Title :
Robust speed sensorless induction motor drive
Author :
Lin, Faa-Jeng ; Wai, Rong-Jong ; Lin, Pao-Chuan
Author_Institution :
Dept. of Electr. Eng., Chung Yuan Christian Univ., Chung Li, Taiwan
fDate :
4/1/1999 12:00:00 AM
Abstract :
A speed sensorless induction motor (IM) drive with robust control characteristics is introduced. First, a speed observation system, which is insensitive to the variations of motor parameters, is derived based on the concept of sliding mode. Next, an integral-proportional (IP) speed controller using the estimated speed signal is designed to stabilize the speed loop. Then, to preserve the robust control performance under parameter variations and external load disturbance, an adaptive uncertainty observer with feedforward control is proposed. The adaptive uncertainty observer is implemented to estimate the lump of uncertainty of the controlled plant. To increase the accuracy of the estimated values, the speed observation system is implemented using a digital signal processor (DSP) with a high sampling rate
Keywords :
Lyapunov methods; angular velocity control; asymptotic stability; feedforward; induction motor drives; machine vector control; model reference adaptive control systems; observers; robust control; torque control; two-term control; variable structure systems; Lyapunov function; MRAC system; adaptive uncertainty observer; asymptotic stability; coprocessor computer control system; decoupled control; digital signal processor implementation; dynamic model; external load disturbance; feedforward control; field-oriented control; high sampling rate; integral-proportional speed controller; robust control characteristics; robust speed sensorless induction motor drive; sliding mode concept; speed observation system; torque control; Adaptive control; Induction motor drives; Induction motors; Programmable control; Robust control; Robustness; Sensorless control; Signal design; Sliding mode control; Uncertainty;
Journal_Title :
Aerospace and Electronic Systems, IEEE Transactions on
