Fujitsu General Limited

Nissan Motor Company Limited

Tomonori Kojima

Masaki Yamada

Hirokazu Matsuzaki

Yoichi Tanabe

Toshiaki Tanno

Masanori Murakami

Takushi Fujioka

Hidetaka Terakubo

Ken Maeyama

Hisao Igarashi

Takayuki Shinohara

Shinichi Yamada

Yoshikazu Tanaka

Kenji Narita

Takashi Suzuki

Kenta Suzuki

Yuichi Shibukawa

Atsushi Itagaki

Norio Tosu

Shinichiro Katagiri

Yoshiyasu Horiuchi

Hitoshi Kurita

Tomohiro Kashiwagi

Hiroshi Okutsu

Motoaki Fujimoto

Yosuke Matsui

Rei Omata

Hiroo Kojima

There is provided an electric motor that can be downsized in a rotation axis direction and can also suppress the deformation of a bearing and a bearing house portion along with the deformation of a resin shell. The electric motor includes: a columnar rotor; a shaft disposed along a rotation axis of the rotor; a cylindrical stator core disposed on an outer circumferential side of the rotor; a resin shell that covers the stator core; a bearing that rotatably supports the shaft; and a bearing house portion that stores the bearing. The resin shell includes an annular portion integral with the stator core, and an end surface portion connected to an end portion of the annular portion and expanding from the annular portion to an inner circumferential side. The end surface portion includes a connection portion to be connected to the bearing house portion. The bearing house portion includes a tubular portion and a flange portion extending from an end of the tubular portion to the outer circumferential side in the radial direction. An outer circumferential edge portion of the flange portion is fixed to the connection portion of the resin shell.

Electric motor that can be downsized in a rotation axis direction

Disclosed are a single rotor-type axial gap motor with low magnetic loss and high output, and a pump device using the axial gap motor. A first contact surface () is provided on the lateral surface in one circumferential direction of a yoke strip (), and a second contact surface () is provided on the lateral surface in the other circumferential direction of the yoke strip (), wherein the first contact surface () and the second contact surface () are aligned with each other. Defining Asand Asas the surface areas (As) of the first and second contact surfaces (), and Apand Apas the projected surface areas (Ap) of the lateral surfaces of the aforementioned yoke strip seen from the circumferential direction, it holds that As&#x3e;Ap.

Axial gap motor with magnetically securely coupled stator cores and pump device

In a method for manufacturing an axial air-gap electronic motor, a plurality of core member and a plurality of dummy members are prepared, wherein each of the dummy members has a shape same as that of the core members. Then, the plurality of core members is arranged such that teeth surfaces of the core members face each other, and the dummy member is arranged between predetermined core members. Thereafter, a coil is wound from one end side toward the other end side of the core members through the dummy member continuously without cutting. A part of the coil corresponding to a transition wire set between the core members is wound on the dummy member.

Method for manufacturing an axial air-gap electronic motor

There is provided a method for manufacturing a stator core for an axial air-gap electronic motor, in which core sheets are laminatedly fixed while being shifted with predetermined intervals. The method includes a step in which first side surfaces in the circumferential direction (first slot surfaces) of the first to nth (n is a positive integer) core sheets are blanked out of a mother sheetby moving first blanking puncheswith predetermined intervals via a first control means; and a second blanking step in which second side surfaces in the circumferential direction (second slot surfaces) of the first to nth (n is a positive integer) core sheets are blanked in succession by moving a second blanking punchwith predetermined intervals via a second control means

Method for manufacturing a stator core for an axial air-gap electronic motor

In an electric rotary machine, a stator, a metallic supporting member configured to support the stator, and a rotor are provided, the rotor is relatively rotatably supported with respect to the stator, a magnetic path is formed via a gap portion between the stator and the rotor to give a torque to the rotor, and a space section is provided to interrupt the magnetic path at a position of the metallic supporting member near to a magnetic pole of the stator facing the gap portion.

Electric rotary machine

In an axial air-gap electronic motor in which a stator is formed by a plurality of core members, the manpower for assembling the core member is reduced, and the motor is assembled in a shorter period of time. A hook portion, which is a first connecting means, is projectingly provided at one end in the circumferential direction of a flange portionof each of the core membersto, and a columnar locking shaftto which the hook portionis locked is provided at the other end in the circumferential direction of the flange portion, by which the core memberstoare connected to each other.

Axial air-gap electronic motor

An axial air-gap electronic motor is arranged such that a teeth surface of a stator and a magnet surface of a rotor are arranged opposedly with a predetermined gap therebetween along an axis line direction of an output shaft of the rotor. The rotor has a rotor back yoke arranged coaxially with the stator, and a rotor magnet installed to the rotor back yoke so as to face the teeth surface of the stator. The rotor magnet is provided with an anchor magnet which is integral with the rotor magnet and is arranged on a back surface side of the rotor back yoke.

A gap surface () on which a circuit board () for driving control is mounted is provided between a first inner surface () and a second inner surface (), a tip end of a terminal pin () is projected in a part of the gap surface (), and further a first concave portion () formed by recessing surroundings of the terminal pin () in an axis line direction of the terminal pin is provided in the gap surface (). Thus, an electric motor can be assembled in a short period of time.

Electric motor

In an axial air-gap electronic motor having a stator that is formed by annularly connecting a plurality of core members around an axis of a rotor output axis, an insulator that insulates a winding portion of a stator core of each core member is formed in the winding portion in the shape of a bobbin having a pair of flanges, a winding draw-out portion is formed between abutted end portions of the flange, and a crossover wire of a winding is pulled out from the winding draw-out portion to outside the core member, whereby it is possible to positively perform routing treatment from the winding portion of the winding to the crossover wire and it is ensured that the crossover wire can be positively fixed without bringing a crossover wire of a different phase into contact.

A magnetic pre-pressurizing section for pre-pressurizing the inner ring of the bearing in the axial direction by a difference of magnetic forces of permanent magnets of the two rotors is arranged. The magnetic pre-pressurizing section is constructed by a difference of a magnetizing amount for forming permanent magnetsarranged in the respective rotors. The magnetic pre-pressurizing section is also constructed by a difference of distances of an air gap Lof a statorand a permanent magnet, and an air gap Lof the statorand a permanent magnet. The magnetic pre-pressurizing section is also constructed by a difference of thicknesses of the rotating axis direction of a permanent magnetand a permanent magnetarranged in the respective rotors.

Axial air gap type electric motor

In an axial air-gap electronic motor in which a teeth surface of a stator and a magnet surface of a rotor are arranged opposedly along the axis line direction of an output shaft of the rotor with a predetermined gap being provided therebetween, the stator has a plurality of core members connected in a ring form with the axis line being a center, and each of the core members is provided with a connecting device for connecting the teeth surfaces to each other in an opposed state. In order to shorten the wire winding time and reduce the assembling manpower for the core members, a stator is formed by connecting a plurality of core members in a ring form with the axis line being a center, and locking ribs are provided as connecting devices for connecting the core members to each other in a rod form along the axis line direction.

There is provided an axial air-gap electronic motor in which work for assembling a stator can be performed efficiently. A locking protrusionis provided on a flange portionof core memberstowhich are divided for each teethand are arranged in a ring form with the rotating shaft axis line being the center, and a connecting memberis fitted on the locking protrusionby which the core memberstoare connected to each other in a ring form.

An axial gap electronic motor includes a stator and a rotor disposed opposingly with a predetermined gap. In order to provide an easy assembling operation of the stator, the stator includes a plurality of pole members annularly connectable. The annular stator core is obtained by connecting each of the pole members to which coil winding is previously applied.

Axial gap electronic motor

An axial gap electronic motor includes a stator having a plurality of poles, and a rotor. Each pole is formed of a stator iron core made of a magnet body and a coil wound therearound. The rotor has a plurality of poles formed of permanent magnet and arranged along a rotation axis direction of said rotor with a predetermined gap provided therebetween. The stator has a magnetic force generating section in which a plurality of the stator iron cores is arranged in a ring shape on a concentric circle with the rotation axis line of the rotor being a center axis. Each of teeth of the stator iron core is provided with a skew.

In a method of manufacturing a rotor of an electric motor to be arranged inside a stator, a permanent magnet is formed in a ring-shape, and a rotating shaft and the permanent magnet are concentrically arranged in a mold. Then, a rubber material in a fluid state is poured into a space between the permanent magnet and the rotating shaft to vulcanize and mold a cushioning member having predetermined hardness. The permanent magnet and the rotating shaft are integrally coupled through the cushioning member.

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Kawasaki, Japan

Tomonori Kojima