Journal
Scientific and technical journal «Priborostroenie»
UDK621.3.07
Issue:10 (63)
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STUDY OF CURRENT REGULATION PROCESSES IN ELECTRIC DRIVES WITH SHUNT SENSORS AND DELTA-SIGMA SIGNAL MODULATION
Annotation
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.
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