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서영수(YS Seo),이춘상(CS Lee),황락훈(LH Hwang),김종래(JL Kim),이상용(SY Lee),김주래(JL Kim),조문택(MT Cho) 전력전자학회 2000 전력전자학술대회 논문집 Vol.2000 No.11
In order to the torque control, the indirect flux control was performed by controlling the ratio of elf, and the q-axis flux was estimated by the slip command and q-axis current in the rotor circuits. Also, the frequency was controlled to keep on the q-axis flux to be zero, and the constant torque characteristics could be obtained by generation the preset torque<br/> In the induction motor driven by voltage source inverter with the constant voltage and frequency, the speed variation is expressed as a slip. So, the speed control can be achieved by slip<br/> compensation. The slip was calculated with a q-flux current filtered by first-order filter, and, as the result, the error problem which may occur in current detection Was eliminated.