Drive device for use in a laboratory device

Abstract

The invention relates to a drive device () for use in a laboratory device, having a stepping motor () having rotor and stator, and having a motor controller (), which is designed for the purpose of activating the stepping motor (). In one embodiment, the drive device () comprises an encoder (), which supplies a respective current encoder signal (e(t)) in operation (ia, ib), which reflects the current rotor position of the rotor, and phase terminals (), to tap the currently flowing motor phase currents (ia, ib). The motor controller () comprises a transformation module (), in order to decompose the currently flowing motor phase currents (ia, ib) using a transformation method into a slip component (ix) and a torque component (iy). Furthermore, it comprises a slip regulation module (), to which the slip component (ix) and a first target value (ix*) are supplied as input variables, and a torque regulation module (), to which the torque component (iy) and a second target value (iy*) are supplied as input variables. The slip regulation module () and the torque regulation module () predefine the rotor phase currents (ia, ib) so that the difference between the slip component (ix) and the first target value (ix*) and the difference between the torque component (iy) and the second target value (iy*) are minimal.