Tham khảo tài liệu 'solar energy 2012 part 6', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Energy Control System of Solar Powered Wheelchair 143 sun light is available a flat and straight course is used and the wheelchair travels at a low speed the robotic wheelchair is able to move primarily powered by the photovoltaic cell. As a result the solar powered wheelchair is able to travel further distances. When the wheelchair travels at higher speeds and turns it requires greater power therefore it uses the energy from the fuel cell and the battery. 6. Conclusions A new robotic solar powered wheelchair using three energy sources a small photovoltaic cell a small fuel cell and a battery is proposed in this paper. All three energy sources use solar energy. The photovoltaic cell uses sun light directly. The battery is charged with electricity provided by the large photovoltaic cell installed on the setup roof. Hydrogen for the fuel cell is generated by a water electrolysis hydrogen generator which is also powered by the same large photovoltaic cell on the building roof. The energy control system selects the optimal energy source to use based on various driving conditions. It was confirmed from the experimental results that the robotic wheelchair is able to maneuver mainly using the photovoltaic cell when good moving conditions are available . abundant sun light a flat and straight course and low speed . The experimental results demonstrate that the robotic wheelchair is able to increase its moving distance. When moving conditions are not optimal the robotic solar wheelchair uses energy from the fuel cell and the battery. Improvements to the energy control system such as charging to the battery from the photovoltaic cell on the wheelchair roof power increase using a capacitor and hydrogen generation from waste biomass must be addressed in future research. 7. Acknowledgments The authors would like to express their deepest gratitude to the research staff of the High-Tech Research Center Project for Solar Energy Systems at the Kanagawa Institute of Technology .
