Toyota Jidosha Kabushiki Kaisha

Hisamitsu Toshida

Kazuaki Haga

Akira Yamashita

Motoki Hiraoka

Daisuke Ichigozaki

Keiu Kanada

Kensuke Komori

Kyoko Nakamura

Daichi Maruyama

A rotating electrical machine capable of obtaining a higher torque while limiting the amount of permanent magnets used. A magnetic pole of a rotor includes an auxiliary magnet embedded in a rotor core and at least one main magnet arranged on an outer circumferential side than the auxiliary magnet of the rotor. In each magnetic pole, the distance from an end of the main magnet, the end facing the auxiliary magnet, to the auxiliary magnet facing the main magnet is shorter than the length of the main magnet in the radial direction. In a cross-section orthogonal to the rotation axis of the rotating electrical machine, the main magnets of each magnetic pole are arranged so as to be asymmetrical about a virtual line passing the rotation axis and axisymmetrically dividing the auxiliary magnet.

Rotating electrical machine

Provided is a stator for rotating electrical machine that can avoid the sagging of teeth stacked at the distal ends under the self-weight. A stator core is a laminate of metal foil members stacked in a direction of a rotation axis of the rotating electrical machine. Each tooth has a pair of side walls facing the neighboring teeth in the circumferential direction. The stator includes a pair of insulating reinforcing members so as to become a bridge between the corresponding tooth and a part of the yoke and sandwich the corresponding tooth from both sides in the direction of the rotation axis while exposing the pair of side walls; insulating fixing members, each fixing member fixing the corresponding pair of reinforcing members to the corresponding tooth while wrapping around the pair of reinforcing members and tooth; and coils formed as distributed windings at the teeth fixed with the fixing members.

Stator for rotating electrical machine having components for reinforcing laminations

There are provided a crack determining device capable of determining, in real time and with precision, the fact that a crack has occurred in a solder layer, and a semiconductor device comprising same. A crack determining device of the present invention is a crack determining device that determines whether or not a crack has occurred in a solder layer with respect to a semiconductor device in which at least a semiconductor element is connected to a connectee member via the solder layer, the crack determining device comprising a generation part that generates a magnetic field and that is fixed to a member forming the semiconductor device, and a detection part that detects a magnitude of a magnetic field and that is disposed within the solder layer, wherein the magnetic field generated at the generation part is detected at the detection part, and it is determined that a crack has occurred in the solder layer if this magnitude of the magnetic field varies from a magnitude of the magnetic field detected before the crack occurred.

Crack determining device and semiconductor device

Growing community of inventors

Toyota, Japan

Hisamitsu Toshida