Mitsubishi Electric Corporation

Kohei Samata

Norihiko Hana

Takeshi Nakamura

Takuma Sasai

Nobuaki Muroki

Ryutaro Kawaguchi

Provided are a magnetic gear device and a rotating electrical machine having intermediate cylindrical portions with increased rigidity against radial-direction external forces. In a magnetic gear device and a rotating electrical machine according to the present disclosure, an intermediate cylindrical portion includes: magnetic-pole portions arranged in a circumferential direction; frame-shaped spacers penetrating in the radial direction, arranged in the circumferential direction alternately with the magnetic-pole portions, and each having two side-wall portions contacting with the adjacent magnetic-pole portions; end plates provided at both ends of the magnetic-pole portions and the spacers in an axial direction of a rotary shaft; and reinforcement portions placed inside the spacers while being pressed to inner surfaces of the side-wall portions in the circumferential direction, to apply forces in the circumferential direction to the adjacent magnetic-pole portions via the spacer.

Magnetic gear device and rotating electrical machine

The present disclosure includes: a holding ring fitted to a rotor and holding a rotor coil of the rotor; and an interpolar jumper wire electrically connecting field poles of the rotor to each other, the interpolar jumper wire being composed of a flexible lead formed by stacking electrically conductive metal plates and a metal wire connected to the flexible lead. In a case where the flexible lead is divided, in terms of positions in a radial direction of the metal plates thereof, at half the number of all the stacked metal plates, an average value of plate thicknesses of metal plates that are disposed on an inner layer side is set to be smaller than an average value of plate thicknesses of metal plates that are disposed on an outer layer side.

Rotary electric machine

Provided an inspection method for a rotating electric machine, including: a first step of acquiring a first image by imaging a pattern formed on an outer peripheral surface of a retaining ring over an entire circumference of the retaining ring with use of an image pickup element mounted to a non-rotating portion of the rotating electric machine under a state in which the retaining ring is rotated; a second step of acquiring a second image by imaging the pattern over the entire circumference of the retaining ring with use of the image pickup element under the state in which the retaining ring is rotated, the second step being executed after the first step with an operation of the rotating electric machine interposed; and a third step of acquiring a distortion distribution of the retaining ring based on the first image and the second image.

Inspection method for rotating electric machine, rotating electric machine, and inspection system for rotating electric machine

In a rotary electric machine, a rotor including a rotor shaft and a rotor main body provided to the rotor shaft. A baffle plate, which is fixed at a plurality of positions to an end portion of the rotor main body in the axial direction, and is configured to define an airflow passage for cooling gas. Further, the baffle plate is segmented into a plurality of baffle segments which are arrayed in a circumferential direction of the rotor. The baffle segments each include an overlapping portion which overlaps an adjacent baffle segment in an axial direction of the rotor.

Growing community of inventors

Chiyoda-ku, Japan

Kohei Samata