Cryogenic power electronics at megawatt-scale using a new type of press-pack IGBT

Graber, Lukas; Saeedifard, Maryam; Mauger, Mickael J.; Yang, Qichen; Park, C; Niebur, T; Pamidi, Sastry; Steinhoff, Stefan

doi:10.1088/1757-899x/279/1/012011

Cited by 19 publications

(7 citation statements)

References 11 publications

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“…To avoid these additional masses, ideally, the power electronics should operate at the same temperature as the superconducting machines and the HTS power cables. Secondly, it has been shown that lowering the operating temperature affects also the performance of the devices themselves [22].…”

Section: Cryogenic Power Electronicsmentioning

confidence: 99%

A holistic system approach for short range passenger aircraft with cryogenic propulsion system

Boll

Corduan

Biser

et al. 2020

Supercond. Sci. Technol.

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Currently, hybrid-electric aircraft are under investigation as one possible solution to reduce the emissions of the aviation industry according to Flightpath 2050 of the European Union. To meet the drive train's requirements on low mass while aiming for highest efficiency, superconducting technologies are regarded as a key enabling technology for drive train powers of several tens of megawatts. Within the German nationally funded project TELOS an exemplary mission profile and the physical measures of a 220-passenger aircraft are used to derive the requirements for a cryogenic-cooled serial hybrid-electric propulsion system. To optimize the total system performance, we subsequently evaluated the superconducting and cryogenic-cooled components by using computationally fast, analytical models. This approach allows quantifying the system performance by using component technologies being available today. In particular, the system performance of geared drive to direct drive propulsion units are compared and the influence of the DC bus voltage and the electric frequencies of the AC circuits on the mass and the efficiency of the drive trains are analysed.

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Section: Cryogenic Power Electronicsmentioning

confidence: 99%

A holistic system approach for short range passenger aircraft with cryogenic propulsion system

Boll

Corduan

Biser

et al. 2020

Supercond. Sci. Technol.

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“…Joints of dissimilar materials give different combinations of mechanical and metallurgical characteristics in a product. Thus, bimetallic joints [ 12 , 13 , 14 , 15 , 16 , 17 ] are necessary, especially in a vacuum [ 18 , 19 , 20 , 21 , 22 , 23 ] and cryogenic systems [ 24 , 25 , 26 , 27 ]. Because of the unique combination of distinct properties, copper/stainless-steel bimetals are in great demand [ 28 , 29 , 30 , 31 , 32 , 33 , 34 ].…”

Section: Introduction—joining Of Copper To Stainless Steel Bimetallic...mentioning

confidence: 99%

The Joining of Copper to Stainless Steel by Solid-State Welding Processes: A Review

et al. 2022

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Joining immiscible materials such as copper and stainless steel together is a significant concern due to distinct mechanical and metallurgical properties across the joint line, such as melting points, the coefficient of linear thermal expansion, and thermal conductivity. The joint properties of copper to stainless steel welds are in great demand for various mechanical components of the international thermonuclear experimental reactor, ultra-high vacuum system, plan wave linear-accelerator or linac structure, and heat exchanger. These dissimilar-metals joints offer excellent flexibility in design and production, leading to a robust structure for many cutting-edge applications. Hence, the present article reviews the copper to stainless steel joining mechanism under different solid-state processing conditions. The present understanding says that defect-free strong joints between the dissimilar metals are systematically possible. Apart from this understanding, the authors have identified and highlighted the gaps in the research exploration to date. Moreover, a sustainable methodology to achieve a desirable weld of copper to stainless steel depends on favorable processing conditions.

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“…al. [10][11][12][13], and many other researchers have shown the enhanced efficiency of the various power converters at cryogenic temperature by immersion cooling concept [6,[14][15][16][17][18][19][20]. Without cryogenic fuels, immersion cryogenic cooling may not be adopted for power converters in electric aircraft with longer travel times, and cryocoolers are needed for associated MW-class power converters.…”

Section: Introductionmentioning

confidence: 99%

Conceptual design of a wide band gap based cryogenically cooled MW-class inverter

Kar

Reddy

Rajashekara

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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The increasing need for higher power density and closer integration of power subsystems consisting of superconducting motors/generators, degaussing coils, energy storage modules, and cables leads one to consider the merits of refrigerating the associated power electronics down to cryogenic temperatures. High temperature superconducting (HTS) components combined with cryogenic power converters resulting in high power density power conversion systems will have a significant effect on several industrial, commercial, transportation, and renewable energy applications. Cryogenic power converters provide promising benefits over their room temperature counterparts in terms of reduced size and weight due to increased power density, improved efficiency, switching speed, and reliability. Integration could result in significant weight and space savings for the overall system. In this paper, a conceptual design study on the wide-bandgap-based (especially SiC and GaN) MW-class power inverter/converter is reported. Based on the total power loss of the designed converter, different cryogenic cooling strategies are proposed. The cooling power requirements, cooler mass, the cooler cost is evaluated based on the operating temperature of MW-class power converter. Finally, a power density comparison for different types of conventional power applications and HTS applications together with MW-class power converters is presented. The future of the cryogenically cooled power electronics system together with superconducting power devices is described for large-scale applications such as for future electric aircraft.

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Cryogenic power electronics at megawatt-scale using a new type of press-pack IGBT

Cited by 19 publications

References 11 publications

A holistic system approach for short range passenger aircraft with cryogenic propulsion system

A holistic system approach for short range passenger aircraft with cryogenic propulsion system

The Joining of Copper to Stainless Steel by Solid-State Welding Processes: A Review

Conceptual design of a wide band gap based cryogenically cooled MW-class inverter

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