Abstract
In this study, the authors use an electric motorcycle with photovoltaic modules as an example of solar vehicles. It is a problem that solar irradiance is changing frequently and unequally while the motorcycle is running. We designed and made three different prototypes of photovoltaic power controller (MPPT ; maximum power point tracker). They use conventional algorithm of hill-climbing control method, and named 'mono-system', 'multi-system' and 'enhanced mono-system'. To evaluate these power controllers against changing irradiance, driving experiments under the shadow of trees have done on oval track; we discussed each efficiency of photovoltaic system.
