COOLING SYSTEM FOR AN ELECTRIC MOTOR, AND A DRIVE SYSTEM FOR DRIVING AN IMPELLER

摘要

The present invention relates to a cooling system for an electric motor with housing and a motor shaft (3), and where an impeller (1) is rotated by the motor shaft (3) for pumping a cooling fluid through at least one cooling circuit in the motor. At least one magnet (2) is connected to the motor shaft (3) and at least one magnet (5) is connected to the impeller (1). The at least two magnets are placed in close proximity each other. A shield (6) is placed between the magnet (2) connected to the shaft and the magnet (5) connected to the impeller, sealing the cooling circuit from the motor interior. Furthermore a drive system with a drive unit (4) for driving an impeller is described.