A critical evaluation of high power hard and soft switched isolated DC-DC converters

Aydemir, M. Timur; Bendre, A.; Venkataramanan, G.

doi:10.1109/ias.2002.1042731

Cited by 24 publications

(10 citation statements)

References 11 publications

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“…[3]- [6]). These can be classified into two groups, namely zero-voltage switching (ZVS) and zero-current-switching (ZCS), where the soft transitions are (most often) achieved by the use of an auxiliary circuit that creates some form of L-C resonance [7].…”

Section: Introductionmentioning

confidence: 95%

Comparative analysis of two zero-current switching isolated dc-dc converters for auxiliary railway supply

Deblecker

Moretti

Vallée

2008

2008 International Symposium on Power Electronics, Electrical Drives, Automation and Motion

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In modern railways coaches, the electrical separation between the high voltage side and the auxiliary equipments on the consumer side is realized by means of heavy and bulky 50 Hz transformers. In order to reduce the weight and size of the devices, today new power supply systems are proposed that consist in soft-switched isolated dc-dc converters with a lightweight medium frequency transformer and diverse output modules supplied by a common 600 V dc intermediate circuit. This paper aims to investigate in detail two such solutions of isolated dc-dc converters for auxiliary railway power supply where zerocurrent transitions are achieved for the primary inverter switches. A comparison based on several criteria (overall power rating, losses in power semiconductor devices, operation in the whole range of load, etc.) is presented.

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Section: Introductionmentioning

confidence: 95%

Comparative analysis of two zero-current switching isolated dc-dc converters for auxiliary railway supply

Deblecker

Moretti

Vallée

2008

2008 International Symposium on Power Electronics, Electrical Drives, Automation and Motion

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“…Furthermore, the loss predictions are a strong function of the accuracy of the physical models available for simulation, while most widely available semiconductor loss models are behavioral. It is known that the fidelity of loss simulations may vary by quite a wide factor in repeating actual thermal performance [13]. In contrast, the analytical approach to predicting power losses is a much more favored alternative due to its ability of fast profiling, based on readily available behavioral models for semiconductors.…”

Section: Introductionmentioning

confidence: 99%

Analytical Modeling of Semiconductor Losses in Matrix Converters

Wang

Venkataramanan

2006

2006 CES/IEEE 5th International Power Electronics and Motion Control Conference

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Analytical models for estimating semiconductor losses are commonly used for heatsink selection in the design process of power converters. While such models are established and widely known for different dc-dc converters, rectifiers and inverters, they have not been developed for matrix converters. Therefore, one has to resort to the use of numerical simulation for this purpose. Although numerical simulation is a straightforward approach as long as the power switching devices are properly modeled, it is typically time consuming and requires accurate physical models for the device. In this paper, an analytical approach to characterizing the semiconductor losses of the conventional matrix converter (CMC) and the indirect matrix converter (IMC) is presented. The analytical results are verified against the simulation results from a detailed numerical model under a wide variety of operating conditions.

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“…Comparative analysis of this topology with alternate dc-dc converter topologies has demonstrated the viability of the new topology [4]. A new multimodal control scheme that extends operating region while maintaining reduced magnetic component losses has been developed and implemented for the loss-limited full-bridge dc-dc converter.…”

Section: Discussionmentioning

confidence: 99%

“…Details of the power circuit design and steady-state operating conditions have been presented in [1]. A computer-simulation-based comparative evaluation of the proposed converter with other approaches for realizing such isolated high-power system indicates that the proposed approach provides superior performance [4] from a thermal point of view. …”

Section: Static Analysismentioning

confidence: 99%

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Dynamic analysis of loss limited switching full bridge DC-DC converter with multimodal control

Bendre

Venkataramanan²,

Divan³

APEC. Seventeenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.02CH37335)

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Abstract-Full-bridge dc-dc converters with one soft-switched leg and one hard-switched leg have recently been introduced as an attractive approach for realizing high-frequency power conversion at power levels greater than 100 kW. This paper presents a new variable-frequency multimodal control strategy for these converters for obtaining optimal operating characteristics. The controller extends the soft-switching operating region of the converter while lowering magnetic component core loss. Steady-state and dynamic analyses of the converter operation in the various modes are developed. Simulation and experimental results verifying the operation of the converter are presented.

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A critical evaluation of high power hard and soft switched isolated DC-DC converters

Cited by 24 publications

References 11 publications

Comparative analysis of two zero-current switching isolated dc-dc converters for auxiliary railway supply

Comparative analysis of two zero-current switching isolated dc-dc converters for auxiliary railway supply

Analytical Modeling of Semiconductor Losses in Matrix Converters

Dynamic analysis of loss limited switching full bridge DC-DC converter with multimodal control

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