Interleaved full ZVZCS DC–DC boost converter: analysis, design, reliability evaluations and experimental results

Abstract

In this study, a new interleaved full soft switching DC-DC boost converter with a high power reliability is proposed. To achieve soft switching, a simple auxiliary circuit consisting of one switch, one diode, one inductor and two capacitors is employed in each single-phase DC-DC boost converter connected in parallel. All switches and diodes, including main and auxiliary ones, operate under soft switching conditions. These soft switching conditions consist of zero voltage and zero current switching (ZVZCS) for all switches and diodes at switching transitions except the output diodes, which turn off only with zero current switching. The soft switching technique used in this study decreases power losses which leads the converter to have higher efficiency and reliability. Also, the auxiliary circuit is located out of the main power path preventing high voltage and current stresses on the switches. In this study, operational modes analysis, design procedure, power reliability evaluations and laboratory prototype results with switching frequency of 20 kHz, input voltage of 48 V and output power of 40 W are presented. T R component temperature rise above T AO R sng , R int single-phase and interleaved converters power reliabilities, respectively

Hardware Approach to Mitigate the Effects of Module Mismatch in a Grid-connected Photovoltaic System: A Review

“…Positioning the central inverter in between the array and the grid results in numerous advantages, as mentioned in the Introduction [70,72,73]. The conventional non-isolated DC-DC converter, such as buck, boost, and buck-boost is commonly used as the main building block of the DCO [70,72,[74][75][76].…”

Efficient ZVT cell for interleaved DC–DC converters

“…Zero voltage transition (ZVT) technique [9][10][11][12] is an active soft switching method which is very popular since it can effectively eliminate switching and capacitive turn on losses while the converter control stays at pulse width modulation. Therefore, many research works are performed on ZVT interleaved converters [13][14][15][16][17][18][19][20][21][22][23][24][25].…”

“…The novel ZVT cell is applied to various types of interleaved converters to create a novel family of ZVT interleaved converters. The interleaved converters equipped with the proposed ZVT cell overcome the aforementioned drawbacks of the converters presented in [13][14][15][16][17][18][19][20][21][22][23][24][25]. Besides, the proposed ZVT cell can improve the current imbalance between interleaved phases.…”

Design, analysis and application of high set-up ZVT DC–DC converter with direct power transfer

“…To overcome the problems of this ZVT converter, many topologies are introduced in the literature [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32].…”

“…In [14], the semiconductor devices are turned on and off with SS but the main switch is exposed to high current stress. In [15], the main switch operates with SS without extra current stress.…”