Drive device for use in a laboratory device

摘要

The invention relates to a drive device (100) for use in a laboratory device, having a stepping motor (10) having rotor and stator, and having a motor controller (20), which is designed for the purpose of activating the stepping motor (10). In one embodiment, the drive device (100) comprises an encoder (11), 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 (14, 27), to tap the currently flowing motor phase currents (ia, ib). The motor controller (20) comprises a transformation module (13), 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 (15), to which the slip component (ix) and a first target value (ix*) are supplied as input variables, and a torque regulation module (16), to which the torque component (iy) and a second target value (iy*) are supplied as input variables. The slip regulation module (15) and the torque regulation module (16) 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.

主权项

1. A drive device being designed for a laboratory device, comprising
a motor with rotor and stator; a position acquisition means; a plurality of phase terminals; and a motor controller, arranged for controlling the motor, comprising a transformation module, a slip regulation module connected to the position acquisition means, and a torque regulation module connected to the position acquisition means, wherein the motor controller further comprises a non-transient computer readable medium programmed with a computer software to control one or more digital signal processes to: direct the position acquisition means to supply a current signal which indicates the current rotational position of the rotor in relation to the stator and further supply a first target value and a second target value, direct the phase terminals to tap multiple currently flowing motor phase currents on the motor side direct the transformation module to decompose the currently flowing motor phase currents into a slip component and a torque component using a transformation method, direct the slip regulation module and the torque regulation module to predefine rotor phase currents for commutation of the motor so that the difference between a slip component value and the first target value and the difference between a torque component value and the second target value are minimal, wherein the slip component and the first target value are provided as input variables to the slip regulation module, wherein the torque component and the second target value are provided as input variables to the torque regulation module.