Title :
Time optimal control for induction motor servo system
Author :
Kim, Gi-Taek ; Kim, Kyung-Seo ; Park, Min-Ho ; Won, Chung-Yuen ; Ahn, Doo-Soo
Author_Institution :
Dept. of Electr. Eng., Seoul Nat. Univ., South Korea
Abstract :
A time-optimal position control scheme based on Pontryagins´s minimum principle is proposed for the current-source-inverter (CSI)-fed induction motor system. An induction motor with field-oriented control is modeled by a fast time-optimal position control system of second order that has two modes of operation: a bang-bang mode that operates until the position is close to target, followed by a DC breaking mode that provides asymptotic stability. This is achieved by substituting the time-optimal controller for the speed controller in the conventional field-oriented control loop of the motor. The validity of the time-optimal approach has been verified by an experimental test carried out with a prototype MC68000-based microcomputer system and a 5 HP induction motor. Experimental and simulation results are in close agreement.<>
Keywords :
induction motors; invertors; microcomputer applications; optimal control; position control; servomechanisms; 5 hp; DC breaking mode; MC68000-based microcomputer system; Pontryagin minimum principle; asymptotic stability; bang-bang mode; current-source-inverter; field-oriented control; induction motor servo system; time-optimal position control; Control systems; DC motors; Induction motor drives; Induction motors; Microprocessors; Optimal control; Position control; Servomechanisms; Stators; Torque control;
Conference_Titel :
Power Electronics Specialists Conference, 1988. PESC '88 Record., 19th Annual IEEE
Conference_Location :
Kyoto, Japan
DOI :
10.1109/PESC.1988.18243
