Abstract: A three-phase reactor according to an embodiment includes a first plate iron core and a second plate iron core disposed oppositely to each other; a plurality of cylindrical iron cores disposed between the first plate iron core and the second plate iron core orthogonally to the first plate iron core and the second plate iron core, the iron cores being disposed rotationally symmetrically with respect to an axis equidistant from central axes of the iron cores, as a rotation axis; and a plurality of coils each wound on each of the iron cores.

Abstract: A transmission apparatus includes a memory, and a processor coupled to the memory and configured to process communication performed via logical-links established between the transmission apparatus and ONUs coupled to branch ends of a transmission line, perform, for each of the logical-links, a setting process for the communication for the ONUs, acquire, after the setting process, processing-information relating to processing of the communication from the ONUs for each of the logical-links, and store the processing-information in a database, acquire, in accordance with timings at which the logical-links have been re-established after disconnection, processing-information of the logical-links from the ONUs, and make a comparison of the processing-information with the processing-information stored in the database, and omit, in accordance with a result of the comparison, part of the setting process for the logical-links for which the processing-information acquired from the ONUs coincide with the processing-infor

Abstract: A film thickness measurement method capable of measuring the film thickness of a coating film in a short period of time while maintaining the advantages of the destructive measurement method that a high measurement accuracy can be obtained are provided. A film thickness measurement method according to an embodiment is a film thickness measurement method for measuring, in a coating film 10 including a plurality of films laminated in layers, the film thickness in each of layers 1-4, the method including: a working step for performing cutting work on the coating film 10 in such a way that the coating film 10 has a predetermined gradient; and a measuring step for deriving the film thickness in each of the layers 1-4 by measuring distances of boundaries 15a-15e of the respective layers 1-4 in the coating film 10 exposed as a result of the cutting work.

Abstract: A multi-phase transformer includes a centrally-disposed first core, a plurality of second cores each provided outside the first core so as to constitute a loop-shaped magnetic path with respect to the first core, and a primary winding and a secondary winding wound on each of the second cores.

Abstract: A rack-and-pinion type steering apparatus 1 comprises a gear case 3 made of aluminum or an aluminum alloy and having a hollow portion 2; a steering shaft 6 rotatably supported by the gear case 3 through rolling bearings 4 and 5; a pinion 7 which is provided integrally on a shaft end portion of the steering shaft 6 and is rotatably supported in the hollow portion 2 by the gear case 3 through the steering shaft 6; a rack bar 9 on which rack teeth 8 meshing with the pinion 7 are formed; a rack guide 10 which is disposed in the hollow portion 2 of the gear case 3 and supports the rack bar 9 slidably; and a spring 11 constituted by a coil spring for pressing the rack guide 10 toward the rack bar 9.

Abstract: A reactor includes a core body; a first end plate and a second end plate which sandwich and fasten the core body; and a plurality of axis portions disposed in the vicinity of an outer edge portion of the core body or outward of the core body and supported by the first end plate and the second end plate.

Abstract: A reactor includes a core body; a first end plate and a second end plate which sandwich and fasten the core body; and an axis portion which passes through the center of the core body and is supported by the first end plate and the second end plate. The center of the core body includes a region at which a magnetic field is not formed.

Abstract: An electric motor including a rotor including magnetic pole units and a stator including slots facing an outer peripheral surface of the rotor. Each of the magnetic pole units is bulged to an outside in a radial direction so that a waveform of a magnetic flux density generated from the rotor is a sine wave shape, and a concave part or convex part which is small enough to prevent changing of a waveform cycle of cogging torque determined by a least common multiple of the number of slots and the number of magnetic poles of the rotor, is formed at a central part in a circumferential direction of an outer peripheral surface in each of the magnetic pole units.

Abstract: A packet transfer method includes requesting a terminal apparatus for a physical address corresponding to a logical address of a transmission source of a packet; determining legality of a correspondence relationship between the physical address and the logical address by comparing a physical address indicated by a response from the terminal apparatus with the physical address of the transmission source of the packet; storing a first set of the physical address of the transmission source and the logical address of the transmission source of the packet, when it is determined that the correspondence relationship is legal; when a new packet is received, determining whether a second set of a physical address of a transmission source and a logical address of the transmission source of the new packet coincides with the first set; and transferring the new packet, when it is determined that the second set coincides with the first set.

Abstract: A three-phase reactor includes: an outer peripheral iron core; and at least three iron-core coils that come in contact with an inner surface of the outer peripheral iron core or are joined to the inner surface. The at least three iron-core coils include corresponding iron cores and corresponding coils wound around the iron cores, and gaps that can magnetically connect one iron-core coil of the at least three iron-core coils and an iron-core coil adjacent to the one iron-core coil to each other are formed between the one iron-core coil of the at least three iron-core coils and the iron-core coil adjacent to the one iron-core coil.

Abstract: A multi-phase reactor is configured to include a first core arranged at a center of the reactor; a plurality of second cores provided outside the first core and arranged so that each of magnetic paths with respect to the first core is in a loop shape; and one or a plurality of windings wound around each of the second cores. With this configuration, the multi-phase reactor capable of setting a constant value of inductance for each phase is provided.

Abstract: A communication method executed by a processor included in a relay device, the communication method includes receiving a target packet among a plurality of segmented packets generated by dividing a transmission packet, the plurality of segmented packets including a same identifier as that of the transmission packet; storing the target packet into a memory, when no error is detected from the target packet; discarding one or more packets stored in the memory and including a same identifier as that of the target packet, when an error is detected from the target packet; generating a discard request including an identifier of the transmission packet, and information requesting to discard a packet including the identifier, when the discarded one or more packets do not include a head packet among the plurality of segmented packets; and transmitting the discard request to a transmission destination to which the head packet is transmitted.

Abstract: A three-phase reactor includes: a central iron core; an outer peripheral iron core surrounding the central iron core; and at least three connecting units that magnetically connect the central iron core and the outer peripheral iron core to each other, in which each of the connecting units includes at least one connecting iron core, at least one coil wound around the connecting iron core, and at least one gap.

Abstract: An active object detection sensor is provided which allows an installation worker to easily adjust a detection area, and further identify an optimum position of a guide mark in a touch detection area. The active object detection sensor used for opening/closing of automatic an opening/closing unit (3) includes: an object determination unit (52) that during an operation mode determines that an object is in a detection area (A) when a detection level of a detection beam received by a receiver (22) exceeds an operation threshold to output an object detection signal; and a detection level indication unit (43) that during an adjustment mode indicates the detection level of the detection beam received by the receiver (22).

Abstract: A packet transmission apparatus receives a first packet identified by a first index. Upon a first determination on the presence of a first entry corresponding to the first index in a table storing entries corresponding to respective indices, the processor registers an entry into the table in absence of the first entry and updates the first entry in presence of the first entry. Upon a second determination on the presence of a third entry not updated for a first period of time in the table, the processor deletes the third entry in presence of the third entry. The processor skips the first determination when the first packet is received during a first time zone determined on basis of information indicating a reception state of packets identified by the first index. The processor skips the second determination for an entry corresponding to a packet received during the first time zone.

Abstract: A method for producing a magnet plate for a linear motor is provided. The magnet plate comprises a base plate and a plurality of magnets juxtaposed to one another on a surface of the base plate. The method comprises providing the plurality of magnets on a surface of the base plate at a certain interval, placing the base plate into a mold, supplying a resin material into the mold, so as to form a resin molding covering the plurality of magnets on the surface of the base plate by means of injection molding, and magnetizing the plurality of magnets.

Abstract: A method for producing a magnet plate for a linear motor is provided. The magnet plate comprises a base plate and a plurality of magnets juxtaposed to one another on a surface of the base plate. The method comprises providing the plurality of magnets on a surface of the base plate at a certain interval, placing the base plate into a mold, supplying a resin material into the mold, so as to form a resin molding covering the plurality of magnets on the surface of the base plate by means of injection molding, and magnetizing the plurality of magnets.

Abstract: A linear motor includes a plurality of magnets arranged at equal intervals, and an armature arranged opposite to the magnets and including an armature core having a plurality of teeth extending toward the magnets. The teeth include a first tooth located at one end in the thrust direction and a second tooth located at the other end on the opposite side. The first tooth and the second tooth have different dimensions or shapes so as to reduce cogging force generated due to the structure of the armature core at the ends in the thrust direction.

Abstract: An electric motor includes a stator having a core back which varies in width in a circumferential direction, and a rotor provided with permanent magnets. In the electric motor, cogging torque is generated M times during one revolution of the rotor, due to the number of magnetic poles of the rotor and the varied shape of the core back. The core back is provided with a step shift by an angle obtained by multiplying (360/M/2) degrees with an odd number. According to one embodiment, the core back may be provided with holes, concave portions or convex portions, so as to provide the core back with the step shift.

Abstract: An optical divider is disposed, in front of at least one of the transmitter and receiver elements, therebetween, and at least one of a transmission and reception side, and has a plurality of optical dividing pieces each having an optical deflection surface on which an angle of a detection ray is varied to a plurality of angles for dividing the detection ray toward a plurality of division areas. The optical deflection surface on at least one of the transmission and reception side is set to have a given angle, to assign at least one of the detection ray from the transmitter elements and toward the receiver elements, to a given division area, such that a combination of the transmitter and receiver elements forming one of the division areas is different from a combination of the transmitter and receiver elements forming another one of the division areas.