Kabushiki Kaisha Toshiba

Toshiba Industrial Products Manufacturing Corporation

Yoshio Hashidate

Kazuto Sakai

Masanori Arata

Mikio Takabatake

Tadashi Tokumasu

Yosuke Nakazawa

Ryoichi Kurosawa

Norio Takahashi

Yutaka Hashiba

Masakatsu Matsubara

Takashi Hanai

Yasuo Hirano

Wataru Ito

Shiro Amemori

Koji Oishi

Included are a ring-shaped stator and a ring-shaped rotor arranged inside the stator; the stator includes a stator core with armature windings; the rotor includes a rotor core in which a plurality of permanent magnets are inserted and cooling holes are formed, a coolant flowing in each of the cooling holes; and each of the cooling holes is formed so as to have a sectional view which is a convex toward the outer periphery thereof.

Rotating electrical machine

A reluctance type rotating machine includes a stator having armature windings arranged on an inner periphery of the stator , a rotor having a magnetic unevenness in the circumferential direction and a plurality of permanent magnets arranged for negating the armature windings' flux passing between adjoining poles. Each magnet is magnetized in a direction different from a direction to facilitate the rotor's magnetization. A magnetic portion is provided between the pole and the interpole of the rotor . Owing to the provision of the magnetic portion , when the armature windings are not excited, more than 30% of the permanent magnets' flux is distributed in the rotor . Similarly, when the machine is loaded, the permanent magnets' interlinkage flux is more than 10% of composite interlinkage flux composed of armature current and the permanent magnets.

Reluctance type rotating machine with permanent magnets

A reluctance type rotating machine includes a stator having armature windings arranged on an inner periphery of the stator a rotor having a magnetic unevenness in the circumferential direction and a plurality of permanent magnets arranged for negating the armature windings' flux passing between adjoining poles. Each magnet is magnetized in a direction different from a direction to facilitate the rotor's magnetization. A magnetic portion is provided between the pole and the interpole of the rotor Owing to the provision of the magnetic portion when the armature windings are not excited, more than 30% of the permanent magnets' flux is distributed in the rotor Similarly, when the machine is loaded, the permanent magnets' interlinkage flux is more than 10% of composite interlinkage flux composed of armature current and the permanent magnets.

A reluctance type rotating machine includes a stator,having armature windings,arranged on an inner periphery of the stator,a rotor,having a magnetic unevenness in the circumferential direction and a plurality of permanent magnets,arranged for negating the armature windings' flux passing between adjoining poles. Each magnet,is magnetized in a direction different from a direction to facilitate the rotor's magnetization. A magnetic portion,is provided between the pole and the interpole of the rotor,Owing to the provision of the magnetic portion,when the armature windings are not excited, more than 30% of the permanent magnets' flux is distributed in the rotor,Similarly, when the machine is loaded, the permanent magnets' interlinkage flux is more than 10% of composite interlinkage flux composed of armature current and the permanent magnets.

A rotor is provided for a permanent magnet type rotating machine having a stator,with armature windings,. The rotor,includes a rotor core,and a plurality of permanent magnets,arranged in the rotor core,so as to negate magnetic flux of the armature windings,passing through interpoles,. The rotor,is constructed so that the average of magnetic flux in an air gap,between the rotor,and the stator,, which is produced by the permanent magnets,at the armature windings' de-energized, ranges from 0.1 &lsqb;T&rsqb; to 0.7 &lsqb;T&rsqb; and the ratio (Lq/Ld) of self-inductance of the magnetic portion in a hard-magnetizing direction (q-axis) to self-inductance in an easy-magnetizing direction (d-axis) under a rated load condition ranges from 0.1 to 0.8. Under these conditions, it is possible to realize the rotating machine which operates as an induction machine at the machine's starting and also operates as an synchronous machine at the rated driving due to smooth pull-in.

Rotor for permanent magnet type rotating machine

Growing community of inventors

Kanagawa-ken, Japan

Yoshio Hashidate