Abstract: A mill drive system with a transmission arranged beneath a milling table and with at least one planetary and/or spur gear stage as well as a vertical shaft position is provided. In addition, an electric motor is integrated in a housing of the transmission and is connected to a lubricant supply circuit of the transmission. A rotor and a stator of the electric motor have vertically extending axes. Cooling of the motor is performed by a lubricant circulating through the transmission. Furthermore, a lubricating-oil-proof sheath for rotor and/or stator windings of the electric motor for sealing with respect to the lubricant is provided. In addition, the mill drive system includes a converter with a regulation device for backlash-free speed regulation of the electric motor.

Abstract: A mill drive system with a transmission arranged beneath a milling table and with at least one planetary and/or spur gear stage as well as a vertical shaft position is provided. In addition, an electric motor is integrated in a housing of the transmission and is connected to a lubricant supply circuit of the transmission. A rotor and a stator of the electric motor have vertically extending axes. Cooling of the motor is performed by a lubricant circulating through the transmission. Furthermore, a lubricating-oil-proof sheath for rotor and/or stator windings of the electric motor for sealing with respect to the lubricant is provided. In addition, the mill drive system includes a converter with a regulation device for backlash-free speed regulation of the electric motor.