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In terms of the conventional predictive current control system divergence problem caused by the motor's inductance error, this paper proposes two first-order extended state observers (ESO) to observe the d-axis and q-axis disturbance, introduces the observed disturbance into the conventional predictive current control to construct a robust predictive current control, and analyses the stability condition...
This paper proposes a compensated Active Disturbance Rejection Controller (ADRC) based on Sliding Mode Control (SMC) for PMSM speed regulation system. This strategy obtains part of the system disturbance through identifying the moment of inertia and observing the load torque, then compensating them to the controller so as to reduce the pressure of extended state observer (ESO). Meanwhile the algorithm...
This paper proposes a dual reduced-order adaptive Kalman observer to estimate the rotor speed and load torque of PMSM under low speed condition. The observed speed is more precise than encoder differential signals which has more noise, and the estimated torque can be used as feedforward compensation to reduce speed ripple when load changes. Because the calculation amount of Kalman filter is proportional...
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