Patent ID: 8836193
Filing Date: 2014-09-16
Classification: H02K,Y10T

Abstract:
1. A squirrel-cage rotor for an asynchronous machine, comprising: a laminated rotor core having slots; short-circuiting rings cast onto opposite end faces of the laminated rotor core and made of a first material having a specific electrical conductivity; conductors arranged in the slots and made of a second material having a specific electrical conductivity which is higher than the specific electrical conductivity of the first material, and a coating applied upon a surface of the conductors by electrochemical galvanizing and made of a coating material which is the first material, said coating adjoining the second material of the conductors via a first alloy layer made of the second material and the coating material, and adjoining the cast via a second alloy layer made of the first material and the coating material, wherein the first material is aluminum and the second material is copper, and wherein the coating and the first alloy layer are produced by electrochemical galvanizing providing an optimum electrical transition conductivity between the first and the seconds materials.