Abstract: A rotary electric machine, wherein the rotation direction of a rotor is a defined direction, a groove is provided in a rotor core on the radial outside with respect to permanent magnets, and the groove is provided in a position inclined from the centerline between the permanent magnets within a magnetic pole head and at the same time in a position excluding an end portion of a permanent magnet insertion hole on the radial outside, in order to enable a reduction in a no-load induced electromotive force and prevention of a decrease in output.

Abstract: The present invention can achieve a highly efficient permanent-magnet synchronous motor that can obtain output in a high-speed area without prolonging the axis of the permanent-magnet synchronous motor. The present invention provides a highly efficient permanent-magnet synchronous motor that can obtain output in a high-speed area without prolonging the axis of the permanent-magnet synchronous motor, in which stator magnetic poles are formed by dividing a magnetic pole in each phase into a plurality of parts and placing them in a circumferential direction with respect to a rotational axis, at least one divided stator magnetic pole being made movable in the circumferential direction with respect to the rotational axis, and the phase of the movable stator is controlled.

Abstract: It is an object of the present invention to make it possible to easily wind a stator winding, enhance an occupied ratio in a stator core, reduce a winding resistance because there is no coil end, and change a field magnetic flux in accordance with a use. Stator pawl magnetic poles of a stator core extend from both sides in an axial direction alternately at locations opposed to a rotor to form a plurality of magnetic poles. With this stator core, it is only necessary to annularly wind a stator winding. Therefore, it is possible to enhance operability and an occupied ratio, and since there is no coil end, it is possible to reduce winding resistance. Since the rotor is a Randall type rotor having a field winding and a rotor pawl magnetic pole, it is possible to change the field magnetic flux in accordance with a use.

Abstract: In a permanent magnet type electrical rotating machine having coils 12 with a deviated electrical angle phase at their magnetic pole positions, a relation of T2>T1 is satisfied where T1 is the number of turns of each of the coils and T2 is the number of turns of each of other coils, or alternatively a relation of R2<R1 is satisfied where R1 is a magnetic resistance of a tooth around which each of the coils is wound and R2 is a magnetic resistance of a tooth around which each of other coils is wound.

Abstract: This invention provides a perpendicular magnetic recording medium which has magnetic layers of a stabilized laminated structure and excels in the recording and reproducing property. The perpendicular magnetic recording medium of this invention comprises at least an underlayer, a seed layer, a first intermediate layer, a second intermediate layer, a first magnetic recording layer, a second magnetic recording layer, and a protecting layer laminated in the order mentioned on a nonmagnetic substrate. The first intermediate layer is formed of an alloy having Ru as a main constituent and the second intermediate layer is formed of a CoCr alloy containing no Ru. An alloy layer of a composition having Ru element as an essential constituent is sandwiched between the first magnetic recording layer and the second magnetic recording layer. Further, the first magnetic recording layer is formed of a magnetic alloy containing Ru.

Abstract: It is made easy for a stator winding to be wound around a stator core and degradation in efficiency is prevented as much as possible. A stator (6) includes a plurality of phases, i.e., of circumferentially divided stator magnetic poles (6a, 6b, 6c). The stator magnetic poles (6a, 6b, 6c) are each composed of an arcuate stator core (13) having a plurality of axially extending claw poles (16b) and a circumferentially elliptically wound stator winding (14). The stator magnetic poles (6a, 6b, 6c) are magnetically divided; therefore, magnetic flux leakage is reduced to improve efficiency. Air flowing between the stator magnetic poles (6a, 6b, 6c) can improve a cooling effect.

Abstract: An electrical rotating machine with permanent magnets which is configured such that the ratio of the number of magnetic poles of permanent magnets 3 to the number of magnetic poles of coils 12 is at 10:9 or 8:9. The coils 12 are configured such that a middle coil U? and two adjacent coils U+, U+ on both sides thereof are in-phase connected to be in-phase coils for each phase, and there is satisfied the relationship that T2>T1 and T2>T3, where T2 is the turn number of the middle coil U?, and T1 and T3 are the turn numbers of the adjacent coils U+, U+.

Abstract: An alternator for a vehicle includes: a stator that is configured by a concentrated winding system in that a stator coil for a single phase is wound on a single pole; and a rotor with 16 or more poles, that is disposed to face the stator so as to be rotatable with a gap intervening therebetween, wherein a pole ratio of the rotor and the stator is 2:3.

Abstract: A rotating electrical machine includes: a claw pole stator constituted with a stator core that includes a plurality of claw poles and a stator coil wound inside the stator core; and a rotor rotatably disposed at a position facing opposite the claw poles. The stator core is constituted of split blocks each corresponding to at least one of magnetic pole pairs each made up with two claw poles assuming different magnetic polarities when an electric current is supplied to the stator coil.

Abstract: An AC generator comprises a rotor and a stator having a three-phase winding. A three-phase inverter is connected to the three-phase winding. Here, the three-phase winding comprises at least two independent three-phase windings. Switching elements for respective phases of the three-phase inverter are connected in parallel by the number of the independent three-phase windings, and in-phase windings are individually connected to their parallel switching elements.

Abstract: A voice recognition estimating apparatus for a voice recognition apparatus, including a voice data property generator that generates properties of voice data used to determine, based on an estimation item, a feature of synthetic voice data. The estimation item is used to estimate a performance of the voice recognition apparatus. The voice data property generator includes an acquisition unit that acquires vocabulary data and unnecessary word data as the estimation item. The unnecessary word data indicates an unnecessary word inserted in the vocabulary data and an insertion position of the unnecessary word. The voice data property generator also includes a generator that generates the properties of the voice data. The properties of the voice data include selected voice quality data items, the vocabulary data and the unnecessary word data.

Abstract: A magnetic alloy for a magnetic recording medium contains 40 to 60 at % of Pt and 60 to 40 at % of at least three species selected from the group consisting of Fe, Co, Mn and Cr as 3d transition metal elements. The magnetic alloy has a Co content of 10 to 0 at %, has an average of valence electron numbers in the 3d transition metal elements of 7.5 to 8.0 based on compositional proportions and has an order parameter S of 0.5 to 1 that is calculated from: S=[{F(002)2/F(001)2}×{L(002)/L(001)}×{(A(002)/A(001)}×{I(001)/I(002)}]1/2, in which F (plane direction), L (plane direction), A (plane direction) and I (plane direction) represent structure factor, Lorentz factor, sorption factor and integrated intensity as measured through X-ray diffraction (?/2?) of the magnetic alloy in a corresponding plane direction, respectively.

Abstract: An electric rotating machine which comprises: a magnet rotor which has a rotor yoke having a magnetic attachment surface extending in a peripheral direction, and multiple permanent magnets for constituting a magnetic field which are intermittently arranged in the peripheral direction of the rotor yoke and are attached on the magnetic attachment surface; and a stator in which armature coils are wound around an armature core having a magnetic pole portions opposed to magnetic poles of the magnet rotor, wherein a large number of grooves which extend in the peripheral direction of the rotor yoke are provided on the magnet attachment surface of the rotor yoke.

Abstract: An electrical rotating machine with permanent magnets which is configured such that the ratio of the number of magnetic poles of permanent magnets 3 to the number of magnetic poles of coils 12 is at 10:9 or 8:9. The coils 12 are configured such that a middle coil U? and two adjacent coils U+, U+ on both sides thereof are in-phase connected to be in-phase coils for each phase, and there is satisfied the relationship that T2>T1 and T2>T3, where T2 is the turn number of the middle coil U?, and T1 and T3 are the turn numbers of the adjacent coils U+, U+.

Abstract: A rotary machine having a stator composed of a stator iron core having a plurality of slots formed in the direction of the rotation axis and stator windings inserted into the plurality of slots, wherein the stator windings are composed of a plurality of conductors respectively inserted into the plurality of slots in the direction of the rotation axis and the stator has a connection ring having slots into which the plurality of conductors are inserted in the direction of the rotation axis.

Abstract: It is an object of the present invention to make it possible to easily wind a stator winding, enhance an occupied ratio in a stator core, reduce a winding resistance because there is no coil end, and change a field magnetic flux in accordance with a use. Stator pawl magnetic poles of a stator core extend from both sides in an axial direction alternately at locations opposed to a rotor to form a plurality of magnetic poles. With this stator core, it is only necessary to annularly wind a stator winding. Therefore, it is possible to enhance operability and an occupied ratio, and since there is no coil end, it is possible to reduce winding resistance. Since the rotor is a Randall type rotor having a field winding and a rotor pawl magnetic pole, it is possible to change the field magnetic flux in accordance with a use.

Abstract: It is made easy for a stator winding to be wound around a stator core and degradation in efficiency is prevented as much as possible. A stator 6 includes a plurality of phases, i.e., of circumferentially divided stator magnetic poles 6a, 6b, 6c. The stator magnetic poles 6a, 6b, 6c are each composed of an arcuate stator core 13 having a plurality of axially extending claw poles 16b and a circumferentially elliptically wound stator winding 14. The stator magnetic poles 6a, 6b, 6c are magnetically divided; therefore, magnetic flux leakage is reduced to improve efficiency. Air flowing between the stator magnetic poles 6a, 6b, 6c can improve a cooling effect.

Abstract: According to an aspect of the invention, there is provided an optical pick-up for an optical disc drive, which is provided with an objective lens configured to converge a laser beam emitted from a laser source on a recording surface of an optical disc, spherical aberration caused by the objective lens being compensated at a predetermined setting temperature of the objective lens, a heating unit configured to be driven to heat the objective lens, a spherical aberration detection unit which detects amount of spherical aberration caused by the objective lens, and a driving unit that drives the heating unit in accordance with the amount of the spherical aberration detected by the spherical aberration detection unit, the driving unit driving the heating unit when the spherical aberration detected by the spherical aberration detection unit is positive, the driving unit stopping driving the heating unit when the spherical aberration is zero or negative.

Abstract: A single-phase permanent magnet motor control apparatus, in particular, a low price, flat output torque, low vibration, low noise single-phase permanent magnet motor control apparatus, and a fan and pump using such a single-phase permanent magnet motor control apparatus are provided. In a single-phase permanent magnet motor control apparatus for driving a single-phase permanent magnet motor by using a DC power supply, a converter for converting DC to AC, and a control circuit for controlling the converter, a motor current measuring unit, a terminal voltage measuring unit, a correction unit for correcting an impedance drop in motor constants, and a calculation unit for finding an induced voltage to be obtained by control are included, and a polarity of a terminal voltage is determined on the basis of a value of the found induced voltage.

Abstract: An optical disk drive for recording information on a recording surface of an optical disk and reading information recorded in the optical disk is provided. The optical disk drive includes a spindle to rotate the optical disk and a carriage movable in parallel with a tracking direction of the optical disk. The carriage includes a laser light source to emit laser light, a collimator lens to convert divergent light into parallel light and is arranged with an optical center thereof being in a farther and offset position with respect to an optical axis of the laser light, a reflecting mirror to receive and deflect the laser light transmitted through the collimator lens in a direction perpendicular to the recording surface of the optical disk, and an objective lens to converge the laser light deflected by the reflecting mirror on a position corresponding to the recording surface of the optical disk.