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The windings of power synchronous machines are often parallel connected to obtain the desired machine voltage and current ratings. Ideally, the split-phase currents are equal in symmetrical windings, so as to avoid parasitic circulation of current in the parallel branches. However, the symmetry is broken in case of rotor eccentricity, and the split-phase currents become unbalanced. Part I of this...
This paper presents a position estimation method for a Permanent Magnet Synchronous Machine (PMSM) with multiple comparably strong saliences at low and zero speed. An anisotropy harmonics model is compared to the machines anisotropy found through the current measurement, the result of which is defined as the error. Then a minimization rule for this error is derived and employed to construct a nonlinear...
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