Electric vehicle battery charger comprising a PFC circuit
The battery charger (C) for electric vehicles comprises a voltage converter (DC/DC CONV), a power factor correction circuit (PFC) connected upstream of the voltage converter (DC/DC CONV), a controller circuit (PFC CNTR) operatively connected to the correction circuit (PFC) and suitable for piloting the correction circuit (PFC) for the correction of the power factor in the battery charger (C), a retroaction line (L) connected to the output of the voltage converter (DC/DC CONV) and to an input of the controller circuit (PFC CNTR), wherein the controller circuit (PFC CNTR) is suitable for varying the output voltage (V PFC ) of the correction circuit (PFC) within a predefined voltage interval and according to the output voltage (V DCOUT ) of the voltage converter (DC/DC CONV), in order to let the voltage converter (DC/DC CONV) operate as much as possible around the point of maximum efficiency.
1. A battery charger (C) for electric vehicles, comprising:
at least a voltage converter, DC/DC CONV;
at least a power factor correction circuit, PFC, connected upstream of said, DC/DC CONV;
at least a controller circuit, PFC CNTR, operatively connected to said PFC and suitable for piloting said PFC for the correction of the power factor in said battery charger (C); and
at least a retroaction line (L) connected to the output of said DC/DC CONV and to at least an input of said PFC CNTR;
wherein said PFC CNTR comprises at least a first input connected to the output of said DC/DC CONV through said retroaction line (L) and at least a second input connected to the input of said PFC;
wherein said PFC CNTR is configured to vary an output voltage (VPFC) of said PFC within a predefined voltage interval and according to an output voltage, VDCOUT, of said DC/DC CONV and compatibly with a main input voltage in order to let said DC/DC CONV operate as much as possible around the point of maximum efficiency;
wherein said retroaction line (L) comprises at least a first adder (SUM 1 ) having a first input connected to the output of said PFC, a second input connected to the output of said DC/DC CONV and an output connected to said first input of the controller circuit (PFC CNTR).
2. A battery charger (C) for electric vehicles, comprising:
at least a voltage converter, DC/DC CONV;
at least a power factor correction circuit, PFC, connected upstream of said, DC/DC CONV;
at least a controller circuit, PFC CNTR, operatively connected to said PFC and suitable for piloting said PFC for the correction of the power factor in said battery charger (C); and
at least a retroaction line (L) connected to the output of said DC/DC CONV and to at least an input of said PFC CNTR;
wherein said PFC CNTR comprises at least a first input connected to the output of said DC/DC CONV through said retroaction line (L) and at least a second input connected to the input of said PFC;
wherein said PFC CNTR is configured to vary an output voltage (VPFC) of said PFC within a predefined voltage interval and according to an output voltage, VDCOUT, of said DC/DC CONV and compatibly with a main input voltage in order to let said DC/DC CONV operate as much as possible around the point of maximum efficiency;
wherein said retroaction line (L) comprises at least a second adder (SUM 2 ) having a first input connected to the input of said PFC, a second input connected to the output of said DC/DC CONV and an output connected to said second input of the controller circuit (PFC CNTR).
3. The battery charger according to claim 1 , wherein said voltage converter (DC/DC CONV) comprises at least a DC-DC converter.
4. A battery charger (C) for electric vehicles, comprising:
at least a voltage converter, DC/DC CONV;
at least a power factor correction circuit, PFC, connected upstream of said, DC/DC CONV;
at least a controller circuit, PFC CNTR, operatively connected to said PFC and suitable for piloting said PFC for the correction of the power factor in said battery charger (C);
at least a retroaction line (L) connected to the output of said DC/DC CONV and to at least an input of said PFC CNTR; and
at least a second DC/DC CONTR operatively connected to said DC/DC CONV;
wherein said PFC CNTR comprises at least a first input connected to the output of said DC/DC CONV through said retroaction line (L) and at least a second input connected to the input of said PFC;
wherein said PFC CNTR is configured to vary an output voltage (VPFC) of said PFC within a predefined voltage interval and according to an output voltage, VDCOUT, of said DC/DC CONV and compatibly with a main input voltage in order to let said DC/DC CONV operate as much as possible around the point of maximum efficiency;
wherein said second DC/DC CONTR comprises a first input connected to said DC/DC CONV, a first output connected to a first adder (SUM 1 ) having a first input connected to the output of said PFC and a second output connected to a second adder (SUM 2 ) having a first input connected to the input of said PFC.