Current transferring device for an electric machine and an electric machine with the same, and a vehicle

An electric machine comprising:

• a rotor having a rotor winding and a rotor shaft containing an inner cavity, the rotor winding having a rotor positive pole and a rotor negative pole;
• a rotary bearing member fixed in the inner cavity and configured to rotate with the rotor shaft, the rotary bearing member including a first compartment filled with a conducting fluid, the first compartment having a first opening and a rotor positive connector that is in electrical contact with the conducting fluid therein and electrically connected with the rotor positive pole,
• wherein the rotary bearing member further includes a second compartment filled with a conducting fluid and electrically insulated from the first compartment, the second compartment having a second opening and a rotor negative connector that is in electrical contact with the conducting fluid therein and electrically connected to the rotor negative pole,
• wherein the rotary bearing member further includes a non-rotary component including a power positive connector extending into the first compartment and being in electrical contact with the conducting fluid therein, and a power negative connector extending into the second compartment and being in electrical contact with the conducting fluid therein, and
• wherein the first opening and the second opening face opposite axial directions or a same axial direction.