摘要:
Objects of the present invention are to provide a highly mass-producible heat sink ensuring excellent cooling performance, and to provide an automotive alternator capable of stable running by suppressing temperature increases in diodes of a rectifier and in a stator. The heat sink is a die cast provided with a flat base 41 having a generally rectangular planar shape, one surface thereof constituting a surface for mounting heat-generating components, and a plurality of fins 42 disposed on the other surface of the base 41 at a pitch (P) in the longitudinal direction of the base, each rising perpendicularly from the other surface of the base and projecting in the longitudinal direction of the base, the projecting height (H) of the fins from the base being five or more times the thickness (T) of the fins. The plurality of fins 42 are formed such that the thickness (T), height (H), and pitch (P) of the fins satisfy the expressions T≦1 mm and 0.35≦T/P≦0.6.
摘要翻译:本发明的目的是提供一种高质量生产的散热器,确保优异的冷却性能,并且通过抑制整流器和定子中的二极管的温度升高来提供能够稳定运行的汽车交流发电机。散热器是模具 铸造设置有具有大致矩形平面形状的平坦基部41,其一个表面构成用于安装发热部件的表面,以及多个翅片42,其在基部41的另一个表面上以间距(P)设置在 基部的纵向方向各自垂直于基部的另一个表面并沿着基部的纵向方向突出,来自基部的翅片的突出高度(H)高于基座的厚度(T)的五倍或更多倍 翅片。 多个翅片42形成为使得散热片的厚度(T),高度(H)和间距(P)满足表达式T <= 1mm和0.35 <= T / P <= 0.6。
摘要:
A plurality of strips formed with tooth portions and core back portions is punched from a single band of sheet steel. Next, a plurality of strips is stacked such that the tooth portions line up together and the core back portions line up together and the stacked plurality of strips is integrated to form a strip lamination. Then, the strip lamination is wound spirally and the wound strip lamination is integrated to obtain a stator core.
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:
The invention provides a stator for a dynamo-electric machine capable of preventing deterioration of efficiency. In the stator for dynamo-electric machine of which rotor is disposed inside the stator, a stator core 11 comprises: an inside ring core 9 formed annularly by laminating plate-type magnetic members in which a plurality of teeth are provided on one side of a yoke portion, disposing coils 8 in slots each formed between the teeth, bending the plate-type magnetic members so that the coils 8 are located inside, and bringing two end faces into contact with each other; and an outside ring core 10, being made of magnetic members and formed cylindrical in shape, which is fitted on outside of the inside ring 9 and holds the inside ring core 9.
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 portions of a field rotor in an axial direction, and enabling high-speed and low-speed electromagnetic noise to be reduced by prescribing dimensional relationships in the stator and 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 (Lc/Lp) between an axial length Lc of the laminated core and an axial length Lp of the Lundell-type core is set to a range from 0.55 to 0.70.
摘要:
In a connection portion of a stator winding, conductor wires extending outward from a slot pair separated by a predetermined number of slots are joined such that end portions of conductor wires extending outward from addresses of the slot pair separated by three or more addresses are joined together (a distant-address joint portion), and end portions of conductor wires in the slot pair separated by two or less addresses are joined together (a near-address joint portion). The distant-address joint portion is offset in a circumferential direction relative to the near-address joint portion.
摘要:
An alternator includes a rotor and a stator having a stator core surrounding the rotor, and a polyphase stator winding installed in the stator core, the stator core being provided with an abutting portion extending axially making the stator core into an annular shape by abutting end portions of the stator core, the polyphase stator winding comprising a number of winding portions in which long strands of wire are wound so as to alternately occupy an inner layer and an outer layer in a slot depth direction within slots at intervals of a predetermined number of slots, the strands of wire folding back outside the slots at axial end surfaces of the stator core, and an insulating member being interposed between the stator core and straight portions of the strands of wire in the winding.
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 and a pair of first and second annular flange portions projecting perpendicularly from both ends of the cylindrical portion, and a field winding wound a predetermined number of turns into multiple layers on the cylindrical portion of the bobbin, wherein the field winding has a flat shape in which a pair of opposite flat surfaces are parallel, the field winding being wound onto the cylindrical portion of the bobbin such that the pair of opposite flat surfaces face the inner circumferential side and the outer circumferential side, respectively, relative to the radial direction.
摘要:
Slots are formed in a stator core at a ratio of two per phase per pole and winding phase portions constituted by star-shaped winding units are installed in the stator core so as to line up in six layers radially. An a-phase winding phase portion, a b-phase winding phase portion, and a c-phase winding phase portion constituting a first three-phase alternating-current winding constitute three radially-outer layers, and a d-phase winding phase portion, an e-phase winding phase portion, and an f-phase winding phase portion constituting a second three-phase alternating-current winding constitute three radially-inner layers.
摘要:
An outboard bearing is constituted by a multi-row bearing having one inner ring and one outer ring, a plurality of ball tracks disposed axially between the inner ring and the outer ring, and a plurality of balls disposed in each of the ball tracks. A rectifier is disposed in an outboard bracket on an outer circumferential side of an outboard bearing box, and a ventilation aperture is bored through the outboard bracket on an outer circumferential side of the outboard bearing box.