Abstract
Experimental data shows that permanent magnet stepper motors can spontaneously reverse their direction of rotation when controlled in full step, open-loop mode. This paper shows that the reversal of speed can be explained, and that the reverse speed is equal to three times the forward speed. A linear approximation of the motor dynamics predicts that reverse running will arise when the undershoot of the single-step response exceeds 50% (or when the damping factor is less than 0.11). The observations of this paper suggest a revision of the conventional explanation that resonance problems occur because of high positive velocity at the stepping time. Instead, the data and the analysis of the paper suggest that resonance problems, including stalling and speed reversal, occur due to the growth of the undershoot in the response to repeated steps.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
