Real-time sliding-mode observer and control of an induction motor
Benchaib, A.; Rachid, A.; Audrezet, E.; Tadjine, M.
Industrial Electronics, IEEE Transactions on
Volume 46, Issue 1, Feb 1999 Page(s):128 - 138
Digital Object Identifier 10.1109/41.744404
Summary:This paper deals with the control and observation of an induction
motor using a sliding-mode technique. The authors' aim is to regulate
the speed and the square of the rotor flux magnitude to specified
references. Assuming that all the states are measured, sliding surfaces
are proposed within a sliding-mode control framework. Then, the stator
voltages are derived such that the sliding surfaces are asymptotically
attractive since, in practice, the rotor fluxes are not usually
measurable, a sliding-mode observer is derived to estimate the rotor
fluxes. Furthermore, it is shown that their observer is robust against
modeling uncertainties and measurement noise. To illustrate their
purpose, they present experimental results for a 0.37-kW induction motor
obtained on a digital-signal-processor-based system (TMS 320C31/40 MHz).
The experimental results show that the proposed control system is robust
against rotor resistance variations
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