抄録
As agricultural machines, many tractors using mainly diesel or turbo engines have been used. Such tractors are compact and highly efficient. However, they cause noise and air pollution. From the viewpoint of ecological environment and avoiding global warming, tractors not using such engines are required to be developed. So far we have conducted to produce electric vehicles including electric motor-cycle. In this report, we explain the technology of electric tillers for agricultural industries. The electric tiller we aim is compact, considering use for garden work. The weight is less than 25 kg, and the size is within 1,100 mm x 600 mm x 1,000 mm. The weight of 25 kg was selected because of being able to carry by hands. The motor used is the one for small-sized electric vehicle. In the project, design, manufacturing, stress analysis, producing electric circuit and control unit, and experiment have been conducted. The design using 3D-CAD and manufacturing was successfully conducted. In regard to control, feedback control remains to study in the future, although the control using potentiometer and H8 microprocessor worked. The other remained research item is to make the tiller to be lighter so that elderly people can use.
