초록 ▼

A brushless motor with axial air gaps is rotated at speeds higher than that of conventional motors by using magnets adjustable in the radial direction. The axial gap machine includes one or more stators, containing windings that conduct electrical currents, and one or more rotors, with sets of perma

A brushless motor with axial air gaps is rotated at speeds higher than that of conventional motors by using magnets adjustable in the radial direction. The axial gap machine includes one or more stators, containing windings that conduct electrical currents, and one or more rotors, with sets of permanent magnets rotating on a shaft adjacent the stators. The magnets are supported by bearings in a magnet carrier on the rotor so that the magnets can move radially under the action of centrifugal force opposed by springs. The radial movement of the magnets reduces the number of lines of flux of the magnets that can interact with those created by the electrical currents flowing in the windings. Reducing the flux interaction allows an increase in the speed capability of the machine. Linear radial guides inside the magnet carrier restrict movement of the magnets in all directions other than the radial direction and stops limit outward and inward movement.

대표청구항 ▼

[What is claimed is:] [1.]a radially extending stator supporting a radially extending electric conducting coil;a shaft extending essentially perpendicular to said radially extending stator and said radially extending electric conducting coil;a radially extending rotor, fixed to said shaft and rotata

[What is claimed is:] [1.]a radially extending stator supporting a radially extending electric conducting coil;a shaft extending essentially perpendicular to said radially extending stator and said radially extending electric conducting coil;a radially extending rotor, fixed to said shaft and rotatable therewith, adjacent to said radially extending stator and said radially extending electric conducting coil supported by said stator;magnet support means on said radially extending rotor movable radially inwardly and radially outwardly adjacent to said radially extending electric conducting coil;magnets held by said magnet support means such that a magnetic flux of said magnets can interact with a magnetic flux of said electric conducting coils to vary back emf generated within said electric conducting coil as said magnet support means moves radially inwardly and radially outwardly;said magnets at a radial inward at rest position are located adjacent to said radially extending electric conducting coil such that said flux of said magnets essentially overlaps said flux of said radially extending electric conducting coil;said magnets moved radially outward from said radial inward at rest position, results in only a partial radial overlap of said flux of said magnets and said flux of said radially extending electric conducting coil.