摘要:
A stator winding is formed by inserting two conductor segments each from a first end surface of a stator core into a pair of slots separated by six slots and joining together end portions of the conductor segments extending outward from a second end surface of the stator core, slot-housed portions of the conductor segments being formed with a rectangular cross section and linking portions constituting coil ends being formed with a circular cross section.
摘要:
A stator core is prepared into a cylindrical shape by abutting four arc-shaped laminated core divisions and welding an outer surface and an inner surface of the abutted portions. Each of the laminated core divisions is prepared by bending into an arc shape a rectangular parallelepiped laminated body formed by laminating thin magnetic plates. Second outer plate-joining weld portions are applied at positions dividing the outer surface of the laminated body into three sections, and first inner and outer plate-joining weld portions are applied to the inner surface and the outer surface in the vicinity of end portions of the laminated body.
摘要:
An alternator includes a stator winding in which a plurality of lead wires extending from winding phase groups for each phase are connected in an alternating connection via a terminal assembly for three-phase connection, and the terminal assembly for three-phase connection is disposed at a side of a rotor to which a fan unit is fixed and opposite to the rotor with respect to an end face of the fan unit in the axial direction of the rotor, the terminal assembly opposing the top of a coil-end group of the stator winding.
摘要:
A brush holding apparatus is mounted to an inner wall surface of a rear bracket and a cap mounted to a head portion of a brush holder portion is exposed through an opening in the rear bracket. Brushes are housed inside brush insertion apertures of the brush holder portion and are placed in elastic contact with slip rings by springs. An abrasion detection terminal is insert molded into the brush holder portion, a contact thereof projecting inside one of the brush insertion apertures and coming into contact with the corresponding spring when the brushes are abraded by a predetermined amount.
摘要:
A method of manufacture for a stator core including the steps of a) punching a stacked plurality of long bands of sheet steel to form strip laminations having tooth portions and core back portions; and b) spirally winding the strip laminations and integrating the wound strip laminations. The stacked plurality of long bands of sheet steel can be punched over their width such that at least one pair of the strip laminations is formed and two of the strip laminations form a pair by intermeshing the protrusions and recesses of their respective tooth portions.
摘要:
An object of the present invention is to provide an automotive alternator achieving high output by overlapping a laminated core of a stator and yoke portion of a field rotor in an axial direction, and enabling electromagnetic noise to be reduced by prescribing dimensional relationships in the field rotor. In this automotive alternator, a ratio (R2/R1) between an outer radius R2 of a cylindrical portion of a Lundell-type core and an outer radius R1 of the Lundell-type core is set to a range from 0.50 to 0.54, and a ratio (Tr/Tp) between an axial overlap length Tr between the laminated core of the stator and the yoke portions of the Lundell-type core and an axial length Tp of the yoke portions is set to a range greater than or equal to 0.2.
摘要:
An alternator includes a rear-end fan which is constructed so as to have greater capacity than a front-end fan. The construction is such that a flow rate in a front-end ventilation pathway in which a cooling air flow enters through front-end air intake apertures is deflected centrifugally by the front-end fan and is then expelled through front-end air discharge apertures is greater than a flow rate in a rear-end ventilation pathway in which a cooling air flow enters through rear-end air intake apertures is deflected centrifugally by the rear-end fan and is then expelled through rear-end air discharge apertures.
摘要:
A stator coil has tooth portions and slot portions defied between adjacent tooth portions. Each tooth portion has a rectangular cross-section perpendicular to the axis of the stator core. A group of conductor wires received in each slot portion includes conductor wires of a circular cross-sections and conductor wires having polymorphic cross-sections. The ratio (space factor) of the overall cross-sectional area of the conductor wires accommodated by the slot portion relative to the cross-sectional area of the slot portion is not less than 80%.
摘要:
An alternator includes a rotor for forming north-seeking (N) and south-seeking (S) poles about a rotational circumference, a stator having a stator core disposed facing the rotor and a polyphase stator winding installed in the stator core, and a bracket supporting the rotor and the stator, wherein the stator core includes a laminated iron core formed with a number of slots extending axially at a predetermined pitch in a circumferential direction, the polyphase stator winding includes a number of winding sub-portions in each which a long strand of wire is wound so as to alternately occupy an inner layer and an outer layer in a slot depth direction within the slots at intervals of a predetermined number of slots, the strand of wire folding back outside the slots at axial end surfaces of the stator core to form turn portions, and the turn portions align in a circumferential direction to constitute coil end groups.
摘要:
An alternator includes a rotor for forming north-seeking (N) and south-seeking (S) poles about a rotational circumference, a stator having a stator core disposed facing the rotor and a polyphase stator winding installed in the stator core, and a bracket supporting the rotor and the stator, wherein the stator core comprises a laminated iron core formed with a number of slots extending axially at a predetermined pitch in a circumferential direction, the polyphase stator winding comprises a number of winding sub-portions in each which a long strand of wire is wound so as to alternately occupy an inner layer and an outer layer in a slot depth direction within the slots at intervals of a predetermined number of slots, the strand of wire folding back outside the slots at axial end surfaces of the stator core to form turn portions, the turn portions align in a circumferential direction to constitute coil end groups at both axial end portions of the stator core, and the turn portions constituting the coil end groups at both axial end portions of the stator core are formed in the generally identical shape in a circumferential direction.