<論文>誘導電動機の2自由度適応制御

概要

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This paper presents a two-degree-of-freedom adaptive control scheme for an induction motor. The mechanical parameters of induction motors are generally changed. For example, the coefficient of friction is depending on the motor speed. If the control parameters are fixed, this fact affects the system responses. So, the coefficients of motors should be identified and its correct value should be used to decide the control parameters. The technique which indetifies the object's coefficients and tunes the control parameters automatically is called an adaptive control. This paper employs the adaptive control to regulate the speed of the induction motor. Besides, the 2-degree-of-freedom controller is used. This controller enables to adjust the tracking speed characteristics and the load suppression characteristics independently. Using these control methods, it is possible to place the poles (δ) and a zero (ξ) of the pulse transfer function in the z plane freely. An experimental model using a 2.2kW induction motor is built. The tracking speed characteristics are investigated under next three conditions both in simulations and in experiments ; (a) δ > ξ, (b) δ = ξ, and (c) δ < ξ. The results of simulations and experiments are compared with each other. Then, it is known that the fastest responses are obtained without overshoot under the condition (b) .
沼津工業高等専門学校の論文
1997-01-31