Hitachi, Ltd.

The Tokyo Electric Power Company, Incorporated

Hitachi Metals, Ltd.

Hitachi Koki Co., Ltd.

Yukinori Taneda

Noriaki Yamamoto

Fumio Tajima

Yuji Enomoto

Suetaro Shibukawa

Takashi Kobayashi

Osamu Koizumi

Masaharu Senoh

Hiromichi Hiramatsu

Takashi Ishigami

Motoya Ito

Toshihiko Sakai

Noboru Sugimoto

Kiyoshi Yano

Hideki Nakamura

Shigeki Morinaga

Yutaka Matsunobu

Shinichi Sakamoto

Masashi Kitamura

Kiyoshi Yamaguchi

Akio Yasukawa

Hirohisa Yamamura

Shun Suzuki

Hakaru Sasaki

Mitsunobu Isobe

Tatsuya Shigemura

Kazuo Kimura

Shinichiro Yokoyama

Tatsukichi Matsuura

Masaaki Aida

Shinichi Tsuyuki

Sei Hoshizawa

Katsuya Nagayama

Mitsuo Kusano

Tsuneo Simozaki

Toshiyuki Sawaguchi

Yoshio Hashimoto

The rotary machine is composed of the rotor having magnetic poles and the stator having the stator yoke portion constituting the iron core tooth portion wound by the stator winding and the flux flow path of the magnetic poles. The rotor is composed of a metallic material having ferromagnetic parts and non-magnetic parts as a member and has a magnetic barrier area composed of the slit portion for blocking the bypath magnetic path in the periphery of the rotor and the non-magnetic parts. The rotary machine that produced torque can be increased sufficiently and the mechanical strength during high-speed running is improved and an electrical vehicle using it.

Rotary machine having bypath magnetic path blocking magnetic barrier

A method for manufacturing an insulated coil for use in an electromotive machine includes an aligning and winding step for forming a coil by aligning and winding a wire coated with insulating material; an insulator forming step for winding or coating an insulator around a slot inserting portion of the coil which is formed in the aligning and winding step and applying an adhesive layer between the insulator and the slot inserting portion; and a shaping step for shaping and fixing the wire and the insulator of the slot inserting portion into a unit through melting by increasing the temperature thereof and thereafter cooling the adhesive layer of the slot inserting portion , around which the insulator is wound or coated and applying the adhesive layer therebetween in the insulator forming step, under a restrained condition using a shaping metal mold.

Method for manufacturing an electromotive machine having an insulated coil

A wire bonding method and apparatus implement the flatly thinner plastic deformation for the joint section of a wire, which has a diameter ranging 100-600 &mgr;m, on its feed side, feed out and position the flatly deformed wire joint section to a target joint surface, and join the wire to it by pressing the positioned wire joint section, with vibration being applied, onto the joint surface with a ultrasonic wire bonder. A high-power semiconductor device fabricated based on this scheme has a long life of wire joints.

Wire bonding method and apparatus and semiconductor device

A motor having a lap winding structure and a manufacturing method therefor, wherein inserts of two different coils are installed side by side in one slot of a stator in a circumferential direction of the stator. All the coils are inserted in slots in succession. Further, a stator having semi-closed type slots formed by protuberances oriented in different directions, is used to control a reduction in the magnetic flux at the inlet of a slot and also to prevent coils from coming off. In a motor having coils of a plurality of phases for generating a rotating magnetic field at a stator, the contact portion of the coil of the desired phase among the coils of the plurality of phases and a portion rising from a slot toward the axis of a core are aligned and disposed to have a shape which prevents them from interferring with end portions of the coils of other phases.

Structure and manufacturing method for motor and stator

An electric motor, wherein a space factor of a coil in a stator or a rotor is enhanced, and which has a central part core comprising a plurality of laminated electromagnetic steel plates stamped out into a predetermined slot sectional shape and an end part core which is disposed on at least one end part toward a laminating direction of the central part core and a core shape of the end part core is different from the core shape of the central part core.

Electric motor having a stator with an end core part having a different shape than a central core part

For achieving small-sizing and high efficiency by improving heat radiation of coils, and further for simple-construction to be easily disassembled, thereby being environment-friendly from a view point of recycling, an electric rotating machine comprising: a stator,being constructed by inserting coils,into slots,of a stator core,; an outer frame,being divided into a plurality thereof, so as to cover periphery of the stator core of said stator; a pair of bearing holder portions,and,, each having a fitting portion,or,to be fitted into an inner diameter reference surface,at both end portions of said stator and being provided with a bearing,or,at an axial center portion thereof, and being attached at both sides of said stator core so as to cover coil end portions dropping out at both sides of said stator; a squeezing mechanism (,) fixing the outer frame at an outer periphery of the stator core, by a wedge function between each of the bearing holder portions and the outer frame due to a squeezing function of attaching the each of said pair of bearing holder portions at both sides of said stator core; and a rotor,being formed with an escaping portion for escaping from an outer diameter of a portion opposing to a fitting portion of each of said bearing holder portion, rotatably positioned within said stator core.

Electric rotating machine

The present invention is characterized in that a rotary machine attempts to lower the resistance of each coil and realize improvement of efficiency and miniaturization of a motor by shortening the end portion of a coil to be inserted into a stator, and the constitution thereof is that the coil end portion of a stator coil has a shape that a conductor raised and looped back from a slot provided in the core on the rotor side is closer to the end face of the aforementioned core than a conductor raised and looped back in the aforementioned slot on the opposite side of the rotor, and the aforementioned constitution has a stator coil having a loopback shape passing a location other than above the adjacent slot surface. The present invention is also a method for manufacturing a rotary machine characterized in that the coil end portion of a stator coil is held horizontally by a holding member, and the holding member is rotated by finely moving the rotational center from the rotor side to the opposite side of the rotor with the slot insertion portion provided in the core restricted, and the aforementioned coil end portion is formed in the loopback shape.

Rotary machine and manufacturing method therefor

An amorphous magnetic core is arranged to be obtained by cutting a plurality of amorphous sheets to have a predetermined cut length by a cutter device and supplying the cut sheets to a rectangularly forming device, the sheets being supplied from an uncoiler device including a plurality of reels around which the sheets are wound, by winding the sheets of a predetermined number around a forming mandrel successively to form them into a rectangular shape, thereby forming the magnetic core, and by subjecting the magnetic core to magnetic annealing in an annealing device.

Method for manufacturing amorphous magnetic core

A method of assembling a transformer core in which a lamination of rectangular plates formed of a magnetic material is inserted in the spaces in primary and secondary transformer coils, and in which the opposite ends of the lamination are brought into abutment each other to form the lamination into an annular shape. The lamination of the magnetic material plates is bent into a U-like shape with the transformer coils thereon and is magnetized by energizing the transformer coils, while the opposite ends of each magnetic material plate are restrained from being brought closer to each other. The opposite ends of the laminated magnetic material plates are successively released from the restrained state from the innermost opposed ends of the U-like shape to attract and closely contact each other by the magnetic force. The method is carried out with an apparatus having a flat plate on which the lamination of magnetic material plates is placed, a pair of guide plates having parallel vertical surfaces and used to support the magnetic material plates so that the plates are maintained in the state of being bent in the U-like shpae, a pair of pressing members for restraining the opposite end portions of each magnetic material plate from being brought closer to each other, a driver for moving the pair of pressing members step by step toward the open end of the U-like shape; and a device for magnetizing the end portions of the U-shaped magnetic material plates by energizing the transformer coils.

Method of and apparatus for assembling a transformer core

An electric wire is wound as coil turns in slots in electric rotating machinery component such as a stator or an armature. The wire as it is supplied from a nozzle or flyer is guided by movable formers into successive layers of coil turns in the slots without forming an unwanted dead space in the slots. The formers are moved in radial increments to provide successive spaces in the slots for allowing the successive coil turn layers to be neatly laid in the spaces.

Apparatus for winding coils in electric machinery

A tension control apparatus in a winding machine for controlling tension applied to a continuous electric wire wound around a bobbin to form a perfect layer coil in such manner that tension of the electric wire is maintained substantially constant independently from variations in a feeding speed of the wire. Rotating positions of the bobbin preceding to those rotating positions by a magnitude corresponding to a time constant of brake means at which the rotation of the bobbin is to be changed among an accelerating rotation mode, a decelerating rotation mode and a constant speed rotation mode are preset in control means together with brake voltages corresponding, respectively, to the rotation modes through programming. The programmed rotating positions are each compared with a detection signal produced from detecting means for detecting actual rotating position of the bobbin. Upon occurrence of coincidence between the two rotating positions, a brake voltage corresponding to the succeeding rotation mode is applied to the brake means, whereby an appropriate braking force is produced upon transition to the succeeding rotation mode thereby to maintain the tension of the electric wire to be substantially constant.

Apparatus for controlling tension applied onto an electric wire in a

A perfect layer coil winding apparatus capable of automatically forming a perfect layer coil from the initial stage of winding operation without being affected by non-uniformity in diameter of a wire and width of a bobbin for winding the wire thereon is disclosed which performs the following operation: the width of the bobbin is calculated from the position of each of two flanges which is detected by each of two electric micrometer, the number of turns per layer is calculated from the width of bobbin and the diameter of wire, the winding width of the bobbin required to conduct the perfect layer coil winding from the number of turns per layer to adjust the winding width of the bobbin, the supply position of wire is adjusted on the basis of the position of first flange, the diameter of wire and the standby position of a pair of rollers, the bobbin is rotated with the wire pushed against the first flange by a push plate to start the winding operation, and when the degree of rotation of the bobbin reaches a predetermined degree, the push plate is spaced apart from the bobbin and the supply position moves in synchronism with the rotation of the bobbin while following a position on the bobbin at which the wire is wound round the wire, with the delay of a predetermined amount.

Perfect layer coil winding apparatus

A covered wire wrapping tool comprising a covered wire-cutting and cover-stripping device for cutting an elongated continuous covered wire into covered wires of a predetermined length and for stripping covers from a leading and trailing end portions of a severed covered wire, and a wrapping bit device including a single bit having therein an eccentric groove into which the cover-stripped leading and trailing end portions formed by the covered wire-cutting and cover-stripping device are successively loaded. The bit with the cover-stripped leading or trailing end portion loaded in the eccentric groove is rotated to wrap and connect the cover-stripped leading or trailing end portion about and to a terminal of an electrical component.

Covered wire wrapping tool

A pick and place unit adapted to hold an article at an article feeding position, elevate the article to a predetermined height, subsequently transport the article in the horizontal direction to a place above an assembling position, let down the article vertically to the assembling position, and release the article, wherein the respective operations of elevation, horizontal movement and let-down can be effected in good order by the output of a single driving device.

Growing community of inventors

Yokohama, Japan

Yukinori Taneda