Abstract: A magnetic geared motor includes a stator including a plurality of teeth that produce a magnetomotive force, a first rotor that rotates by the magnetomotive force of the stator, and a second rotor that, in response to rotation of the first rotor, rotates at a lower speed than the first rotor. The first rotor, the second rotor, and the stator are disposed coaxial to each other, and a plurality of magnets of different polarities are disposed in respective slot openings present between each two adjacent teeth.

Abstract: A permanent magnet-type rotary electric machine includes a stator, a first rotor, and a second rotor. The stator includes a stator core, a plurality of stator teeth, a plurality of stator slots, a plurality of stator magnets, and a stator coil. The first rotor is disposed inside the stator core relative to the plurality of stator magnets. The second rotor is disposed inside the stator core relative to a plurality of first pole pieces. The second rotor includes a plurality of second pole pieces. A proportion of the number of the plurality of stator slots to the number of poles of the plurality of second pole pieces of the second rotor is greater than 1.25 and less than 1.5, or greater than 1.5 and less than 3.0.

Abstract: Provided is a magnetic strain wave gear device that makes it possible to achieve both improvement of the efficiency of assembly work and suppression of decrease in energy conversion efficiency. A magnetic strain wave gear device includes: a stator having a stator core, a stator winding, and a stator magnet; a first rotor; and a second rotor. The second rotor includes a second rotor core provided with a plurality of rotor magnet insertion holes and a plurality of rotor magnets inserted into the plurality of respective rotor magnet insertion holes. The first rotor includes a cylindrical first rotor core and a first rotor end plate. The first rotor end plate has a rotor magnet passage hole through which the rotor magnets can be inserted into the rotor insertion holes from outside in a direction of a rotation shaft.

Abstract: A magnetic geared motor (1) includes a stator (30) including a plurality of teeth (31) that produce a magnetomotive force, a first rotor (10) that rotates by the magnetomotive force of the stator (30), and a second rotor (20) that, in response to rotation of the first rotor (10), rotates at a lower speed than the first rotor (10). The first rotor (10), the second rotor (20), and the stator (30) are disposed coaxial to each other, and a plurality of magnets (34) of different polarities are disposed in respective slot openings (31c) present between each two adjacent teeth (31).

Abstract: A magnetic geared motor includes a stator, a first inner rotor that is disposed to an inner side of the stator and rotates by a magnetomotive force of the stator, a first center rotor disposed between the stator and the first inner rotor, a second center rotor disposed to an inner side of the first inner rotor, and a second inner rotor disposed to an inner side of the second center rotor. The stator, the first center rotor, the first inner rotor, the second center rotor, and the second inner rotor are disposed coaxial to each other, and the first inner rotor includes first outer magnetic pole pairs disposed in a circumferential direction and a plurality of first inner magnetic pole pairs disposed in the circumferential direction.

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 rotary electric machine includes: a first rotor, a stator, and a second rotor that are coaxially disposed in stated order from radially centermost to radially outermost and spaced apart from one another, the stator including a plurality of pole pieces and a plurality of windings in a circumferential direction. The first rotor and the second rotor each include permanent magnets or electromagnets, the plurality of windings generate electromagnetic torque in the first rotor and the second rotor, the electromagnetic torque is magnetically transferred to the second rotor by rotation of the first rotor, or magnetically transferred to the first rotor by rotation of the second rotor, and in one of the first rotor and the second rotor, torque that is magnetically transferred from an other of the first rotor and the second rotor is superimposed on the electromagnetic torque.

Abstract: A linear vernier motor includes a stator and a mover. The stator extends in a first direction. The mover extends in the first direction and a pole interval is different from that of the stator. At least one of the stator and the mover includes: a plurality of permanent magnets arranged in the first direction and a plurality of yokes arranged in the first direction. Each of the plurality of yokes is arranged between adjacent permanent magnets. The plurality of permanent magnets is magnetized to the first direction and magnetization orientations of adjacent permanent magnets are opposite to each other.

Abstract: A magnetic wave gear device (1A, 1B, 1F) includes: a first member (10), a second member (20), and a third member (30) which are rotatable relative to one another around a rotation axis (R). The second member (20) is disposed between the first member (10) and the third member (30), and includes magnetic material pieces (21). The first member (10) includes first permanent magnets (12A, 12B). The third member (30) includes: a plurality of pole teeth (32), a pole tooth (32) being wound with a coil (33); and second permanent magnets (34B), each second permanent magnet (34B) being disposed between pole teeth (32) next to each other, and the magnetic poles of sides of the second permnanent magnets (34B) facing the second member (20) being the same pole.

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 magnetic wave gear device (1A, 1B, 1F) includes: a first member (10), a second member (20), and a third member (30) which are rotatable relative to one another around a rotation axis (R). The second member (20) is disposed between the first member (10) and the third member (30), and includes magnetic material pieces (21). The first member (10) includes first permanent magnets (12A, 12B). The third member (30) includes: a plurality of pole teeth (32), a pole tooth (32) being wound with a coil (33); and second permanent magnets (34B), each second permanent magnet (34B) being disposed between pole teeth (32) next to each other, and the magnetic poles of sides of the second permnanent magnets (34B) facing the second member (20) being the same pole.

Abstract: A linear actuator includes a coil portion and a shaft portion. The coil portion includes a plurality of coils respectively applied with AC currents having different phases from one another. The shaft portion passes through an inside of the plurality of coils. The shaft portion includes: a plurality of permanent magnets and a plurality of intermediate members. The plurality of permanent magnets is arranged along a central axis C such that opposite magnetization directions face to each other in a direction of the central axis C. Each of the plurality of intermediate members is arranged between adjacent two of the plurality of permanent magnets. A saturation magnetic flux density of each of the plurality of intermediate members is higher than a saturation magnetic flux density of each of the plurality of permanent magnets.

Abstract: A linear vernier motor includes a stator and a mover. The stator extends in a first direction. The mover extends in the first direction and a pole interval is different from that of the stator. At least one of the stator and the mover includes: a plurality of permanent magnets arranged in the first direction and a plurality of yokes arranged in the first direction. Each of the plurality of yokes is arranged between adjacent permanent magnets. The plurality of permanent magnets is magnetized to the first direction and magnetization orientations of adjacent permanent magnets are opposite to each other.

Abstract: A linear actuator includes a coil portion and a shaft portion. The coil portion includes a plurality of coils respectively applied with AC currents having different phases from one another. The shaft portion passes through an inside of the plurality of coils. The shaft portion includes: a plurality of permanent magnets and a plurality of intermediate members. The plurality of permanent magnets is arranged along a central axis C such that opposite magnetization directions face to each other in a direction of the central axis C. Each of the plurality of intermediate members is arranged between adjacent two of the plurality of permanent magnets. A saturation magnetic flux density of each of the plurality of intermediate members is higher than a saturation magnetic flux density of each of the plurality of permanent magnets.

Abstract: A method of non-invasively determining a concentration of an in-vivo component such as blood sugar level (glucose) of a subject is provided. An absorption spectrum of the subject is measured by use of near-infrared light. The concentration of the in-vivo component is determined by use of the absorption spectrum of the subject and a calibration curve. The calibration curve is prepared by determining a plurality of difference absorption spectra that are differences between a plurality of near-infrared absorption spectra of a living body and a reference absorption spectrum selected from the near-infrared absorption spectra, determining a plurality of synthetic absorption spectra, which are obtained by synthesizing each of the difference absorption spectra with a previously measured reference absorption spectrum of the subject, and performing a multivariate analysis with use of the obtained synthetic absorption spectra.

Abstract: In a rolling driving actuator used as a drive source of a power toothbrush, permanent magnets are formed flat plate shape, and constituting a moving object by being attached to grooves formed on an outer peripheral face of a yoke which is press-fitted to and fixed on a shaft. On the other hand, a tubular shaped stator, which is constituted by a coil wound around a bobbin and stationary yokes provided on both side of the bobbin in axial direction of the shaft, is provided to face an outer face of the permanent magnet or an outer face of the yoke of the moving object with a predetermined clearance so that a center axis thereof becomes coaxial with the center axis of the shaft. By supplying an alternating current to the coil, the moving object is driven in rolling driving around the axis of the shaft.

Abstract: A reciprocal linear driving unit and a rolling driving unit are adjacently provided on a common single shaft in axial direction thereof, so that the reciprocal linear driving in the axial direction and the rolling driving around the axis are performed by the single shaft, simultaneously. Permanent magnets constituting the reciprocal linear driving unit and the rolling driving unit are respectively provided on moving object side instead of stator, in other words, they are provided around the axis of the shaft, thereby respective permanent magnets can be miniaturized and light-weighted. Following to this, miniaturization, light-weighting and cost reduction of an actuator and a power toothbrush using the same can be realized.

Abstract: A linear oscillator and an electric toothbrush capable of emitting a low noise and of being assembled compact are provided. The linear oscillator, which reciprocates a shaft in an axial direction thereof, includes a plunger movable together with the shaft in the axial direction of the shaft, an elastic member for applying an axially acting resilient force to the plunger, an electromagnetic driving unit operable to reciprocate the plunger in the axial direction of the shaft at a resonant frequency when an alternating current is supplied thereto, and a fixing member restricting rotation of the plunger about an axis thereof within a predetermined angle. The electric toothbrush includes the linear oscillator and a brush head attached to the shaft for use in brushing teeth.

Abstract: An actuator includes a casing, a stationary member having a coil member and mounted in the casing and a movable member having a moving element and supported by the casing. The moving element has a shaft and is supported by the casing so as to be moved in an axial direction of the shaft and in a rotational direction having the axial direction of the shaft as its rotational axis and the moving element is moved in the axial direction and in the rotational direction by causing electric current to flow through the coil member. The stationary member includes a first stationary member for imparting to the movable member a force oriented in the axial direction and a second stationary member for imparting to the movable member a force oriented in the rotational direction, while the coil member includes a first coil member for exciting a first magnetic path passing through the first stationary member and a second coil member for exciting a second magnetic path passing through the second stationary member.

Abstract: A reciprocal linear driving unit and a rolling driving unit are adjacently provided on a common single shaft in axial direction thereof, so that the reciprocal linear driving in the axial direction and the rolling driving around the axis are performed by the single shaft, simultaneously. Permanent magnets constituting the reciprocal linear driving unit and the rolling driving unit are respectively provided on moving object side instead of stator, in other words, they are provided around the axis of the shaft, thereby respective permanent magnets can be miniaturized and light-weighted. Following to this, miniaturization, light-weighting and cost reduction of an actuator and a power toothbrush using the same can be realized.