Patent ID: 7880319
Filing Date: 2011-02-01
Classification: F03B,F03D,F05B,Y02E

Abstract:
1. A power generating device utilizing hydrodynamic force, comprising: a vane rotated by hydrodynamic force from a fluid; a generator motor mechanically linked to the vane and operative as a generator and a motor; at least one of a flow velocity measuring unit configured to measure flow velocity of the fluid, and a rotation speed measuring unit configured to measure the rotation speed of the generating device; a control unit configured to control the generator motor based on at least one of flow velocity measured by the flow velocity measuring unit and rotation speed measured by the rotation speed measuring unit, and a transmission disposed between the vane and the generator motor to mechanically link the vane and the generator motor for making the rotation speed of the generator motor faster than the rotation speed of the vane. wherein if at least one of the flow velocity and the rotation speed lies within a prescribed low range at startup of the generator motor, the control unit operates the generator motor as a motor to increase the rotation speed of the vane, and then operates the generator motor as a generator, and wherein, at startup of the generator motor,