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This paper provides a technical analysis of the sensorless method using observer Luenberger for speed determination for controlling DC motor drives using a current sensor. The operation of the sensorless speed control of a DC motor was verified in MATLAB/Simulink and then experimentally implemented on setup hardware to make a comparison between the Luenberger estimated value and the real one using a speed meter keyed on the motor. From the data, it was possible to obtain the measurement error at various operating speeds.
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Rubino et al. (2022) studied this question.