Multi-phase Converter for Wide Range of Input Voltages with Integrated Filter Inductor

Stadler, Michael; Pforr, Johannes

doi:10.1109/epepemc.2006.283396

Cited by 4 publications

(4 citation statements)

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“…This limitation becomes even more severe, if the single-phase converter is replaced by a multi-phase converter with several half-bridges connected in parallel and where the half-bridges are operated with an interleaving concept and having their own output inductors. However a reduction of the phase ripple currents can be achieved by using multi-phase converters with coupled inductors in the first filter stage [7], [8].…”

Section: ) Cost Optimized Design Of the Single Filter Stagesmentioning

confidence: 99%

Filter Optimization for multi-phase DC-DC converter in automotive energy backup system

Städler

Utz

Pforr

2009

2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition

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Cascaded filters offer a possibility to minimize the size of the filter components due to their increased attenuation at high frequencies. A cost optimized design of a cascaded filter of a multi-phase converter for an automotive energy back-up system will be shown, that results in small values of the inductances. However, the decreasing inductance values results in increasing current ripples in the first filter stage. The implementation of coupled inductors helps to reduce the current ripples of the single phase currents significantly and achieves a cost optimized design with increased converter efficiency. The influence of tolerances on the ripple cancelation phenomenon in multi-phase converters and coupled inductors on the cascaded filter design will be analyzed. The theoretical predictions are in good correlation with the experimental results obtained from a full-size prototype converter.

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Section: ) Cost Optimized Design Of the Single Filter Stagesmentioning

confidence: 99%

Filter Optimization for multi-phase DC-DC converter in automotive energy backup system

Städler

Utz

Pforr

2009

2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition

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“…5 shows the operation principle of the conventional not coupled inductors and the proposed coupled inductors. The main advantages of the coupled inductors are the significantly reduced phase-ripple currents [6]. The stray path represented by the center leg can therefore be decreased, reducing the dc-flux in the core and allowing therefore a significant reduction of the core size.…”

Section: B Analysis Of the Boost Convertermentioning

confidence: 99%

Comparison of topologies to drive the machine of an automotive electrical power steering with higher voltage levels

Hackner

Pforr

2009

2009 IEEE Energy Conversion Congress and Exposition

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A comparison between different inverter topologies has been carried out and their suitability assessed for application as a driver unit of the asynchronous machine for an automotive electrical power steering system. The proposed topologies provide higher voltage levels to the machine compared to the voltage levels obtained directly from the automotive electrical power net and also provide a reduced slope of the input current drawn from the automotive electrical power net by utilizing an additional double layer capacitor as integrated energy storage device. The comparison includes an inverter with additional boost converter, an inverter with integrated boost converter and a third topology with integrated boost converter and modified driving scheme. A detailed analysis has been performed to determine the overall losses and most suitable topologies have been built and tested to prove theoretical predictions. Experimental results are in good correlation with theoretical predictions.

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“…The driving signal of each cell is phase shifted. This structure allows to reduce by a factor N (N is the number of cells) the output current ripple and increases the apparent switching frequency by the same factor (N*F switching ) [6]. For a defined output ripple frequency, the interleaved structure needs a smaller switching frequency than traditional power converters.…”

Section: A Interleaved Structurementioning

confidence: 99%

Fault tolerance on interleaved inverter with magnetic couplers

Guépratte

Frey

Jeannin

et al. 2010

2010 Twenty-Fifth Annual IEEE Applied Power Electronics Conference and Exposition (APEC)

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Abstract-The paper focuses on a new control strategy for improving the availability of power electronic converters based on interleaved structures. By using this strategy, the power electronic converters can continue to work (with reduced output power) in case of power component failure. The paper describes how to adapt the magnetic output filtering structure for this original control strategy. This structure is based on a monolithic coupler or a coupling transformer. Which are usually employed to minimize in a significant way the mass of the converters. They are normally sized to work with a fixed number of phases. Our control strategy induces new constraints on magnetic component, especially saturation problems. To reduce this problem some extra switch are added. Finally an experimental Power electronic converter driven by an FPGA is presented with the experimental results. It shows some experimental results with a 6 phases converter who work with 5 or 4 phases, to simulate one or two converter leg breakdown.

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Multi-phase Converter for Wide Range of Input Voltages with Integrated Filter Inductor

Cited by 4 publications

References 0 publications

Filter Optimization for multi-phase DC-DC converter in automotive energy backup system

Filter Optimization for multi-phase DC-DC converter in automotive energy backup system

Comparison of topologies to drive the machine of an automotive electrical power steering with higher voltage levels

Fault tolerance on interleaved inverter with magnetic couplers

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