Rotor of a permanently excited synchronous machine and permanently excited synchronous machine with such a rotor

A rotor of a permanently excited synchronous machine, the rotor comprising:

• a laminated core including essentially axial cut-outs which have pockets, retaining elements and flux barriers;
• permanent magnets inserted into the pockets;
• an end disc and/or distribution disc stacked on an end face of the laminated core and including at least one feed and at least one annular channel in communication with the at least one feed;
• a thixotropic potting compound fed via the at least one feed of the distribution disc and via the at least one annular channel into a space not taken up by the permanent magnets in the cut-outs at an infeed temperature of up to 60° C., in particular up to 30° C., at a flow rate of up to 10 mm per second and at a predefinable pressure of up to 10 bar, in particular 4.5 to 5 bar, until at least all axial gaps are filled or until the cut-outs are fully filled with the thixotropic potting compound;
• and
• a surface which is free from a lacquer layer or the potting compound.