Smart boost converter for battery charging from discontinuous voltage power source in underwater environment

A novel control technique for switching converters in battery recharging applications is presented. The proposed technique makes the converter act as an impedance matcher, thus achieving maximum power transfer from source to load. In particular, the application of this technique to a boost converter is analyzed. This novel control technique proves to be useful for energy scavenging purposes in marine environment, especially for battery recharging from discontinuous power sources, such as waves and marine currents. AUV´s, underwater sensors and data loggers can be fitted with this device and a small water turbine, in order to extend their lifetime.