Induction machines without permanent magnets
AssigneeLinear Labs, Inc.
InventorsAndrei Popov, Michael Van Steenburg, Fred Hunstable
Life of this patent
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Abstract
Disclosed are various embodiments for an induction machine having a rotor comprising a plurality of rotor core assemblies configured to form a toroidal magnetic torque tunnel having at least a first inductive tunnel segment and a second inductive tunnel segment and a stator having a plurality of coils configured to form a coil winding assembly, the coil winding assembly positioned within the toroidal magnetic torque tunnel, such that at least one of the plurality of coils is surrounded by the first inductive tunnel segment or the second inductive tunnel segment, alternatively the rotor may be the coil winding assembly and the stator may be the toroidal magnetic torque tunnel.
Claims20
An induction machine comprising:
- a toroidal cylinder comprising;
- an inner rotor core coupled to an inner cage, the inner cage comprising a first set of conductive bars radially spaced about a central longitudinal axis of the induction machine to form an inner rotor core assembly, and the first set of conductive bars are coupled to a first inner shorting ring and a second inner shorting ring;
- a first axial rotor core coupled to a first set of axial spokes to form a first axial rotor core assembly, the first set of axial spokes comprising a second set of conductive bars coupled to, and radiating from, the first inner shorting ring;
- a second axial rotor core coupled to a second set of axial spokes to form a second axial rotor core assembly, the second set of axial spokes comprising a third set of conductive bars coupled to, and radiating from, the second inner shorting ring, and the rotor core assemblies forming a three sided magnetic torque tunnel comprising a first inductive tunnel segment and a second inductive tunnel segment;
- and
- a coil winding assembly arranged within the toroidal cylinder, the coil winding assembly comprising a set of coils, and the first inductive tunnel segment surrounding the set of coils.
A method of producing electric power with an induction machine comprising:
- positioning a toroidal cylinder about a central longitudinal axis of the induction machine, the toroidal cylinder defined by:
- an inner rotor core coupled to an inner cage, the inner cage comprising a first set of conductive bars radially spaced about the central longitudinal axis of the induction machine to form an inner rotor core assembly, the first set of conductive bars are coupled to a first inner shorting ring and a second inner shorting ring;
- a first axial rotor core coupled to a first set of axial spokes to form a first axial rotor core assembly, the first set of axial spokes comprising a second set of conductive bars coupled to, and radiating from, the first inner shorting ring;
- a second axial rotor core couple to a second set of axial spokes to form a second axial rotor core assembly, the second set of axial spokes comprising a third set of conductive bars coupled to, and radiating from, the second inner shorting ring, the rotor core assemblies forming a three sided magnetic torque tunnel comprising a first inductive tunnel segment and a second inductive tunnel segment, and the rotor core assemblies configured to rotate about the central longitudinal axis;
- positioning a coil winding assembly within the toroidal cylinder about the central longitudinal axis within a rotational path of the rotor core assemblies, the coil winding assembly comprising a set of coils, the first inductive tunnel segment surrounding of the plurality of coils;
- and
- applying current to the setof coils in a sequence that continuously impacts torque to turn the rotor core assemblies in a target direction, relative to the coil winding assembly.
Dependencies are inferred from the claim text.