Kabushiki Kaisha Toshiba

Toshiba Infrastructure Systems & Solutions Corporation

Hiroaki Makino

Makoto Matsushita

Hideki Hisada

Hidenori Uchida

Masakatsu Matsubara

Daisuke Misu

Katsutoku Takeuchi

Minoru Awazu

Mikio Takabatake

Takahiro Toi

Fumiaki Ito

Kazuya Yasui

Masaru Kano

According to one embodiment, a rotor includes a rotor core including magnetic poles arranged in a circumferential direction around a central axis, each magnetic pole including magnet holder slots each of which includes an opening end opened to an outer circumference of the rotor core, a first core portion between adjacent magnet holder slots, a second core portion between the magnet holder slots and the central axis, and a bridge connecting the first core portion and the second core portion, permanent magnets within the respective magnet holder slots, and a non-magnetic filling material filled into a cavity between the permanent magnet and the opening end in the magnet holder slot and joined to the permanent magnet and an inner wall of the magnet holder slot.

Rotor of rotary electric machine

According to one embodiment, a stator includes a stator core with slots, and multi-phase segment coils each including coil segments each including a first linear part and a second linear part arranged in different slots and a bridge part, the coil segment formed of a rectangular conductor. An innermost coil segment in the slot is structured with divided segments adhered together. Each divided segment includes a first linear part and a second linear part, and a bridge part, and is formed of a rectangular conductor cross-sectional area of which is smaller than the rectangular conductor of other coil segments. The bridge parts of the divided segments are arranged to cross each other in the radial direction.

Stator of rotary electric machine

According to one embodiment, a rotor includes a rotor core including magnetic poles arranged in a circumferential direction around a central axis, each magnetic pole including at least two magnet holding slots opposed to each other at intervals in the circumferential direction, a first core portion between the two magnet holding slots, a second core portion between the two magnet holding slots and the central axis, and a bridge connecting the first core portion and the second core portion, and permanent magnets each arranged in the magnet holding slot. The bridge includes first center bridges located between the two magnet holding slots and separated from each other in the circumferential direction, and a coupling element that connects the first center bridges to each other.

According to one embodiment, a first permanent magnet and a second permanent magnet are disposed in each magnetic pole of a rotor core. When angular coordinates of intersections of a flux line in a d-axial direction passing an outer end Aof the first permanent magnet, a flux line in the d-axial direction passing through an inner end Aof the first permanent magnet, a flux line in the d-axial direction passing an outer end Bof the second permanent magnet, a flux line in the d-axial direction passing an inner end Bof the second permanent magnet and a circumscribing circle of the rotor core are respectively defined as θ, θ, θand θ, the θ, θ, θand θsatisfy a formula (−34/p<(θ-θ)<22/p, −34/p<(θ−θ)<22/p).

Permanent magnet rotary electric machine including flux barriers shaped along flux lines

Growing community of inventors

Fuchu, Japan

Hiroaki Makino