Abstract
In this paper, a new approach is presented for extracting saturated parameters Ld , Lq and permanent-magnet flux linkage λ <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">md</i> with arbitrary load conditions for interior permanent-magnet (IPM) synchronous machines. The procedure starts with the parameter extraction in actual <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">abc</i> reference frame based on transient finite element analysis (FEA) in time domain. Then, the parameters in <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">abc</i> reference frame are transformed to <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">d</i> - <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">q</i> axis reference frame via Park transformation. This approach is able to provide better accuracy and allow easy implementation because the parameters are derived from a realistic physical representation and the effects of the slot leakage and phase-spread harmonic fields are included in the simulation.
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