A motorized drive system, in particular for actuating a door, comprising a. at least one gear module comprising a spindle axis and a drive axis, the gear module being designed to translate a rotational movement about the drive axis into a rotational movement about the spindle axis, b. at least one spindle assembly comprising a threaded spindle rotatable about the spindle axis, the threaded spindle being mechanically coupled to a part of the gear assembly rotatable about the spindle axis, and c. at least one drive assembly for driving the threaded spindle with a drive shaft, the drive shaft being mechanically coupled to a part of the transmission assembly rotatable about the drive axis, wherein the at least a drive assembly comprises d. at least one motor assembly for driving a rotary movement of the threaded spindle about the spindle axis comprising a motor shaft rotatable about the drive axis and rigidly connected to the drive shaft, and e. at least one brake assembly arranged on a side of the motor assembly facing the transmission assembly for braking a rotary movement of the threaded spindle about the spindle axis comprising a brake shaft that is rotatable about the drive axis and connected rigidly to the motor shaft, the brake assembly comprising a hysteresis brake, characterized in that f. the motor assembly comprises an angular position sensor for measuring an angular position of the motor shaft relative to the motor assembly, wherein the angular position sensor is arranged on a side of the motor assembly facing away from the brake assembly, g. wherein the spindle axis and the drive axis are not arranged coaxially, and the drive assembly is arranged to the side of the spindle axis, wherein the spindle axis and the drive axis form an angle (α) that amounts to from 45° to 90°. a. at least one gear module comprising a spindle axis and a drive axis, the gear module being designed to translate a rotational movement about the drive axis into a rotational movement about the spindle axis, b. at least one spindle assembly comprising a threaded spindle rotatable about the spindle axis, the threaded spindle being mechanically coupled to a part of the gear assembly rotatable about the spindle axis, and c. at least one drive assembly for driving the threaded spindle with a drive shaft, the drive shaft being mechanically coupled to a part of the transmission assembly rotatable about the drive axis, wherein the at least a drive assembly comprises d. at least one motor assembly for driving a rotary movement of the threaded spindle about the spindle axis comprising a motor shaft rotatable about the drive axis and rigidly connected to the drive shaft, and e. at least one brake assembly arranged on a side of the motor assembly facing the transmission assembly for braking a rotary movement of the threaded spindle about the spindle axis comprising a brake shaft that is rotatable about the drive axis and connected rigidly to the motor shaft, the brake assembly comprising a hysteresis brake, characterized in that f. the motor assembly comprises an angular position sensor for measuring an angular position of the motor shaft relative to the motor assembly, wherein the angular position sensor is arranged on a side of the motor assembly facing away from the brake assembly, g. wherein the spindle axis and the drive axis are not arranged coaxially, and the drive assembly is arranged to the side of the spindle axis, wherein the spindle axis and the drive axis form an angle (α) that amounts to from 45° to 90°.