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US 5,293,093 AGranted
Limited large angle rotary dynamoelectric machine
AssigneeMPC Products Corporation
InventorStephen B. Warner
Life of this patent
Estimating the term…
Abstract
A limited large angle dynamoelectric machine generates a constant torque over an arc greater than 180 degrees without discontinuity and zero cogging. At any given location of the rotor, the flux path of the machine only crosses the stator coil at a single location. This results in the elimination of any type of commutation of the stator coil.
Claims23
A dynamoelectric machine comprising:
- a stator including a broken toroid defining a first air gap and an L-shaped extension attached to said stator at a point of said stator adjacent to said first air gap, said broken toroid defining a cylindrical area;
- a first wire coil wound helically about said broken toroid, said first wire coil defining first and second terminals;
- a rotor including a generally cylindrical portion and a magnetized portion, said magnetized portion located at least partially within said cylindrical area defined by said broken toroid;
- and
- said rotor and said L-shaped extension defining a second air gap.
2 more elements
A dynamoelectric machine comprising:
- a stator including a broken toroid defining a first air gap and an L-shaped extension attached to said stator at a point of said stator adjacent to said first air gap, said broken toroid defining a cylindrical area;
- a first wire coil helically wound about said broken toroid, said first wire coil defining first and second terminals;
- a rotor including a generally cylindrical portion and an extension, said extension located at least partially within said cylindrical area defined by said broken toroid;
- and
- said rotor and said L-shaped extension defining a second air gap.
2 more elements
A dynamoelectric machine comprising:
- a helically-shaped stator including a generally L-shaped extension, said stator defining a cylindrical area within said helically-shaped stator;
- a wire coil wound about said helically-shaped stator, said wire coil defining first and second terminals;
- a rotor including a generally cylindrical portion and a second extension, said second extension located at least partially within said cylindrical area;
- said rotor and said L-shaped extension defining a first air gap;
- and
- said second extension and said stator defining a second air gap.
3 more elements
A dynamoelectric machine comprising:
- a helically shaped stator defining an interior area;
- a first wire coil helically wound about said stator, said first wire coil defining first and second terminals;
- a rotor located at least partially within said interior area defined by said helically shaped stator;
- said rotor adapted to rotate about a rotational axis intersecting said interior area defined by said stator;
- and means for substantially reducing ripple of said machine over an arc range greater than 180 mechanical degrees, including
- means for establishing a magnetic flux path passing through said stator, said rotor and said first wire coil, wherein said magnetic flux path traverses a portion of said rotor along an axis generally parallel to said rotational axis.
3 more elements
Dependencies are inferred from the claim text.