Abstract

A fluid turbine has semi-spherical, hollow blades arrayed about a vertical axis. The turbine's blade shape reduces drag on a convex side and increases drag on a concave side. Part of the center of the array of rotor blades is open, allowing flow through the center of the array. The spherical form enhances fluid flow through the center of the array and results in rotational force on a downwind blade, and directs fresh air into bypass flow. A combination of holes and a deflector surface generates vortices as updraft flow passes through holes, creating a pressure differential between the area surrounding the holes and the upper portions of the blade. Fluid passing from relatively higher pressure to relatively lower pressure passes the deflector surface, forming vortices that result in rotational force on the blades of the fluid turbine.

IPC Classes  ?

• F03D 3/06 - Rotors
• F03D 3/00 - Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor

Abstract

An axial-flux generator for fluid turbines has a continuously variable generator that is constructed of a pair of rotors that move radially across a stator resulting in varying torque and varying power output. In one embodiment the rotors are normally held proximal to the center of a stator by spring tension. The stator is larger than the normally held position of the rotors. As the angular velocity of the rotors increases, the rotors move radially toward the perimeter of the stator, thus encountering a greater stator surface area providing increased torque, increased power generation and a higher-rated output speed when used with a fluid turbine.

IPC Classes  ?

• H02K 16/02 - Machines with one stator and two rotors
• F16C 32/04 - Bearings not otherwise provided for using magnetic or electric supporting means
• F03D 3/00 - Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor
• F03D 3/06 - Rotors
• H02K 1/2793 - Rotors axially facing stators
• H02K 7/00 - Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
• H02K 21/02 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets Details

Abstract

A passive magnetic bearing employs eddy currents in a copper core between neodymium annular magnets to support the copper core and an associated rotating shaft. The copper core has an annular flange that is coaxial with a hollow cylinder. The hollow cylinder supports a rotating shaft. An annular iron core is coaxial with and surrounds the annular flange. Annular neodymium magnets surround the upper and lower portions of the hollow cylinder. In some embodiments a touch-down bearing is made up of an upper and a lower bearing race that are spaced away from the upper surface and lower surface of the annular flange. The core rotates over the bearing race(s) until sufficient magnetic flux is generated to support the copper core and hence the shaft. Once spinning, a magnetic field is generated in the copper core.

IPC Classes  ?

• F16C 32/04 - Bearings not otherwise provided for using magnetic or electric supporting means
• F03D 3/00 - Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor
• F03D 3/06 - Rotors
• H02K 1/2793 - Rotors axially facing stators
• H02K 7/00 - Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
• H02K 16/02 - Machines with one stator and two rotors
• H02K 21/02 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets Details