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Experimental verification of Hopf bifurcation in pulse-width modulated inverter fed cage induction motor drive system

机译:脉宽调制逆变器笼式异步电动机驱动系统中霍普夫分岔的实验验证

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Bifurcation theory deals with the change of qualitative behaviour in a parameter space of dynamical systems. This study investigates the bifurcation phenomenon of an industrial drive having typically constant speed requirement for which pulse-width modulated inverter fed cage induction motor (IM) is a good choice. The focus is on bifurcation analysis of the stator voltage controlled IM drive, with a particular emphasis on the dynamics and stability under variations of load torque and proportional integral controller gain. Extensive computer simulations are performed to capture the system??s dynamic behaviour and demarcate the bifurcation boundaries. Trajectory and Poincar?? section before and after the bifurcation are shown. The detailed mathematical model of the closed-loop system is derived and is used to analyse the observed bifurcation phenomena. The describing equations reveal that the system loses stability via supercritical Hopf bifurcation. Experimental results are also provided to confirm the theoretical analysis.
机译:分岔理论处理动力学系统参数空间中质性行为的变化。这项研究调查了通常具有恒定速度要求的工业驱动器的分叉现象,对此,脉宽调制逆变器馈电笼式感应电动机(IM)是一个不错的选择。重点是定子电压控制的IM驱动器的分叉分析,尤其着重于负载转矩和比例积分控制器增益变化下的动态和稳定性。进行了广泛的计算机仿真,以捕获系统的动态行为并划分分叉边界。弹道与庞加莱?显示了分叉前后的截面。推导了闭环系统的详细数学模型,并将其用于分析观察到的分叉现象。描述方程表明,该系统通过超临界Hopf分支失去了稳定性。还提供实验结果以证实理论分析。

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    《Power Electronics, IET》 |2014年第2期|340-349|共10页
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