Inductive power transfer for auxiliary power of medium voltage converters

Wunsch, Bernhard; Bradshaw, Jonathan; Stevanović, I.; Canales, Francisco; Van-der-Merwe, Wim; Cottet, Didier

doi:10.1109/apec.2015.7104710

Cited by 20 publications

(6 citation statements)

References 6 publications

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“…This results in a very compact and efficient rectifier for multi-MHz systems. The diode losses are lower than for full bridge diode rectifier solutions that are reported as a significant contribution to total losses [25], especially for low output-power designs.…”

Section: A Proposed Converter Structurementioning

confidence: 80%

“…Several publications have also investigated the use of inductive power transfer (IPT) systems as a method of fulfilling the insulation requirements [22]- [25]. Both single converter to single load [22], [25] and single converter to multiple loads [23], [24] have been demonstrated. IPT systems uses resonant converters to transfer power by coreless transformers that have poor coupling coefficients.…”

Section: Introductionmentioning

confidence: 99%

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Optimized Design of Multi-MHz Frequency Isolated Auxiliary Power Supply for Gate Drivers in Medium-Voltage Converters

Spro

Lefranc

Park

et al. 2020

IEEE Trans. Power Electron.

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This paper presents the design and optimisation of a suitable topology for an isolated DC-DC auxiliary power supply with high isolation voltage and low coupling capacitance. The converter consists of a GaN HEMT inverter operating at 6.78 MHz, an LCC resonance tank and a class E low dv/dt rectifier. Furthermore, the galvanic isolation is implemented using a coreless planar transformer that enables higher insulation voltage with similar or better converter efficiency compared to designs using magnetic material. An analytical design methodology is developed, however, SPICE investigations show that optimal designs might lie outside the validity of the design equations. Consequently, a virtual prototyping tool is developed based on a genetic algorithm with numerical simulations and, in turn, is used to optimise the converter. The optimisation algorithm maximises the converter efficiency while minimising the transformer size. Prototypes are constructed based on the resulting Pareto front. Experimental results show the validity of the simulated results. Prototypes transferring power up to 15 W with a peak efficiency of 81% are shown. The selected topology enables insulating voltages exceeding 40 kV and coupling capacitances below 10 pF.

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Section: A Proposed Converter Structurementioning

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Optimized Design of Multi-MHz Frequency Isolated Auxiliary Power Supply for Gate Drivers in Medium-Voltage Converters

Spro

Lefranc

Park

et al. 2020

IEEE Trans. Power Electron.

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“…The IPT system can be optimized with respect to voltage stability, efficiency, component stress, and complexity. An operating concept without control feedback is shown in [47].…”

Section: ) Iptmentioning

confidence: 99%

“…Since system voltages of MV systems are in the range of 1-52 kV [66], also induction-based concepts are viable. Several external GDU and APS solutions based on special isolation transformer designs [5], [7], [10] and IPT systems [47], [49], [84] have been reported for MV applications such as large motor drives, and transformer-coupled STATCOMs [66]. As regards FACTS applications, a fast start-up speed is beneficial [56], which can be provided by all external APS concepts as shown in Fig.…”

Section: A MV Convertersmentioning

confidence: 99%

Auxiliary Power Supplies for High-Power Converter Submodules: State of the Art and Future Prospects

Heinig

Jacobs

Ilves

et al. 2022

IEEE Trans. Power Electron.

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Recent developments in medium-voltage (MV) silicon and silicon carbide (SiC) power semiconductor devices are challenging state-of-the-art converter and auxiliary power supply (APS) designs. The APS is an important converter component, which energizes the gate-drive units and, therefore, has an influence on the overall reliability and efficiency of the converter system. There has, however, been comparably little research on how the APS of high-power converter submodules can be realized, in particular for high-voltage (HV) applications. New, or improved, solutions may build on state-of-the-art topologies in the near future, but utilize MV SiC technology in the APS circuit itself to enable improved efficiency, reliability, simplicity, and compactness. Externally-fed APS concepts could provide several further advantages. Their various benefits on converter and system level may enable them to be a competitive solution for future APS concepts. Especially light-based power supply systems are considered most useful since they offer extreme voltage isolation capability and immunity to electromagnetic interference.This article presents a review of the wide range of solutions for APSs, possible implementation options, and the most important design considerations. The different solutions are evaluated in a qualitative fashion, providing an overview of available APS concepts with regard to the requirements for high-power converter applications.

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“…For externally powered methods, APS is powered from outside the main power system, from low-voltage earthed source. These usually utilize transformers with high-voltage isolation capabilities [45] , or wireless power transfer [46] . Benefits are reflected in power independence (attaining higher reliability by making sure the gate-driver and controller are powered and not related to state of power-cell), high-insulation capabilities, and flexible mechanical structure.…”

Section: Auxiliary Network Architecturementioning

confidence: 99%

Design of a 10 kV SiC MOSFET-based high-density, high-efficiency, modular medium-voltage power converter

Mocevic

Fan

et al. 2022

iEnergy

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Simultaneously imposed challenges of high-voltage insulation, high dv/dt, high-switching frequency, fast protection, and thermal management associated with the adoption of 10 kV SiC MOSFET, often pose nearly insurmountable barriers to potential users, undoubtedly hindering their penetration in medium-voltage (MV) power conversion. Key novel technologies such as enhanced gatedriver, auxiliary power supply network, PCB planar dc-bus, and high-density inductor are presented, enabling the SiC-based designs in modular MV converters, overcoming aforementioned challenges. However, purely substituting SiC design instead of Sibased ones in modular MV converters, would expectedly yield only limited gains. Therefore, to further elevate SiC-based designs, novel high-bandwidth control strategies such as switching-cycle control (SCC) and integrated capacitor-blocked transistor (ICBT), as well as high-performance/high-bandwidth communication network are developed. All these technologies combined, overcome barriers posed by state-of-the-art Si designs and unlock system level benefits such as very high power density, high-efficiency, fast dynamic response, unrestricted line frequency operation, and improved power quality, all demonstrated throughout this paper.

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Inductive power transfer for auxiliary power of medium voltage converters

Cited by 20 publications

References 6 publications

Optimized Design of Multi-MHz Frequency Isolated Auxiliary Power Supply for Gate Drivers in Medium-Voltage Converters

Optimized Design of Multi-MHz Frequency Isolated Auxiliary Power Supply for Gate Drivers in Medium-Voltage Converters

Auxiliary Power Supplies for High-Power Converter Submodules: State of the Art and Future Prospects

Design of a 10 kV SiC MOSFET-based high-density, high-efficiency, modular medium-voltage power converter

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