Speed-sensorless nonlinear predictive control of a squirrel cage motor

This paper presents a nonlinear generalised predictive control scheme for a squirrel cage motor without speed sensor. Some of the difficulties faced are due to uncertainties in the parameters measurements, high cost to obtain state measurements in addition to the inherently non-linear behaviour. The control scheme presented is composed of a positioning predictive control and an open loop observer used to obtain state measurements. The proposed control scheme allows a simple and straightforward implementation. The effectiveness of this control algorithm has been successfully verified through simulations.

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