A novel three-phase DC/DC converter for high-power applications

Abstract

This paper proposes a new three-phase series resonant converter. The principle working o f the converter is described analytically in detail for switching frequencies equal to the resonant frequency and for switching frequencies greater than the resonant frequency. Additionally, detailed simulations are performed to analyse the converter. Based on the analysis, design criteria for a 5 kW breadboard are derived. The 5 kW breadboard version of the converter has been built to validate the analytical investigations and simulations experimentally. Moreover, the breadboard is used to investigate the ZVS and ZCS possibilities of the topology and the influence of the deadtime and the switching frequency on the overall elficiency.

Analysis of a Three-Phase Grid-Connected PV Power System Using a Modified Dual-Stage Inverter

“…Various three-phase DC-DC converters with so commutation are available [41,42,[70][71][72]. Each of them was evaluated about the efficiency in different input power levels, components number, EMI emission, performance under unbalanced conditions, and power range.…”

“…Each of them was evaluated about the efficiency in different input power levels, components number, EMI emission, performance under unbalanced conditions, and power range. e topology that appears to relate the best characteristics for the proposal application in this paper is presented in Figure 13, obtained from [42]. e transformer was replaced by their leakage inductances, Ld.…”

“…If > , the converter operates in ZVS. In this condition, the efficiency is much reduced for low-power transfer [42,73]. en…”

“…e three-phase isolated DC-DC series resonant converter (SRC3) [41,42] was applied to act as DC-DC stage. Despite the galvanic isolation, the measured efficiency of the DC-DC stage was limited to 96%-97.5% under a 45%-100% load condition.…”

PV Solar Energy Conversion Using The Behavior Matching Technique

“…The topic of this chapter focuses on the application of the three-phase isolated DC-DC series resonant converter (SRC3), proposed by Jacobs et al (2004), in a dual-stage inverter. Despite the galvanic isolation, the measured efficiency of this DC-DC converter was above 97% under a 45% to 100% load condition.…”