Estimation of Saturation of Permanent-Magnet Synchronous Motors Through an Energy-Based Model

TL;DR

This paper introduces an energy-based parametric model for PMSMs that captures saturation effects and uses voltage injection and current ripple measurements to estimate magnetic parameters, validated through experiments.

Contribution

It presents a novel energy-function-based model for PMSM saturation and a linear least squares estimation method using voltage injection measurements.

Findings

Effective estimation of magnetic parameters demonstrated on real PMSMs.

Model accurately captures saturation effects in PMSMs.

Experimental validation confirms the method's practicality.

Abstract

We propose a parametric model of the saturated Permanent-Magnet Synchronous Motor (PMSM) together with an estimation method of the magnetic parameters. The model is based on an energy function which simply encompasses the saturation effects. Injection of fast-varying pulsating voltages and measurements of the resulting current ripples then permit to identify the magnetic parameters by linear least squares. Experimental results on a surface-mounted PMSM and an interoir magnet PMSM illustrate the relevance of the approach.