By Bruno De Wachter / Published on Thu, 2008-04-03 12:11
A clever tool to provide electricity for anybody anywhere
Engineers tend to see things big. So much so that they sometimes forget that the biggest impact can often be achieved by seeing things small and simple. This tendency to opt for the big certainly doesn’t hold for Colin Bulthaup, founder of Potenco. The mission of his company is huge: making clean power universally available and immediately useful anywhere and everywhere in the world. His solution is surprisingly small: a pull-cord generator the size of a yoyo that can safely power rechargeable batteries and provide energy for applications such as lighting, cell phones, or water purifiers.
Read full story
By Isabelle Heriakian / Published on Tue, 2007-07-10 00:00
A multipolar contactless doubly-fed asynchronous generator is considered where the primary and secondary generation windings are arranged on the teeth of the stator, while the rotor is tooth-like and without windings. Analytical treatment of such a generator has been performed and the basic equations that allow the parameters and performance of the machine to be calculated in generation mode of operation have been obtained. The results of experimental investigations are presented for the physical model of the generator and comparison with the calculation data is given.
Read full story
