An Improved Non-Isolated Quadratic DC-DC Boost Converter With Ultra High Gain Ability

Abstract

This paper introduces an improved quadratic DC-DC boost converter to provide an ultra-high level voltage gain with the switched-capacitor cell based structure. The proposed converter has the ability to excel the output voltage gain to the ultra-high level without any voltage doubler circuit. Hence, the total number of components is less compared to the conventional topologies. The proposed converter offers reduced voltage stress on the capacitors, diodes, and semiconductor switches while generating a high voltage gain effect with a low duty cycle. In addition, the continuous source current (CSC) and input-to-output side ground-sharing features are also available for renewable energy applications. The steady-state and comparative performance analysis with similar topologies and power loss calculations are presented in this paper. Furthermore, the simulation results extracted from the Matlab/Simulink are compared and analyzed with the conventional topology. Finally, the experiments are carried out by designing a 150 W laboratory prototype where the peak efficiency is found 90% while delivering 80 W power to the load side.INDEX TERMS DC-DC converter, high voltage gain, non-isolated, voltage stress, quadratic boost converter.

A Critical Analysis of Quadratic Boost Based High-Gain Converters for Electric Vehicle Applications: A Review

“…Among these efforts, [58] is noteworthy because it emphasizes the improvement of system stability using soft-switching methods, while [61] focuses on reducing copper losses to improve overall performance. On the other hand, the efficiency metrics reported in [65,80] are comparatively lower, at 90% and 91.4%, respectively. This could be due to different design priorities or implementation challenges.…”

“…Several of the contributions highlight methods for reducing the voltage stress on diodes and switches [58,61,69,74,80], which improve longevity and dependability. Additionally, the widespread use of component optimization methods to minimize stress and ripple [65,72,74] greatly enhances overall performance. These highgain converter technologies are highly versatile and adaptable due to their tailored features that address specific application demands.…”

Review, Properties, and Synthesis of Single-Switch Non-Isolated DC-DC Converters with a Wide Conversion Range

“…In this sense, Tables 1-6 summarize some important characteristics of all possible combinations, which can be useful for selecting a given topology. For instance, among applications that require a high step-up stage, grid-connected photovoltaic (PV) systems rely on a front-end DC-DC stage for stepping up the low voltage across the modules and supplying a cascaded inverter [50]. The quadratic boost and boost-Ćuk converters could also be adequate choices for this purpose, considering proper tradeoffs among the voltage gain, stresses on semiconductors, and behavior of the currents through the input and output stages.…”

A novel ultra-high gain DC-DC converter with coupled inductor

“…The traditional boost converter can realize high voltage gain by adjusting the high duty cycle, but the voltage gain limitation at medium and low duty cycles can no longer satisfy the applications in recent PV power generation, therefore many scholars have conducted a lot of research on the high gain converters in recent years to make the photovoltaic system to obtain stable high-level DC voltage [6,7,8,9,10]. The high voltage step-up technology is based on the classical boost circuit, adding coupled inductors [11,12,13,14], switched capacitors [15,16,17,18], switched inductors [19,20,21,22], voltage multiplier cells [23,24,25,26,27,28,29], which can reduce the device voltage stress and losses, improve the voltage gain. In [30], a voltage step-up coupled inductor converter has been proposed with high switching voltage stress, which increases switching losses.…”