Motor drive device

摘要

In the case of motor drive devices having a stepping motor, it is known for different stepping grid sizes to be implemented by the stepping motor optionally being selected to the full-step mode or the partial-step mode (half steps, quarter steps etc.). In this case, the fact that the drive force emitted by the stepping motor, or its torque, is less in the partial-stepping mode than in the full-stepping mode has a disadvantageous effect. In order to obtain sufficiently high drive forces in both the full-stepping mode and in the partial-stepping mode of the stepping motor, an additional drive unit (2), for example a DC motor, which emits a uniform drive force is mechanically coupled to the stepping motor (1), which additional drive unit (2) assists the movement sequence predetermined by the stepping motor (1). <IMAGE>