Patent ID: 7531932
Filing Date: 2009-05-12
Classification: H02K

Abstract:
1. A high-speed rotation power generating system comprising: a turbine driven by a fluid; a power generator including a permanent magnet rotor having a permanent magnet and rotated together with the turbine and a plurality of stator coils each of which is comprised of a coreless coil, the rotor being rotated such that voltage is induced on the stator coils, in which power is generated by the power generator; and a back yoke disposed at one of two opposed sides of the stator coils which is opposed to the other side thereof further confronting the permanent magnet of the rotor, the back yoke being rotated at high-speed of at least 70,000 rpm together with the rotor and comprised of ferrite having a specific resistance which is no less than 1 Ωm.