Hybrid alternator
First Claim
Patent Images
1. A hybrid alternator comprising:
- a stator; and
a rotor mounted for rotation within the stator and separated therefrom by an air gap, said rotor having a rotor core defining a plurality of magnetic poles, adjacent ones of the magnetic poles having alternating north and south magnetic fields, the plurality of magnetic poles being consecutively arranged in a direction that is circumferential of the rotor core at least one of the magnetic poles being a permanent magnetic pole including a permanent magnet, the remaining magnetic poles comprising a plurality of electromagnetic poles, each electromagnetic pole including a winding, the permanent magnet of the permanent magnetic pole being physically remote from each of the windings of the electromagnetic poles.
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Abstract
A hybrid alternator comprising a stator, and a rotor mounted for rotation within the stator and separated therefrom by an air gap, said rotor having a rotor core defining a plurality of magnetic poles, adjacent ones of the magnetic poles having alternating north and south magnetic fields, the plurality of magnetic poles comprising at least one permanent magnetic pole defined by a permanent magnet, and a plurality of electromagnetic poles, each of which is defined by a wound field.
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Citations
31 Claims
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1. A hybrid alternator comprising:
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a stator; and a rotor mounted for rotation within the stator and separated therefrom by an air gap, said rotor having a rotor core defining a plurality of magnetic poles, adjacent ones of the magnetic poles having alternating north and south magnetic fields, the plurality of magnetic poles being consecutively arranged in a direction that is circumferential of the rotor core at least one of the magnetic poles being a permanent magnetic pole including a permanent magnet, the remaining magnetic poles comprising a plurality of electromagnetic poles, each electromagnetic pole including a winding, the permanent magnet of the permanent magnetic pole being physically remote from each of the windings of the electromagnetic poles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A hybrid alternator comprising:
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a stator having a stator winding; a rotor mounted for rotation within the stator and separated therefrom by an air gap, the rotor including; a rotor core defining a plurality of rotor field poles, at least one permanent magnet, the magnet being attached to a corresponding rotor field pole to define a permanent magnetic pole, the magnet being attached in a manner such that it forms a portion of the rotor perimeter, and a rotor winding wound only around the remaining rotor field poles to define a plurality of electromagnetic poles, the permanent magnetic pole being physically remote from the rotor winding on the remaining rotor field poles, the electromagnetic and permanent magnetic poles being consecutively arranged in a direction that is circumferential of the rotor core, adjacent ones of the magnetic poles having alternating north and south magnetic fields.
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26. A hybrid alternator comprising:
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a stator having a stator winding; a rotor mounted for rotation within the stator and separated therefrom by an air gap, the rotor including; a rotor core defining a plurality of rotor field poles, at least one permanent magnet, the magnet being positioned within the rotor perimeter and associated with a pair of adjacent rotor field poles to form adjacent permanent magnetic poles, and a rotor winding wound only around the remaining rotor field poles to define a plurality of electromagnetic poles, the permanent magnetic being physically remote from the rotor winding on the remaining rotor field poles, the electromagnetic and permanent magnetic poles being consecutively arranged in a direction that is circumferential of the rotor core, adjacent ones of the magnetic poles having alternating north and south magnetic fields.
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27. A hybrid alternator comprising:
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a stator having a stator winding; a rotor mounted for rotation within the stator and separated therefrom by an air gap, the rotor including; a rotor core defining a plurality of rotor field poles, each of which having a pole shoe, at least one permanent magnet, the magnet being mounted between the rotor core and said pole shoe to form a permanent magnetic pole, and a rotor winding wound only around the remaining rotor field poles to define a plurality of electromagnetic poles, the permanent magnetic being physically remote from the rotor winding on the remaining rotor field poles, the electromagnetic and permanent magnetic poles being consecutively arranged in a direction that is circumferential of the rotor core, adjacent ones of the magnetic poles having alternating north and south magnetic fields.
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28. A hybrid alternator comprising:
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a rotor core mounted for rotation within the stator and separated therefrom by a radial air gap, the rotor including; a shaft mounted for rotation within the stator, a wound field rotor portion mounted on the shaft for rotation within a first longitudinal region of the stator, the wound field rotor portion having a rotor winding and multiple electromagnet poles, each of said electromagnetic poles includes a rotor field pole having a longitudinal axis substantially parallel to said shaft, said rotor field pole includes; a body portion radially extending from said rotor core to an end surface and having a first longitudinal length, and an end portion attached to said end surface and having a second longitudinal length that is greater than said first longitudinal length and a permanent magnet rotor portion mounted on the shaft in longitudinally spaced relation to the wound field rotor portion for rotation within a second longitudinal region of the stator, the permanent magnet rotor portion having multiple permanent magnetic poles.
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29. A hybrid alternator comprising:
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a stator; and a rotor mounted for rotation within the stator and separated therefrom by an air gap, said rotor having a rotor core having a plurality of rotor field poles that define a rotor perimeter, each rotor field pole defining a corresponding magnetic pole, adjacent ones of the magnetic poles having alternating north and south magnetic fields, the magnetic poles being consecutively arranged in a direction that is circumferential of the rotor core, at least one of the magnetic poles being a permanent magnetic pole comprising a permanent magnet positioned on the rotor and within the rotor perimeter, the remaining magnetic poles comprising a plurality of electromagnetic poles, each electromagnetic pole including a winding, the permanent magnet of the permanent magnetic pole being physically remote from each of the windings of the electromagnetic poles.
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30. A hybrid alternator comprising:
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a stator; and a rotor mounted for rotation within the stator and separated therefrom by an air gap, said rotor having a rotor core having a plurality of rotor field poles that define a rotor perimeter, each rotor field pole defining a corresponding magnetic pole, adjacent ones of the magnetic poles having alternating north and south magnetic fields, the magnetic poles being consecutively arranged in a direction that is circumferential of the rotor core, at least one of the magnetic poles being a permanent magnetic pole comprising a permanent magnet that is attached to one of the rotor field poles and forms a portion of the rotor perimeter, the remaining magnetic poles comprising a plurality of electromagnetic poles, each electromagnetic pole including a winding, substantially all of the flux of at least one magnetic pole being derived from the permanent magnet, the flux of at least one of the remaining magnetic poles being derived from the windings of the electromagnetic poles, the permanent magnet of the permanent magnetic pole being physically remote from each of the windings of the electromagnetic poles.
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31. A hybrid alternator comprising:
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a stator; and a rotor mounted for rotation within the stator and separated therefrom by an air gap, said rotor having a rotor core having a plurality of rotor field poles that define a rotor perimeter, each rotor field pole defining a corresponding magnetic pole, adjacent ones of the magnetic poles having alternating north and south magnetic fields, the magnetic poles being consecutively arranged in a direction that is circumferential of the rotor core, at least one of the magnetic poles being a permanent magnetic pole comprising a permanent magnet that is positioned within the rotor perimeter and associated with a pair of adjacent rotor field poles to form adjacent permanent magnet poles, the remaining magnetic poles comprising a plurality of electromagnetic poles, each electromagnetic pole including a winding, at least two of the magnetic poles having a flux derived from the permanent magnet and the winding of an adjacent magnetic pole, substantially all of the flux of each remaining magnetic pole being derived from the windings of the electromagnetic poles, the permanent magnetic of the permanent magnetic pole being physically remote from each of the windings of the electromagnetic poles.
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Specification