http://ieeexplore.ieee.org/iel5/5610941/5624686/05624745.pdf

Power electronics

Thank you for downloading power electronics converters applications and design. Maybe you have knowledge that, people have look numerous times for their favorite readings like this power electronics converters applications and design, but end up in harmful downloads. Rather than enjoying a good book with a cup of tea in the afternoon, instead they cope with some malicious virus inside their desktop computer.

Power Electronics Converters Applications And Design

This paper proposes a new interleaved non-isolated high step-up dc-dc converter for interfacing renewable energy applications. The proposed converter achieves a very high step-up voltage gain by using two coupled inductors and a voltage multiplier cell. This topology utilizes the interleaved boost converter in the input side, and the input current is shared with low ripple. Moreover, a voltage multiplier cell with the secondary windings of the coupled inductors is employed in the output side to achieve the interleaved energy storage. The voltage stress on the semiconductor switches and the passive components is significantly reduced and lower than the output voltage. The aforementioned converter can be operated without an extreme duty cycle or a high turns ratio. The reverse recovery problem of the diodes is mitigated, and the leakage energy is recycled. Furthermore, by implementing low-voltage-rated MOSFETs with a small ON-resistance, the conduction losses can be reduced, and the efficiency can be improved. The topology is fed by a single input voltage, and the mathematical expression is methodically explored. The operation principle of the proposed converter and the comparison between the proposed converter with other topologies are discussed. The design, parameters selection, and experimental results are thoroughly introduced. A 32 to 800 V-dc is verified and simulated by using PLECS. Consequently, a 400 W hardware prototype is verified to validate the theory and the design.

/pdf/a-high-step-up-interleaved-dc-dc-converter-with-voltage-455u6ucce2.pdf

A High Step-Up Interleaved DC-DC Converter With Voltage Multiplier and Coupled Inductors for Renewable Energy Systems

In this article, a novel coupled inductor-based high step-up dc–dc converter is proposed. The introduced converter benefits from various advantages, namely ultrahigh voltage gain, low voltage stress on the power switches, and continuous input current with low ripple. Therefore, the presented converter is suitable for renewable energy applications. By utilizing clamped circuit, voltage spike of the active switch is clamped during the turn- off process. Hence, a switch with low $R_{\text{DS-on}}$ can be used, which reduces the conduction losses as well as the cost of the converter. Furthermore, the energy of leakage inductance is used to obtain zero voltage switching (ZVS) for the main and auxiliary switches. Additionally, the output diode current falling rate is controlled by leakage inductance; thus, reverse-recovery problem of output diode is alleviated. The steady-state analysis and design considerations of the proposed converter are discussed. Finally, a 250-W experimental prototype of the presented converter is implemented to validate the converter operation and the theoretical analysis.

Coupled Inductor-Based High Voltage Gain DC–DC Converter For Renewable Energy Applications

The development of high-frequency power converters is continuously improving their power density, efficiency and fast dynamic response. Among them, high-voltage-conversion-ratio (HVCR) dc–dc converters are widely used in high gain, i.e., step-up/-down or bidirectional applications, such as power supply for data center, dc micro-grids, electrical vehicle charging systems, etc. In this article, the current main high-frequency HVCR dc–dc converters are classified into inductive-based and capacitive-based approaches, which can then be described further by four kinds in detail, namely transformer-based, coupled-inductor-based, and switched-capacitor-based, as well as combination of coupled inductor and switched capacitor. A comprehensive analysis and comparison is given, which can provide guidance for proper topology selection and further topology optimization.

Review of High-Frequency High-Voltage-Conversion-Ratio DC–DC Converters

In this paper, a new high voltage gain step-up dc–dc converter is proposed for interfacing renewable power generation. The configuration optimally integrates both the coupled-inductor and switched-capacitor techniques to achieve an ultra-high step-up gain of voltage conversion with low voltage stress and high efficiency. It consists of a voltage boost unit, a passive clamp circuit, and a symmetrical voltage multiplier network. The structure becomes modular and extendable without adding any extra winding for ultra-high step-up voltage gain. The proposed topology not only reduces the voltage stress on the main switch but also maintains it steady for the entire duty cycle range. Furthermore, the reverse recovery issue of the diodes is alleviated through the leakage inductance of the coupled inductor. The operation principle and steady-state analysis are presented in detail. Experimental evaluation validates the claimed advantages and demonstrates a well-distributed efficiency curve and the peak of 96.70%.

Single-Switch High Step-Up DC–DC Converter With Low and Steady Switch Voltage Stress

A family of transformer-less single-switch dual-inductor high voltage gain boost converters is proposed in this article. The proposed configurations can realize high voltage gain with low voltage and current stresses. The voltage gain of the proposed converters is analogous to the switched inductor boost converter; therefore, the proposed boost converters are suitable for high gain applications. The proposed family of converters has low component counts and reduced voltage stress on devices compared to three typical transformer-less single-switch high voltage gain converters including switched inductor boost converter, quadratic boost converter, and quasi- Z -source boost converter. Moreover, the current stress of the front-end diode and the rear-end inductor is also relatively low. Therefore, the conversion efficiency is enhanced while keeping the cost low. The operation principles and steady-state characteristics analysis of the proposed converters under the inductor current continuous conduction mode and continuous bidirectional conduction mode are discussed in detail. A prototype of 300 V, 250 W/100 kHz is developed to verify the performance of the proposed converter. The experimental results substantiate the effectiveness and advantages. The prototype achieves a peak efficiency of 97.5 $\%$ .

A Family of Transformer-Less Single-Switch Dual-Inductor High Voltage Gain Boost Converters With Reduced Voltage and Current Stresses

A dc–dc converter is proposed to achieve a high voltage conversion ratio for bidirectional power flow applications. The nonisolated topology is optimally designed to integrate both the switched capacitor and coupled inductor techniques for high efficiency. The windings of the coupled inductor are stacked at the low voltage source, which transfers any leakage energy of the coupled inductor directly into the output port and simplifies the clamping circuit. The optimal design keeps the voltage stress on the main switches low for the entire duty cycle operation. Thus, the converter demonstrates the advantage of wide-voltage gain based on common ground and low and steady voltage stress in both buck and boost modes of its operation. Furthermore, the converter can realize zero-voltage switching through the synchronous rectifiers without requiring extra hardware circuitry to enhance conversion efficiency. The operation principle, including the steady-state analysis, dynamic modeling, controller design, efficiency analysis, and optimization, are discussed in detail and verified by the experimental test. The prototype substantiates the theoretical analysis and soft-switching operation. The converter exhibits the capability for load and line regulation and demonstrates a peak efficiency of 96.38% in the boost mode and 95.61% in the buck mode of operation.

A High Conversion Ratio and High-Efficiency Bidirectional DC–DC Converter With Reduced Voltage Stress

This paper proposes a high-gain flyback type microinverter for PV power generation. The proposed topology integrates a voltage-doubler circuit with the flyback converter to produce the high voltage-conversion gain. The solution is effective to minimize the high demand of the winding turns ratio in the flyback transformer. Besides, an active-clamp circuit is employed in the primary side for the resonant operation. The solution reduces the voltage and current stress and supports zero voltage switching (ZVS) of the power switching. The stress reduction achieved by the resonant operation further minimizes the conduction loss of the converter. A prototype is constructed and tested to show the experimental performance, which verified the advantages of the proposed solution for PV microinverter applications.

PV Microinverter Solution for High Voltage Gain and Soft Switching

Pakistan is primarily an agriculture country with the capability of producing wheat, cotton, sugarcane and rice, which together are more than 75% of the total crop output. Underground water is the ...

https://www.tandfonline.com/doi/pdf/10.1080/23311916.2018.1466383

Waqas Hassan

Papers

Single-Switch High Step-Up DC–DC Converter With Low and Steady Switch Voltage Stress

A Family of Transformer-Less Single-Switch Dual-Inductor High Voltage Gain Boost Converters With Reduced Voltage and Current Stresses

A High Conversion Ratio and High-Efficiency Bidirectional DC–DC Converter With Reduced Voltage Stress

PV Microinverter Solution for High Voltage Gain and Soft Switching

A hybrid PV/utility powered irrigation water pumping system for rural agricultural areas