Patent ID: 8659283

Claim:
An apparatus comprising a converter circuit to be connected to an electrical energy source capable of showing major fluctuations in delivered power, said circuit comprising: a chopper circuit with a variable duty cycle, said chopper circuit being connectable to said electrical energy source; at least one output circuit adapted for being connected to said chopper circuit; a control loop for tracking a maximum power point of said electrical energy source connected to an output of said energy source; and a control unit configured to command, at predefined intervals, changes in said duty cycle of said chopper circuit as a function of a set-value signal of said control loop; wherein said control loop includes means for analog storage of pieces of information corresponding to output voltages from said electrical energy source for at least three successive duty cycles; and an analog comparison unit delivering an output, as a function of said stored pieces of information, and a set-value signal for increasing or reducing of said duty cycle by said control unit.