TRANSVERSE AND/OR COMMUTATED FLUX SYSTEMS CONFIGURED TO PROVIDE REDUCED FLUX LEAKAGE, HYSTERESIS LOSS REDUCTION, AND PHASE MATCHING
First Claim
Patent Images
1. An electrical machine, comprising:
- a rotor, a stator, and a coil, wherein the rotor rotates about a rotational axis and interacts with the stator at a switch interface,wherein the rotor and coil function in combination to cause flux to flow around the coil in first and second opposite directions,wherein the electrical machine comprises a plurality of flux concentrators that are interleaved adjacent and between a plurality of magnets,wherein the plurality of magnets are extended in a direction away from the coil to a distance greater than an adjacent flux concentrator of the plurality of flux concentrators,wherein at least a portion of the rotor overhangs the stator on at least one of a distinct first side of the stator, a distinct second side of the stator, or both the distinct first side of the stator and the distinct second side of the stator,wherein, in a first position of the rotor, flux is transferred from a switching surface of the rotor to at least one of a first plurality of stator teeth along substantially the entire length of a switching surface of the rotor,wherein, in a second position of the rotor, flux is transferred from the switching surface of the rotor to at least one of a second plurality of stator teeth along substantially the entire length of the switching surface of the rotor,wherein the flux flow in the flux concentrator corresponding to the switching surface of the rotor is substantially in the same direction in the first position of the rotor as in the second position, andwherein the electrical machine is at least one of a transverse flux machine or a commutated flux machine.
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Abstract
Electrical machines, for example transverse flux machines and/or commutated flux machines, may be configured to achieve increased efficiency, increased output torque, and/or reduced operating losses via use of extended magnets, overhung rotors, and/or stator tooth overlap. Extended magnets may reduce flux leakage between adjacent flux concentrators. Overhung rotors may reduce flux leakage, and may also facilitate voltage balancing in polyphase devices. Stator tooth overlap may reduce hysteresis losses, for example losses in flux concentrating portions of an electrical machine.
117 Citations
26 Claims
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1. An electrical machine, comprising:
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a rotor, a stator, and a coil, wherein the rotor rotates about a rotational axis and interacts with the stator at a switch interface, wherein the rotor and coil function in combination to cause flux to flow around the coil in first and second opposite directions, wherein the electrical machine comprises a plurality of flux concentrators that are interleaved adjacent and between a plurality of magnets, wherein the plurality of magnets are extended in a direction away from the coil to a distance greater than an adjacent flux concentrator of the plurality of flux concentrators, wherein at least a portion of the rotor overhangs the stator on at least one of a distinct first side of the stator, a distinct second side of the stator, or both the distinct first side of the stator and the distinct second side of the stator, wherein, in a first position of the rotor, flux is transferred from a switching surface of the rotor to at least one of a first plurality of stator teeth along substantially the entire length of a switching surface of the rotor, wherein, in a second position of the rotor, flux is transferred from the switching surface of the rotor to at least one of a second plurality of stator teeth along substantially the entire length of the switching surface of the rotor, wherein the flux flow in the flux concentrator corresponding to the switching surface of the rotor is substantially in the same direction in the first position of the rotor as in the second position, and wherein the electrical machine is at least one of a transverse flux machine or a commutated flux machine. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An electrical machine, comprising:
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a coil; and a plurality of magnets interleaved with a plurality of flux concentrators, wherein the plurality of flux concentrators are configured to transfer flux at a switch interface, wherein at least one of the plurality of magnets is extended in a direction away from the coil to a distance greater than an adjacent flux concentrator of the plurality of flux concentrators in order to reduce flux leakage from the adjacent flux concentrator, and wherein the electrical machine is at least one of a transverse flux machine or a commutated flux machine. - View Dependent Claims (9, 10, 11, 12)
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13. An electrical machine, comprising:
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a coil; a stator comprising a plurality of flux switches; and a rotor comprising a plurality of magnets interleaved with a plurality of flux concentrators, wherein the rotor overhangs the stator on a first side of the stator and a second side of the stator in a direction parallel to an air gap between the rotor and the stator, and wherein the electrical machine is at least one of a transverse flux machine or a commutated flux machine. - View Dependent Claims (14, 15, 16, 17, 24, 25, 26)
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18-23. -23. (canceled)
Specification