Dynamic control of induction motor motion via stator voltage variations

H.I. Abodaka, S. Miri
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Abstract

An algorithm for speed-trajectory control of three-phase squirrel-cage induction motors by means of stator voltage control is presented. The dynamic behavior of the induction motor is described by a set of first-order nonlinear differential equations. The stator voltage and the electromagnetic torque are related by a recursion formula. A nonlinear method for controlling the induction motor so that it follows an interpolated speed-trajectory is discussed. To achieve an acceptable control performance, the control law is utilized, together with the recurrence relation, to compute a nonlinear feedback controller. The method consists of first parameterizing the path in the configuration space and then, given a path, using control theory to determine a trajectory subject to torque constraints.<>
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感应电动机定子电压变化的动态控制
提出了一种基于定子电压控制的三相鼠笼式异步电动机速度轨迹控制算法。异步电动机的动态特性用一阶非线性微分方程来描述。定子电压和电磁转矩用递推公式关系式表示。讨论了一种控制异步电动机的非线性方法,使其遵循插值速度轨迹。为了获得可接受的控制性能,利用控制律和递归关系计算非线性反馈控制器。该方法首先在位形空间中参数化路径,然后给定路径,利用控制理论确定受扭矩约束的轨迹。
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