Komatsu Corporation

Natsuki Watanabe

Teiichirou Chiba

Hiroyuki Tokunaga

Akira Okabe

Yasuhiko Matsuki

Kazuhiro Okamoto

Ryo Ono

A motor includes: an annular stator attached in a housing; a rotor that is disposed in the stator and is rotatably supported by the housing; and a plurality of permanent magnets embedded in a rotor core of the rotor, in which the rotor core has embedding holes respectively in which the permanent magnets are fitted, and each of the embedding holes is formed with filling holes each continuous in an axial direction of the rotor core at diagonal positions of each of the permanent magnets.

Electric machine

A motor cooling structure for cooling a motor, which includes a shaft transmitting power and a rotor core attached to an outside of the shaft, by a cooling medium, includes: a cooling medium supply passage that extends to an inside of the shaft in an axial direction of the shaft and passes the cooling medium through the cooling medium supply passage; and a plurality of cooling medium passages that are branched from the cooling medium supply passage to cool the rotor core while flowing the cooling medium without branching the cooling medium in the axial direction and then eject the cooling medium from a plurality of ejection holes opened to a surface of the rotor core, wherein distances from a cooling medium inlet, through which the cooling medium flows into the cooling medium supply passage, to the respective ejection holes are equal between the plurality of cooling medium passages.

Motor cooling structure and motor

An electrical motor that includes a circular stator attached to an inner side of a housing and a rotor disposed at an inner side of the stator in a radial direction, the electrical motor includes: a terminal connected to a power supply cable drawn from a coil of the stator; a terminal box that is attached to the housing and stores the terminal; and an insulating material that is disposed between the terminal box and the terminal and separable from the terminal.

Growing community of inventors

Hiratsuka, Japan

Natsuki Watanabe