Sensorless position estimation of Permanent-Magnet Synchronous Motors using a saturation model

2012/07/24 by Al Kassem Jebai, François Malrait, Jebai, Al Kassem +5 · 1 citation
Engineering · #Electric Motor Design and Analysis #FOS: Mathematics #Magnetic Bearings and Levitation Dynamics #Optimization and Control (math.OC) #Sensorless Control of Electric Motors

paper · pdf · doi:10.48550/arxiv.1207.5743

openalex publication_date 2012/07/24 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

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.

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