Rotor for a generator, in particular a high-power turbogenerator

A rotor for a generator, the rotor comprising:

• a rotor body having axial ends;
• a plurality of slots running axially in the rotor body;
• a plurality of conductor bars, each disposed in a respective one of the slots and electrically connected to each other at each axial end of the rotor body in a rotor end winding;
• a plurality of wedges, each supporting a respective one of the conductor bars radially in the respective slot;
• a plurality of electrically insulating covering channels, each disposed in a respective one of the slots between a respective uppermost conductor bar and a respective wedge, and being formed with axially stepped ends at the ends of the rotor body;
• a rotor cap covering the rotor end winding at each axial end of the rotor body;
• a cap insulation disposed between the rotor end winding and the rotor cap and connected to the plurality of covering channels outside the rotor body, the cap insulation including at least one of a ring and a plurality of cap insulation segments formed towards the rotor body so as to fit onto the axially stepped ends of the covering channels, the rotor cap being disposed directly adjacent to the cap insulation.