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In this paper, a fast online parameter estimation scheme with sinusoidal d-axis current injection is introduced. Compared to the existing parameter estimation strategies, the proposed estimation scheme has relative faster convergence time and is feasible in the transient operation. This estimation scheme is realized by the recursive least square algorithm based on different operating points of the...
In this paper neuro-fuzzy state variable estimators of drive system with an elastic coupling are presented. The described case is related to calculating the load speed and shaft torque based on easy to measure signals. During the design process, fuzzy C-means clustering was applied in order to optimize the structure of tested estimators. The obtained results show very high precision of estimation...
This paper presents a load torque estimation method for self-sensing brushless DC drives. Torque ripples in brushless DC machines can be reduced using load torque information. This method uses the terminal voltage, the virtual neutral point voltage and the DC-bus current of the machine. The algorithm uses the variation of successive back-emf samples to estimate the rotor speed. The rotor position...
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