摘要:
A rotor for a dynamo-electric machine permits higher manufacturing efficiency. The rotor is equipped with a plurality of magnetic portions which are provided between adjacent triangular magnetic poles in an orientation that reduces the leakage of the magnetic flux between the aforesaid triangular magnetic poles. The magnetic portion are joined to at least one of a first flange and a second flange.
摘要:
A stator includes a cylindrical stator core and a stator winding composed of a three-phase stator winding portion constructed by connecting three winding phase portions into a three-phase star connection, a neutral point of the stator winding being electrically connected to a rectifier for rectifying alternating-current output, wherein each of strands of wire constituting the three winding phase portions is led out from a coil end group of the stator winding to an outer side to constitute a neutral-point terminal, each of the neutral-point terminals has a flat side surface portion, and a neutral-point joint portion of aid stator winding is constructed by abutting and electrically joining the flat side portions of the neutral-point terminals.
摘要:
An alternator includes a rotor including claw-shaped magnetic poles fitted onto a rotating shaft, and a cooling means disposed on an end surface of the claw-shaped magnetic poles, and a stator including a stator core disposed facing the rotor, the stator core having a plurality of slots, and a stator winding installed in the stator core, the stator being cooled by the cooling means, and a bracket for supporting the rotor and the stator, a passage for an air flow generated by the cooling means being disposed inside the bracket, the stator winding including coil ends extending outwards from end surfaces of the stator core, and a shielding material being disposed so as to cover at least an inner circumferential surface of the coil ends.
摘要:
The present invention is to obtain a vehicle alternator capable of effectively reducing an electromagnetic noise. The vehicle alternator includes steel sheet fans mounted to poles by being welding to the end surfaces of the poles on the inner peripheral sides of the fans at a plurality of positions in a peripheral direction and a bobbin around which a coil is wound and which is attached in the poles and further includes elastic matters interposed between the fans and the poles on the outer peripheral side of the welding portions where the fans are welded to the poles.
摘要:
In an automotive alternator having a case in which air intake vents 1a and air discharge vents 1b are disposed, a rotor, which is fastened to a shaft such that claw-shaped magnetic poles intermesh, has as a pair of fans having a plurality of blades and fastened to the axial end surfaces of poles cores, and is rotatably disposed in the case, a stator core to which a plurality of slots are formed and a stator having a stator winding to be accommodated in the slots, the slots are formed in an even number, each of the claw-shaped magnetic poles is formed in an even number, and said blades of the pair of fans are formed in the same odd number, respectively. With this construction, there can be provided a small automotive alternator which has a high output and an excellent cost performance and in which fans generate a low level of noise.
摘要:
A thin metal sheet is laminated to form in advance a plurality of core units (of a circular cylinder shape) having the thickness of 1/N (N is a natural number of more than 2) of a predetermined thickness in the laminating direction and this plurality of core units is laminated again for securing so that the whole stator does not cause any mode of oscillation in the diametric direction.
摘要:
A rotor structure comprising a rotor coil for generating a magnetic flux, a pole core which covers the rotor coil and consists of a first pole core body and a second pole core body, each having a plurality of claw-like magnetic poles which are mated with each other, magnets provided on both sides of each of the claw-like magnetic pole for suppressing the leakage of a magnetic flux between adjacent claw-like magnetic poles, and reinforcements for holding the magnets in such a manner that the magnets are inclined so that the interval between the magnets becomes larger on the outer side than on the inner side. This rotor structure can reduce centrifugal force applied to the magnets.
摘要:
A rotor for an automotive alternator comprises a cylindrical bobbin fitted over the base portions of a pair of field cores having a cylindrical portion, a pair of first and second annular flange portions projecting perpendicularly from both ends of the cylindrical portion, a recessed groove disposed at an angle to the radial direction in the inner wall of the first flange portion, and an anchor portion disposed on an outer circumferential portion of the first flange portion in close proximity to the outer circumferential end of the recessed groove; and a field winding having a circular cross-section, the starting portion of which is wound around the anchor portion and housed in the recessed groove, then drawn from the inner circumferential end of the recessed groove onto the outer circumferential surface of the cylindrical portion of the bobbin, and additionally wound a predetermined number of turns into multiple layers on the cylindrical portion of the bobbin, at least one portion of the field winding excluding the prewind portion and the postwind portion being formed with a rectangular cross-section.
摘要:
An automotive alternator reduces invalid magnetic fluxes and uncomfortable noises. In the automotive alternator, the number of slots is one per set of stator coils, per phase, and per pole. The stator coils are disposed such that two sets of three-phase coils have a phase difference from each other, and center-to-center intervals of circumferential gaps of adjoining slot openings are set to be nonuniform. Claw-shaped magnetic poles of the rotor are formed such that at least a narrow tooth of teeth formed between the slots of the opposing stator is positioned to overlap two of the claw-shaped magnetic poles that are adjacent in a direction of rotation of the rotor and have opposite polarities.