Abstract
In this paper, a novel SynRMs position sensorless control method based on high frequency voltage injection (HFVI) in measurement reference frame is presented to eliminate the rotor estimation error caused by cross-coupling magnetic saturation effect. To maximize rotor saliency signal information, the HF voltage signals are injected in measurement reference frame instead estimated reference frame which is mostly adopted by conventional HFVI based methods. And a cross-coupling coefficient is introduced to utilize both $d, q$ -axes current information to extract rotor position. The experiment results based on a 3kW SynRM drive system show the validity of the proposed sensorless control method.
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