Patent ID: 6864594

Claim:
A fluid power generator system including a generator coupled with a wing axial shaft which is rotated by operative fluid energy as a driving source and a load device including a battery connected to the generator, the fluid power generator system comprises: a comparing means for comparing an measured tip speed ratio, said measured tip speed ratio being calculated by a flow-rate signal based on a flow-rate of the operative fluid and a number of rotations based on the number of rotations of said wing axial shaft, and said reference tip speed ratio providing a maximum conversion efficiency of the operative fluid energy in said fluid power generator system; and a load control means for on/off controlling said load device so that if said measured tip speed ratio is smaller than said reference tip speed ratio as a result of comparison by said comparing means, said generator is placed in a no-load state, thereby restoring the number of rotations of said wing axial shaft to the number or rotations corresponding to said reference tip speed ratio said load control means being independent means for controlling a load which is applied to the generator; and a braking including a revolving number detecting unit for detecting the number of revolutions of said wing axial shaft and a brake unit for braking the rotation of the wing, said braking means operating the brake when the flow-rate of the operative fluid exceeds a designated maximum value or when a detected signal form the revolving number detecting unit is abnormal.