Hitachi, Ltd.

Hitachi Astemo Ltd.

Tetsuya Suto

Akeshi Takahashi

Makoto Ito

Kenichi Nakayama

Noriyuki Maekawa

Akihiro Namba

Keisuke Takeuchi

Ryuuichirou Iwano

A stator of a rotary electrical machine includes a stator core, a coil, and at least one of a connection wire and a jumper wire. The coil has a first coil end which is located on one end side of the stator core in the axial direction and a second coil end which is located on the other end side of the stator core in the axial direction. A coolant flow path for cooling the rotor and the stator has: a coolant inflow port; a first annular flow path which faces an air gap in the axial direction; a relay flow path which is provided on the second coil end side and which faces the air gap in the axial direction; and a second annular flow path which is in communication with the relay flow path and which is provided as shifted radially outward with respect to the air gap.

Rotary electrical machine

A rotating electric machine having high efficiency and high reliability without causing an increase in size and cost is realized. Each of the rectangular wire segment coils has a first region portion and a second region portion connected to the first region portion and formed in the circumferential direction. Adjacent pairs of wire coils include a conductive portion to which the first region portion of one of the rectangular wire segment coils and the second region portion of the other of the rectangular wire segment coils are connected. Each of the plurality of layers includes a first layer in which the first region portion appears at an axial end portion and a second layer in which the second region portion appears at an axial end portion when the coil end is viewed in an axial direction of the rotating electric machine.

Rotating electric machine and method for manufacturing rotating electric machine

High reliability and long life are achieved by being sliding-less. The switch according to the present invention includes: first terminal and a second terminal that are adjacently attached to a stator; a movable shaft movable in a first direction and a second direction, a plurality of movers attached to the movable shaft; and a movable segment that is connected to two of the plurality of movers and biases the two movers in a direction in which they are away from each other. The switch is capable of switching among: a first mode in which when the movers move in the first direction, the mover is pushed by the stator to deform the movable segment so as to protrude toward the terminal, and the movable segment comes into contact with the first terminal; an intermediate mode in which deformation of the movable segment by the movers is released, and the movable segment is in contact with neither the first terminal nor the second terminal; and a second mode in which when the movers move in the second direction, the mover is pushed by the stator to deform the movable segment so as to protrude toward the terminal, and the movable segment comes into contact with the second terminal.

Switch and winding switching device

Electric motor

Growing community of inventors

Tokyo, Japan

Tetsuya Suto