No-isolated high gain DC/DC converter with low input current ripple suitable for renewable applications

In this paper, a new non-isolated high voltage gain dc/dc converter with low input current ripple is proposed for renewable sources applications. The proposed converter combined SEPIC converter and voltage multiplier cells. In order to achieve high voltage gain, the proposed converter can increase the output voltage level using the voltage multiplier unit. The voltage stress across the semiconductors will be decreased compared to SEPIC, conventional boost converter. Therefore, using only one switch with lower resistance RDS(on), the overall efficiency of the proposed converter is increased significanly. In order to verify the theoretical analysis of the proposed converter and its accurate operation, a 150 W prototype operating at 25 kHz is built and tested

Simulation of TI-SEPIC Converter for BLDC Motor Drives

Power Factor Correction (PFC) is one of the research areas in the field of power electronics due to the enormous power required in various industrial applications. In this work, a SEPIC converter with the Tapped Inductor model which is operated in Discontinuous current Conduction Mode (TI-SEPIC- DCM) is proposed for a BLDC Drive. The proposed TI-SEPIC-DCM also improves the voltage gain with the help of voltage multiplier cell and charge pump circuit. It also helps in attaining the ZVS and ZCS, which results in higher switching frequency range and reduction in size reduction. Moreover, a third order harmonic reduction control loop is also proposed to attain a better third order harmonic elimination. The proposed work has been simulated using MATLAB simulink and the results are also validated

Voltage multiplier integrated HID ballast and the application of triple insulated wire in the design of igniter transformer

Author name used in this publication: K. W. E. ChengPower Electronics Research CentreRefereed conference paper2006-2007 > Academic research: refereed > Refereed conference paperVersion of RecordPublishe

A New Structure of High Voltage Gain SEPIC Converter for Renewable Energy Applications

The paper proposes a new structure of SEPIC with high voltage gain for renewable energy applications. The proposed circuit is designed by amalgamating the conventional SEPIC with a boosting module. Therefore, the converter benefits from various advantages that the SEPIC converter has, such as continuous input current. Also, high voltage gain and input current continuity make the presented converter suitable for renewable energy sources. The modified SEPIC converter (MSC) provides higher voltage gain compared to the conventional SEPIC and recently addressed converters with a single-controlled switch. The analysis of voltage gain in continuous current mode (CCM) and discontinuous current mode (DCM) is analyzed by considering the non-idealities of the semiconductor devices and passive components. The selection of the semiconductor devices depending on the voltage-current rating is presented along with the designing of reactive components. The numerical simulation and experimental work are carried out, and the obtained results prove the feasibility of the MSC concept and the theoretical analysis.This work was supported by the National Priorities Research Program (NPRP) through the Qatar National Research Fund (a member of the Qatar Foundation) under Grant X-033-2-007.Scopu

Survey of DC-DC Non-Isolated Topologies for Unidirectional Power Flow in Fuel Cell Vehicles

The automobile companies are focusing on recent technologies such as growing Hydrogen (H2) and Fuel Cell (FC) Vehicular Power Train (VPT) to improve the Tank-To-Wheel (TTW) efficiency. Benefits, the lower cost, `Eco\u27 friendly, zero-emission and high-power capacity, etc. In the power train of fuel cell vehicles, the DC-DC power converters play a vital role to boost the fuel cell stack voltage. Hence, satisfy the demand of the motor and transmission in the vehicles. Several DC-DC converter topologies have proposed for various vehicular applications like fuel cell, battery, and renewable energy fed hybrid vehicles etc. Most cases, the DC-DC power converters are viable and cost-effective solutions for FC-VPT with reduced size and increased efficiency. This article describes the state-of-the-art in unidirectional non-isolated DC-DC Multistage Power Converter (MPC) topologies for FC-VPT application. The paper presented the comprehensive review, comparison of different topologies and stated the suitability for different vehicular applications. This article also discusses the DC-DC MPC applications more specific to the power train of a small vehicle to large vehicles (bus, trucks etc.). Further, the advantages and disadvantages pointed out with the prominent features for converters. Finally, the classification of the DC-DC converters, its challenges, and applications for FC technology is presented in the review article as state-of-the-art in research

The voltage-controlled compensation ramp: A new waveshaping technique for power factor correctors

IEEE Applied Power Electronics Conference (APEC) (27. 2008. Austin, Texas)This paper deals with a new control method for Power Factor Correctors. Control is carried out by a standard IC controller for peak current-mode dc-dc converters, with only an additional compensation ramp generator and peak detector. Neither an analog multiplier nor an input voltage sensor is needed to achieve quasi-sinusoidal line waveforms, which makes this method very attractive. The method is similar to the one-cycle control method, but can be very easily adapted for use with topologies different to the boost converter, i.e. flyback, buck-boost, SEPIC Cuk and Zeta topologies. Moreover, as the line current is cycle-by-cycle controlled, the resulting input current feedback loop is extremely fast, thus allowing the use of this type of control with high frequency line