Title :
A current-free and parameter-free control algorithm
Author :
Losic, Novica A. ; Varga, Ljubomir Dj
Author_Institution :
Electrohome Ltd., Kitchener, OH, USA
Abstract :
A method of synthesizing a control system comprising a most inner positive voltage feedback loop and an inner negative voltage feedback loop and an outer negative voltage feedback loop is presented. The control system error is forced to zero in steady state and minimized in transient in response to either input command change or external disturbance. No current through the plant under the control is sensed and no parameters of the plant are required to be known implying minimization of measurement noise and adaptive/self-tuning operation, respectively. The method is used to synthesize load-independent and input-voltage-independent switch-mode power converters as well as electric motor drive systems, incorporating any kind of electric motor, of maximized disturbance rejection ratio and minimized dynamics
Keywords :
adaptive control; control system synthesis; electric drives; electric motors; feedback; machine control; power convertors; self-adjusting systems; switched mode power supplies; voltage control; adaptive control; control system synthesis; current-free control algorithm; disturbance rejection ratio; electric motor drive; error; external disturbance; inner negative voltage feedback loop; inner positive voltage feedback loop; input command change; measurement noise; minimization; outer negative voltage feedback loop; parameter-free control algorithm; self-tuning operation; switch-mode power converters; Control system synthesis; Control systems; Current measurement; Electric motors; Error correction; Feedback loop; Force control; Noise measurement; Steady-state; Voltage control;
Journal_Title :
Industry Applications, IEEE Transactions on
