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公开(公告)号：US10291165B2
公开(公告)日：2019-05-14
申请号：US15801866
申请日：2017-11-02
Applicant: ABB Schweiz AG
Inventor： Paul Sandulescu , Giovanni Zanuso , Luca Peretti
Abstract: A method of detecting a permanent magnet rotor of a synchronous machine, includes: injecting a voltage waveform to the stator windings of the synchronous machine, measuring two phase currents in the stator winding, transforming the two phase currents to a rotor reference frame to obtain a current waveform, sampling the current waveform to obtain positive and negative portion values, constructing first and second periodic waveforms by using the sampled positive and negative portion values, performing a frequency analysis of a first and second spectrums of the periodic waveforms, and determining whether a permanent magnet is present in the synchronous machine based on the spectrums.
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