Abstract：Because of some inherent advantages, the dual three-phase induction machine is suitable for railway transportation and other low-voltage, high-power and high-reliability occasions. Due to switching losses and cooling conditions, the maximum switching frequency of the inverter in high-power traction drive systems is usually not more than 1kHz. According to the characteristics of the multi-mode modulation technique, the vector control strategy under low switching frequency for the dual three-phase induction machine is proposed in this paper. It includes the flux observer, the currents regulators in (αβ) subspace and (xy) subspace, the phase-angle regulator, and the correction strategy of the flux orientation. Besides, in the view of the problem that the voltage amplitude cannot be adjusted under the condition of square waves, a modified vector control strategy is presented. Simulation of a software simulation system and experimental results from a prototype machine verify the proposed vector control strategy under low switching frequency.
王琛琛, 王堃, 游小杰, 周明磊. 低开关频率下双三相感应电机矢量控制策略[J]. 电工技术学报, 2018, 33(8): 1732-1741.
Wang Chenchen, Wang Kun, You Xiaojie, Zhou Minglei. Vector Control Strategy for Dual Three-Phase Induction Machines under Low Switching Frequency. Transactions of China Electrotechnical Society, 2018, 33(8): 1732-1741.
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2018, Vol. 33 
