Characterization of a 6.5kV IGBT for medium-voltage high-power resonant DC-DC converter

Dujić, Dražen; Steinke, Gina Kristin; Bianda, Enea; Lewdeni-Schmid, Silvia; Zhao, Chuanhong; Steinke, J.K.

doi:10.1109/apec.2013.6520487

Cited by 17 publications

(14 citation statements)

References 8 publications

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“…Taking into account the waveforms of the voltages v a and v b , solving (12) and using the same analysis approach described for the ideal case (the intermediates steps are omitted), the variation of the current i c can be calculated by (13), while the power transferred to the port c is computed (14).…”

Section: Influence Of the Transformer Parasitic Elementsmentioning

confidence: 99%

“…The main challenge of this architecture is the dc-dc conversion stage, since it has strict requirements: high rated power, high current capability in LV side, high voltage capability in HV side, high frequency isolation and high efficiency. To meet all requirements, two solutions have been widely investigated: the first one is to use a converter with high voltage rating devices [10]- [12], while the second one is based on the modular concept, in which several modules are used to share the total voltage and power among them [2], [13]- [15]. Although the modular solution presents a high number of components, it has several advantages, such as: low dv/dt (low EMI emission and isolator stress), possibility to use standard low voltage rating devices and also modularity, which allows to implement redundant strategy to increase the fault tolerance and reliability.…”

Section: Introductionmentioning

confidence: 99%

“…Several converters have been investigated to be used as module of the main core of the SST, but the Dual-ActiveBridge (DAB) and the Series-Resonant converter (SRC) have received more attention, due to their advantages of softswitching, high efficiency and high power density [13]- [19].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Quad-Active-Bridge DC–DC Converter as Cross-Link for Medium-Voltage Modular Inverters

Costa

Buticchi

Liserre

2017

IEEE Trans. on Ind. Applicat.

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Abstract-One of the main challenges of the solid-state transformer (SST) lies in the implementation of the dc-dc stage. In this paper, a Quadruple-Active-Bridge (QAB) dc-dc converter is investigated to be used as basic module of a modular threestage SST. Besides the feature of high power density and softswitching operation (also found in others converters), the QAB converter provides a solution with reduced number of high frequency transformers, since more bridges are connected to the same multi-winding transformer. To ensure soft-switching for the entire operation range of the QAB converter, the triangular current mode modulation strategy, previously adopted for the dual-active-bridge converter, is extended to the QAB converter. The theoretical analysis is developed considering balanced (equal power processed by the MV cells) and unbalanced (unequal power processed by the MV cells) conditions. In order to validate the theoretical analysis developed in the paper, a 2 kW prototype was built and experimented.

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Section: Influence Of the Transformer Parasitic Elementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Quad-Active-Bridge DC–DC Converter as Cross-Link for Medium-Voltage Modular Inverters

Costa

Buticchi

Liserre

2017

IEEE Trans. on Ind. Applicat.

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“…In order to achieve high efficiency, a resonant LLC topology is used and operated in the open-loop mode below resonant frequency [8]. Since the full bi-directionality of the converter implies certain symmetry requirements, the resonant tank is not located on a single port, like in [5], but is split between all three ports.…”

Section: A Multiport Llc Resonant Stagementioning

confidence: 99%

A multiport isolated DC-DC converter

Tran

Dujić

2016

2016 IEEE Applied Power Electronics Conference and Exposition (APEC)

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Abstract-This paper presents a multi-port isolated DC-DC converter for DC applications. A three-port structure is presented, characterized with full bidirectional power flow and simple control. Galvanic isolation is achieved by means of a multi-winding medium frequency transformer which is a part of a resonant LLC converter. To provide controllable power exchange with external DC ports, two out of three ports are equipped with additional bidirectional buck/boost stages. They serve to provide active power flow control, while the inner resonant stage provides galvanic isolation, operates in the open-loop and adapts its mode of operation based on the actual power flow. Both switched mode and rea-time hardware-in-the-loop simulations, with control algorithm deployed on the digital signal processor, are used to verify and demonstrate various operational modes.

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“…Because of its characteristic of output voltage regulation in open loop, associated to its feature of soft-switching, the converter became very popular in Smart Transformer (ST) [12] application. Hence, this converter has been used to implement the dc-dc stage of ST's architectures based on modular [13]- [15] and also non-modular [16] concept.…”

Section: Introductionmentioning

confidence: 99%

Highly efficient and reliable DC-DC converter for smart transformer

Costa

Buticchi

Liserre

2017

2017 IEEE Applied Power Electronics Conference and Exposition (APEC)

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Abstract-The series-resonant converter (SRC) has been used in several application and it recently became popular for Smart Transformers (STs). In this application, the efficiency and reliability are of paramount importance. Although many papers have addressed the design challenges to improve the converter efficiency, discussions about the reliability are still missing in literature. In this context, this paper presents a design procedure focusing on the efficiency and reliability improvement of the SRC for ST application. To improve the efficiency, losses modeling in all components is carefully carried out. Additionally, SiliconCarbide (SiC) MOSFETs are used to reduce the conduction and switching losses. The reliability is addressed on the converter design by taking the lifetime of the resonant capacitor and the stress on the main components. Experimental results obtained for the optimized 10 kW series resonant converter has shown an efficiency of 98.61%.

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Characterization of a 6.5kV IGBT for medium-voltage high-power resonant DC-DC converter

Cited by 17 publications

References 8 publications

Quad-Active-Bridge DC–DC Converter as Cross-Link for Medium-Voltage Modular Inverters

Quad-Active-Bridge DC–DC Converter as Cross-Link for Medium-Voltage Modular Inverters

A multiport isolated DC-DC converter

Highly efficient and reliable DC-DC converter for smart transformer

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