Abstract: An electromagnetic actuator (1) includes sensor magnets (21a, 21b) disposed correspondingly to plungers (11a, 11b), respectively. The electromagnetic actuator (1) further includes a sensor core (22) made of a magnetic material and disposed in a position through which magnetic fluxes from the plurality of sensor magnets (21a, 21b) can flow, and a magnetic sensor (23) that is disposed in a part of the sensor core (22) through which the magnetic fluxes of the plurality of sensor magnets (21a, 21b) can flow in common, and that detects the magnetic flux, which varies in accordance with respective positions of the plurality of plungers (11a, 11b).

Abstract: In a mechanically and electrically integrated driving apparatus, a common coolant flow channel for cooling a motor unit and an inverter unit is disposed inside a wall portion of a frame unit. Power modules are placed in close contact with an inner wall surface of the frame unit. A bracket that is separate from the frame unit is fitted into the frame unit. A space inside the frame unit is divided by the bracket into: a space in which the motor unit is housed; and a space in which the inverter unit is housed.

Abstract: A pole-number-changing rotary electric machine includes: a rotary electric machine; an n-group inverter; and a control unit for controlling the n-group inverter, wherein the control unit controls current phases of a current flowing through stator coils such that a current phase degree of freedom, which is a number of current phases per pole pair controllable by the n-group inverter, is equal to a number of groups n×a number of phases m/2 at a time of high polarity driving and the number of groups n×the number of phases m at a time of low polarity driving, where the number of groups n is a multiple of 4 and the number of phases m is a natural number of 3 or more and relatively prime to the number of groups n.

Abstract: Magnets are disposed between adjacent first claw portions and second claw portions so as to protrude toward a second end in an axial direction from tips of the first claw portions and so as to protrude toward a first end in the axial direction from tips of the second claw portions, magnet holding members include a base portion that covers a radially outer surface of the magnets, and the base portion includes a high magnetic resistance portion that is disposed in a direction that is perpendicular to a direction from the first claw portions toward the second claw portions and parallel to the radially outer surface of the magnets so as to cross a magnetic path from the first claw portions toward the second claw portions in a region between the adjacent first claw portions and second claw portions.

Abstract: A motor rotor structure for an electric turbo charger is manufactured at low cost with good quality by fixedly fitting, over a shaft, a rotor core having electromagnetic steel sheets pre-formed as an integrated stack. The rotor structure includes a rotor core which is rotated by a magnetic field formed by a stator in a housing; a shaft configured to rotate a compressor impeller and the rotor core together; and a bearing supporting the shaft. The rotor includes the rotor core including the electromagnetic steel sheets; a stopper portion formed at an intermediate portion of the shaft to restrict axial movement of the rotor core; and a pressing unit which presses the rotor core fitted over the shaft against the stopper portion. The pressing unit prevents a circumferential phase shift between the shaft and the rotor core by a pressing force thereof.

Abstract: A rotary electric machine includes a stator core, a stator coil, and a cooling portion. The stator core includes yoke portions and a plurality of tooth portions, and surrounds an outer periphery of a rotor. Each of the tooth portions has a distal end portion protruding radially inward from an inner peripheral surface of each of the yoke portions toward a center axis of the rotor. The stator coil includes a plurality of phase coil portions formed by winding a conductive wire around the stator core. The cooling portion is provided so as to be isolated from the stator core, and is configured to cool the stator coil in contact with the stator coil.

Abstract: An axial gap rotating electrical machine, including: a rotor; a stator which includes a stator iron core, the stator iron core including: a core back having a hollow-disc shape; and a plurality of teeth, which axially extend from one axial surface of the core back, and are arrayed circumferentially, the plurality of teeth having distal ends axially facing the rotor; a housing having a bottom on which another axial surface of the core back, which is a surface axially opposite to the one axial surface of the core back, is superposed; and a fixing member, which is fixed to the bottom at a position radially shifted from the core back, and is configured to press the one axial surface of the core back toward the bottom.

Abstract: An electromagnetic actuator (1) includes sensor magnets (21a, 21b) disposed correspondingly to plungers (11a, 11b), respectively. The electromagnetic actuator (1) further includes a sensor core (22) made of a magnetic material and disposed in a position through which magnetic fluxes from the plurality of sensor magnets (21a, 21b) can flow, and a magnetic sensor (23) that is disposed in a part of the sensor core (22) through which the magnetic fluxes of the plurality of sensor magnets (21a, 21b) can flow in common, and that detects the magnetic flux, which varies in accordance with respective positions of the plurality of plungers (11a, 11b).

Abstract: A motor according to the present invention includes: a stator core that surrounds an outer circumference of a rotor, and that includes: a yoke portion; and a plurality of tooth portions in which tip portions protrude radially inward toward a central axis of the rotor from an inner circumferential surface of the yoke portion; a heat sink that is disposed so as to face a first end surface of the stator core in an axial direction of the stator core; a stator coil that includes phase coil portions that are configured using conducting wires that are mounted to the stator core; and a coil fixing member that is disposed on coil end portions of the phase coil portions, that fixes the coil end portions in a state of surface contact with the heatsink.

Abstract: In a mechanically and electrically integrated rotary electric machine, a motor portion and an inverter portion are inserted inside a cylindrical frame. The motor portion has a plurality of coils. The inverter portion has a plurality of switching elements. The coils and the switching elements are electrically connected by a connector. The connector has: an end portion connector that distributes sinusoidal electric currents from the switching elements to the respective coils; and a plurality of axial connectors that direct the sinusoidal electric currents from the switching elements to the end portion connector. The end portion connector is disposed on an end portion of the motor portion near an output shaft. The axial connectors are disposed parallel to an axial direction of the frame so as to pass from the switching elements through a mounted region of the motor portion.

Abstract: One end of each of phase conductors wound around a stator core in a wave winding arrangement is connected to a positive electrode terminal of a DC power supply through a first positive electrode side switch and is connected to a negative electrode terminal of the DC power supply through a second negative electrode side switch. The other end of the phase conductor is connected to the negative electrode terminal of the DC power supply through a first negative electrode side switch and is connected to the positive electrode terminal of the DC power supply through a second positive electrode side switch. The first positive electrode side switch, the second negative electrode side switch, the first negative electrode side switch, and the second positive electrode side switch are controlled by a controller, whereby amplitude and phase of current passing through each of the phase conductors are individually controlled.

Abstract: A first stator core and a second stator ore are configured by arranging core block pairs into an annular shape, the core block pairs being configured by stacking together core blocks so as to be spaced apart axially, each of the core blocks including a core back portion and one tooth, and a permanent magnet is configured so as to be divided into a plurality of magnet blocks that each include: a base portion; one shaft portion that protrudes radially inward from an inner circumferential surface of the base portion; and flange portions that protrude on two circumferential sides from a radially inner end portion of the shaft portion, the magnet blocks being held between the core block pairs such that the base portion and the shaft portion are positioned inside the core block pairs and such that the flange portions protrude circumferentially from the core block pairs.

Abstract: The magnetic resistance of a magnetic path that passes through a coil (6) is increased by magnetically dividing a stator core into a plurality of divided cores (4, 5) in such a manner that the magnetic flux of a permanent magnet (7) flows through the magnetic path when a projection (82) of a plunger (8) magnetically connects the divided cores (4, 5), hence the magnetic resistance of the magnetic path that passes through the coil (6) rapidly changes due to a positional relationship between a gap between the divided cores (4, 5) and the plunger (8), and the magnetic flux that flows through the magnetic path rapidly changes, and moreover a large back electromotive force is produced.

Abstract: A pole-number-changing rotary electric machine includes: a rotary electric machine; an n-group inverter; and a control unit for controlling the n-group inverter, wherein the control unit controls current phases of a current flowing through stator coils such that a current phase degree of freedom, which is a number of current phases per pole pair controllable by the n-group inverter, is equal to a number of groups n×a number of phases m/2 at a time of high polarity driving and the number of groups n×the number of phases m at a time of low polarity driving, where the number of groups n is a multiple of 4 and the number of phases m is a natural number of 3 or more and relatively prime to the number of groups n.

Abstract: A squirrel-cage rotor manufacturing method capable of suppressing, at the time of performing die-casting, formation of gaps between closing portions and a rotor core at radially outer parts of rotor slots, or generation of a thermal stress in the rotor core as a result of expansion of the closing portions. The squirrel-cage rotor manufacturing method includes: arranging, through die-casting, conductors into rotor slots that are formed along a radially outer part of a rotor core; and performing the die-casting under a state in which radially outer parts of the rotor slots are closed with closing portions made of the same material as a material of the rotor core.

Abstract: In a rotary electric machine, first inclined surfaces that intersect a plane that includes a central axis of a shaft at a predetermined angle are disposed radially outside gaps between coil ends of circumferentially adjacent concentrated winding coils, and cooling air that is blown out from a cooling fan and has flowed radially outward through the gaps between the coil ends is converted into an axially outward flow by the first inclined surfaces.

Abstract: A tooth of a stator has a tapered shape in which a tooth width decreases toward a distal end portion thereof. A winding is formed of an edgewise winding wound around the tooth in a row. The winding is supplied with power so that a terminal on a base portion side of the tooth may have a higher voltage than that of a terminal on the distal end portion side thereof. A tooth width Th of the base portion is set within the range of Tmin<Th<1.25Tha defined by a tooth width Tha that maximizes an index using an outer radius and a core back width of a stator core, a clearance of the windings in the slot, a winding width, an air gap between the teeth and the winding, a pitch of the slot, and an inclination angle of the winding, and a permissible lower limit Tmin.

Abstract: In a mechanically and electrically integrated rotary electric machine, a motor portion and an inverter portion are inserted inside a cylindrical frame. The motor portion has a plurality of coils. The inverter portion has a plurality of switching elements. The coils and the switching elements are electrically connected by a connector. The connector has: an end portion connector that distributes sinusoidal electric currents from the switching elements to the respective coils; and a plurality of axial connectors that direct the sinusoidal electric currents from the switching elements to the end portion connector. The end portion connector is disposed on an end portion of the motor portion near an output shaft. The axial connectors are disposed parallel to an axial direction of the frame so as to pass from the switching elements through a mounted region of the motor portion.

Abstract: In a mechanically and electrically integrated driving apparatus, a common coolant flow channel for cooling a motor unit and an inverter unit is disposed inside a wall portion of a frame unit. Power modules are placed in close contact with an inner wall surface of the frame unit. A bracket that is separate from the frame unit is fitted into the frame unit. A space inside the frame unit is divided by the bracket into: a space in which the motor unit is housed; and a space in which the inverter unit is housed.

Abstract: A first stator core and a second stator ore are configured by arranging core block pairs into an annular shape, the core block pairs being configured by stacking together core blocks so as to be spaced apart axially, each of the core blocks including a core back portion and one tooth, and a permanent magnet is configured so as to be divided into a plurality of magnet blocks that each include: a base portion; one shaft portion that protrudes radially inward from an inner circumferential surface of the base portion; and flange portions that protrude on two circumferential sides from a radially inner end portion of the shaft portion, the magnet blocks being held between the core block pairs such that the base portion and the shaft portion are positioned inside the core block pairs and such that the flange portions protrude circumferentially from the core block pairs.