Fan with magnetic blades
AssigneeAir Concepts, Inc.
InventorEdward Lopatinsky
Life of this patent
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Abstract
A DC driven fan with blades made of magnetized material and permanently magnetized in the radial direction and cooperating with a plurality of electromagnetic stator coils mounted external to the outer fan edges. Adjacent blades have alternate N-S, S-N radial magnetic orientations. In one embodiment, the blades are mounted in a non-ferrous hub and in an alternate embodiment they are mounted in a ferrous hub so that adjacent blades function like a U or V-shaped magnet. Blades can be made of magnetized ferrous, ferromagnetic, or magnetized plastic depending upon the application and blade strength specifications.
Claims11
An apparatus having a fan assembly comprising
- a frame,
- a pulsed direct current electromagnet field assembly mounted to said frame,
- a fan blade assembly mounted relative to said frame for rotation about an axis and having at least two blades substantially permanently magnetized in the radial direction,
- wherein torque is applied to rotate said blade assembly when the magnetic field of said blades interacts with the electromagnetic field of said electromagnetic field assembly,
- said fan assembly comprises at least four blades, each blade having a N-S or S-N radial magnetic field orientation that is opposite to its adjacent blade, and
- wherein said fan assembly comprises first and second fan subassemblies in which all blades of said first subassembly are magnetized with the same radial N-S orientation and all blades of said second subassembly are magnetized with the same S-N orientation and the first and second subassemblies are coupled together.
Dependencies are inferred from the claim text.