Mitsubishi Electric Corporation

Hiroko Ueyama

Masatsugu Nakano

Yu Hirotani

Ryuichi Takiguchi

Satoru Akutsu

Kazumasa Ito

Yuji Takizawa

Tetsuya Iwata

A permanent magnet motor includes: a stator including: a stator core in which teeth are respectively arranged circumferentially so as to protrude radially inward from an annular core back; an armature winding that is mounted to the stator core; and a frame that holds the stator core in an internally fitted state; and a rotor that includes a rotor core and permanent magnets, the armature winding being constituted by a plurality of coils that are respectively wound so as to be concentrated on the teeth, wherein: inner circumferential ends of adjacent teeth are connected together by a connecting portion; and 0.122&#x2266;(t2+t3)/r4&#x2266;0.202 is satisfied, where t2 is a thickness of the core back, t3 is a thickness of the frame, and r4 is an outside radius of the frame.

Permanent magnet motor and driving apparatus-integrated permanent magnet motor

In a rotary electric machine, when armature coil bodies of respective phases in which first and second armature windings, are both wound around 6 k&#xd7;n teeth are set as Ua, Va, and Wa, armature coil bodies of respective phases in which only the first and armature winding is wound around 6 m&#xd7;n teeth are set as Ub, Vb, and Wb, and armature coil bodies of respective phases in which only the second armature winding is wound around 6 m&#xd7;n teeth are set as Uc, Vc, and Wc, Ua, Va, Wa, Ub, Vb, Wb, Uc, Vc, and Wc are respectively arranged so as to exhibit 2 n-fold rotational symmetry about an axial center of a rotor.

Rotary electric machine and electric power steering device using rotary electric machine

Provided is a rotary electric machine, including: a stator; and a rotor provided on the stator so as to be rotatable about a rotation shaft, in which the rotor includes, at an outer circumference thereof, magnetic poles arranged so as to have different polarities alternately, the magnetic poles being formed of a rotor core in which electromagnetic steel plates are stacked, the magnetic poles being excited by permanent magnets which are housed in gaps disposed at an outer circumferential part of the rotor core, and in which the rotor core includes, at an inner circumferential part thereof, in the same stack plane: a short circuit magnetic path connecting magnetic pole pieces which form the magnetic poles; and a protruding portion held in contact with the permanent magnets, which is positioned between magnetic pole pieces which are not connected to the short circuit magnetic path.

Rotary electric machine

Growing community of inventors

Chiyoda-ku, Japan

Hiroko Ueyama