Abstract: A stator for an electric machine includes a generally cylindrically-shaped stator core having a plurality of circumferentially spaced core slots. A stator winding includes a plurality of phases, each including at least a first filar and a second filar extending circumferentially around the stator core to form a plurality of layers. Each of the filars is a conductor having a plurality of slot segments disposed in the core slots. The slot segments are alternately connected at the first and second ends of the stator core by a plurality of end loop segments that may form a cascaded winding pattern. The plurality of filars of each phase alternating radial positions with one another within at least one end loop segment at discreet locations around the stator core such that the average radial position of the slot segments of the first filar conductors is substantially equal to that of the second filar.

Abstract: An alternator for a motor vehicle includes a current generation device and a rectifier. The current generation device has multiple phase stator windings in which AC currents are generated. The rectifier is connected to the windings of the current generation device. The rectifier includes multiple sets of first and second diodes for the multiple phase windings. At least one of the first and second diodes of each set is a Schottky diode. A voltage clamping device is connected to the rectifier to protect the Schottky diodes from surge reverse voltage.

Abstract: A stator for an electric machine includes a generally cylindrically-shaped stator core having a plurality of circumferentially spaced core slots. A stator winding includes a plurality of phases, each including a plurality of filars, each filar extending circumferentially around the stator core to form a plurality of layers. Each of the filars is a conductor having a plurality of substantially straight segments disposed in the core slots. The straight segments are alternately connected at the first and second ends of the stator core by a plurality of end loop segments. The filars of a particular phase each have an average radial position within the stator core, and are staggered throughout the layers such that a distance between the average radial position of each filar and the average radial position of the other filars is minimized.

Abstract: A stator for an electric machine includes a generally cylindrically-shaped stator core having a plurality of circumferentially spaced core slots. A stator winding includes a plurality of phases, each including at least a first filar and a second filar extending circumferentially around the stator core to form a plurality of layers. Each of the filars is a conductor having a plurality of slot segments disposed in the core slots. The slot segments are alternately connected at the first and second ends of the stator core by a plurality of end loop segments that may form a cascaded winding pattern. The plurality of filars of each phase alternating radial positions with one another within at least one end loop segment at discreet locations around the stator core such that the average radial position of the slot segments of the first filar conductors is substantially equal to that of the second filar.

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.