Kabushiki Kaisha Yaskawa Denki

Other

Yasuhiro Miyamoto

Daisuke Morishita

Toru Shikayama

Motomichi Ohto

Eiji Watanabe

Hiroshi Tsumagari

Masaki Hisatsune

Masahiko Tanabe

Tatsuhiko Koba

Takahisa Yamada

Shinichi Nishi

Masayuki Utsunomiya

Takato Doi

Kazuhiro Maekawa

Koji Eba

Toshiteru Komatsu

Takeshi Inoue

Masafumi Tamai

Katsuyoshi Kitagawa

Nobuyuki Irie

Mayumi Umetsu

Junji Fujii

Hirofumi Inokuchi

Takaaki Yasumura

Takashi Nagase

Koichi Oba

A permanent magnet for a rotating electrical machine includes a magnet body. The magnet body includes a magnetization direction, a first side surface and a second side surface opposite to the first side surface in a first direction perpendicular to the magnetization direction, and at least one first slit passing through the magnet body in the magnetization direction. The at least one first slit extends in the first direction to the first side surface and not to the second side surface.

Permanent magnet for rotating electrical machine, rotating electrical machine, method for producing permanent magnet for rotating electrical machine

A power generator according to an embodiment includes a hollow shaped speed-increasing gear, a hollow shaped power generation unit, a rotor shaft, and a position detector. With the input shaft and the output shaft of the hollow shaped speed-increasing gear coaxially disposed with a propeller shaft, and coupled to the propeller shaft. With the input shaft of the power generation unit coaxially disposed with the speed-increasing gear, the power generation unit generates power through the output of the speed-increasing gear. The rotor shaft is coaxially disposed with the speed-increasing gear and the power generation unit and rotates integrally with a propeller while being provided in hollow portions of the speed-increasing gear and the power generation unit. The position detector detects a rotational position of the propeller by detecting the rotational position of the rotor shaft.

Power generator

This power generator is so formed that a number q of slots per pole per phase obtained by dividing the number of slots by the number of poles of permanent magnets and the number of phases of voltages is a fraction satisfying 1&#x3c;q&#x2266;3/2.

Power generator and wind power generation system

This rotating electric machine includes a rotor including a rotating shaft portion, a rotor yoke surrounding the rotating shaft portion and a rotor core, arranged on the outer peripheral surface of the rotor yoke, having a plurality of permanent magnets circumferentially arranged thereon at intervals, and a stator arranged to be opposed to the outer peripheral surface of the rotor, while the rotor yoke and the inner peripheral portion of the rotor core are fixed to each other with a fixing member.

Rotating electric machine and wind power generation system

This disclosure discloses a rotating electrical machine comprising: a stator; and a rotor; one of said stator and said rotor having a coil, the other having a plurality of magnetic pole units each forming first and second magnetic poles configured to be aligned alternately and to have mutually opposite polarities at a side of the one of said stator and said rotor, each of said magnetic pole units comprising: a unit core that a projecting part configured to protrude toward the side of the one of said stator and said rotor is formed; and a permanent magnetic provided between each of said projecting parts on the side of the one of said stator and said rotor from said unit core, said first magnetic pole being formed by said permanent magnet, and said second magnetic pole being formed by each of said projecting parts.

Rotating electrical machine, linear motion electrical machine, and wind generator system

A power generator according to an embodiment includes a rotor shaft, a slip ring, a detecting shaft, and a position sensor. The rotor shaft through which wires from a propeller are inserted rotates with the propeller. The slip ring is coupled to the rotor shaft at one end. The detecting shaft is provided at the other end of the slip ring and rotates along with the rotor shaft. The position sensor detects the rotational position of the detecting shaft, thereby detecting the rotational position of the propeller.

A linear motor comprising a mover part including; an armature module having an I shaped magnetic iron core and an armature winding of one kind wound on the periphery of the I shaped magnetic iron core through an insulating material. A non-magnetic material holder on which a plurality of armature modules are arranged in a stroke direction is provided. A base upper plate and a base lower plate are provided for attaching the non-magnetic material holder in upper and lower parts respectively. A stator part includes a plurality of field permanent magnets opposed to the I shaped magnetic iron cores through magnetic spaces and field yokes for supporting the field permanent magnets. The non-magnetic material holder has at both end parts thereof through holes for inserting bolts corresponding to the forms and the arranging pitches of the I shaped magnetic iron cores.

Linear motor

In some embodiments, a moving magnet type linear slider capable of eliminating a magnet suction force caused by a linear motor to minimize the linear guide friction is provided. The field of the linear motor includes magnet track having a horizontally arranged generally U-shaped magnetic yoke and plural pairs of field permanent magnets arranged on inner opposed surfaces of the magnetic yoke with polarities arranged alternately in a longitudinal direction of the magnetic yoke, each pair of the filed permanent magnets being arranged with opposite polarities faced with each other. The armature of the linear motor includes an armature holder mounted on the side portion of the fixed base in a vertically extended manner, and a planar coreless armature holder horizontally held by the armature holder. The stroke direction length Lof the magnet track is set to be longer than the stroke direction length Lof the armature. Furthermore, a gravity compensation spring for compensating the weight of the movable unit is provided at the bottom portion of the magnet track so as to face the fixed base.

Moving magnet type linear slider

In a moving magnet type linear actuator (), a stator () having an armature () including a magnetic iron core () fixed on a stator base () and an armature winding () wound around the magnetic iron core (); and a movable body () having a field permanent magnet () arranged oppositely to the magnetic iron core () through a magnetic gap and a magnetic holder () supporting the field permanent magnet () and movably arranged on the stator base (), the magnetic holder () is made of a non-magnetic substance, and a magnetic back yoke () is arranged on the side opposite to the armature with respect to the field permanent magnet () to from a gap between the magnetic back yoke () and the field permanent magnet () and is fixed to supporters provided on the stator base (). In accordance with this configuration, there is provided a moving magnet type linear actuator which can reduce the weight of the movable body to improve the accelerating performance and gives no problem about the life of linear guides.

Moving magnet type linear actuator

Connectors (), (), (), (), (), and () for electrically connecting lead wires of armature windings () coiled around armature blocks (), (), and () are provided at respective ends of a plurality of the armature blocks (), (), and () such that connections of the armature windings () in the respective armature blocks become parallel connections. The connector pair including the connectors (), () and the connector pair including the connectors (), (), which are provided between the armature blocks, are embodied as in-phase connections. On condition that the number of phases of the armature winding is taken as three and a magnetic pole pitch of a magnetic field is taken as &#x3c4;p, the armature blocks are spaced apart from each other at intervals of &#x2154; &#x3c4;p. As a result, there can be obtained an armature of a linear motor and a linear motor, which can facilitate processing of lead wires of the armature windings and make the operation for assembling the armature blocks efficient and which enable an attempt to increase the thrust of the motor in accordance with an increase in the stroke of the movable element.

Linear motor armature and linear motor

A linear motor including a plurality of movers (to), each of which is formed with an armature having a polyphase balancing winding (Ru to Rw), and a stator having a permanent magnet or a secondary conductor is configured such that the plurality of movers (to) are disposed on the single stator; and the polyphase balancing windings (Ru to Rw) in the respective movers (to) are connected in series. Accordingly, there can be obtained an inexpensive linear motor which is capable of driving a large machine, which is capable of canceling cogging force, which offers facilitated assembly of movers, and which can provide thermal protection of the movers with ease.

Tandem arrangement linear motor

In some embodiments, a moving magnet type linear slider capable of minimizing the effect of microvibration at the time of driving a linear motor, easily increasing the servo gain and suppressing the speed ripple is provided. The moving magnet type linear slider includes a linear motor for reciprocating a table, and a detector for detecting the relative position of the table and a fixed base. The linear motor includes an armature in which polyphase armature winding is wound around the armature core secured to a fixed base and a field permanent magnet secured to the lower surface of the table in the vertical direction and arranged between the inner side surface of the linear guide and the outside surface of the armature via gaps therebetween. The detector includes a linear scale secured to the lower surface side of the table and a sensor head secured to the upper surface side of the armature, and the central axis of the detector is substantially aligned with the thrust central axis G-G of the armature.

A moving magnet type linear actuator is provided, which can solve a problem of linear guide life even in case that magnetic attraction force between a magnet and an armature is reduced to perform a high-frequent acceleration and deceleration operation. A stator of the linear actuator includes an armaturewhich is fixed onto a stator baseand has plural coilsand linear guide railsarranged linearly so as to sandwich both sides of the armatureand a mover of the same includes a linear guide blockprovided so as to slide on the linear guide railand a field magnet provided with plural field permanent magnetswhich are arranged opposed to the armature part through an air gap, held in a hole portionA provided in anonmagnetic magnet holderand arranged so that magnetic poles of the N-pole and the S-pole are different alternately, and with a magnetic back yokearranged in the back of the field permanent magnetthrough an air gap, provided in a recess partB provided in a magnet holderand formed by laminating thin plate-shaped electromagnetic steel plates.

A permanent magnet synchronous linear motor comprising a field yoke ( ) having a plurality of permanent magnets ( ) the polarity of which is alternated and which are arranged linearly and an armature ( ) facing the array of the permanent magnets ( ) through a magnetic air gap, wherein the armature ( ) comprises an armature core ( ) having main teeth ( ) and slots ( ), an armature winding ( ) wound in the slots of the armature core ( ), and auxiliary teeth ( ) provided at both the ends of the armature core ( ). The distance &tgr; between the centers of the auxiliary teeth ( ) and the pitch &tgr; of the field poles satisfy a relation &tgr; &equals;(2 &minus;1)&times;&tgr; /2 (n is a positive integer) and the length O of the auxiliary teeth ( ) is in a relation of O<Hd<Ht where Hd is the length of the auxiliary teeth ( ) in the direction orthogonal to the array of permanent magnets and Ht is the length of the main teeth ( ) in the direction orthogonal to the array of permanent magnets. Thus a high performance permanent magnet synchronous linear motor having reduced cogging thrust can be provided.

Permanent magnet synchronous linear motor

A linear motor excellent in insulation between armature coils, easy to assemble, very small in thrust ripple, comprising a secondary side supporter attached with a secondary side consisting of a plurality of magnetic field poles, and an armature element supporter facing the secondary side via a clearance and provided with an armature element ( ) having a plurality of concentrate-wound armature coils ( ), the secondary side and the armature element ( ) being disposed facing each other and in parallel in the advancing direction, wherein field poles in the secondary side are disposed in the advancing direction of a mover with adjacent poles being unlike every Pm pitches, and a plurality of armature coils ( ) are disposed in an array in the advancing direction of the mover every Pc pitches, the coil pitch Pc&equals;5/3&times;Pm.

Growing community of inventors

Kitakyushu, Japan

Yasuhiro Miyamoto