Sensorless control of Permanent-Magnet Synchronous Motors (PMSM) at low velocity remains a challenging task. A now well-established method consists in injecting a high-frequency signal and use the rotor saliency, both geometric and magnetic-saturation induced. This paper proposes a clear and original analysis based on second-order averaging of how to recover the position information from signal injection; this analysis blends well with a general model of magnetic saturation. It also proposes a simple parametric model of the saturated PMSM, based on an energy function which simply encompasses saturation and cross-saturation effects. Experimental results on a surface-mounted PMSM and an interior magnet PMSM illustrate the relevance of the approach.
@article{arxiv.1207.5743,
title = {Sensorless position estimation of Permanent-Magnet Synchronous Motors using a saturation model},
author = {Al Kassem Jebai and Francois Malrait and Philippe Martin and Pierre Rouchon},
journal= {arXiv preprint arXiv:1207.5743},
year = {2012}
}
Comments
9 pages and 9 figures. arXiv admin note: substantial text overlap with arXiv:1203.5672