Hitachi, Ltd.

Hitachi Car Engineering Co., Ltd.

Other

Aida Engineering, Ltd.

Hitachi Automotive Engineering Co., Ltd.

Hitachi Industrial Equipment Systems Co., Ltd.

Japan Servo Co.,ltd.

Nissan Motor Company Limited

Hitachi Metals, Ltd.

Hitachi Engineering Co., Ltd.

Hitachi Powdered Metals Co., Ltd.

Hitachi Taga Engineering, Ltd.

Fumio Tajima

Osamu Koizumi

Suetaro Shibukawa

Shouichi Kawamata

Yutaka Matsunobu

Keiji Oda

Takashi Kobayashi

Masashi Kitamura

Takashi Yasuhara

Yutaka Matsunobe

Hiroshi Katayama

Yuji Enomoto

Kunio Miyashita

Noriaki Hino

Hiroshi Kanazawa

Motoya Ito

Seiichi Narushima

Shigeki Morinaga

Shigeru Kakugawa

Noriaki Yamamoto

Nobuyoshi Mutoh

Yukinori Taneda

Hiroshi Kimura

Ryoso Masaki

Keijiro Oda

Masataka Yahara

Yuzo Kadomukai

Yasushi Sasaki

Tatsuya Yoshida

Hiroshi Nagase

Teruhiko Minegishi

Yoshihiro Yamaguchi

Hideki Nihei

Masaharu Senoh

Yoshikatu Hashimoto

Yasuhiko Honda

Takashi Ishigami

Satoshi Shimada

Kenji Miyata

Kazuo Tahara

Sanshiro Obara

Toshifumi Usui

Syooichi Kawamata

Taizou Miyazaki

Toshihiko Sakai

Masanori Kubota

Tunehiro Endo

Hiromichi Hiramatsu

Kouichi Saito

Yuji Nomoto

Kenya Takarai

Hideki Nakamura

Kazuo Kato

Satoru Kaneko

Noboru Sugiura

Takashi Sase

Shotaro Naito

Noriyoshi Takahashi

Ken Nakamura

Chio Ishihara

Toshihiko Fukushima

Toshimi Abukawa

Nobuyoshi Tsuboi

Hirohisa Yamamura

Kiyoshi Yamaguchi

Taizo Miyazaki

Shoji Ohiwa

Hiroshi Katada

Tsutomu Ohmae

Yuusuke Takamoto

Seizi Yamashita

Hideaki Kamohara

Kazuo Ohnishi

Tosio Tomite

Yoshihisa Ishikawa

Yoshiaki Honda

Hakaru Sasaki

Teruyoshi Abe

Shigeru Horikoshi

Kenichi Iizuka

Teizo Tamura

Yasushi Takano

Tsutomu Miyoshi

Yuji Sato

Michiyuki Takagi

Toshio Nakamoto

Hideaki Horie

Yasuo Noto

Tomohiko Douken

Kenichi Hironaka

Akinori Kamiya

Shunichi Tanae

Rumi Minakata

Jun Matsubayashi

Toshio Osada

Shinichiro Yokoyama

Masahide Kimura

Takashi Takahashi

Mitsuo Kudoh

Ryoichi Naganuma

Provided is a servo press machine having a configuration that allows miniaturization of the servo press machine, and a motor using the same. A servo press machine includes a servomotor, a crankshaft rotated by driving of the servomotor, a connecting rod connected to an eccentric portion of the crankshaft, and a slide connected to the connecting rod, wherein two connecting rods are connected to the crankshaft, the servomotor is an axial gap motor, a rotor of the axial gap motor is assembled with the crankshaft between the two connecting rods, and a stator of the axial gap motor is fixed to a crown in which the crankshaft is housed.

Servo press machine, motor using servo press machine, and method of assembling and detaching motor

Torque is improved in a composite torque rotating electric machine that uses permanent magnets having a low residual magnetic flux density such as ferrite magnets, and includes: a stator comprising armature windings arranged at a fixed interval at multiple positions on the inner periphery; a rotor which has a permanent magnet in a cylindrical core comprising laminated magnetic steel sheets and is arranged inside of the stator; and magnetic flux blocking units provided across the circumferential direction on the outer periphery of the rotor that block the closed loop magnetic flux generated around the stator windings. The magnetic flux blocking units can be multiple permanent magnets, with a non-magnetic body such as an air gap disposed between them. The distance between the permanent magnets and the non-magnetic part can be smaller than the interval at which the armature windings are arranged.

Composite torque rotating electric machine

A composite torque rotating electric machine includes a stator having armature windings arranged at multiple positions in a circumferential direction, a rotor having a cylindrical core, first permanent magnets arranged on axes (d) and in the circumferential direction on the outer periphery of the rotor, second permanent magnets arranged on axes (d) on the inner periphery side of the rotor across from the permanent magnets on the outer circumference side, third permanent magnets on axes (q) and extending in the longitudinally and radially of the rotor, and air gaps on the outer periphery side of the third permanent magnets and intermediate in the circumferential direction of the first permanent magnets. The radial distance between the first and second magnets is greater than the circumferential distance between the first permanent magnets and the air gaps. A rectifier having multiple slits is disposed between the first permanent magnets and the air gaps.

A motor control device which can determine a magnetic pole position for a magnetic pole position detector included in a permanent magnet motor in which the reluctance torque proportion is larger than the magnet torque proportion is provided. In a permanent magnet synchronous motor having multi-phase windings of N axes (N&#x2267;2), the windings of optionally selected K axes (K&#x2266;N) are DC excited using corresponding independent power supplies.

Motor exciting device and motor exciting method and motor control device and motor control method

A permanent magnet rotating electric machine comprises a stator having stator windings wound round a stator iron core and a permanent magnet rotor having a plurality of inserted permanent magnets in which the polarity is alternately arranged in the peripheral direction in the rotor iron core. The rotor iron core of the permanent magnets is composed of magnetic pole pieces, auxiliary magnetic poles, and a stator yoke, and furthermore has concavities formed on the air gap face of the magnetic pole pieces of the rotor iron core of the permanent magnets, gently tilting from the central part of the magnetic poles to the end thereof. In a permanent magnet rotating electric machine, effects of iron loss are reduced, and an electric car using highly efficient permanent magnet rotating electric machine are realized.

Rotating electric machine having rotor embedded-permanent-magnets with inner-end magnetic gaps and outer-end magnetic gaps, and electric car using the same electric machine

A magnetic gap is provided between a permanent magnet of a rotor and an auxiliary magnet pole portion which is arranged adjacent to the permanent magnet in a peripheral direction. A gradual change in a magnetic flux density distribution of a surface of the rotor is obtained and a cogging torque and a torque pulsation are restrained. By obtaining a reluctance torque according to the auxiliary magnetic pole, a permanent magnet electric rotating machine in which the cogging torque and the torque pulsation are restrained can be obtained and further an electromotive vehicle having the permanent magnet electric rotating machine can be provided.

Permanent magnet electric rotating machine and electromotive vehicle using permanent magnet electric rotating machine

Permanent magnet rotating electric machine and electric car using the same

The present invention comprises a stator, and a rotor which is disposed oppositely to the stator with a gap interposed. The stator comprises a stator core, and a distributed stator winding mounted to the stator core. The stator core comprises a ring-like yoke core, and a plurality of teeth cores which protrude from the yoke core in the radial direction. The rotor comprises a rotor core, and a plurality of permanent magnets embedded in the rotor core. A pair of non-magnetic portions is created inside the rotor core and on both sides of the circumferential width of a permanent magnet for one magnetic pole. In the rotor core located on the stator side of the pair of non-magnetic portions, a pair of magnetic paths is created as the result of the creation of the pair of non-magnetic portions. Furthermore, a groove or hole is created on the outer circumferential portion of the rotor core and between the adjacent magnetic poles.

Permanent magnet type generator and hybrid vehicle using the same

A rotating electric machine comprises a stator having stator salient poles, three-phases windings would around said stator salient poles, a rotor rotatable held inside the said stator, and permanent magnets inserted into said rotor and positioned opposite to said stator salient poles. The three-phase windings are concentratively wound around each of the stator salient poles, with windings of each phase wound around at more than one stator salient pole. The windings of each phase have a phase difference of voltage between at least one of the windings and the other.

Driving apparatus

A pump is driven by a compact electric motor in which a coil is disposed in a ring form around and along a stator core which has a plurality of claw magnetic poles that extend alternately from both ends of one member of the stator core toward the end of the other member thereof. A stator core can be made from a compressed powder core by molding with resin, with the molded portion able to serve as a partition separating pump and motor units.

Electric pump

A rotating electrical machine comprises a stator and a rotor; the stator comprising a stator core having teeth and slots, and stator windings disposed in the slots, wherein the stator core is made of laminated steel sheets, teeth and slots of the steel sheet are made by etching, and the thickness of the steel sheet is between 0.05 mm and 0.30 mm. Specifically, it is preferable that the steel sheet used herein be a silicon steel sheet containing crystalline particles.

Rotating electrical machine

A cylindrical linear motor includes a stator and a movable element disposed via a clearance with respect to the stator and movable rectilinearly with respect to the stator. The movable element has a plurality of permanent magnets fixed to a movable element core. The stator salient polesare pitched at &#x3c4;s and the permanent magnetsare pitched at &#x3c4;p so that a relationship of 3/4&#x3c;&#x3c4;p/&#x3c4;s&#x3c;3/2 is established.

Cylindrical linear motor and a vehicle using the same

Growing community of inventors

Taga-gun, Japan

Fumio Tajima