This paper proposes a new mutual inductance identification method with secondary resistance identification for a vector controlled invertr with speed sensor. A torque fluctuation due to the mutual inductance variation along with flux command change could be restrained by usingthe proposed mehtod. On the other hand, as for a speed sensor-less vector ocntroled inverter, a speed estimation method iwht primary rsistance identification has been proposed[1]. The speed reversal operations at acceleration 9.2 rpm/sec through zero frequency have been achieved under full load condition.
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