In this paper an efficient high step-up converter with a coupled- inductor with soft- switching operation is presented. The proposed topology includes a coupled-inductor boost converter for raising the voltage gain. Moreover, a simple auxiliary resonant circuit composed of an auxiliary switch, a clamping diode and a resonant tank (inductor, capacitor), is adopted in this paper. The coupled-indu...

Abstmct Several new schemes of constructing 39 low harmonic rectifiers are introduced here. These 39 ac-dc topologies are derived fiom parent dc-dc converter topologies. With a single active switch featuring the zero-voltage switching property (ZVS) in addition to the diode rectifier bridge, the rectifiers are capable of naturally drawing approximately sinusoidal input current waveforms at near...

In this article, a three winding coupled inductor-based dual active bridge (TWCI DAB) dc-dc converter is proposed. Similar to the current-fed DAB converter, proposed TWCI has small input current ripple and wide voltage range. addition, zero-voltage switching (ZVS) of all switches in full load range under variation can be realized. With magnetic integration structure, size total magnetics reduce...

Recently, the LLC resonant converter has drawn a lot of attention due to its advantages over the conventional series resonant converter and parallel resonant converter: narrow frequency variation over wide load and input variation and Zero Voltage Switching (ZVS) of the switches for entire load range. This paper presents an analysis and reviews practical design considerations for the LLC-type r...

In this paper, two methods of control for high-voltage Full Bridge Series-Parallel Resonant (FBSPR) DC-DC converter are proposed and the results are compared. Soft switching operation using Zero Current Switching (ZCS) and Zero Voltage Switching (ZVS) technologies is employed to decrease the losses and optimize the efficiency of converter. The way of obtaining small-signal model of FBSPR conver...

This paper presents a soft-switching non-isolated interleaved high step-up topology to implement in renewable energy systems. By using low number of power electronic devices and incorporation with the coupled inductors (CIs) built-in transformer (BIT), simultaneously, mixed voltage multiplier cell (VMC), an ultra-large gain can be obtained. In addition, interlevead structure input side causes d...

In this paper, a zero-voltage and zero-current transition (ZVZCT) boost converter is presented with small number of auxiliary components, such as resonant capacitor, inductor an power switch, to produce main switch both switching (ZVS) (ZCS). Furthermore, the also has zero current switching. addition, look-up table employed implement auto-tuning technique regulate trigger position turn-on time ...

The series–parallel resonant converter (also called line level control (LLC) resonant converter) is one of the most suitable topologies for dc–dc power supply. This study introduces the LLC resonant converter into the on-board battery chargers for the plug-in hybrid electric vehicle (PHEV) applications. Different from the previous literature which has focused on the wide operation range and hol...

In this paper, an energy storage system with voltage equalization strategy for wind energy conversion is presented. The proposed energy storage system provides a voltage equalization strategy for series-connected lead-acid batteries to increase their total storage capacity and lifecycle. In order to draw the maximum power from the wind energy, a perturbation-and-observation method and digital s...

In this paper an asymmetrical duty cycle control strategy was proposed to the TPTL dc/dc converter. The modified converter remains all the advantages of original control strategy; meanwhile, soft-switching can be achieved using the energy stored in output filter inductance and leakage inductances of transformers (or resonant inductances).Three-phase three-level (TPTL) dc/dc converter has the ad...