| 摘要 |
In a drive system (10) for a ball mill (2) driven by a motor (12) with a slip-ring rotor, wherein the motor (12) is assigned a family of characteristics (36) relating the torque (M) of the motor to a further characteristic variable (D), the family of characteristics (36) has at least two different characteristics (40a-e, 42), and it includes a switching element (20) that switches over the drive system (10) abruptly between the two characteristics (40a-e, 42) when there is a constant value of the characteristic variable (D). In a method for operating a ball mill (2) with a drive system (10), a drum (6) of the ball mill (2) is moved out of a state of rest (R) when the first characteristic (40a-e) is activated; in the event of caking (34) in the drum (6) of the ball mill (2), it is moved until the caking (34) is in an inclined position (S1-2); actuation of the switching element (20) brings about switching over to the second characteristic (42). |
