Claw-pole alternator enhancing pole surface
AssigneeVisteon Global Technologies, Inc.
InventorsHanyang Ben Chen, Michael Timothy York
Life of this patent
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Abstract
A rotor assembly for an alternator having a rotor shaft, a field coil wound on an insulative bobbin, and pair of poles mounted on the shaft around the field coil and bobbin. Each of the poles includes a pole core and a plurality of pole fingers. The plurality of pole fingers each have an inner surface facing the field coil. The plurality of pole fingers and their inner surface is structured to increase the electric output power if the alternator while decreasing the weight and volume of the alternator, thereby increasing the alternator maximum speed and reducing the deflection of the pole fingers.
Claims20
A rotor assembly for an alternator comprising:
- a rotor shaft defining a central axis;
- a field coil wound on an insulative bobbin;
- a pair of poles mounted on the shaft around the field coil and bobbin, each of the poles including a pole core and a plurality of pole fingers;
- the plurality of pole fingers each having an inner surface facing the field coil, the inner surface having a first portion disposed at a first angle relative to the central axis and a second portion disposed at a second angle relative to the central axis, the first and second angles being different;
- the field coil extending along the first portion and at least a part of the second portion of the inner surface.
A rotor assembly for an alternator comprising:
- a rotor shaft defining a central axis;
- a field coil wound on an insulative bobbin;
- a pair of poles mounted on the shaft around the field coil and bobbin, each of the poles including a pole core and a plurality of pole fingers;
- and
- the plurality of pole fingers each having a pole root, a pole tip, and an inner surface facing the field coil, the inner surface having a curved shape increasing in slope from the pole root to the pole tip.
Dependencies are inferred from the claim text.