Series-parallel connection of DC-DC converter modules with active sharing of input voltage and load current

Bhinge, A.; Mohan, Ned; Giri, R.

doi:10.1109/apec.2002.989314

Cited by 63 publications

(24 citation statements)

References 3 publications

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“…10 (a), that the oscillation among the input voltage of each of the modules become much higher, its frequency increases and the IVS of this prototype is achieved less efficiently. This verifies the analysis in section III and expression (15). From Fig.…”

Section: B Experimental Resultssupporting

confidence: 56%

“…4. From (15) and Fig. 4, it can be seen that: if there is a difference between V i1 and V i2 as shown in (1), the resonances of C i1 and C i2 and L lk1 and L lk2 appear when all of the switches are turned on, and the oscillation frequency can be obtained in (16).…”

Section: B the Ivs Processmentioning

confidence: 99%

“…Each configuration has its own specific application areas. Generally, the ISOS converter is suitable for applications involving a high output voltage, while the ISOP converter can be used in applications where the output voltage is relatively lower [9]- [15]. Fig.…”

Section: Introductionmentioning

confidence: 99%

“…In [8], a two-module ISOP system has been implemented, using a charge control technique with input voltage feed forward. In [12], [15] and [16], three-loop control schemes have been used by sensing both the input voltage and the output current. In [19], a decoupled master/slave control for an ISOP converter was proposed to deal with low cost, high voltage auxiliary power supplies.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Input-Series Multiple-Output Auxiliary Power Supply Scheme Based on Transformer-Integration for High-Input-Voltage Applications

Tao¹,

Ben²,

Wei³

2012

Journal of Power Electronics

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In this paper, an input-series auxiliary power supply scheme is proposed, which is suitable for high input voltage and multiple-output applications. The power supply scheme is based on a two-transistor forward topology, all of the series modules have a common duty ratio, all the switches are turned on and off simultaneously, and the whole circuit has a single power transformer. It does not require an additional controller but still achieves efficient input voltage sharing (IVS) for each series module through its inherent transformer-integration strategy. The IVS process of this power supply scheme is analyzed in detail and the design considerations for the related parameters are given. Finally, a 100W multiple-output auxiliary power supply prototype is built, and the experimental results verify the feasibility of the proposed scheme and the validity of the theoretical analysis.

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Section: B Experimental Resultssupporting

confidence: 56%

Section: B the Ivs Processmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Input-Series Multiple-Output Auxiliary Power Supply Scheme Based on Transformer-Integration for High-Input-Voltage Applications

Tao¹,

Ben²,

Wei³

2012

Journal of Power Electronics

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show abstract

“…In [17], input-series and outputparallel (ISOP) connection has been implemented for a two-converter system, using a charge control scheme with input voltage feed forward. In an earlier ONR supported research, the authors have developed three different control schemes for the ISOP configuration [18][19][20].…”

Section: Advantages Of Input-series Connectionsmentioning

confidence: 99%

Towards a Fully Modular Power System Architecture for DC-DC Converters

Ledezma¹

2006

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The public reporting burden for this collection of information is estimated to average 1 hour per response, inPcluding the time for reviewing istructons, searching existing data sources, gathering and maintaining the data needed, ard completing and revrewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing the burden, to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subpect to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. Fully modular power system architecture for dc-dc conversion, where low-power, low-voltage (input and output) building block dcdc converters can be connected in any combination of series/parallel configurations at the output and/or at the input sides, has several advantages including increased reliability, standardization of design and components, higher power density and efficiency. An important component of such architecture is the autonomous, input series configuration with active input voltage and load current sharing, towards which this research project has made significant contributions. The major research tasks accomplished in this project are: 1. Development of control methods for input-series and output-series (ISOS) configuration with active voltage sharing; 2. Development of input-voltage share bus scheme for input-series, output parallel (ISOP) connection that makes the converter modules self-contained and identical, leading to fault tolerant capability; 3. Study on magnetic approaches to inputvoltace sharing for input-series connected convertersi and 4. development of interleaving techniQues for input series connected PLEASE DO NOT

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Input‐series‐output‐parallel connected modular high frequency isolated AC–AC converters with positive compensation of inner‐current loop

Sha

Liao

2016

IET Power Electronics

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A control strategy for input-series-output-parallel (ISOP) connected modular high frequency isolated AC-AC converter is proposed in this study. The circulating currents among all the constituent modules are avoided by the proposed pulse width modulation sequence generation method. Based on the revealed relationship between input voltage sharing (IVS) and output current sharing (OCS), a stable control strategy is proposed by using an output voltage loop and positive inner-current compensation loops. The individual input voltage sharing loops are eliminated. With the proposed control strategy, OCS or IVS can be achieved well for ISOP modular AC-AC converters under both steady and dynamic state, even in the case when the parameters of individual modules are mismatched. Simulation and experimental results are presented to verify the effectiveness of the control strategy.

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Series-parallel connection of DC-DC converter modules with active sharing of input voltage and load current

Cited by 63 publications

References 3 publications

Input-Series Multiple-Output Auxiliary Power Supply Scheme Based on Transformer-Integration for High-Input-Voltage Applications

Input-Series Multiple-Output Auxiliary Power Supply Scheme Based on Transformer-Integration for High-Input-Voltage Applications

Towards a Fully Modular Power System Architecture for DC-DC Converters

Input‐series‐output‐parallel connected modular high frequency isolated AC–AC converters with positive compensation of inner‐current loop

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