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Carrier-Based PWM equivalent to multilevel multiphase space vector PWM techniques

López Sánchez, ÓscarAutor UVIGO; Álvarez Ruiz De Ojeda, Luis Jacobo; Gómez Yepes, AlejandroAutor UVIGO; Baneira Collazo, FernandoAutor UVIGO; Pérez Estévez, Diego; Freijedo Fernández, Francisco Daniel; Doval Gandoy, Jesus
DATE: 2020-07
UNIVERSAL IDENTIFIER: http://hdl.handle.net/11093/1623
UNESCO SUBJECT: 3307 Tecnología Electrónica ; 2203 Electrónica
DOCUMENT TYPE: article

ABSTRACT

The space vector pulsewidth modulation (SVPWM) techniques enhance the performance of multilevel multiphase inverters. With multilevel (three-phase) inverters and with (two-level) multiphase inverters, it is widely accepted that the typical SVPWM strategies have an equivalent carrier-based pulsewidth modulation (CBPWM) counterpart, which produces identical results. However, the conclusions reached in the articles that show these cannot be applied, nor even extended, to SVPWM techniques with more than two levels and three phases. This article shows that the most widely accepted multilevel multiphase SVPWM techniques have a fully equivalent CBPWM counterpart, which consists of a phase disposition pulsewidth modulation with an appropriate zero-sequence injection scheme. Closed-form expressions to calculate the zero sequences are provided. The proposed modulation techniques are simulated and then implemented in a field- programmable gate array, showing that the equivalent CBPWM techniques produce identical results as the original SVPWM ones, but with a significant reduction of hardware requirements. The proposed methodology can be generalized to other multilevel multiphase SVPWM techniques.
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