Electrically excited synchronous machine

An electrically excited synchronous machine, comprising:

• a stator, having a stator housing including at least one axially front-side bearing shield and a stator coil for generating a magnetic stator field,
• a rotor, having a rotor shaft rotatably mounted at least on the bearing shield about an axis of rotation and a rotor coil for generating a magnetic rotor field,
• an energy transmission system including an energy transmitter for transmitting electrical energy to the rotor coil and at least one stator-fixed component arranged rotationally fixed manner in or on the bearing shield to transmit heat, wherein the energy transmitter is designed for the inductive transmission of electrical energy and has a rotary transformer including a stator-fixed primary transformer coil and including a rotor-fixed secondary transformer coil,
• the bearing shield includes at least one coolant duct having a coolant inlet and a coolant outlet, the bearing shield is actively cooled by a coolant guided through the coolant duct,
• the energy transmitter has a stator-fixed ferrite core arranged concentrically to the axis of rotation and in which the primary transformer coil is arranged in a stationary manner and the secondary transformer coil in a rotatable manner,
• the ferrite core is arranged in a rotationally fixed manner in or on the bearing shield to transmit heat,
• the coolant duct runs radially outside of the ferrite core in the bearing shield,
• the ferrite core is arranged concentrically in the cooling region,
• the bearing shield has a receptacle, in which the ferrite core is arranged,
• the receptacle has an enclosure, the radial inner contour of which is adapted to a radial outer contour of the ferrite core, and
• the coolant duct extends at least partially through the enclosure in the circumferential direction.