| 摘要 |
An alternator rotor assembly comprises two "claw pole" pole pieces (12, 14) and a field coil assembly (28) mounted between the pole pieces for rotation therewith. The field coil assembly comprises a bobbin (30) and a coil of wire (32) wound around the body of the bobbin. The bobbin further comprises two walls (34, 36) extending radially away from the body of the bobbin, between which the coil wire is wound. Projecting from the walls are flaps (38, 40, 42, 44) which extend radially outward. The flaps are designed to be bent over by the pole fingers (16, 18, 20, 22) as the rotor assembly is assembled. When so bent over, the flaps help retain the coil wire (32) on the bobbin and help prevent short-circuiting of the coil wire to the inner radius defined by the pole fingers. The ends of the flaps have notches (50, 52) that assist in selfalignment.
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