ISSN 0021-3454 (print version)
ISSN 2500-0381 (online version)
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vol 67 / February, 2024
Article

DOI 10.17586/0021-3454-2022-65-12-874-885

UDC 004.052.42+681.518.5

MINIMIZATION OF ELECTROMAGNETIC TORQUE PULSATIONS IN A FIVE-PHASE ASYNCHRONOUS ELECTRIC DRIVE

V. S. Tomasov
ITMO University, Saint Petersburg, 197101, Russian Federation; Associate professor, Director of Research and Production Center "Precision Electromechanics"


A. A. Usoltsev
ITMO University, Saint Petersburg, 197101, Russian Federation; Associate Professor


D. A. Vertegel
ITMO University, Saint Petersburg, 197101, Russian Federation; postgraduate


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Abstract. The problem of algorithmic minimization of electromagnetic torque pulsations in a five-phase asynchronous electric drive is considered. The principle of constructing an algorithm for space-vector modulation with a monotonic trajectory of the hodograph of the output voltage vector and an algorithm that makes it possible to reduce the torque ripples in the speed control range of 100:1 by an average of more than two times, and in the region of low speeds by more than ten times compared to the main algorithm currently in use, are proposed. This allows to consider a five-phase asynchronous electric drive as an alternative to a synchronous drive in the tasks of precision control of the movement coordinates. However, at a rotation frequency above half the nominal, resonant phenomena are observed, leading to torque ripples up to 30 %, which requires special measures and can completely exclude the possibility of using such a drive for a number of tasks.
Keywords: five-phase drive, modulation algorithm, torque pulsations, minimization of the torque pulsations

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