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This paper presents a simple passive voltage balancing circuit for a modular DC/DC step-up converter for medium voltage (MV) DC grid in wind energy systems. The proposed auxiliary circuit is able to balance the capacitor voltages over a wide range of operating points. Regarding the converter, high frequency step-up resonant circuits with high gain rectifier modules are combined to form a modular step-up...
In this paper, a modular single stage step-up resonant converter with an extended soft-switching operating range is presented. A passive auxiliary circuit is employed to extend soft-switching operation over a wide range of operating points. Soft-switching operation allows using Silicon Carbide (SiC) MOSFETS and as a result higher switching frequency can be achieved. To reduce the number of conversion...
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