Commissariat a L'energie Atomique Et Aux Energies Alternatives

Guy Waltisperger

Jérôme Willemin

Frederic Rothan

Adrien Ramond

A converter circuit to be connected to an electrical energy source includes a chopper circuit having an input terminal capable of being connected to said electrical energy source, a first output circuit adapted to being connected via a first switch to an output terminal of the chopper circuit, a second output circuit adapted to being connected via a second switch to the output terminal of the chopper circuit, and a control circuit. The control circuit is adapted for controlling the duty cycle of the chopper circuit as a function of the variation in voltage of said electrical energy source, and switching between the first and second switches as a function of a range of output voltage settings for the first output circuit.

Converter circuit and electronic system comprising such a circuit

A converter circuit to be connected to an electrical energy source capable of showing major fluctuations in delivered power includes a chopper circuit with a variable duty cycle and connectable to the electrical energy source, an output circuit adapted for connection to the chopper circuit, a control loop for tracking an MPP of the energy source connected to an output of the energy source, and a control unit configured to command, at predefined intervals, changes in the chopper circuit's duty cycle as a function of the control loop's set-value signal. The control loop includes means for analog storage of pieces of information corresponding to output voltages from the energy source for at least three successive duty cycles, and an analog comparison unit delivering an output, as a function of the stored pieces of information, and a set-value signal for increasing or reducing of the duty cycle by the control unit.

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Grenoble, France

Guy Waltisperger