Doświadczenia z budowy i eksploatacji małych przydomowych elektrowni wiatrowych

The sense of construction of small windmills is shown. Still increasing interest in cheap sources of energy, observed in Poland, has prompted staff of Research And Development Centre Of Electric Machines Komel to build, put in motion and test on own terrain the small and cheap windmill. This project has brought a lot of useful information concerning both the process of building of smali windmills and the performance of such "power station". The assumption was made that the windmill should be really cheap and easy to build. In given example the modernization of the 12 blade propeller windmill with belt gear is shown. After this modernization, the windmill is a three blade windmill without any gear. Such a windmill is better matched to the wind conditions observed in south Poland. In the construction of described windmill the Iow speed permanent magnet synchronous generator of our design is used. The energy produced by the windmill is used as a additional heat sources in buildings, so there is no need for regulation of the output voltage from generator (regarding both, rms value and the frequency). Thanks to that, the windmill is relatively cheap.