Control Response of N-phase Interleaved Buck Converter for Welding Power Supply

Abstract

An N-phase interleaved converter was analyzed here to improve the current control performance of a welding power supply. Consequently, it was found that the collective current control method of the N-phase interleaved circuit has a current control response closing to that of a single-phase converter circuit with N times carrier frequency and 1/N output inductance. This method reduces the accumulated energy of inductance to 1/N and lowers the heat generation of the device, which can contribute to the miniaturization and higher performance of the welding power supply.