Patent ID: 9559595
Date: 2017-01-31
CPC Classifications: H02M

Claim:
1. A multi-level DC/DC converter comprising n conversion stages, n being greater than or equal to 2, said converter being adapted to transfer power in bidirectional manner between at least one individual DC voltage source and a DC voltage network source, the voltage (V out-total ) of said network source being greater than that of each of said individual sources, each of the n conversion stages comprising: a converter module adapted to transfer power in bidirectional manner between one of the individual DC voltage sources and said DC voltage network source, said converter module comprising a transformer having a primary winding and a secondary winding and leakage inductance, the transformation ratio (m) of said transformer being greater than 1, said converter module further comprising a first converter and a second converter, each of said converters containing a plurality of gate-controlled bidirectional switches in a single-phase bridge configuration for converting a DC voltage into an AC voltage, said first converter being connected to the terminals of said primary winding, said second converter being connected to the terminals of said secondary winding, said primary winding having at its terminals a first AC voltage the second converters of each of the n conversion stages being placed in parallel, the sum (V