The motor manufacturer Kyowa Kogyo in Funabashi city of Chiba prefecture has recently developed two types of micro hydro generator to fit small streams and water pipes. Both types are of 1-10 kW output.
Taking advantage of its motor manufacturing technology, Kyowa Kogyo invented a new arrangement of magneto coils.
The motor can generate electricity only with 100-250 revolutions per minute. Water flow of 100-600 litres per second is enough. The company is planning to install a field test facility at a sewage treatment site.
http://sankei.jp.msn.com/region/news/130406/chb13040621400005-n1.htm
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