Novel transformer connection to improve current sharing in high current DC rectifiers

Olivier, G.; April, G.-E.; Ngandui, É.; Guimaraes, C.A.M.

doi:10.1109/ias.1993.299018

Cited by 27 publications

(4 citation statements)

References 1 publication

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“…Conventionally, the line frequency isolated transformer followed by diode rectifier, thyristor rectifier, and diode/chopper hybrid rectifier are employed in many industries [4][5][6]. Further, a large output filter inductance is utilized to limit the rate of the output current rise to prevent the rapid load changes.…”

Section: Introductionmentioning

confidence: 99%

Multiphase High-Frequency Isolated DC–DC Converter for Industrial Applications

Maurya¹,

Srivastava²,

Agarwal³

2014

International Journal of Emerging Electric Power Systems

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Industrial applications such as welding, plasma cutting, and surface hardening require a large DC current at low voltage. In such applications, the rating of power supply varies from few kilowatts to hundreds of kilowatts. The power supply employs in such applications particularly in arc welding process is expected to operate from open-circuit (no-load) to short-circuit (when the electrode sticks to the workpiece for a short span of time) quickly. In this paper, high-frequency isolated multiphase DC-DC converter is proposed which is well suited for aforementioned applications. Based on mathematical analysis, a simulation study with 5 kW, 5 V/1,000 A proposed model is carried out using Simulink block set and Sim Power System tool box and its performances are evaluated under symmetrical control methods. To verify the simulation results, scaled prototype model of rating 1.5 V/100 A is developed and tested with aforementioned control method under different operating conditions. In comparison with conventional welding power supply employed in many industries, the performance of proposed converter is improved significantly in terms of size and weight, efficiency and dynamic response.

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Section: Introductionmentioning

confidence: 99%

Multiphase High-Frequency Isolated DC–DC Converter for Industrial Applications

Maurya¹,

Srivastava²,

Agarwal³

2014

International Journal of Emerging Electric Power Systems

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“…Static power converters have seen an iiicreased usage since their first introduction to the industry Of these, phase controlled rectifiers have been the most widely used in various applications [ 1].. [3]. Industrial rectifjring ;and dc drives have helped this rectifier build it's unique fanu: among engineers.…”

Section: Introductionmentioning

confidence: 99%

Staggered phase controlled rectifier: a novel structure to achieve high power factor

Wiechmann

Burgos

Rodríguez

PESC97. Record 28th Annual IEEE Power Electronics Specialists Conference. Formerly Power Conditioning Specialists Conference 19

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This paper proposes a staggered phase controlled rectifier. The converter achieves a high! input power factor throughout the whole output range. Reduces the reactive power consumption by 75 YO and the input filter's rating by 85 YO compared to industry standard rectifiers. These while keeping a low input current total harmonic distortion. It also eliminates the need fcw a reactive power controller, as it requires a single fixed capacitor bank for filtering. The paper presents the converter's design procedure, simulation and experimenlal results, together with a full evaluation performed in an electrowinning plant. These prove the converter's excelilent performance.

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“…The current state of art suggests the application of multipulse converters for achieving cancellation of input harmonic current at the need of magnetic circuits such as, phase-shifting transformers, interphase transformers, current balancing transformers and harmonic blocking transformers with the obvious drawback of complex design of heavy, bulky and expensive custom made equipments [4] - [10]. In addition, elimination of interphase transformers is particulary desirable when there are preexisting harmonic voltages in the three-phase power source.…”

Section: Introductionmentioning

confidence: 99%

Programmable PFC Based Hybrid Multipulse Power Rectifier for Utility Interface of Power Electronic Converters

Freitas

Coelho

Finazzi

et al.

IEEE 36th Conference on Power Electronics Specialists, 2005.

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In this paper it is proposed a novel hybrid threephase rectifier capable to achieve high input power factor (PF), and low total harmonic distortion in the input currents (T HDI ). The proposed hybrid high power rectifier is composed by a standard three-phase 6-pulses diode rectifier (Graetz bridge) with a parallel connection of single-phase Boost rectifiers in each three-phase rectifier leg. Such topology results in a structure capable of programming the input current waveform and providing conditions for obtaining high input power factor and low harmonic current distortion. In order to validate the proposed hybrid rectifier, this paper describes its principles of operation, with detailed experimental results and discussions on power rating of the required Boost converters as related to the desired total harmonic current distortion. It is demonstrated that only a fraction of the output power is processed through the Boost converters, making the proposed solution economically viable for very high power installations, with fast pay back of the investment. Moreover, retrofitting to existing installations is also feasible since the parallel path can be easily controlled by integration with the existing dc-link. A prototype rated at 6 kW has been implemented in laboratory and fully demonstrated its operation, performance and feasibility to high power applications.

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Novel transformer connection to improve current sharing in high current DC rectifiers

Cited by 27 publications

References 1 publication

Multiphase High-Frequency Isolated DC–DC Converter for Industrial Applications

Multiphase High-Frequency Isolated DC–DC Converter for Industrial Applications

Staggered phase controlled rectifier: a novel structure to achieve high power factor

Programmable PFC Based Hybrid Multipulse Power Rectifier for Utility Interface of Power Electronic Converters

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