Totally enclosed electrical machine - has inner ventilators at ends of rotor shaft creating circulation of cooling medium in cooling channels in rotor plate packages

摘要

The machine (1) includes a rotor. An inner ventilator (12) is arranged on both ends of the rotor shaft (8). Rotor cooling channels (22) are arranged in the rotor plate packages (2) and extend along the full axial length of the rotor plate packages. The conveying effect from the inner ventilator to the cooling medium in the rotor cooling channels is reduced at one end of the rotor to a section of the rotor cooling channel in the one conveying direction and at the other end of the rotor for another section of the rotor cooling channel in the other conveying direction. ADVANTAGE - Despite reduced manufacturing cost, enables temperature equalisation between drive side and non-drive side.