Application of Analytic Signal and Smooth Interpolation in Pulse Width Modulation for Conventional Matrix Converters

Paweł Szczepankowski; Patrick Wheeler; Tomasz Bajdecki

doi:10.1109/tie.2019.2956391

Application of Analytic Signal and Smooth Interpolation in Pulse Width Modulation for Conventional Matrix Converters

Abstract

The paper proposes an alternative and novel approach to the PWM duty cycles computation for Conventional Matrix Converters (CMC) fed by balanced, unbalanced or non–sinusoidal AC voltage sources. The presented solution simplifies the prototyping of direct modulation algorithms. PWM duty cycles are calculated faster by the smooth interpolation technique, using only vector coordinates, without trigonometric functions and angles. Both input voltages and output reference voltages are expressed by analytic signals in the proposed direct modulation. Input voltages are represented by the rotating vector collection in the two–dimensional Cartesian coordinate system. All reference output voltages are located inside the triangular surface, named here as the voltage synthesis field, formed by these rotating vectors. A certain degree of reference signals placement freedom allows to maximize the voltage transfer ratio to 0:866 with less switching compared to the Optimum–Venturini direct method. The proposed solution was verified by simulations and experiments for CMC3xk. The comparison with the Optimum–Venturini modulation is included. The proposed PWM duty cycle computation approach can also be applied to multiphase CMC converters for any number of inputs as well as outputs.

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Keywords

AC-AC CONVERTERS, MATRIX CONVERTERS, PULSE WIDTH MODULATION.

Details

Category:

Articles

Type:

artykuły w czasopismach

Published in:

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS no. 67, pages 10011 - 10023,
ISSN: 0278-0046

Language:

English

Publication year:

2020

Bibliographic description:

Szczepankowski P., Wheeler P., Bajdecki T.: Application of Analytic Signal and Smooth Interpolation in Pulse Width Modulation for Conventional Matrix Converters// IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS -Vol. 67,iss. 12 (2020), s.10011-10023

DOI: