Abstract: In a stator winding of an AC generator for a vehicle, a plurality of sets of first and second conductor segments are disposed in the slots of a stator and connected to form the stator winding. Each of the first conductor segments has a turn portion having a large radius of curvature disposed at an axial end of the stator core, and each of the second conductor segments has a turn portion having a small radius of curvature disposed at an axial end. The second conductor segments have stronger insulation coating than the first conductor segments to improve insulation performance.

Abstract: A stator for a vehicle ac generator includes a stator core having a plurality of slots and a star-connected stator winding. The stator winding has a plurality of sets of U-shaped large and small segments. The large segment has a pair of in-slot portions respectively disposed in the radially outermost slot-layer and radially innermost slot-layer. The small segment has a pair of in-slot portions respectively disposed in the radially outer middle slot-layer and radially inner middle slot-layer. Three output terminal ends respectively extend from the small segments, and three neutral terminal ends respectively extend from the large segments.

Abstract: A stator of an ac generator for vehicle has a stator core which is a lamination of steel sheets and has a plurality of slots cut out in a cutout direction. A plurality of insulators and, subsequently, electric conductors are respectively inserted into the plurality of slots in the direction opposite to the cutout direction. The insulators are prevented from shifting in the slots by sharp-edged burs provided when the plurality of slots are cut out.

Abstract: A stator of a vehicle AC generator includes a stator core having a plurality of slots and a plurality of phase-windings formed of a plurality of conductor members inserted in said plurality of slots. The stator winding has first and second coil-end groups formed of portions of the conductor members respectively extending from the slots to opposite ends of the stator core. Each of the phase-windings has a lead-end which partially covered with an insulation member and extends along the first coil-end group to be connected to one another. The insulation member is bonded to the first coil-end group.

Abstract: In an alternator stator for vehicle, each of the phase-windings includes first and second coil-end groups at opposite axial ends the stator core. Each of the slots includes radially aligned six layers. Each of the phase-windings comprises a plurality of sets of U-shaped segments disposed in a pair of slots separated from each other by a pole-pitch and a plurality of connection segments formed from the U-shaped segments. Each of the sets includes a large segment having a pair of the conductor members disposed in the innermost and the outermost layers, a medium segment having a pair of the conductor members disposed in the layers inside the innermost and the outermost layers to be surrounded by the large segment at the first coil-end group, a small segment having a pair of conductor members respectively disposed in the middle two layers to be surrounded by the medium segment at the first coil-end group.

Abstract: The present invention provides a compact, efficient and noiseless alternator for an automotive vehicle which employs a double-layer coil arrangement in a slot for eliminating coil end interference as well as improving the space factor. An automotive alternator comprises a Lundel-type core rotor with 16 poles, and a stator with toothed portions of 96 poles spaced by slots. U-shaped conductor segments are installed in the slots. One portion of the conductor is accommodated in an outer layer portion of a predetermined slot, while the other portion is accommodated in an inner layer portion of a slot phase shifted by an electric angle of 180°. In this manner, all of the slots are separated into the inner and outer layers to accommodate a plurality of conductor segments. These conductor segments are connected only at one side of the stator to form a total of twelve wavy winding coils.

Abstract: In a stator of an alternator for a vehicle, a stator winding has a plurality of conductor segments having ends extending in opposite directions and a plurality of ball-shaped connected portion between the conductor segments forming continuously connected coils. Each of the ball-shaped connected portions is composed of one end of one conductor segment and the other end of another conductor segment.

Abstract: A stator of a vehicle AC generator including a stator core having a plurality of slots and a stator winding disposed in the slot. The stator winding includes a plurality of conductor segments having an in-slot portion disposed in one of a plurality of radially aligned slot-layers of one of the slots and an inclined coil-end portion extending from the in-slot portion having a connection-end positioned in one of a plurality of circular layers corresponding to the slot layers formed at an end of the stator core. The connection-end in one of the circular layers is connected to another connection-end in adjacent one of the circular layers to form a junction radially and circumferentially spaced apart from other junctions.

Abstract: It is an object of this invention to provide an alternator for a vehicle in which all electric conductors forming bridge portions are sufficiently exposed to cooling winds so that the cooling performance is remarkably improved. It is another object of this invention to provide an alternator for a vehicle which is excellent in cooling performance, insulating characteristic, and heat resisting property. An alternator for a vehicle includes a stator. The stator includes an iron core 22, an electric conductor 21, and an insulator 23. The electric conductor 21 forms a winding on the iron core 22. The insulator 23 provides electric insulation between the electric conductor 21 and the iron core 22. The stator is supported by a housing. The dimension of openings of slots in the iron core 22 is smaller than the distance between inner side surfaces of the slots. The electric conductor 21 has accommodated portions accommodated in the slots, and bridge portions connecting the accommodated portions.

Abstract: The coil-end portions of an armature winding are disposed around cooling fans and closely, and outer coil ends of the coil-end portions are disposed to be close to alternator frames via insulating layers. The coil ends are spaced apart from one another except the base portions, and the resistance of cooling air draft inside the coil-end portions is lower than that around the coil-end portions so that the cooling air mainly passes through the inside of the coil-end portions.

Abstract: In an alternator for a vehicle, a stator winding is composed of a plurality of U-shaped conductor segments and an annular member. The conductor segments have connection edges connected to one another to form ring-connected coil-ends, and the annular member covers the ring-connected coil-ends at the connection edges and portions of the conductor segments adjacent the connection edges. The annular member has a prescribed thickness that provides the ring-connected coil-ends with a prescribed stiffness.

Abstract: In a stator of an ac generator for vehicle, a plurality of insulators are disposed in the slots of the stator to insulate the stator winding from the stator core. Each of the insulators has a smooth edge at one end and a stopper portion at the other end. The stopper portions project from an axial end of the stator core from which conductor segments of the stator winding are inserted. The conductor segments can be inserted into the slots with the smooth edges being at the head and can be easily positioned in the slots by the stopper.

Abstract: In a stator of an alternator for a vehicle including a stator core and a multi-phase stator winding, the stator winding is composed of a plurality of conductor segments having a pair of conductor members connected with one another to form a first coil-end group disposed on one axial end of the stator core so that first U-turn portions of the conductor segments are surrounded by second U-turn portions of the conductor segments and a second coil-end group disposed on the other axial end of said stator core so that ends of said conductor segments are connected to form lap windings.

Abstract: An AC generator for a vehicle including a rotor with a fan, a stator disposed around the outer periphery of the rotor, and a frame. The stator includes a laminated core having a plurality of slots, a plurality of electric conductors in the slots, and an insulator. There is a gap between the electric conductors and the insulator in a diametrical section of the slots, and an area ratio of the gap with respect to the sectional area of the slots is not more than 25%. A portion of the electric conductor positioned within the slot has a substantially rectangular shape along the shape of the slot.

Abstract: An AC generator for vehicles includes a field rotor, a stator disposed around said field rotor and a frame for supporting the rotor and the stator. The stator has a laminated core having a plurality of slots, aluminum conductors housed in the slots, and an electric insulator. The aluminum conductor is constituted by in-slot portion and a crossover portion for connecting an in-slot portion in one slot to another in-slot portion in a different slot to provide a winding as a whole. The frame is provided with a plurality of windows substantially in a whole periphery thereof at portions encircling the crossover portions and substantially in an outer diametrical direction opposite to the crossover portions.

Abstract: It is an object of this invention to provide a compact high-power alternator for a vehicle which is good in cooling performance, efficiency, and cost without decreasing a coil resistance or using a magnet. The alternator for the vehicle includes a stator and a rotor. The rotor includes a Lundel-type iron core and a field coil provided on the Lundel-type iron core. The Lundel-type iron core has a cylindrical portion (71), a yoke portion (72), and a claw-like magnetic pole portion (73). The field coil is provided on the cylindrical portion (71). The yoke portion (72) extends from the cylindrical portion (71) in a radially outward direction. The claw-like magnetic pole portion (72) is connected to the yoke portion (72), and is formed so as to surround the field coil. The stator includes a multiple-layer iron core (32). A ratio of an axial-direction length L1 of the multiple-layer iron core (32) to an axial-direction length L2 of the cylindrical portion (71) of the Lundel-type iron core is in a range of 1.

Abstract: It is an object of this invention to provide a compact high-power alternator for a vehicle. An alternator (1) for a vehicle includes a stator (2) and a rotor (3). The stator (2) serves as an armature. The rotor (3) operates to generate magnetic field. A front cooling fan (12) and a rear cooling fan (13) are fixed to two axial-direction ends of the rotor (3) respectively. The outside diameter (R0) of the cooling fans (12, 13) is equal to the outside diameter (R1) of the rotor (3) which is multiplied by a value of 0.90 to 0.96. The stator (2) includes a stator iron core (32), a stator winding, and an insulator (34) for providing insulation between the stator iron core (32) and the stator winding. Coil end groups (31a, 31b) extend from axial-direction end surfaces of the stator iron core (32) respectively. In the coil end groups (31a, 31b), gaps are formed between portions of the stator winding.

Abstract: An alternator for a vehicle includes a field rotor having a pair of pole cores with a plurality of claw poles, a stator disposed around the rotor, and a frame for supporting the rotor and the stator. The frame has a plurality of air intake windows at axial ends thereof and a plurality of air discharge windows at circumferential portions thereof. The rotor has a cooling fan with a plurality of fan blades disposed at one end of the pair of pole cores. The number of the blades is smaller than the number of the claw poles.