Toyota Jidosha Kabushiki Kaisha

Hazuki Kawamura

Masashi Matsumoto

Kohei Watanabe

Haruki Kusamaki

Yuki Tanaka

Hiroshi Inano

Tomoyuki Sawada

First-fourth slots may be provided in an inner circumferential surface of a stator core. A coil may include first-third segments conductor. Each of the conductors may include a U-shape. The first segment conductor may be inserted in the first slot and the second slot in a state where a coupling portion of the first segment conductor is located at a position facing a first end surface. The second segment conductor may be inserted in the second slot and the third slot in a state where a coupling portion of the second segment conductor may be located at a position facing a second end surface. The third segment conductor may be inserted in the third slot and the fourth slot in a state where a coupling portion of the third segment conductor may be located at a position facing the first end surface.

Stator and manufacturing method thereof

A cooling system is provided. Coil ends protrude outward from a first end of a stator core in a direction along a central axis. An imaginary straight line is orthogonal to both of a central axis of a core body and an axis extending in an up-down direction. Half the coil ends above the imaginary straight line are in a first portion. Each of the segment coils in the first portion includes an outer peripheral surface that faces in a direction opposite from the central axis. The outer peripheral surface of each of the segment coils includes a twisted surface. The direction in which the twisted surface faces becomes closer to the direction facing the stator core as the twisted surface extends toward the first end of the stator core.

Cooling system, stator for rotating electric machine, and segment coil

A method of manufacturing a coil includes a preparation step of preparing a copper wire, a winding step of winding a plurality of aluminum wires around the copper wire, and a pressing step of pressing the copper wire and the plurality of aluminum wires so as to form an aluminum coat around the copper wire and form an anodized aluminum film on the surface of the aluminum coat.

Method of manufacturing coil

Disclosed are: preparing a rotor core having a plurality of magnet holes spaced near a circumferential edge of the rotor core; preparing a plurality of permanent magnet units each including a porous body and a magnet main body disposed in contact with each other; and inserting the permanent magnet units into the magnet holes and securing the permanent magnet units in the magnet holes.

Method of manufacturing rotor

A rotary electric machine includes a stator core having a plurality of teeth arranged in a row along a circumferential direction of the stator core, and a stator coil composed of a winding wire wound around the teeth. The stator coil includes coil end portions extending, outside the stator core in an axial direction thereof, along a substantially circumferential direction of the stator core, and straight portions extending along the axial direction, the straight portions being at least partially housed in a slot which is a void defined by two adjacent teeth of the plurality of teeth. In the rotary electric machine, a cooling groove is formed at least in the straight portion, the cooling groove functioning as a cooling channel through which a cooling fluid flows, and each straight portion includes only one cooling channel.

Growing community of inventors

Nisshin, Japan

Hazuki Kawamura