High Power Conversion Applications Research Articles

Simulation and Implementation of Interleaved Boost DC-DC Converter for Fuel Cell Application

This paper deals with a boost dc-dc converter for fuel cell application. In fuel cell e lectric vehicles application, a high power boost dc-dc converter is adopted to adjust the output voltage, current and power of fuel cell engine to meet the vehicle requirements. One of challenge in designing a boost converter for high power application is how to handle the high current at the input side. In this paper an interleaved boost dc-dc converter is proposed for current sharing on high power application. Moreover, this converter also reduces the fuel ripple current. Performance of the interleaved boost converter is tested through simulation and experimental results. Keywords: component; Interleaved Boost Converter; Fuel Cell Electric Vehicle; high power application. DOI: http://dx.doi.org/10.11591/ijpeds.v1i2.126

Two for the Road: Books on Converters and Electrical Energy (review of "Self-Commutating Converters for High Power Applications; Arrillaga, J. et al; 2009) [Book Reviews

This book succeeds in demonstrating the potential industrial applications of the multilevel dc reinjection schemes for ultra-high-current or ultra-high-voltage applications using computer simulations. The book is suitable for researchers with an interest in the future high-power converters.

Three-Phase Three Level, Soft Switched, Phase Shifted PWM DC–DC Converter for High Power Applications

A new three-phase, three-level dc to dc phase shifted pulsewidth modulation (PWM) converter is proposed for high power and high input voltage applications. Output voltage is controlled by incorporating phase shift PWM. Clocked gate signals of each leg are phase shifted by 2pi/3 from each other. Major features of the converter include: (1) outer two switches of each leg are turned on and off as zero voltage switching, (2) inner two switches of each leg are turned on and off as zero current switching, and (3) this is achieved without involving any extra passive or active components. The secondary side of the converter is of center tapped full-wave current tripler type. This results in an increase of ripple frequency by a factor of six, leading to a significant reduction in size of the output filter. In order to obtain behavioral and performance characteristics of the proposed converter topology, detailed analytical and simulation studies are carried out. Finally the viability of the scheme is confirmed through detailed experimental studies on a laboratory prototype developed for the purpose.

A Novel ZVS DC/DC Converter for High Power Applications

This paper presents a novel zero voltage switch (ZVS) pulse-width modulation (PWM) DC/DC converter for high power, high output voltage applications. By using two active switches in the secondary side of a transformer, the proposed converter achieves not only ZVS of the active switches in the entire load ranges but also soft commutation of the output rectifier diodes. The proposed topology has simple structure and control strategy. Simulation results and experimental results of a 2.8 kW 200 kHz DC/DC converter are presented.

New pulse multiplication technique based on six-pulse thyristor converters for high-power applications

A new pulse multiplication technique based on six-pulse thyristor converters is proposed in this paper. With the proposed technique, 12-pulse, 18-pulse, and 24-pulse operations have been obtained both on the input current and on the output voltage. A control strategy over the whole range of phase angle is provided along with sophisticated input current and output voltage analysis. Experimental results from a laboratory prototype verify the proposed theory.

IGBT based zero voltage transition full bridge PWM converter for high power applications

A novel zero-voltage-transition (ZVT) full-bridge (FB) PWM converter for high power applications is proposed. An auxiliary resonant network which consists of two small switches (10-20% of main switches) and one small inductor provides zero-voltage-switching (ZVS) for wide line and load ranges. This allows addition of external capacitors to the switches maintaining reasonable ZVS range, and IGBTs can be used instead of MOSFETs for the main switches. In addition, the proposed converter has advantages over the ZVS-FB-PWM converters such as minimum device voltage and current stresses, negligible duty cycle loss, and no severe parasitic ringing on the secondary, which enables the proposed converter to handle higher voltage and power with lower cost. Operation, features and design considerations are presented and verified experimentally on a 2 kW, 85 kHz IGBT based prototype.

A three-phase soft-switched high-power-density DC/DC converter for high-power applications

Three DC/DC converter topologies suitable for high-power-density high-power applications are presented. All three circuits operate in a soft-switched manner, making possible a reduction in device switching losses and an increase in switching frequency. The three-phase dual-bridge converter proposed is shown to have the most favorable characteristics. This converter consists of two three-phase inverter stages operating in a high-frequency six-step mode. In contrast to existing single-phase AC-link DC/DC converters, lower turn-off peak currents in the power devices and lower RMS current ratings for both the input and output filter capacitors are obtained. This is in addition to smaller filter element values due to the higher-frequency content of the input and output waveforms. Furthermore, the use of a three-phase symmetrical transformer instead of single-phase transformers and a better utilization of the available apparent power of the transformer (as a consequence of the controlled output inverter) significantly increase the power density attainable.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

A 115-mm phi 6-kV 2500-A light-triggered thyristor

A 115-mm-diameter 6-kV 2500-A light-triggered thyristor developed for high-power converter applications and fabricated using ion implantation, large-diameter-element treatment, and cathode pattern design techniques is discussed. The device has an on-state voltage of 3.0 V at 7800 A, a minimum light-triggering power of 10 mW, a dv/dt capability of more than 3000 v/ mu s, and a turn-off time of less than 400 mu s.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>