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Application of Barycentric Coordinates in Space Vector PWM Computations

Abstract

This paper proposes the use of barycentric coordinates in the development and implementationof space-vector pulse-width modulation (SVPWM) methods, especially for inverters with deformed space-vector diagrams. The proposed approach is capable of explicit calculation of vector duty cycles, independentof whether they assume ideal positions or are displaced due to the DC-link voltage imbalance. The use ofbarycentric coordinates also permits a well-defined and universal approach to the problem of identifyingthe region in which the reference vector is located. It completely avoids the use of angles, trigonometricfunctions, and inverse trigonometric functions and is chiefly based on matrix operations which are well suitedfor digital signal processor implementation. The proposed approach is exposed and validated for the specialcase of three-level neutral-point clamped (NPC) inverter controlled by a discontinuous space-vector PWM.

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Category:
Articles
Type:
artykuły w czasopismach
Published in:
IEEE Access no. 7, pages 91499 - 91508,
ISSN: 2169-3536
Language:
English
Publication year:
2019
Bibliographic description:
Szczepankowski P., Nieznański J.: Application of Barycentric Coordinates in Space Vector PWM Computations// IEEE Access -Vol. 7, (2019), s.91499-91508
DOI:
Digital Object Identifier (open in new tab) 10.1109/access.2019.2914854
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