High power density alternator bobbin
AssigneeVisteon Global Technologies, Inc.
InventorMichael T. York
Life of this patent
Estimating the term…
Abstract
A bobbin for a rotor is of a three-piece construction which allows for greater heat transfer, increased percentage fill, and hence increased power density of the alternator. Preferably, the three-piece assembly includes an injection molded plastic core, and opposing end caps constructed of a laminate material having good tearresistance.
Claims19
A three piece bobbin for a rotor that includes a field coil for generating a magnetic flux and a pair of opposing pole pieces sandwiching the field coil for guiding the magnetic flux, the bobbin being interposed between the field coll and each of the pole pieces to electrically insulate the field coil, the bobbin comprising:
- a hollow cylinder constructed of plastic and having a first end and a second end, the cylinder having a thickness in the range of 0.1 mm to 0.5 mm;
- a separately formed first end cap constructed of laminate and attached to the first end of the cylinder;
- and
- a separately formed second end cap constructed of laminate and attached to the second end of the cylinder.
A three-piece bobbin for a rotor that includes a field coil for generating a magnetic flux and a pair of opposing pole pieces sandwiching the field coil for guiding the magnetic flux, the bobbin being interposed between the field coil and each of the pole pieces to electrically insulate the field coil, the bobbin comprising:
- a pair of end caps constructed from a first material, the pair of end caps including a first end cap and a second end cap;
- a cylindrical core constructed of a second material, the cylindrical core having opposing first and second ends, the first end cap extending from the first end and the second end cap extending from the second end;
- and
- the first material having a greater tear resistance than the second material.
A three-piece bobbin for a rotor that includes a field coil for generating a magnetic flux and a pair of opposing pole pieces sandwiching the field coil for guiding the magnetic flux, the bobbin comprising:
- a hollow cylinder having a first end and a second end;
- a first end cap connected to the first end of the cylinder;
- a second end cap connected to the second end of the cylinder;
- and
- means for connecting the first end cap and the second end cap to the cylinder, the connecting means including a plurality of protrusions at the opposing ends of the cylinder, and a plurality of apertures formed in the first and second end caps, the plurality of apertures positioned to correspond with the plurality of protrusions.
Dependencies are inferred from the claim text.