Comparison of Coupled-Inductor based Interleaved High Gain DC-DC Converter Topologies
11 Feb 2021-
TL;DR: In this article, a group of high gain DC-DC converters derived from the basic interleaved converter is proposed, which is further boosted by the diode capacitor multiplier (DCM) pairs.
Abstract: A group of high gain DC-DC converters derived from the basic interleaved converter is proposed in this paper The output of the interleaved structure is further boosted by the diode capacitor multiplier (DCM) pairs The interleaved nature of the converters helps in reducing the input current ripple Further, the energy storage inductors are supplanted by coupled inductors Resultantly, the series arrangement of the secondary winding of the coupled inductors (CI) also takes active participation in improving the voltage gain The three converters presented in this paper are simulated with an input voltage of 18V, making the switches to operate at a duty ratio of 05 and achieve 380V at the load terminals The simulated waveforms and other parameters are compared to analyze the pros and cons of the three presented converters with regards to their ability to achieve high voltage gain
Citations
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TL;DR: In this paper , a multi-port DC-DC power converter is proposed to deal with the intermittent nature and slow responsiveness of renewable energy applications, where the secondary port consists of both energy storage and solar energy source and both are switched alternatively using a bi-directional switching topology.
1 citations
01 Jan 2023
TL;DR: In this paper , four asymmetric multi-input high gain DC-DC converter topologies are designed, simulated, and compared, and four different combinations of three individual HGCs are connected in different combinations using ORing diodes.
Abstract: In this paper, four asymmetric multi-input high gain DC–DC converter topologies are designed, simulated, and compared. Each multi-input converter (MIC) topology comprises of two individual high gain DC–DC converters (HGC) which are excited from separate DC sources and have different power ratings. They employ interleaving technique with coupled inductors (CI) and voltage gain extension mechanisms like the voltage-lift (VL) technique, diode–capacitor multipliers (DCM), and voltage multiplier cells (VMCs). Resultantly, two HGCs yield a voltage gain of 10, while the remaining HGC provides a voltage gain of 13.33. Each MIC topology is synthesized by connecting the individual outputs obtained from the HGCs in parallel using ORing diodes. They aid in sharing the current delivered by the individual HGC to the load. The three individual HGCs are connected in four different combinations. Thus, four MIC topologies are obtained. Simulation results are obtained for all the MIC topologies using PSIM. Based on the simulation results, the current shared by the MIC topologies which employ ORing diodes are validated and compared. The advantageous features of the proposed asymmetric MIC topologies are their ability to (i) yield high-voltage gain of 10, (ii) draw smooth and ripple-free input current, and (iii) share the required load demand by using ORing diodes alone and without using complicated current control techniques.
References
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TL;DR: In this paper, the authors comprehensively review and classify various step-up dc-dc converters based on their characteristics and voltage-boosting techniques, and discuss the advantages and disadvantages of these voltage boosting techniques and associated converters.
Abstract: DC–DC converters with voltage boost capability are widely used in a large number of power conversion applications, from fraction-of-volt to tens of thousands of volts at power levels from milliwatts to megawatts. The literature has reported on various voltage-boosting techniques, in which fundamental energy storing elements (inductors and capacitors) and/or transformers in conjunction with switch(es) and diode(s) are utilized in the circuit. These techniques include switched capacitor (charge pump), voltage multiplier, switched inductor/voltage lift, magnetic coupling, and multistage/-level, and each has its own merits and demerits depending on application, in terms of cost, complexity, power density, reliability, and efficiency. To meet the growing demand for such applications, new power converter topologies that use the above voltage-boosting techniques, as well as some active and passive components, are continuously being proposed. The permutations and combinations of the various voltage-boosting techniques with additional components in a circuit allow for numerous new topologies and configurations, which are often confusing and difficult to follow. Therefore, to present a clear picture on the general law and framework of the development of next-generation step-up dc–dc converters, this paper aims to comprehensively review and classify various step-up dc–dc converters based on their characteristics and voltage-boosting techniques. In addition, the advantages and disadvantages of these voltage-boosting techniques and associated converters are discussed in detail. Finally, broad applications of dc–dc converters are presented and summarized with comparative study of different voltage-boosting techniques.
1,230 citations
TL;DR: A proper comparison is established among the most important non-isolated boost-based dc-dc converters regarding the voltage stress across the semiconductor elements, number of components and static gain.
Abstract: The major consideration in dc-dc conversion is often associated with high efficiency, reduced stresses involving semiconductors, low cost, simplicity and robustness of the involved topologies. In the last few years, high-step-up non-isolated dc-dc converters have become quite popular because of its wide applicability, especially considering that dc-ac converters must be typically supplied with high dc voltages. The conventional non-isolated boost converter is the most popular topology for this purpose, although the conversion efficiency is limited at high duty cycle values. In order to overcome such limitation and improve the conversion ratio, derived topologies can be found in numerous publications as possible solutions for the aforementioned applications. Within this context, this work intends to classify and review some of the most important non-isolated boost-based dc-dc converters. While many structures exist, they can be basically classified as converters with and without wide conversion ratio. Some of the main advantages and drawbacks regarding the existing approaches are also discussed. Finally, a proper comparison is established among the most significant converters regarding the voltage stress across the semiconductor elements, number of components and static gain.
459 citations
TL;DR: In this paper, a novel high step-up dc/dc converter is presented for renewable energy applications, which consists of a coupled inductor and two voltage multiplier cells, in order to obtain high step up voltage gain.
Abstract: In this paper, a novel high step-up dc/dc converter is presented for renewable energy applications. The suggested structure consists of a coupled inductor and two voltage multiplier cells, in order to obtain high step-up voltage gain. In addition, two capacitors are charged during the switch-off period, using the energy stored in the coupled inductor which increases the voltage transfer gain. The energy stored in the leakage inductance is recycled with the use of a passive clamp circuit. The voltage stress on the main power switch is also reduced in the proposed topology. Therefore, a main power switch with low resistance $R_{{\rm DS} ({\rm ON})}$ can be used to reduce the conduction losses. The operation principle and the steady-state analyses are discussed thoroughly. To verify the performance of the presented converter, a 300-W laboratory prototype circuit is implemented. The results validate the theoretical analyses and the practicability of the presented high step-up converter.
327 citations
TL;DR: In this paper, the authors proposed a non-isolated high step-up dc-dc converter with dual coupled inductors suitable for distributed generation applications, which inherits shared input current with low ripple, which also requires small capacitive filter at its input.
Abstract: This paper introduces a non-isolated high step-up dc–dc converter with dual coupled inductors suitable for distributed generation applications. By implementing an input parallel connection, the proposed dc–dc structure inherits shared input current with low ripple, which also requires small capacitive filter at its input. Moreover, this topology can reach high voltage gain by using dual coupled inductors in series connection at the output stage. The proposed converter uses active clamp circuits with a shared clamp capacitor for the main switches. In addition to the active clamp circuit, the leakage energy is recycled to the output by using an integrated regenerative snubber. Indeed, these circuits allow soft-switching conditions, i.e., zero voltage switching and zero current switching for active and passive switching devices, respectively. The mentioned features along with a common ground connection of the input and output make the proposed topology a proper candidate for transformer-less grid-connected photovoltaic systems. The operating performance, analysis and mathematical derivations of the proposed dc–dc converter have been demonstrated in the paper. Moreover, the main features of the proposed converter have been verified through experimental results of a 1-kW laboratory prototype.
287 citations
TL;DR: The steady-state analysis of the proposed dc–dc converter with high voltage gain is discussed and the proposed converter prototype circuit is implemented to justify the validity of the analysis.
Abstract: In this paper, a nonisolated dc–dc converter with high voltage gain is presented. Three diodes, three capacitors, an inductor, and a coupled inductor are employed in the presented converter. Since the inductor is connected to the input, the low input current ripple is achieved, which is important for tracking maximum power point of photovoltaic panels. The voltage stress across switch S is clamped by diode D 1 and capacitor C 1. Therefore, a main switch with low on-resistance RDS (on) can be employed to reduce the conduction loss. Besides, the main switch is turned on under zero current. This reduces the switching loss. The steady-state analysis of the proposed converter is discussed in this paper. Finally, the proposed converter prototype circuit is implemented to justify the validity of the analysis.
191 citations