Rheinisch-westfalische Technische Hochschule (rwth) Aachen

Johannes Voss

Rik W De Doncker

An electrical circuit comprising an n-port m-phase active bridge converter with n&#x2265;2 and m&#x2265;1, where each port can be operated as an input or an output port, wherein each of the n ports has m phase legs with multiple active switches with parallel connected snubber or resonant capacitors, whereby the n ports can convert a DC-voltage into an AC voltage, the n ports connected via an m-phase transformer or over m separate transformers each connected to each of the m phase legs of each of the n ports to transfer power between the ports, wherein an auxiliary circuit is connected to the transformers to convert a part of a transformer input voltage and energy via an auxiliary voltage source into a DC mid-point capacitor of a DC-link of at least one of the n-port m-phase active bridge converters to recharge the DC mid-point capacitor.

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Aachen, Germany

Johannes Voss