PMSM Sensorless Control of PMSM Based on Variable Theory Domain Fuzzy Control Strategy
Aiming at the jitter problem and poor robustness of the conventional super spiral sliding mode ob-server(STSMO)due to its fixed sliding mode gain when estimating the rotor position and speed of perma-nent magnet synchronous motor(PMSM),this paper proposed a super-twisting sliding mode observer(STSMO)based on the fuzzy control of the variable domain to realize the PMSM position sensor-less control.Firstly,the sliding mode gain of STSMO was controlled by fuzzy control,so that the sliding mode gain can be adjusted adaptively according to the set fuzzy rules to weaken the high-frequency vibration and improve the robustness;secondly,the idea of variable domain was integrated into the fuzzy control rules,so that the in-put and output domains of the fuzzy controller can be expanded or contracted in real time,which can improve the observation accuracy of the observer and reduce the vibration of the system.The super-helical sliding mode observer based on the variable domain fuzzy control can effectively suppress the system vibration and improve the estimation accuracy through the simulation model built by Matlab and the semi-physical simula-tion platform.
permanent magnet synchronous motorsuper-twisting sliding mode observerfuzzy controlvar-iable theory domain
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