Abstract: [Object of the Invention] An object of the present invention is to provide a water turbine power generator comprising a power generation mechanism provided with a water turbine unit and a power generator unit, and a locking mechanism for engaging the power generation mechanism with a support member, which is free from various drawbacks such as increase in size of the locking mechanism, difficulty of detaching the locking mechanism from a damming board forming the support member when the water turbine power generator is serviced, and so forth.

Abstract: A submersible power generator with an inner/outer double rotational armatures-type power generation mechanism provided with an outer rotational armature and an inner rotational armature opposing the outer rotational armature and rotatable in a direction opposite of the outer rotational armature, and a pair of propellers disposed coaxially with blades of each of the pairs of propellers twists in opposite directions relative to an extending direction of a central axis of the pair of propellers, and a casing for accommodating and shielding the inner/outer double rotational armatures-type power generation mechanism. The submersible power generator, as installed under water to operate in a current, has a buoyancy F acting thereon that is larger than gravity W acting thereon during operation of the submersible power generator due to gravity acting on the mooring wire, so that F>W+gravity acting on the mooring wire?buoyancy acting on the mooring wire.

Abstract: A submersible power generator with an inner/outer double rotational armatures-type power generation mechanism provided with an outer rotational armature and an opposing inner rotational armature to rotate opposite to the outer rotational armature, and a pair of propellers, where one of the propellers is connected to one of the inner and outer rotational armatures and the other of the propellers is connected to the other armatures, and a casing for accommodating the inner/outer double rotational armatures-type power generation mechanism and shielding it from an external environment. The submersible power generator is installed under water to operate in a water current with a gravity W that is larger than buoyancy F acting thereon during operation of the submersible power generator, and makes a rotational moment center that a sum total of rotational moments generated by gravity W, buoyancy F, and drag D in a water current becomes zero.

Abstract: [Object of the Invention] An object of the present invention is to provide a submersible power generator which can be stably moored in water and can generate high electromotive voltage and achieve high power generation efficiency without being increased in size.

Abstract: [Object of the Invention] An object of the present invention is to provide a water turbine power generator comprising a power generation mechanism provided with a water turbine unit and a power generator unit, and a locking mechanism for engaging the power generation mechanism with a support member, which is free from various drawbacks such as increase in size of the locking mechanism, difficulty of detaching the locking mechanism from a damming board forming the support member when the water turbine power generator is serviced, and so forth.

Abstract: [Object of the Invention] An object of the present invention is to provide a submersible power generator which can be stably moored in water and can generate high electromotive voltage without being increased in size.

Abstract: In the wind turbine generator, a front wind rotor includes a blade designed, in an area outer than an intermediate of a rotation radius of the front wind rotor, to have a blade element comprised of an aerofoil being cambered in a cross-section along a rotational direction thereof, and is radially twisted so as to ensure an angle of attack smaller by a predetermined stable margin angle than an angle of attack providing a maximum lift-drag ratio regardless of a radial position, and further designed, in an area inner than the intermediate of a rotation radius of the front wind rotor, to be radially twisted so as to ensure an angle of attack at which a drag acting on the blade element is made small, and a total force of the drag and a lift force is axially directed, regardless of a radial position.

Abstract: In the wind turbine generator, a front wind rotor includes a blade designed, in an area outer than an intermediate of a rotation radius of the front wind rotor, to have a blade element comprised of an aerofoil being cambered in a cross-section along a rotational direction thereof, and is radially twisted so as to ensure an angle of attack smaller by a predetermined stable margin angle than an angle of attack providing a maximum lift-drag ratio regardless of a radial position, and further designed, in an area inner than the intermediate of a rotation radius of the front wind rotor, to be radially twisted so as to ensure an angle of attack at which a drag acting on the blade element is made small, and a total force of the drag and a lift force is axially directed, regardless of a radial position.