Toyota Jidosha Kabushiki Kaisha

Aisin Aw Co., Ltd.

Denso Corporation

Aisin Seiki Kabushiki Kaisha

Tomohiro Inagaki

Shinya Sano

Shinichi Otake

Ken Takeda

Tsuyoshi Miyaji

Yuta Watanabe

Ryosuke Utaka

Satoru Wakuta

Masatoshi Adachi

Kinya Yoshii

Kazutoshi Motoike

Takeshi Tomonaga

Junji Matsushita

Takuya Komatsu

Katsutoshi Shimizu

Akifumi Kurokawa

A rotor () for a rotary electric machine has a plurality of magnetic poles () provided at intervals, in a circumferential direction, at the outer periphery of a rotor core (). Each of the magnetic poles () has a first permanent magnet () buried in the center of the magnetic pole, and a pair of second permanent magnets () that are buried on both sides of the first permanent magnet () in the circumferential direction, and that are disposed such that a mutual spacing between the pair of the second permanent magnets () becomes narrower inward in the radial direction. A narrowest spacing between the pair of second permanent magnets () is set to be wider than a longitudinal-direction width of the first permanent magnet () in a magnetic path region () that is defined by the first permanent magnet () and the pair of second permanent magnets ().

Rotor for the electric machine

In a rotor for a rotary electric machine, a plurality of magnetic poles are provided in a radially outer portion of the rotor iron core, at intervals in the circumferential direction. Each magnetic pole includes a pair of permanent magnets disposed apart from each other in the circumferential direction, and a magnetic flux-restraining hole that is formed and extended radially inwardly between radially inner end portions of the permanent magnets and that restrains flow of magnetic flux. The magnetic flux-restraining hole is extended so as to project beyond a position of the radially inner end portions to a radially outer side, between the pair of permanent magnets.

Rotor for rotary electric machine having a magnetic flux-restraining hole

A rotary electric machine configured with a stator, rotor, and permanent magnets disposed in an inverted V-shape that becomes gradually narrower from a side of a center of rotation of the rotor. The rotor is provided with a plurality of support portions that extend radially about the center of rotation, and gap portions are respectively formed in correspondence with the plurality of support portions at positions spaced by a predetermined distance from an edge portion of the permanent magnets in a flowing direction of magnetic flux between the permanent magnets and the stator. The gap portions are formed to have such a length that causes magnetic saturation during generation of low torque in a low-current state and that causes no magnetic saturation during generation of maximum torque in a high-current state in which electricity at a high current is supplied to the stator coil.

Rotary electric machine with improved energy efficiency

A planetary gear train includes a carrier having a first side plate, a second side plate disposed in parallel to the first side plate and pinions rotatably supported by the first and second side plates; and a ring member secured to an outer edge of the second side plate. The first side plate has a plurality of first convex portions whose edge portion form an outer edge and a plurality of first concave portions formed between adjacent first convex portions. The second side plate has a plurality of second convex portions whose edge portion form an outer edge and whose width in a peripheral direction is wider than the first convex portion, and a plurality of carrier bridges axially extended from a part between the plurality of second convex portions to the plurality of first concave portions and secured to the first concave portion.

Planetary gear train and driving unit having the same

Growing community of inventors

Nishio, Japan

Tomohiro Inagaki