DOI 10.17586/0021-3454-2020-63-8-711-719
UDC 621.3.07
MEASURING THE DERIVATIVE OF CURRENT USING A DELTA-SIGMA MODULATOR FOR SENSORLESS CONTROL OF A TRACTION ELECTRIC DRIVE
National Research University “Moscow Power Engineering Institute”, Moscow, 111250, Russian Federation; Head of Chair
E. O. Stolyarov
National Research University “Moscow Power Engineering Institute” (MEI), Moscow, 111250, Russian Federation; PhD Student
G. L. Demidova
ITMO University, Saint Petersburg, 197101, Russian Federation; Associate professor
Y. Vagapov
Wrexham Glyndwr University, Wrexham, 1LL11 2AW, UK; Lecturer
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;
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Abstract. A method of direct measurement of the derivative of current necessary to determine the induct-ances in electric motors for reliable and efficient operation of sensorless control in AC electric drives is considered. The method is based on measuring the voltage drop across a calibrated inductance installed directly in the converter power circuit. To improve the method accuracy and reduce the effects of transi-ents and interference, a delta-sigma modulator is used to measure the voltage drop. Experimental re-sults obtained for three different inductive measuring shunts are presented.
Keywords: derivative of current, electric drive, sensorless control, delta-sigma modulator, inductive shunt
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