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A scheme of a model reference adaptive system (MRAS) based on the theory of parameter optimization for the PMSM servo system is described in this paper. The scheme can promptly work out the speed of the rotor without any other position/speed sensor. Different from the other MRAS-based speed observers which constructed according the theory of stability(More)
The sliding model speed observer proposed in this paper can work out the rotor angular speed reliably and perform well both at high speed and low speed with less steady state error by using a distinct sliding hyper plane which actually contains a PI controller. Through broadening the condition of the Lyapunov's stability theory reasonably and skillfully,(More)
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