Rotor, corresponding manufacturing method and electrical machine

摘要

The rotor has a short-circuit cage comprising a bar (20) with an end part (24) that is connected to a short-circuit crown (16) by a connection unit (30), where the unit is a complementary connection unit that retains the part relative to the crown in a retaining direction (S) extended radially relative to a rotation axis. The unit pre-stresses the part in a pre-stressed direction (P) having a radial component relative to the axis when the rotor does not rotate around the axis, where the pre-stressed direction is directed radially relative to the axis and opposed to the retaining direction. An independent claim is also included for a method for manufacturing a rotor.