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Speed sensorless control of a six-phase induction motor drive using backstepping control

机译:使用Backstepping控制六相感应电动机驱动器的无速度传感器控制

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摘要

In this study, a direct torque and flux control is described for a six-phase asymmetrical speed and voltage sensorless induction machine (IM) drive, based on non-linear backstepping control approach. First, the decoupled torque and flux controllers are developed based on Lyapunov theory, using the machine two axis equations in the stationary reference frame. In this control scheme, the actual stator voltages are determined from dc-link voltage using the switching pattern of the space vector pulse-width modulation inverter. Then, for a given motor load torque and rotor speed, a so-called fast search method is used to maximise the motor efficiency. According to this method, the rotor reference flux is decreased in the small steps, until the average of real input power to the motor reaches to a minimum value. In addition, a model reference adaptive system-based observer is employed for online estimating of the rotor speed. Finally, the feasibility of the proposed control scheme is verified by simulation and experimental results.
机译:在这项研究中,基于非线性反步控制方法,描述了六相非对称速度和电压无传感器感应电机(IM)驱动器的直接转矩和磁通控制。首先,在静态参考系中使用机器两轴方程,基于李雅普诺夫(Lyapunov)理论开发解耦的转矩和磁链控制器。在该控制方案中,使用空间矢量脉宽调制逆变器的开关模式根据直流母线电压确定实际定子电压。然后,对于给定的电动机负载转矩和转子速度,使用所谓的快速搜索方法来最大化电动机效率。根据此方法,转子参考磁通量会以小步长减小,直到电动机的实际输入功率平均值达到最小值为止。另外,基于模型参考自适应系统的观测器用于在线估算转子速度。最后,通过仿真和实验结果验证了所提控制方案的可行性。

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