Abstract
AbstractA model of the non‐linear switched reluctance motor (SRM) has been developed that provides an analytical representation based on static measurements of the flux linkage by simple polynomial functions. Using an approximation of the Φ(i)‐characteristic with the rotor position angle γ as parameter it is possible to calculate the dynamic performance of the drive in the whole torque‐speed range. Depending on the torque command Tw the switching angles γO (“on”) and γc (“off”) are determined with minimum ohmic losses under the assumption of a constant supply voltage. For the ease of demonstration the results are restricted to the field weakening range. It turns out that the switching angles are parabolic functions of the torque with the well‐known tendency for advance‐shifting at increasing speed. The calculated current waveforms and average torque values coincide well with those measured at the test drive.
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