Magnetic Hysteresis Impact on HF Signal Injection

This article presents a model of a Synchronous Reluctance Motor (SynRM) at standstill, including magnetic hysteresis, to study its impact on High-Frequency (HF) signal injection. So that it can easily be simulated, the model is rewritten under state-form. The parameters of the model are identified, based on experimental data, using a customized fitting procedure adapted to hysteresis curves. The proposed model explains the impact of magnetic hysteresis on HF signal injection and reproduces accurately the experiments.

I. Introduction

For an efficient operation of salient synchronous machines, especially the Synchronous Reluctance Motor (SynRM) and the Permanent Magnet Assisted SynRM (PMA-SynRM), the precise knowledge of the relations between the current and the flux is paramount. Motor manufacturers embed the current-flux maps of the motors they design inside their drives, but generic drive designers need to find methods to identify those maps in situ.