US Patent No. 9,071,112

SQUIRREL-CAGE ROTOR AND PRODUCTION METHOD THEREOF


Patent No. 9,071,112
Issue Date June 30, 2015
Title Squirrel-cage Rotor And Production Method Thereof
Inventorship Hisashi Maeda, Yamanashi (JP)
Masamoto Fukuda, Yamanashi (JP)
Takafumi Kajiya, Yamanashi (JP)
Assignee FANUC CORPORATION, Yamanashi (JP)

Claim of US Patent No. 9,071,112

1. A squirrel-cage rotor, comprising:
a core;
a plurality of slot holes formed in the core and extending along a rotation axis of the core;
conductive bars arranged in the slot holes; and
a pair of conductive end rings arranged at both ends of the core defined in relation to a direction of the rotation axis of
the core and connected to each other by the conductive bars,

wherein the slot holes are opened at an outer periphery surface of the core, the conductive bars are formed by a coating material
which is formed by spraying solid-state conductor particles into the slot holes from the side of the outer periphery surface
of the core, and

wherein at least one of the pair of conductive end rings is configured by a coating material which is formed by a cold spraying
process in which solid-state conductor particles are sprayed.