ROTOR FOR SQUIRREL-CAGE INDUCTION MOTOR AND MANUFACTURE THEREOF

• Main Authors: KO SATORU, MURATA AKIRA, KATO HIROYOSHI
• Format: Patent
• Language: English
• Published: 06.10.1989
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; ELECTRICITY; GENERATION

PURPOSE:To obtain characteristics demanded by a consumer at a low cost and easily, by making a part if the conductor part of Al die casting type rotor into a non-die casting conductor part having a conductivity different from that of Al. CONSTITUTION:A slot 1a has no opening and is formed into a fan shape where a slot width becomes narrower to the lower side. A bar conductor part 4A is composed of, for example, a copper bar, its peripheral face is partially in contact with the upper bottom part of said slot 1a, and its both ends are so positioned as to protrude outwardly from the slot 1a. An Al conductor part 4B occupies a part excepting that occupied by said bar conductor part 4A out of a space within the slot 1a. When the copper bar 4A is merely inserted from one end side of an iron core 1 into the upper part of said slot 1a at the time of forming of said conductor part 5, the conductor part 5 is positioned in the upper part to define a space together with the lower part side of said slot 1a. Then, said space is filled with Al and a short-circuit ring 3 is formed therein by the Al die casting method or the centrifugal casting method known heretofore.