Rotor assembly, and synchronous machine including the rotor assembly

A rotor assembly for an inductively electrically excited synchronous machine, comprising:

• a hollow shaft rotatable about an axis of rotation, the hollow shaft including a cavity;
• a rotor connected in a rotationally fixed manner to the hollow shaft;
• a secondary-side circuit of an energy transmitter, the secondary-side circuit connected in a rotationally fixed manner to the hollow shaft, the secondary-side circuit including a rectifier and a secondary coil;
• wherein the rectifier is aligned transversely to the axis of rotation and divides the cavity of the hollow shaft into (i) a cooling chamber and (ii) a transmission chamber;
• and
• wherein the rectifier includes a printed circuit board, at least one electrical component part fastened to a first side of the printed circuit board, and a cooling body abutting an opposite, second side of the printed circuit board.

A rotor assembly for an inductively electrically excited synchronous machine, comprising:

• a hollow shaft rotatable about an axis of rotation, the hollow shaft including a cavity;
• a rotor connected in a rotationally fixed manner to the hollow shaft;
• a secondary-side circuit of an energy transmitter, the secondary-side circuit connected in a rotationally fixed manner to the hollow shaft, the secondary-side circuit including a rectifier and a secondary coil;
• wherein the rectifier is aligned transversely to the axis of rotation;
• wherein the rectifier includes a printed circuit board, at least one electrical component part fastened to a first side of the printed circuit board, and a cooling body abutting an opposite, second side of the printed circuit board;
• and
• wherein the cooling body includes an engagement formation configured to receive at least a portion of a shaft of a primary-side circuit of the energy transmitter.