Details

Autor(en) / Beteiligte

• Singh, P.
• Rajagopalan, J.
• LaFollette, R.
• Fennie, C.
• Reisner, D.E.

Titel

Fuzzy logic-based solar charge controller for microbatteries

Ist Teil von

• Conference Record of the Twenty-Eighth IEEE Photovoltaic Specialists Conference - 2000 (Cat. No.00CH37036), 2000, p.1726-1729

Ort / Verlag

IEEE

Erscheinungsjahr

2000

Quelle

IEEE

Beschreibungen/Notizen

• A severe limitation on the functional capability of remote, autonomous, microelectromechanical (MEMS)-based sensors is the lack of a suitable micropower supply to power these devices. Such sensors often have low power requirements that may be provided by the combination of an energy scavenger (e.g., a solar cell) and a microbattery ("/spl mu/battery") made rechargeable using integrated circuit fabrication methods. While rechargeable /spl mu/batteries and solar cells have been previously demonstrated, the development of a microcharge/discharge controller has not. In this paper we present a novel, fuzzy logic-based solar charge controller that allows control of the charge/discharge of /spl mu/batteries. A breadboard implementation of the controller and its integration with a solar cell and /spl mu/attery is presented. The circuit topology of the /spl mu/battery controller is based on a buck converter design. During charging, the solar cell's operating point is adjusted by modulating the duty cycle of the buck converter's switching MOSFET using a fuzzy logic control algorithm to optimally charge the /spl mu/battery. Discharge data on the /spl mu/batteries and current-voltage characteristics of the solar cell are presented and the fuzzy logic model development for the charge control are also presented.