Abstract:
A sliding mode predictive current control strategy of permanent magnet synchronous motor with cascaded variable rate sliding mode speed controller based on extended state observer (ESO) improves dynamic and static performance by addressing the issue that motor parameters and load disturbances affect the conventional vector control system.
First, a sliding mode speed controller is constructed using the unique variable rate exponential reaching law, and the ESO estimates and compensates for parameter mismatch and disturbance to increase response time and robustness while decreasing chattering.
Based on the above law, a sliding mode controller is designed to equate the back electromotive force to effectively compensate the deadbeat predictive current controller, which retains current rapidity and improves robustness. Finally, simulation and experiment data demonstrate the control strategy’s efficacy.
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