US 7,582,998 B2Granted

Brushless DC electrical generator

OwnerStephen Hummelinventor

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Abstract

The present invention is a direct current generating machine that eliminates the need for brushes or other mechanical commutators. A pair of opposed, spaced apart rotatable rotors, each carrying a plurality of bar magnets, are synchronously rotated about a common axis of rotation. A stationary electrically conducting wire extends through the axis of rotation, and radially outwardly therefrom, between the rotating magnetic field. In another embodiment the bar magnets are replaced by pieces of steel which interrupt a unidirectional, magnetic field created by a magnet. The magnet used to create the unidirectional, magnetic field may be an electromagnet. The resultant electrical signal generated in the conductor is unidirectional. The present invention may be used to create brushless DC electrical signals, brushless three-phase DC electrical signals, or a plurality of DC and/or inverted DC signals.

Claims20

Dependent claims

An apparatus for the generation of a unidirectional electrical signal, comprising:

first and second, opposed, spaced apart, generally parallel, rotor discs oriented generally perpendicular to a center axis of the rotor discs, and mutually defining a gap therebetween, the first rotor disc carrying a first plurality of equiangularly, circumferentially spaced apart bar magnets, and the second rotor disc carrying a second plurality of equiangularly, circumferentially spaced apart bar magnets, respective ones of the second plurality of bar magnets being magnetically aligned with respective ones of the first plurality of bar magnets to provide a generally uniform magnetic field extending across the gap from the first rotor disc to the second rotor disc and circumferentially distributed about the center axis;
means for rotating the magnetic field about the center axis;
and
stationary electrical conducting means extending through the center axis of one of the first or second rotor discs and exiting through the circumferentially distributed magnetic field and between the first and second rotor discs, whereby the magnetic field cuts across the electrical conducting means in a uniform direction when the magnetic field is rotated about the center axis, thereby inducing a unidirectional electric signal in the conducting means.

1 more element

Dependencies are inferred from the claim text.