Patent ID: 11967902
Assignee: EGGTRONIC ENGINEERING S.P.A.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A converter for transferring electric power to an electrical load, comprising:
a first input terminal and a second input terminal, between which a direct electric voltage or an electric voltage similar to a direct electric voltage is applied,
a first output terminal and a second output terminal connectable to opposite ends of the electrical load,
a first electric branch adapted to connect the first input terminal with a first intermediate electrical node,
a second electric branch adapted to connect the first intermediate electrical node with the second input terminal,
a third electric branch adapted to connect the first output terminal with a second intermediate electrical node,
a fourth electric branch adapted to connect the second intermediate electrical node with the second output terminal,
a first active switch placed on the second electric branch and having a first conduction terminal connected to the first intermediate electrical node, a second conduction terminal connected with the second input terminal, and a control terminal adapted to receive an electric driving signal to switch the first active switch between a saturation condition, wherein the first active switch allows a passage of electric current between the first and the second conduction terminals, and a cut-off condition, wherein the first active switch prevents said passage of electric current, and
a resonant circuit sized to reduce an electric voltage and/or an electric current applied to said first active switch at least in the moments wherein said first active switch switches from the cut-off condition to the saturation condition,, wherein said resonant circuit comprises at least:
a first resonance inductor placed on the first electric branch and having a first terminal connected to the first input terminal and a second terminal connected to the first intermediate electrical node,
a second resonance inductor placed on the third electric branch and having a first terminal connected to the second intermediate electrical node and a second terminal connected to the first output terminal, and
a first resonance capacitance comprising a first terminal connected to the first intermediate electrical node and a second terminal connected to the second intermediate electrical node,
wherein the first resonance inductor and the second resonance inductor are inductively coupled together with a reciprocal coupling factor less than 1, and in that the fourth electric branch comprises a diode or a second active switch,
wherein the diode has a cathode that is connected with the second intermediate electrical node and an anode that is connected with the second output terminal,
wherein the second active switch has a first conduction terminal connected to the second intermediate electrical node, a second conduction terminal connected to the second output terminal, and a control terminal adapted to receive an electric driving signal to switch the second active switch between a saturation condition, wherein the second active switch allows the passage of electric current between the first and the second conduction terminals, and a cut-off condition, wherein the second active switch prevents said passage of electric current.