DOI 10.17586/0021-3454-2020-63-10-897-906
UDC 621.3.07
STUDY OF CURRENT REGULATION PROCESSES IN ELECTRIC DRIVES WITH SHUNT SENSORS AND DELTA-SIGMA SIGNAL MODULATION
National Research University “Moscow Power Engineering Institute”, Moscow, 111250, Russian Federation; Head of Chair
G. L. Demidova
ITMO University, Saint Petersburg, 197101, Russian Federation; Associate professor
E. O. Stolyarov
National Research University “Moscow Power Engineering Institute” (MEI), Moscow, 111250, Russian Federation; PhD Student
A. A. Zharkov
National Research University “Moscow Power Engineering Institute” (MEI), Moscow, 111250, Russian Federation;R&D Company “Vector”, LLC, Moscow, 111396, Russian Federation; Assistant Professor, Chief Designer
D. K. Surnin
Moscow Power Engineering Institute, Department of Electric Drives;
F. Briz
;
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Abstract. A method is proposed for measuring electric current using shunt and delta-sigma modulation. The research is conducted with a mathematical model of the motor: the open-loop control system was used to determine the measurement accuracy, while the closed-loop system was employed to investigate the effect of measurement error on the system stability and the motor torque pulsation. It is shown that oversampling coefficients of digital filters equal to 8 and lower lead to large disturbances in the current loop due to a high measurement error, even when using the Sinc3 filter. Acceptable results are achieved using the oversampling factor of 16 or higher with the Sinc3 filter type.
Keywords: shunt current sensing, delta-sigma modulation, current control, closed-loop control, torque ripple, electric drive
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