Energy transfer on rotating shafts using pm-printed winding machine

The application of an energy transmission system to a rotating shaft by using a counter-weighted-free-wheeled-rotor permanent magnet synchronous machine is analyzed in this paper. This solution avoids slip rings and can generate a power amount which can be significantly higher if compared to other contact-less solutions. The guidelines for the design of such a machine are discussed by considering the maximization of the power transmission. To this purpose, an analytical model of the conversion system including generator, diode bridge rectifier and dc-dc converter is formulated. The results of a case study concerning the application of the system to a rotating shaft are presented and discussed.