| CPC H02M 3/33584 (2013.01) [H02M 1/0058 (2021.05)] | 17 Claims |
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1. An electrical power converter, configured to connect a primary port with a secondary port, the primary port comprising a DC energy source and the secondary port comprising a DC load, the electrical power converter comprising:
a transformer or autotransformer connected to each one of a plurality of nodes of the electrical power converter;
at least one first power switch disposed between two nodes of the plurality of nodes, the at least one first power switch comprising two power terminals, at least a first control terminal, and a first capacitance in parallel; and
at least one second power switch disposed between two different nodes of the plurality of nodes, the at least one second power switch comprising two power terminals, at least a second control terminal, and a second capacitance in parallel;
the at least one first power switch being arranged on a primary side of the transformer or autotransformer and the at least one second power switch being arranged on a secondary side of the transformer or autotransformer, the at least one first power switch and the at least one second power switch being configured to connect the primary port to the secondary port through the transformer or autotransformer;
the at least first control terminal and the at least second control terminal being either different terminals or a single terminal;
the at least one first power switch and the at least one second power switch being configured to be operated simultaneously under an action of a logic control signal configured to provide a conducting status with the at least one first power switch and the at least one second power switch being simultaneously in an On state or in an Off state, the at least a first power switch and the at least one second power switch being configured to simultaneously connect or disconnect the transformer or autotransformer to the primary port and the secondary port and to form a Direct Electrical power converter, DPX;
in a given period of time, in which the at least one first power switch and the at least one second power switch are simultaneously activated, an On state time of the at least one first power switch and the at least one second power switch provides a direct power path from the DC energy source to the DC load through the transformer or autotransformer with a conduction duty cycle range in the at least one first power switch and the at least one second power switch higher than fifty percent, thereby reducing an RMS value of a current flowing through the at least one first power switch and the at least one second power switch for a given average converter output current; and
a conduction duty cycle of the at least one first power switch and the at least one second power switch is adjusted to maintain a peak voltage of the at least one first power switch and the at least one second power switch under a given constraint,
so that a transformer or autotransformer magnetization during the On state is reset during the Off state using a resonance between a magnetizing inductance of the transformer or autotransformer and the first capacitance in parallel with the at least one first power switch and the second capacitance in parallel with the at least one second power switch.
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