Micro-Step Driving for Stepper Motors: A Case Study

In this paper, a case study for implementation of the micro-step driver optimized for resonance frequencies of the stepper motors is presented. First  of all, the motor driver is implemented in Full- and Half-step modes. According to the irregular torque-to-rotation curve in these modes, several  optimizations are applied to the driver achieving the micro-step driving circuit. Driver circuit is verified for each modes of motor motion. Considering  obtained results, torque-reduction in resonance frequencies (appeared as holes in torque curve at these points) is eliminated with micro-step driving. By this optimization, and in the micro-step driving mode, motor consumes lower power than other modes.

N. Sedaghati-Mokhtari
Graduate Student, School of ECE, University of Tehran

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