| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a low power consumption converter circuit that is connected to an electric energy source in which the electric power transmitted therefrom fluctuates greatly. <P>SOLUTION: A converter circuit (2) is provided with a chopper circuit (11) that is connectable to an electric energy source (3) and has a variable duty cycle, control loop formation means (57) that tracks the maximum power point of the electric energy source, and a control unit (53) that is configured to issue an instruction for varying the duty cycle of the chopper circuit at a predetermined time interval in response to a set point signal from the control loop formation means. The control loop formation means is provided with storage means (60) that stores information corresponding to output voltage from the electric energy source to at least three consecutive duty cycles in an analog format, and an analog comparison unit (62) that transmits a set point signal used for increasing/decreasing of a duty cycle by the control unit in response to the information stored in an analog format. <P>COPYRIGHT: (C)2012,JPO&INPIT |
