Abstract: A stator of a polyphase claw pole motor includes: a compressed-powder member including a compression molded product of magnetic powder; and a metal member. At least claws of the claw pole of the stator are constituted by the compressed-powder member.

Abstract: A polyphase claw pole motor includes: a plurality of claw poles each having a plurality of claws (31) having a pole surface (31a) that faces a rotator (10) and a radial yoke part (32) that extends from the claws (31) toward an outer contour of the claw pole, the claw poles being laminated in an axial direction so as to form an inner peripheral stator part (3); a toroidal coil (4) arranged in a gap between the respective yoke parts (32) of adjacent claw poles (31); and outer peripheral yokes (50) that are circumferentially arranged on an outer side of the inner peripheral stator part (3) so as to form an outer peripheral stator part (5). The claw poles (30) are each formed of a magnetic-molded product formed by compressing magnetic powder with a surface of such powder being electrically insulated, and the outer peripheral yokes (50) are each formed of soft magnetic laminated plates.

Abstract: A stator of a polyphase claw pole motor includes: a compressed-powder member including a compression molded product of magnetic powder; and a metal member. At least claws of the claw pole of the stator are constituted by the compressed-powder member.

Abstract: A rotating electrical machine includes a stator having a stator core, coil groups, and a rotor. The coil groups include a first coil group located at an outer circumference side of the stator core and a second coil group located at an inner circumference side of the stator core. The first and second coil groups are formed into an annular shape by inserting unit coils into stator core slots so that the coils adjacent in a circumferential direction overlap alternately in a radial direction and so that an inside and an outside of the overlap alternate with each other. The first coil group is disposed to surround an outside of the second coil group. The first and second coil groups are disposed in a concentric manner. The unit coils constituting the second coil group have shorter circumferential lengths than the unit coils constituting the first coil group.

Abstract: A rotating electrical machine includes a stator and a rotor rotatably mounted on the stator. The stator includes a plurality of slots into which coils are insertable, a plurality of types of unit coils inserted into the slots at slot pitches differing for every type of unit coil, and a plurality of coil groups formed by arranging the unit coils in a lap winding so that the unit coils are overlapped in a radial direction of the stator. The coil groups have the same arrangement configuration before insertion into the slots and are inserted into the slots so as to be shifted from each other by a predetermined slot pitch.

Abstract: A rotating electrical machine includes a stator and a rotor rotatably mounted on the stator. The stator includes a plurality of slots into which coils are insertable, a plurality of types of unit coils inserted into the slots at slot pitches differing for every type of unit coil, and a plurality of coil groups formed by arranging the unit coils in a lap winding so that the unit coils are overlapped in a radial direction of the stator. The coil groups have the same arrangement configuration before insertion into the slots and are inserted into the slots so as to be shifted from each other by a predetermined slot pitch.

Abstract: According to one embodiment, a measuring system using an optical waveguide is provided. The measuring system has an optical waveguide, magnetic fine particles, a magnetic field applying unit, a light source and a light receiving element. The optical waveguide has a sensing area to which first substances having a property of specifically bonding to subject substances to be measured are fixed. Second substances having a property of specifically bonding to the subject substances are fixed to the magnetic fine particle. The magnetic field applying unit generates a magnetic field for moving the magnetic fine particles. The light source inputs a light into the optical waveguide. The light receiving element receives the light output from the optical waveguide.

Abstract: A permanent magnet motor includes a stator core including a core portion and chip portions each formed of dust core, a stator having a coil wound on the stator core and a rotor. The core portion includes steel plates stacked and secured to one another and an annular path portion and salient pole portions. The chip portions are attached to distal ends of the salient pole portions respectively, each chip portion having at least one axial end axially protruding from an axial end of each salient pole portion and one or more radially extending protrusions. The salient pole portions are magnetically routed by the path portion. The salient pole portions have distal end sides formed with recesses capable of accommodating the protrusions, respectively. The protrusions are accommodated in the respective recesses so that the chip portions are attached to the core portion.

Abstract: A rotating electrical machine includes a stator having a stator core and a plurality of groups of coils formed by inserting a plurality of unit coils into slots of the stator core in a lap winding manner and a rotor rotatably mounted on the stator. The plurality of coil groups includes a first coil group located at an outer circumference side of the stator core and a second coil group located at an inner circumference side of the stator core. The unit coils constituting the second coil group has shorter circumferences than the unit coils constituting the first coil group.

Abstract: A washing machine includes a water tub, an electric motor, and a control device. The motor comprises a stator including a stator coil, a rotor magnet arranged circumferentially with respect to the rotor, and a control device. The rotor magnet includes a permanent magnet. When the control device applies a first voltage to the stator coil in a wash step of the washing operation, the rotor magnet is magnetized so that a magnetic flux of the rotor magnet acting on the stator is increased without reversal of a direction of magnetization. When the control device applies a second voltage to the stator soil in a dehydration step of the washing operation, the rotor magnet is magnetized so that a magnetic flux of the rotor magnet acting on the stator is reduced without reversal of a direction of magnetization as compared with the magnetic flux in the wash step.

Abstract: An inverter device provided on a washing machine for controlling a permanent magnet motor being provided with a rotor magnet including a first permanent magnet and a second permanent magnet having a level of coercivity smaller than the first permanent magnet. An excitation current is produced to vary the amount of magnetism of the second permanent magnet to execute a dehydrate operation with a magnetic flux of the rotor magnet reduced and to execute an operation being specified to operate at a lower maximum rotation count compared to the dehydrate operation with the magnetic flux of the rotor magnet increased. When the amount of magnetism of the second permanent magnet is varied while rotation of the permanent magnet motor is stopped, a phase of the excitation current for varying the amount of magnetism is switched depending on a rotation stop position of the rotor.

Abstract: A permanent magnet motor includes a stator core including a core portion and chip portions each formed of dust core, a stator having a coil wound on the stator core and a rotor. The core portion includes steel plates stacked and secured to one another and an annular path portion and salient pole portions. The chip portions are attached to distal ends of the salient pole portions respectively, each chip portion having at least one axial end axially protruding from an axial end of each salient pole portion and one or more radially extending protrusions. The salient pole portions are magnetically routed by the path portion. The salient pole portions have distal end sides formed with recesses capable of accommodating the protrusions, respectively. The protrusions are accommodated in the respective recesses so that the chip portions are attached to the core portion.

Abstract: According to one embodiment, a measuring system using an optical waveguide is provided. The measuring system has an optical waveguide, magnetic fine particles, a magnetic field applying unit, a light source and a light receiving element. The optical waveguide has a sensing area to which first substances having a property of specifically bonding to subject substances to be measured are fixed. Second substances having a property of specifically bonding to the subject substances are fixed to the magnetic fine particle. The magnetic field applying unit generates a magnetic field for moving the magnetic fine particles. The light source inputs a light into the optical waveguide. The light receiving element receives the light output from the optical waveguide.

Abstract: A motor control device includes a magnetization control unit energizing a motor winding to change magnetic flux content of permanent magnet motor, a current detector detecting current supplied to the motor, a vector control unit including a speed/position estimation unit carrying out an operation to estimate a motor rotational speed and rotational position, the vector control unit carrying out a vector control of the motor, an induced voltage detector detecting an induced voltage of the motor based on the rotational speed, motor currents obtained by the vector control unit, output voltages of the drive unit, a winding inductance or the motor constant and a winding resistance, an induced voltage command determining unit determining an induced voltage command based on the motor rotational speed and output torque, and a magnetization current determining unit determining an amount of energization based on the induced voltage of the motor and the induced voltage command.

Abstract: A permanent magnet motor includes a rotor and a plurality of permanent magnets located inside a rotor core. One or more of the permanent magnets having relatively smaller coercive forces have a first magnetic characteristic that when a magnetizing magnetic field is caused to act on the permanent magnets, a magnetic susceptibility is substantially at 0 until reaching an inflection point during magnetization, and when exceeding the inflection point, the magnetic susceptibility enters a loop approximating to the hysteresis loop in a first quadrant, and a second magnetic characteristic that when a demagnetizing magnetic field is caused to act on the permanent magnets, a magnetic susceptibility is substantially at 0 until reaching the inflection point during demagnetization, and when exceeding the inflection point, the magnetic susceptibility enters a loop approximating to the hysteresis loop in a second quadrant.

Abstract: A washing machine has a water tank and a motor for rotationally driving a load received in the water tank and performs a washing operation including a washing process, a rinsing process, and dewatering process. The motor has a stator and a rotor. The stator has a stator coil, and the rotor has a rotor magnet including a first magnet and a second magnet. The first magnet has a permanent magnet having a high coercive force, and the second magnet has a permanent magnet having a lower coercive force than the first magnet and generating easily changeable magnetic flux. In the washing process of the washing operation, the second magnet is magnetized so that the magnetic flux of the rotor magnet acting on the stator increases, and in the dewatering process, the second magnet is magnetized so that the magnetic flux acting on the stator decreases from the level in the washing process.

Abstract: An X-ray CT device including a stationary part; a rotary part rotatable relative to the stationary part; an X-ray tube provided at the rotary part for radiating X-ray beams on an object; an X-ray detector provided at the rotary part opposing the X-ray tube, and that detects the X-ray beams passed through the object; an image processor that generates cross-sectional images of the object based on a detection signal outputted from the X-ray detector; a display that shows the cross-sectional images based on output signals delivered from the image processor; a first transmitting section configured by a rotary step-up transformer having a primary and secondary windings residing at the stationary and the rotary part respectively, and that steps up AC voltage provided by AC power source, and that further executes non-contact power transmission from the stationary part to the rotary part for supplying power to the X-ray tube.

Abstract: An inverter device provided on a washing machine for controlling a permanent magnet motor being provided with a rotor magnet including a first permanent magnet and a second permanent magnet having a level of coercivity smaller than the first permanent magnet. An excitation current is produced to vary the amount of magnetism of the second permanent magnet to execute a dehydrate operation with a magnetic flux of the rotor magnet reduced and to execute an operation being specified to operate at a lower maximum rotation count compared to the dehydrate operation with the magnetic flux of the rotor magnet increased. When the amount of magnetism of the second permanent magnet is varied while rotation of the permanent magnet motor is stopped, a phase of the excitation current for varying the amount of magnetism is switched depending on a rotation stop position of the rotor.

Abstract: A motor control device includes a magnetization control unit energizing a motor winding to change magnetic flux content of permanent magnet motor, a current detector detecting current supplied to the motor, a vector control unit including a speed/position estimation unit carrying out an operation to estimate a motor rotational speed and rotational position, the vector control unit carrying out a vector control of the motor, an induced voltage detector detecting an induced voltage of the motor based on the rotational speed, motor currents obtained by the vector control unit, output voltages of the drive unit, a winding inductance or the motor constant and a winding resistance, an induced voltage command determining unit determining an induced voltage command based on the motor rotational speed and output torque, and a magnetization current determining unit determining an amount of energization based on the induced voltage of the motor and the induced voltage command.

Abstract: A permanent magnet motor includes a rotor including a rotor core and a plurality of permanent magnets located inside the rotor core and establishing a plurality of magnetic poles. In the permanent magnet motor, the permanent magnets include a plurality of types of permanent magnets having different coercive forces. The types of permanent magnets are disposed so that each one type constitutes one magnetic pole.