Electric charging device with rotor cooling

A charging device (10) for an internal combustion engine, comprising:

• a shaft (100);
• a compressor wheel (600) mounted on the shaft (100);
• a stator housing (200), wherein the stator housing (200) is liquid cooled;
• a stator (300), wherein the stator (300) is arranged in the stator housing (200);
• a rotor (400) arranged rotatably fixed on the shaft (100), wherein the rotor (400) is surrounded by the stator (300);
• and
• a first fan device (500), wherein the first fan device (500) is arranged for common rotation with the shaft (100) in order to generate an air flow circulating in a closed loop in the stator housing (200) for cooling the rotor (400), and
• wherein circulating air flow generated by the first fan device (500) runs the full length of the rotor (400) in a first axial direction between the rotor (400) and the stator (300), is then guided radially outward, and then is guided back in an opposite axial direction the full length of the rotor (400) (a) between the stator (300) and the liquid cooled stator housing (200) and/or (b) axially through the liquid cooled stator housing (200), and
• is then returned to flow again the full length of the rotor (400) in the first axial direction between the rotor (400) and the stator (300).