Analysis of high‐frequency PWM techniques suitable for resonant inverters

Abstract

Special Pulse-Width-Modulation ( P WM) techniques capable of realizing true P WM operation of quasi-resonant DC-link inverters are presented. These techniques provide an increased value of the lowest switching time f o r higher carrierfrequencies. The harmonic performances are extensively studied by simulation in comparison with conventional Space-Vector Modulation and a simple algorithm f o r real-time implementation is developed.

A technology demonstrator with a SD Card flash memory for implementation of three-phase multi-optimal PWM generator

“…3, Fig. 4) [9,10,11,12,13]. Similar to these references, we will consider the Harmonic Current Factor (HCF) as figure of merit:…”

“…It has been demonstrated [9,10,11,12,13] that a variation of the carrier frequency with an increase around each sector's bisectrix and a relaxation around the active vectors would improve the current harmonic performance (Fig. 3, Fig.…”

An SD Card Flash-Memory-Based Implementation of a Multioptimal Three-Phase PWM Generator

“…2) Frequency Modulation Moreover, we can further improve the results by varying the pulse period several times during each 60 degrees of the fundamental period. It has been demonstrated [21], [22], [23], [24], [25], [26] that a variation of the carrier (pulse) frequency with an increase around each 60-degrees sector's bisectrix and a relaxation around the active vectors would improve the current harmonic performance.…”