to include flux barriers at both ends of the plurality of embedding holes in the rotor core and to include a plurality of magnetic poles. The rotor core includes a plurality of grooves on an outer peripheral surface, the plurality of grooves, with the two paired grooves, are away from an axis that becomes the q-axis when the motor is operated, and are arranged symmetrically about the axis, and the rotor core has such a cross-section that a first angle between two lines passing through the two grooves and the center of the rotor core is smaller than a second angle between the axis-side end face of the two flux barriers adjacent to each other across the axis.

Abstract: A laminated core of this rotor core includes one side magnet hole provided on one side in a circumferential direction with respect to a d-axis, an other side magnet hole provided on the other side, an intermediate magnet hole, a first outer bridge portion, a second outer bridge portion, a first inner bridge portion, and a second inner bridge portion.

Abstract: A rotor includes a rotor core formed by stacking electromagnetic steel sheets having anisotropy, which means that magnetic characteristics of the electromagnetic steel sheets in a first direction along a rolling direction are different from magnetic characteristics of the electromagnetic steel sheets in a second direction obtained by rotating the first direction by 90°, the rotor core having 4n magnetic pole portions formed along a circumferential direction, and magnets mounted in the rotor core in each of the magnetic pole portions. The 4n magnetic pole portions include a first magnetic pole portion formed in a region including the first direction and a second magnetic pole portion formed in a region including the second direction, and a total magnetic flux amount of the magnets per pole of the second magnetic pole portion is larger than a total magnetic flux amount of the magnets per pole of the first magnetic pole portion.

Abstract: A control apparatus includes: a rotor temperature estimation unit estimating a temperature of a rotor based on stator temperature information from a first temperature sensor for identifying a temperature of a stator, refrigerant temperature information from a second temperature sensor for identifying a temperature of refrigerant used to cool an electric motor, and rotation speed information about the rotor from a resolver for identifying a rotation speed of the rotor; and an electric motor control unit controlling at least one of an output characteristic and a drive condition of the electric motor based on the temperature of the rotor estimated by the rotor temperature estimation unit.

Abstract: A rotor includes a rotor core in which magnet mounting holes, which are provided in layers along a radial direction and are arranged symmetrically in a circumferential direction about a d-axis, are formed, and magnets disposed in the magnet mounting holes, wherein the rotor core includes a first bridge portion provided between first magnet mounting holes adjacent to each other across the d-axis, a second bridge portion provided between second magnet mounting holes located further inward than the first magnet mounting holes in the radial direction and adjacent to each other across the d-axis, and third and fourth bridge portions provided between an outer peripheral surface of the rotor core and the first and second magnet mounting holes, respectively, and when smallest widths of the first to fourth bridge portion are L1, L2, L3, and L4, respectively, a relationship of L3<L1<L4<L2 is satisfied.

Abstract: A rotor includes a rotor core in which first and second magnet mounting holes, which are located outward and inward in a radial direction, respectively, are provided symmetrically in a circumferential direction about a d-axis, and a magnet provided in each of the first and second magnet mounting holes. The first and second magnet mounting holes satisfy a positional relationship defined by 1.0 < L1/L2 ? 1.7, where L1 represents a largest distance between a first magnet, which is disposed closest to the d-axis in the second magnet mounting hole, and a second magnet, which is mounted in the first magnet mounting hole, along a magnetization easy direction, and L2 represents a shortest distance between the first and second magnet mounting holes in a region located closer to the q-axis than a d-axis-side end of a third magnet disposed closest to the q-axis in the second magnet mounting hole.

Abstract: A rotor of a rotating machine includes a rotor core in which a plurality of assembly holes is provided in an axial direction, and a first magnet and a second magnet. The first magnet and the second magnet are assembled to the rotor core by being inserted into the assembly holes in accordance with a predetermined arrangement pattern. An outer peripheral surface of any one of the first magnet and the second magnet, including end faces in the axial direction, being entirely covered with an insulating coating, and an outer peripheral surface of the other of the first magnet and the second magnet, excluding at least a part of end faces in the axial direction, being covered with an insulating coating.

Abstract: A control apparatus includes: a rotor temperature estimation unit estimating a temperature of a rotor based on stator temperature information from a first temperature sensor for identifying a temperature of a stator, refrigerant temperature information from a second temperature sensor for identifying a temperature of refrigerant used to cool an electric motor, and rotation speed information about the rotor from a resolver for identifying a rotation speed of the rotor; and an electric motor control unit controlling at least one of an output characteristic and a drive condition of the electric motor based on the temperature of the rotor estimated by the rotor temperature estimation unit.

Abstract: A rotor for a rotating electric machine includes a rotor core provided with a pair of first magnets and a pair of second magnets that are located closer than the first magnets to an outer peripheral side of the rotor core. The rotor core includes a caulking portion disposed in a region between first and second imaginary lines in a radial direction of the rotor core. The first imaginary line is an arc passing through outer-peripheral-side end portions of respective long sides of rectangular-shaped cross sections of the first magnets. The second imaginary line is an arc passing through inner-peripheral-side end portions of respective long sides of rectangular-shaped cross sections of the second magnets. The arc of each of the first and second imaginary lines has a center of curvature that lies at an intersection of extensions of the long sides of the rectangular-shaped cross sections of the second magnets.

Abstract: A rotor to be provided in a rotating electric machine. The rotor includes a rotor core provided with a pair of flux barriers and a void portion. A pair of magnets are provided in the pair of flux barriers. Each of the pair of magnets has a rectangular shape in its cross section. The void portion is located on an inner peripheral side than an imaginary line connecting between inner-peripheral-side corners of the pair of magnets. A first width is defined by a shortest distance between the pair of flux barriers. A second width is defined by a distance from the void portion to an intersection point at which the imaginary line intersects with a shortest line segment whose length corresponds to a shortest distance between one of the pair of magnets and the void portion. The second width is smaller than the first width.

Abstract: A rotor of a rotating machine includes a rotor core in which a plurality of assembly holes is provided in an axial direction, and a first magnet and a second magnet. The first magnet and the second magnet are assembled to the rotor core by being inserted into the assembly holes in accordance with a predetermined arrangement pattern. An outer peripheral surface of any one of the first magnet and the second magnet, including end faces in the axial direction, being entirely covered with an insulating coating, and an outer peripheral surface of the other of the first magnet and the second magnet, excluding at least a part of end faces in the axial direction, being covered with an insulating coating.

Abstract: A rotor of a rotary electric machine, which is supported by a rotating shaft, includes a rotor core, and a permanent magnet embedded in the rotor core. At least one in-core cooling medium passage that leads a cooling medium supplied from an in-shaft cooling medium passage formed inside the rotating shaft to an outer peripheral end of the rotor core, and discharges the supplied cooling medium into a gap between the rotor core and a stator, is formed in the rotor core. The at least one in-core cooling medium passage includes a center cooling medium passage, a pair of inner peripheral side cooling medium passages, and an outer peripheral side cooling medium passage that is communicated with the gap. A radially outside end portion of the center cooling medium passage has a slope that extends toward a radially outer side closer to a center in the axial direction.

Abstract: A rotor core includes at least one core refrigerant passage configured to release a refrigerant to a gap between the rotor core and a stator. The core refrigerant passage includes: a central refrigerant passage provided radially inside a permanent magnet so as to extend in an axial direction, the central refrigerant passage being opened on axial end surfaces of the rotor core; an inner refrigerant passage communicating the shaft refrigerant passage with the central refrigerant passage; an outer refrigerant passage communicating the central refrigerant passage with the gap; and dams provided on both axial-end sides of the central refrigerant passage relative to the outer refrigerant passage so as to project toward a radially inner side from a radially outer side in the central refrigerant passage.

Abstract: An electric powered vehicle includes: a motor; an inverter configured to convert electric power from a battery to drive the motor; a transmission configured to shift the rotation output of the motor at a variable transmission gear ratio; and a controller configured to control the inverter to control the driving of the motor and to control a change in the shift gear stage, and to perform high surge region avoidance control for changing the gear ratio of the transmission to change a motor rotation speed while maintaining a vehicle speed and changing an operation point outside a high surge region, when the operation point of the motor enters the high surge region where the inverter is controlled by a PWM overmodulation control system, and the high surge region is defined to be equal to or higher than a predetermined rotation speed and equal to or less than predetermined torque.

Abstract: A stator for a rotary electric machine includes an annular yoke, and teeth projecting from the yoke in a stator radial direction. Both ends of each of the teeth in a stator axial direction include reduced-width parts. The width of each of the reduced-width parts is smaller than the width of the remaining part of each of the teeth. Stator coils each is wound around each of the teeth in concentrated winding, and includes at least one curved portion in a coil end portion. The curved portion corresponds in position to at least part of the reduced-width parts.

Abstract: A hybrid vehicle includes an engine, a motor configured to output power for traveling, a drive wheel coupled to the engine and the motor, a transmission provided i) between the engine and the motor and ii) between the engine and the drive wheel, the transmission being configured to shift gears in a plurality of stages or continuously, a refrigerant supply device including a pump and a refrigerant pressure regulation device, the refrigerant supply device being configured to supply a refrigerant to the motor, and the refrigerant supply device being configured to supply the refrigerant to the transmission as a hydraulic fluid, and at least one electronic control unit configured to control the refrigerant supply device based on a load situation of the motor by controlling a refrigerant supply pressure to the motor.

Abstract: A rotor core includes at least one core refrigerant passage configured to release a refrigerant to a gap between the rotor core and a stator. The core refrigerant passage includes: a central refrigerant passage provided radially inside a permanent magnet so as to extend in an axial direction, the central refrigerant passage being opened on axial end surfaces of the rotor core; an inner refrigerant passage communicating the shaft refrigerant passage with the central refrigerant passage; an outer refrigerant passage communicating the central refrigerant passage with the gap; and dams provided on both axial-end sides of the central refrigerant passage relative to the outer refrigerant passage so as to project toward a radially inner side from a radially outer side in the central refrigerant passage.

Abstract: A rotor of a rotary electric machine, which is supported by a rotating shaft, includes a rotor core, and a permanent magnet embedded in the rotor core. At least one in-core cooling medium passage that leads a cooling medium supplied from an in-shaft cooling medium passage formed inside the rotating shaft to an outer peripheral end of the rotor core, and discharges the supplied cooling medium into a gap between the rotor core and a stator, is formed in the rotor core. The at least one in-core cooling medium passage includes a center cooling medium passage, a pair of inner peripheral side cooling medium passages, and an outer peripheral side cooling medium passage that is communicated with the gap. A radially outside end portion of the center cooling medium passage has a slope that extends toward a radially outer side closer to a center in the axial direction.

Abstract: A motor control apparatus controls a motor system including a motor and an inverter that outputs electric power to the motor. The motor control apparatus includes an electronic control unit. The electronic control unit is configured to set a q-axis current value in response to a torque command value, and execute system loss reduction control for controlling a d-axis current value such that system loss, which is the sum of a copper loss, an iron loss and an inverter loss, is smaller than system loss at a time when motor loss, which is the sum of the copper loss and the iron loss, is a minimum. The copper loss, the iron loss and the inverter loss change as a current phase of a current vector changes in a q-d plane.

Abstract: A hybrid vehicle includes an engine, a motor configured to output power for traveling, a drive wheel coupled to the engine and the motor, a transmission provided i) between the engine and the motor and ii) between the engine and the drive wheel, the transmission being configured to shift gears in a plurality of stages or continuously, a refrigerant supply device including a pump and a refrigerant pressure regulation device, the refrigerant supply device being configured to supply a refrigerant to the motor, and the refrigerant supply device being configured to supply the refrigerant to the transmission as a hydraulic fluid, and at least one electronic control unit configured to control the refrigerant supply device based on a load situation of the motor by controlling a refrigerant supply pressure to the motor.