Analysis, Design, and Implementation of a Zero-Voltage-Transition Interleaved Boost Converter

Abstract

This study proposes a novel zero voltage transition (ZVT) pulse width modulation (PWM) DC-DC interleaved boost converter with an active snubber cell. All the semiconductor devices in the converter turn on and off with soft switching to reduce the switching power losses and improve the overall efficiency. Through the interleaved approach, the current stresses of the main devices and the ripple of the output voltage and input current are reduced. The main switches turn on with ZVT and turn off with zero voltage switching (ZVS). The auxiliary switch turns on with zero current switching (ZCS) and turns off with ZVS. In addition, the snubber cell does not create additional current or voltage stress on the main switches and main diodes. The proposed converter can smoothly achieve soft switching characteristics even under light load conditions. The theoretical analysis and operating stages of the proposed converter are made for the D > 50% and D < 50% modes. Finally, a prototype of the proposed converter is implemented, and the experimental results are given in detail for 500 W and 50 kHz. The overall efficiency of the proposed converter reached 95.5% at nominal output power.

Design and Development of Non-Isolated Modified SEPIC DC-DC Converter Topology for High-Step-Up Applications: Investigation and Hardware Implementation

“…As discussed earlier, the converter goes to DCM operation if the value of load resistance is small, as presented in Equation (17). The plot between the normalized boundary output current and the duty cycle of the switch for various turns ratio of the coupled inductor is illustrated in Figure 8.…”

“…This technique also helps to achieve a high conversion efficiency due to the lower part count. Due to various merits, the conventional SEPIC converter is provided with the coupled inductor to increase the voltage gain [14][15][16][17][18]. However, the converters with the coupled inductor have problems such as two magnetic circuits with a few extra components which are used to increase the voltage gain, but which may damage the power density of the converters [19][20][21], and the necessity of clamp circuits to recover the energy leaked by the coupled inductor which further increases the losses in the converter [22].…”

Hydrogen production system with fuzzy logic-controlled converter

“…The converters can be controlled by pulse width modulation (PWM) [2][3][4][5][6][7] or resonant switching techniques [8][9][10][11][12][13]. The studies on DC-DC converters usually aim at improving efficiency and reducing cost and volume [14][15][16][17][18][19][20][21][22]. Higher power density can be achieved by increasing the switching frequency of the converter.…”

Design and application of a novel snubber cell for soft switched pwm dc–dc converters

“…These issues are mainly low power density, switching power losses, electromagnetic interference (EMI), high reverse recovery losses and so on. To eliminate these issues at high switching frequencies, the soft switching (SS) techniques are introduced in the literature [1][2][3][4].…”