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Time optimal control for induction motor servo system

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2 Author(s)
Park, M.-H. ; Dept. of Electr. Eng., Seoul Nat. Univ., South Korea ; Chung-Yeun Won

A time-optimal position control scheme based on Pontryagin's minimum principle is proposed for a current-source-inverter (CSI) fed induction motor system. The induction motor with field-oriented control is modeled with a fast time-optimal position control system of second order which has two modes of operation: the first bang-bang mode operates until the position is close to target, followed by second DC braking mode which gives asymptotic stability. In order to realize this aim, the time-optimal controller is added instead of the speed controller to the conventional field oriented control loop of the CSI-fed induction motor. The validity of the time-optimal control solution has been verified by an experimental test. Experimental results are in close agreement with a digital simulation

Published in:

Power Electronics, IEEE Transactions on  (Volume:6 ,  Issue: 3 )