Construção de um gerador de estator permanente e baixa rotação, Quelimane - Zambézia

Abstract

Mozambique is a country that presents difficulties in the distribution of electricity, leaving several communities to rely on biomass energy to carry out their daily activities. The present work aims at the construction of a permanent low-speed stator generator capable of producing electrical energy at relatively low wind speeds, determining its power and evaluating its efficiency under wind conditions where it would be subject. For the possible tests of the generator for the determination of the power and its performance, it was coupled to a wind turbine of the vertical axis installed in the university campus of the School Marine and Coastal Sciences. For the control of the system, a hand anemometer and an analog multimeter were employed for wind force and voltage and current intensity measurements respectively. Wind data as well as current data were statically processed by MS EXCEL spreadsheet; power was determine. For the performance evaluation, graphs were constructed that relate the power produced with the wind force and the performance of the generator as a function of the wind force. The results show that the maximum tension was observed at a speed of 4 m/s-1. The maximum efficiency of the generator, given the local wind strength was 7.2%, which is acceptable considering to the wind acting on the premises. The results obtained during the experiment are encouraging given to the wind conditions in which the generator was submitted.