CN101330239B - AC generator for vehicle - Google Patents

AC generator for vehicle Download PDF

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Publication number
CN101330239B
CN101330239B CN200710126491A CN200710126491A CN101330239B CN 101330239 B CN101330239 B CN 101330239B CN 200710126491 A CN200710126491 A CN 200710126491A CN 200710126491 A CN200710126491 A CN 200710126491A CN 101330239 B CN101330239 B CN 101330239B
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groove
stator
winding
stator winding
core
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CN101330239A (en
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柏原利昭
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Abstract

The invention discloses an alternating-current generator used for vehicles. Grooves are formed on the stator core in a ratio of 2 per pole per phase. The stator winding is formed by a first three-phase stator winding and a second three-phase stator winding, which are wound around the stator core at an electrical angle of 30 DEG to 34 DEG. Each conducting wire forming the stator winding is provided with a slot accommodating part which is placed in a slot and shaped with a flat cross section. The slot accommodating parts are arranged in a row in the radial direction and placed inside the slot in a laminated manner. The coil ends of the stator winding and the slots are impregnated with the varnish paint.

Description

Vehicle-mounted dlternator
Technical field
The vehicle-mounted dlternator that the present invention relates to utilize the rotation of rotor and in stator, produce alternating voltage.
Background technology
Figure 16 be in the past vehicle-mounted dlternator (below; Abbreviate generator as) longitudinal sectional view; Shown in Figure 17 is the stereogram of the rotor of generator in the past, and shown in Figure 180 is the stereogram of the stator of generator in the past, and Figure 19 is the circuit diagram of generator in the past; Shown in Figure 20 is the stereogram of the stator core of generator in the past, and Figure 21 is the key diagram of the winding construction of the stator winding part of the phase part in the stator of explanation generator in the past.In addition, in Figure 18, omitted the lead-out wire and the neutral line of stator winding.
In Figure 16 to Figure 18, generator has: the casing 3 that is made up of the front end housing 1 and the rear end cap 2 of aluminum; Be arranged in this casing 3 can rotate freely, and the rotating shaft 6 of portion's fast pulley 4 at one end; Be fixed on the blue Dare (Japanese: type rotor 7 ラ Application De Le) in this rotating shaft 6; Be fixed on the cooling fan 5 of the both sides of this rotor 7; Be fixed on the stator 8 of the internal face of casing 3; Be fixed on the other end of rotating shaft 6, to the slip ring 9 of rotor 7 supplying electric currents; Brush 10 with slip ring 9 sliding contacts; Place the brush carrier 11 of this brush 10; The AC rectification that is electrically connected with stator 8, stator 8 is produced is the 1st and the 2nd rectifier 12a and 12b of direct current; The fin 17 of embedding jail on brush carrier 11; And the adjuster 18 adjusted of the size of the alternating voltage that produces with fin 17 bonding, to stator 8.
Rotor 7 has: the excitation winding 13 that flows through electric current, generation magnetic flux; And cover this excitation winding 13, utilize magnetic flux to form the pole core 51 of magnetic pole.Pole core 51 has the 1st pole core body 20 and the 2nd pole core body 21.The 1st pole core body 20 and the 2nd pole core body 21 are made of iron, and the end has claw-type pole 22 and 23.The 1st pole core body 20 and the 2nd pole core body 21 dispose relatively, make claw-type pole 22 and 23 along the circumferential direction engaged, and be fixing with the rotating shaft 6 in its shaft core position break-through.Between adjacent claw-type pole 22 and 23, also become the gap 50 of the cooling channel of cooling excitation winding 13 usefulness, make that magnetic flux does not leak between claw-type pole 22 and 23.
Stator 8 has stator core 15 and stator winding 16.Stator winding 16 has lead is wound on two groups of threephase stator windings in the stator core 15, i.e. the 1st threephase stator winding 52 and the 2nd threephase stator winding 53 with the phase difference of 30 ° of electrical degrees.
Stator core 15 shown in Figure 20 be with stalloy uniformly-spaced being washed into concaveconvex shape and reeling or range upon range of, and constitute toroidal.Stator core 15 by circular rear of core 15a and by this rear of core 15a along the circumferential direction uniformly-spaced and to the T shape 15b unshakable in one's determination that radially inner side extends to constitute.Through like this, groove 15c that forms with rear of core 15a and T shape 15b unshakable in one's determination and the peristome 15d of groove 15c are along the circumferential direction with the equal angles spacing arrangement.
Under the situation of this example; With the stator core 15 of packing into of the 1st threephase stator winding 52 and the 2nd threephase stator winding 53; The number of magnetic poles of rotor 7 is 16 utmost points; About 1 utmost point, there is 2 * three-phase part corresponding, with 96 groove 15c of equal angles spacing formation, peristome 15d and the T shape 15b unshakable in one's determination of 3.75 ° of mechanical angles (being equivalent to 30 ° of electrical degrees).That is, groove 15c with every extremely every be that 2 ratio forms mutually.
The 1st threephase stator winding 52 and the 2nd threephase stator winding 53 have from the both ends of the surface of stator core 15 outstanding respectively front side end winding group 16f and rear side end winding group 16r.Front side and rear side end winding group 16f and 16r are that extension 30a constitutes by a plurality of radiating parts.Extension 30a forms same shape, along the circumferential direction and radially leaves mutually, forms two row's proper alignment.
Below, the winding construction of a phase stator winding portion 56 partly of the 1st and the 2nd threephase stator winding 52 and 53 is described according to Figure 21.In addition; In Figure 21; The lead 30 that has the expression of stain to extend from front end housing 1 side direction rear end cap 2 sides in the circles mark in the groove 15c of stator core 15 has in the circles mark in the groove 15c of stator core 15 * lead 30 that the expression of mark is extended from rear end cap 2 side direction front end housings 1 side.
The stator winding portion 56 of one phase part is made up of the copper lead 30 of outer surface covering paint film respectively.
The 1st threephase stator winding 52 one mutually the stator winding portion 56 of part lead 30 is wound on No. 1 to No. 91 of groove number every at a distance from the groove 15c of 6 grooves in, formation wave winding.The 1st threephase stator winding 52 other two mutually part stator winding portions too, be that lead 30 is wound on No. 3 to No. 93 of groove number, and No. 5 to No. 95 of groove number every at a distance from the groove 15c of 6 grooves in, formation wave winding.Then, in each groove 15c, each lead 30 radially is arranged in a row, and lines up 4 layers.Shown in figure 19, stator winding portion 56 partly is unified into star with the three-phase of processing like this, and constitutes the 1st threephase stator winding 52.
The 2nd threephase stator winding 53 one mutually the stator winding portion 56 of part lead 30 is wound on No. 2 to No. 92 of groove number every at a distance from the groove 15c of 6 grooves in, formation wave winding.The 2nd threephase stator winding 53 other two mutually part stator winding portions 56 too, be that lead 30 is wound on No. 4 to No. 94 of groove number, and No. 6 to No. 96 of groove number every at a distance from the groove 15c of 6 grooves in, formation wave winding.Then, in each groove 15c, each lead 30 radially is arranged in a row, and lines up 4 layers.Shown in figure 19, stator winding portion 56 partly is unified into star with the three-phase of processing like this, and constitutes the 2nd threephase stator winding 53.
The the 1st and the 2nd threephase stator winding 52 and 53 is arranged in the groove 15c with the phase difference of 30 ° of electrical degrees respectively, and is electrically connected with the 1st rectifier 12a and the 2nd rectifier 12b.Then, the direct current output-parallel of the 1st and the 2nd rectifier 12a and 12b connects, and synthesizes.
In the vehicle-mounted dlternator of above-mentioned formation; Pass through brush 10 and 9 pairs of excitation winding 13 supplying electric currents of slip ring from battery (not shown); Produce magnetic flux, make the claw-type pole 22 of the 1st pole core body 20 be magnetized to the N utmost point, make the claw-type pole 23 of the 2nd pole core body 21 be magnetized to the S utmost point.
In addition, utilize engine to make belt pulley 4 rotations, rotor 7 is with rotating shaft 6 rotations.Therefore, produce rotating magnetic field, produce electromotive force for the 1st and the 2nd threephase stator winding 52 and 53.This AC electromotive force is rectified into direct current through the 1st and the 2nd rectifier 12a and 12b, utilizes adjuster 18 its sizes of adjustment simultaneously, to battery charge.
Here, excitation winding 13, stator winding the 16, the 1st and the 2nd rectifier 12a and 12b and adjuster 18 heating all the time in generating.
Therefore; For the heat that produces owing to generating is cooled off; Axial end break-through at front end housing 1 and rear end cap 2 is provided with suction hole 1a and 2a; Radial side break-through at front end housing 1 and rear end cap 2 is provided with steam vent 1b and 2b, makes front side and the rear side end winding group 16f of itself and stator winding 16 and 16r relative.
Through like this; Along with the rotation of rotor 7, rotation drives cooling fan 5, and extraneous air is sucked in the casing 3 from suction hole 1a and 2a; Flow to rotor 7 sides vertically; Then utilize cooling fan 5 to turn, cross front side and rear side end winding group 16f and 16r then towards centrifugal direction, from steam vent 1b and 2b to outside exhaust.In addition, because of the front side of rotor 7 and the pressure differential of rear side, cause that the gap 50 through rotor 7 flows to rear side to cooling air from the front side.
Its result, the heat that stator winding 16 produces from the front side and rear side end winding group 16f and 16r utilize the cooling air heat radiation, the temperature that suppresses stator 8 rises.In addition, the heat that the 1st and the 2nd rectifier 12a and 12b and adjuster 18 produce utilizes the cooling air heat radiation through fin, and the temperature that suppresses the 1st and the 2nd rectifier 12a and 12b and adjuster 18 rises.Have, the Btu utilization that excitation winding 13 produces flows through the cooling air heat radiation in the gap 50 of rotor 7 again, and the temperature that suppresses rotor 7 rises.
In vehicle-mounted dlternator in the past, with every extremely every be that 2 ratio forms groove 15c mutually, the 30 ° of stator cores 15 of packing into of electrical degree phase differences of squinting of the 1st threephase stator winding 52 and the 2nd threephase stator winding 53 take to tackle the measure of output ripple.
But because 30 couples of groove 15c of lead are unfixing, the problem that therefore exists is, because of the vibration of lead 30 causes that lead 30 rub each other, and the perhaps wall friction of lead 30 and groove 15c, insulating protective film damages, the insulation property deterioration.
In addition, because extension 30a is mutual unfixing, the problem that therefore also exists is because of extension 30a friction each other, and to cause that insulating protective film damages, the insulation property deterioration.
Summary of the invention
Problem of the present invention is to solve the above problems, its purpose be to be inhibited stator mechanical oscillation, improve the vehicle-mounted dlternator of insulation property.
The relevant vehicle-mounted dlternator of the present invention possesses: by the rotating shaft casing support, that can rotate; Have and flow through electric current and produce the excitation winding of magnetic flux and have outer circumferential side in this excitation winding and magnetic flux a plurality of and that utilize this excitation winding to produce along the circumferential direction is set carries out the pole core of magnetized claw-type pole and be fixed on the rotor in the above-mentioned rotating shaft; And have along the circumferential direction arrange form a plurality of grooves that extend vertically and above-mentioned rotor is enclosed in suchly embed such be installed on the said stator iron core in the above-mentioned groove that separates regulation groove number respectively by the stator core cylindraceous of said machine casing support and with lead and the stator of the stator winding that constitutes.Above-mentioned groove with every extremely every be that 2 ratio forms on the said stator iron core mutually, the said stator winding is made up of the 1st threephase stator winding and the 2nd threephase stator winding that the phase difference with 30 °~34 ° of electrical degrees is wound on the said stator iron core.Above-mentioned lead have put into above-mentioned groove, be configured as the flat groove placement section in cross section, above-mentioned groove placement section radially is arranged in a row, and in above-mentioned groove, puts into multilayer, again with varnish impregnation in the end winding group and above-mentioned groove of said stator winding.
According to the present invention, radially be arranged in a row owing to be configured as the flat groove placement section in cross section, and in above-mentioned groove, put into multilayer, again varnish impregnation is reached the end winding group of stator winding in groove, therefore improve rigidity as stator, can suppress mechanical oscillation.Therefore, the damage of the wire insulation diaphragm that can suppress to cause because of mechanical oscillation takes place, and improves insulation property.In addition, be very close to each other because the groove placement section is put into groove, therefore try hard to improve copper factor, can realize the generator of high output.
Description of drawings
Shown in Figure 1 is the stereogram of the rotor of the relevant vehicle-mounted dlternator of the present invention.
Fig. 2 is the key diagram that the stator core of the stator of vehicle-mounted dlternator that the present invention is relevant flattens expression.
Shown in Figure 3 is the stereogram of the stator of the relevant vehicle-mounted dlternator of the present invention.
Shown in Figure 4 is the major part end view of the stator of the relevant vehicle-mounted dlternator of the present invention.
A part of cutaway view of the groove laying state of the stator winding of the stator for the relevant vehicle-mounted dlternator of the present invention shown in Figure 5.
The one major part enlarged drawing of the stator winding portion of part mutually of the stator for the relevant vehicle-mounted dlternator of the present invention shown in Figure 6.
Fig. 7 is the circuit diagram of the relevant vehicle-mounted dlternator of the present invention.
Shown in Figure 8 is the variation diagram of 5 component of degree n ns of rotor flux gesture high order harmonic component.
Shown in Figure 9 is the variation diagram of 7 component of degree n ns of rotor flux gesture high order harmonic component.
Shown in Figure 10 is the variation diagram of 11 component of degree n ns of rotor flux gesture high order harmonic component.
Shown in Figure 11 is the variation diagram of 13 component of degree n ns of rotor flux gesture high order harmonic component.
Shown in Figure 12 is the variation diagram of each component of degree n n of stator magnetic flux gesture high order harmonic component.
Shown in Figure 13 is the variation diagram of electro-magnetic exciting force high order harmonic component.
Shown in Figure 14 is electrical degree phase difference, the low speed output of threephase stator winding, the correlation figure of noise level.
Figure 15 is the graph of a relation of electrical degree phase difference and sound of the wind 96 component of degree n ns.
Figure 16 is the longitudinal sectional view of vehicle-mounted dlternator in the past.
Shown in Figure 17 is the stereogram of the rotor of vehicle-mounted dlternator in the past.
Shown in Figure 180 is the stereogram of the stator of vehicle-mounted dlternator in the past.
Figure 19 is the circuit diagram of vehicle-mounted dlternator in the past.
Shown in Figure 20 is the stereogram of the stator core of vehicle-mounted dlternator in the past.
Figure 21 is the key diagram of the winding construction of the stator winding portion of a phase part of the stator of explanation vehicle-mounted dlternator in the past.
Embodiment
Below, with reference to description of drawings example of the present invention.
Shown in Figure 1 is the stereogram of the rotor of the relevant vehicle-mounted dlternator of the present invention; Fig. 2 is the key diagram that the stator core of the stator of vehicle-mounted dlternator that the present invention is relevant flattens expression; Shown in Figure 3 is the stereogram of the stator of the relevant vehicle-mounted dlternator of the present invention; Shown in Figure 4 is the major part end view of the stator of the relevant vehicle-mounted dlternator of the present invention; A part of cutaway view of the groove laying state of the stator winding of the stator for the relevant vehicle-mounted dlternator of the present invention shown in Figure 5; The one major part enlarged drawing of the stator winding portion of part mutually of the stator for the relevant vehicle-mounted dlternator of the present invention shown in Figure 6, Fig. 7 is the circuit diagram of the relevant vehicle-mounted dlternator of the present invention.In addition, in each figure, for Figure 16 to the same or considerable part of vehicle-mounted dlternator in the past shown in Figure 21, additional same label describes.
In Fig. 1, rotor 60 has: the excitation winding 13 that flows through electric current, generation magnetic flux; And cover this excitation winding 13, utilize magnetic flux to form the pole core 51 of magnetic pole.Pole core 51 has the 1st pole core body 20 and the 2nd pole core body 21.The 1st pole core body 20 and the 2nd pole core body 21 are made of iron, and the end has claw-type pole 22 and 23.The 1st pole core body 20 and the 2nd pole core body 21 dispose relatively, make claw-type pole 22 and 23 along the circumferential direction engaged, and be fixing with the rotating shaft 6 in its shaft core position break-through.Between adjacent claw-type pole 22 and 23, also become the gap 50 of the cooling channel of cooling excitation winding 13 usefulness, make that magnetic flux does not leak between claw-type pole 22 and 23.Claw-type pole 22 and 23 roots in the side surface part in the place ahead of direction of rotation form chamfered section 59.
In Fig. 2 to Fig. 6, stator 61 is made up of stator core 62 cylindraceous and the stator winding 63 that is wound in the stator core 62.This stator 61 by front end housing 1 and rear end cap 2 clamp, the embedding jail, make the uniform air gap of formation between the inner peripheral surface of the outer peripheral face of claw-type pole 22 and 23 and stator core 62.
Below, specify the structure of stator 61.
Stator core 62 is identical with stator core 15, is stalloy is washed into the interval of regulation that concaveconvex shape is reeled or range upon range of, and constitutes toroidal.Stator core 62 constitutes to T shape 62b unshakable in one's determination and the 62c that radially inner side extends by circular rear of core 62a and by this rear of core 62a.T shape 62b unshakable in one's determination and 62c along the circumferential direction are arranged alternately.Utilize rear of core 62a and T shape 62b unshakable in one's determination and 62c to form groove 62d.Through changing the circumferencial direction width of adjacent T shape 62b unshakable in one's determination and 62c, the circumferencial direction center of passing through peristome O1 and O2 of groove 62d, the radially interval change of the center line A of extension.Here, in stator core 62, the groove 62d that is spaced apart 4.06 ° of mechanical angles of center line A as a pair of, is formed 48 pairs with the equal angles spacing of 7.5 ° of mechanical angles.And the interval of the center line A of O1 of adjacent apertures portion and O2 alternately is taken as 3.44 ° of 4.06 ° of mechanical angles and mechanical angles.
As shown in Figure 7, with two groups of threephase stator windings, promptly the 1st threephase stator winding 64 and the 2nd threephase stator winding 65 be with the stator core 62 of packing into of the phase difference of 32.5 ° of electrical degrees.The number of magnetic poles of rotor 60 is 16 utmost points, about 1 utmost point, has 2 * three-phase part corresponding.That is, groove 62d with every extremely every be that 2 ratio forms mutually.
Lead 31 is wound on every in wave shape in the groove 62d of 6 grooves; Stator winding portion 66 every three-phases of the six phase part that forms are so partly carried out the star connection; Form two threephase stator windings, stator winding 63 is by these two threephase stator windings, promptly the 1st threephase stator winding 64 and the 2nd threephase stator winding 65 constitute.
Each stator winding portion 66 constitutes the wave winding with lead 31 coiling regulation circles; Formation is by 16 groove placement section 66a that arrange with 6 separation, and the distributed wave winding that constitutes of connecting portion 66b; This connecting portion 66b alternately connects the half the end of adjacent groove placement section 66a in axial both sides each other, and the half the end that will be left alternately connects in axial both sides each other.
Stator winding portion 66 is placed on groove placement section 66a respectively among the groove 62d that arranges with 6 separation, is wound in the stator core 62.Then, the distance (1P) of 6 stator winding portions 66 mutual 1 grooves that along the circumferential direction staggers, is wound in the stator core 62 by radially overlapping 6 layers.The connecting portion 66b of 6 stator winding portions 66 constitutes front side and the rear side end winding group 63f and the 63r of stator winding 63.
Lead 31 is the leads that constitute with the copper wires that lacquer waits insulation to cover, and the position that is equivalent to the groove placement section 66a of stator winding portion 66 is configured as flat cross section, for example square-section, and the position that is equivalent to connecting portion 66b is configured as circular cross-section.Have, as shown in Figure 6, the groove placement section 66a of lead 31 and the boundary portion of connecting portion 66b are deformed into flat cross section again, constitute channel opening through the 66c of portion.This channel opening has the identical radial thickness with groove placement section 66a through the 66c of portion, and forms peristome O1 and the short circumferencial direction length of O2 than groove 62d.
Then, as shown in Figure 5, groove placement section 66a makes the long axis direction of flat cross section consistent with circumferencial direction in the groove 62d of insulator 32 is housed, and radially is arranged in a row, and places 6 layers.Then, with peristome O1 and the O2 of voussoir 34 embedded groove 62d, groove placement section 66a is pressed the bottom surface side of indent 62d.Through like this, groove placement section 66a abuts against each other, and outermost groove placement section 66a is adjacent to through the bottom surface of insulator 32 with groove 62d.With in the varnish 33 dipping tank 62d, that stator core 62 is fixing with stator winding 63 again.Again varnish 33 is immersed in front side and the rear side end winding group 63f and the 63r of stator winding 63, the connecting portion 66b that constitutes front side and rear side end winding group 63f and 63r is fixing each other.
The vehicle-mounted dlternator that the present invention is relevant except using rotor 60 and stator 61 replaces rotor 7 and stator 8 this point, constitutes with in the past vehicle-mounted dlternator equally.
According to this example, the groove placement section 66a that puts into groove 62d of lead 31 forms flat cross section.Then, the flat groove placement section 66a in cross section radially is arranged in a row, and puts into groove 62d.Therefore, can improve copper factor, improve the output of generator.Have again since groove placement section 66a to put into groove 62d be very close to each other, the lead 31 that therefore can suppress to cause and the friction of the wall of groove 62d because of mechanical oscillation, the damage that suppresses the insulating protective film of lead 31 takes place.
In addition; Utilize varnish 33 fixing each other owing to constitute the connecting portion 66b of front side and rear side end winding group 63f and 63r; Therefore can not rub each other because of mechanical oscillation cause connecting portion 66b, inhibition causes the deterioration of insulation property because of the damage of the insulating protective film of connecting portion 66b.
In addition, the groove placement section 66a that the cross section is flat radially is arranged in a row, and puts into groove 62d, in varnish 33 dipping tank 62d.Again with varnish 33 dipping front sides and rear side end winding group 63f and 63r.Through like this,, therefore can suppress the generation of electromagnetic sound owing to improve rigidity as stator 61.
In the connecting portion 66b of all sides utilize cooling fan 5 to cool off easily, and the connecting portion 66b of outer circumferential side is not easy to utilize cooling fan 5 to cool off.But, because groove placement section 66a abuts against each other, therefore between groove placement section 66a, conduct heat easily, make the temperature of groove placement section 66a even.Through like this, can suppress stator winding 63 and produce local excess temperature rising.
In addition, owing to outermost groove placement section 66a is adjacent to through the bottom surface of insulator 32 with groove 62d, so the heat of stator winding 63 can suppress the excessive temperature rising of stator winding 63 efficiently to stator core 62 heat transfers.
In addition; Because the boundary member at groove placement section 66a and connecting portion 66b forms channel opening through the 66c of portion; Therefore with 66 pairs of stator cores 62 of stator winding portion during from axial installation; Channel opening moves at peristome O1 and the O2 of groove 62d through the 66c of portion vertically, and 66a draws in the groove 62d with the groove placement section.Therefore, can improve the installation capability of 63 pairs of stator cores 62 of stator winding, when stator winding portion 66 is installed in stator core 62, can avoid lead 31 to contact with stator core 62 simultaneously, the insulating protective film that can suppress lead 31 damages.
In addition, constitute, so the connecting portion 66b (end winding group) that stretches out from groove 62d of each stator winding portion 66 along the circumferential direction respectively distributes half the in both sides owing to constitute each phase stator winding portion 66 usefulness distributed winding of stator winding 63.Therefore, because the wire harness of connecting portion 66b attenuates, make that interfering with each other the caused bending stress that acts on connecting portion 66b because of the wire harness of connecting portion 66b is radially overlapping reduces.Through like this, even bending stress concentrates on the boundary portion of groove placement section 66a and connecting portion 66b, the insulating protective film of this boundary portion also is not easy damage, can suppress lead 31 accident that is short-circuited each other.In addition, because the overlapping dispersion in a circumferential direction radially of the wire harness of connecting portion 66b, so the concavo-convex minimizing of the internal face of front side and rear side end winding group 63f and 63r.Through like this, can reduce the wind noise that causes generation because of the pressure oscillation between front side and rear side end winding group 63f and 63r and rotor 7 or front side and rear side end winding group 63f and 63r and the cooling fan 5.
In addition, because each claw-type pole 22 forms chamfered section 59 with 23 roots in the side surface part in the place ahead of direction of rotation, so the pressure oscillation of the air gap between rotor 60 and the stator 61 is little, and the number of revolutions that can reduce the sound of the wind of generation here is than 96 component of degree n ns.
Below, discuss about α ° of the electrical degree phase difference of the 1st threephase stator winding 64 and the 2nd threephase stator winding 65.In stator core 62, with every extremely every be that 2 ratio forms groove 62d mutually.That is because the number of magnetic poles of rotor 60 is 16 utmost points, therefore with center line A be spaced apart electrical degree α ° groove 62d as a pair of, form 48 pairs with the equal angles spacing of 60 ° of electrical degrees.And, through changing the circumferencial direction width of T shape 62b unshakable in one's determination and 62c, can set the interval (electrical degree α °) of center line A arbitrarily.In addition, establish groove number No. 1 groove 62d and No. 2 groove 62d be spaced apart electrical degree α °, establish groove number No. 2 groove 62d and No. 3 groove 62d be spaced apart electrical degree (60-α °).
Then, with being wound on No. 1, No. 7, No. 13 of groove number ... Stator winding portion 66 in No. 91 the groove 62d; Be wound on No. 3, No. 9, No. 15 of groove number ... Stator winding portion 66 in No. 93 the groove 62d; And be wound on No. 5, No. 11, No. 17 of groove number ... Stator winding portion 66 in No. 95 the groove 62d carries out star and connects, and processes the 1st threephase stator winding 64.
Equally, with being wound on No. 2, No. 8, No. 14 of groove number ... Stator winding portion 66 in No. 92 the groove 62d; Be wound on No. 4, No. 10, No. 16 of groove number ... Stator winding portion 66 in No. 94 the groove 62d; And be wound on No. 6, No. 12, No. 18 of groove number ... Stator winding portion 66 in No. 96 the groove 62d carries out star and connects, and processes the 2nd threephase stator winding 65.
The the 1st and the 2nd threephase stator winding of processing like this 64 and 65 lead-out wire and neutral point N are as shown in Figure 7, are electrically connected with the 1st rectifier 12a and the 2nd rectifier 12b.Then, the direct current output-parallel of the 1st and the 2nd rectifier 12a and 12b connects, and synthesizes.Here, the phase difference of the 1st threephase stator winding 64 and the 2nd threephase stator winding 65 becomes electrical degree α °.Mechanical angle is equivalent to 32.5 ° of electrical degrees for 4.06 °.
Here; When generating; Between rotor 60 and stator 61, because the interaction of the rotating magnetic field that comprises high order harmonic component that produces from the claw-type pole 22 of rotor 60 and 23, the AC magnetic field that comprises high order harmonic component that produces with the alternating current that from stator winding 63, produces produces electromagnetic attraction.This electromagnetic attraction becomes the claw-type pole 22 and 23 and the electro-magnetic exciting force of stator core 62 of rotor 60, causes vibration and electromagnetic noise.
Be that the application's inventor has carried out electromagnetic field analysis, analyzes for this electro-magnetic exciting force under the situation of 6 times vehicle-mounted dlternator of number of poles at the groove number of threephase stator winding * 2 parallel connections, stator.
Electromagnetic sound in the vehicle-mounted dlternator is to cause because of 3 times times of per 1 number of poles that changes and 6 times times electro-magnetic exciting forces.That is, when the fundamental frequency of establishing output current is f, because of the electro-magnetic exciting force of 6f frequency, 12f frequency causes.Wherein, the electro-magnetic exciting force of 6f frequency is because following interactional former thereby generation.
(a) 5 high order harmonic components in space of the magnetomotive force high order harmonic component of rotor, with the interaction of 5 high order harmonic components in space of the magnetomotive force high order harmonic component of stator
(b) 7 high order harmonic components in space of the magnetomotive force high order harmonic component of rotor, with the interaction of 7 high order harmonic components in space of the magnetomotive force high order harmonic component of stator
(c) space 5 times of the magnetomotive force high order harmonic component of rotor and 7 high order harmonic components, with the interaction of 6 high order harmonic components in space of stator slot high order harmonic component
In addition, the electro-magnetic exciting force of 12f frequency is because following interactional former thereby generation.
(d) 11 high order harmonic components in space of the magnetomotive force high order harmonic component of rotor, with the interaction of 11 high order harmonic components in space of the magnetomotive force high order harmonic component of stator
(e) 13 high order harmonic components in space of the magnetomotive force high order harmonic component of rotor, with the interaction of 13 high order harmonic components in space of the magnetomotive force high order harmonic component of stator
(f) space 11 times of the magnetomotive force high order harmonic component of rotor and 13 high order harmonic components, with the interaction of 12 high order harmonic components in space of stator slot high order harmonic component
In the magnetomotive force high order harmonic component of above-mentioned rotor, be 246 ° of electrical degrees in rotor magnetic pole and the distance between two poles stator opposite face in the wideest part, be to calculate under 114 ° the situation in the narrowest part.
5,7,11,13 higher harmonic components in space and the phase place thereof that depend on distance between two poles become the waveform that peak value, phase place anti-phase are whenever arranged at a distance from 360 °/number of times shown in Fig. 8~11.
If it is integrated to till 114 °~246 °, then try to achieve total high order harmonic component.But this high order harmonic component supposition is a sine wave shape, calculates its temporal phase place.Table 1 is depicted as its result.
Table 1 rotor flux gesture high order harmonic component
Size (relative value) Phase place
5 high order harmonic components 0.105 357.5°
7 high order harmonic components 0.106 356.5°
11 high order harmonic components 0.0092 174.5°
13 high order harmonic components 0.042 353.5°
In addition, in stator magnetic flux gesture high order harmonic component, therefore the phase place of each phase current calculates stator magnetic flux gesture high order harmonic component if change the spacing of channel opening portion owing to copy channel opening portion spacing, then produces high order harmonic component shown in Figure 12.
Because the direction of stator magnetic flux gesture high order harmonic component and the direction of rotor flux gesture high order harmonic component are in the relation of counter-rotating, therefore 5 times each other, to reach 7 times be neutral wave each other.But, depend on different situations, because 6 electromagnetic forces that form each other for 5 times sometimes and 6 electro-magnetic exciting forces that form each other for 7 times are offset, therefore be necessary to consider the mutual addition of phase place.
Shown in Figure 13ly be 6 electro-magnetic exciting forces that can calculate according to this result and the relative value of 12 electro-magnetic exciting forces.
According to this Figure 13, minimum about 6 electro-magnetic exciting forces with equidistant 30 ° exciting force, if constantly increase spacing, then proportional increase.In addition, maximum about 12 electro-magnetic exciting forces with equidistant 30 ° exciting force, if constantly increase spacing, then inversely proportional reducing.And can know that the joining of electro-magnetic exciting force is about 31 °.
Thereby, the phase difference (electrical degree α °) of threephase stator winding is departed from 30 ° a little, though then strengthen electro-magnetic exciting force 6 times, reduce 12 electro-magnetic exciting forces of the reason that becomes uncomfortable high order harmonic component sound.
Below; Be sound of the wind 96 component of degree n ns of 16 rotor 7 generator speed 5000rpm with regard to the number of magnetic poles of this example, will be shown in Table 2 for the value of main number of times component when utilizing discrete Fourier transform calculated rate characteristic of the scope of the channel opening portion mechanical angle that is equivalent to 30~36 ° electrical degree phase difference (3.75 °-3.75 °)~(4.5 °-3.0 °).Can know by table 2,, depart from 30 ° a little through phase difference (electrical degree α °) with the threephase stator winding about sound of the wind, then the 12f component, be that the number of revolutions of generator reduces than 96 component of degree n ns.
Table 2
Figure 15 will be equivalent to become the general regions rotation frequency domain of problem for the race of engine in the scope of 30~36 ° of electrical degree phase differences the value of sound of the wind 96 component of degree n ns is drawn as the figure of curve.Can be known that by Figure 15 sound of the wind 96 component of degree n ns are owing to be separated into other number of times component, therefore the phase difference along with peak value increases, and reduces equally spaced 30 ° of electrical degree phase differences simultaneously.
On the other hand; For the spacing that makes channel opening portion unequal; And the narrower T shape of the T shape iron core and the width that alternately form wider width is unshakable in one's determination, and it is extremely unequal that spacing is formed, under these circumstances; In the narrower T shape iron core of width, produce magnetic saturation, flow to the narrower T shape of width magnetic flux unshakable in one's determination from claw-type pole and reduce.Particularly, the rotating speed at rotor 60 is that output reduces under the such low speed rotation of 2000rpm (during the idle running running).In addition, under the situation of three phase connection full-wave rectifications, when the phase difference of 30 ° of electrical degrees, the output balance of the 1st threephase stator winding and the 2nd threephase stator winding, output ripple also reduces, and according to this situation, phase place departs from more, and output ripple worsens more.
Graph of a relation when Figure 14 uses the vehicle-mounted dlternator of 100A grade, the correlation of noise level when obtaining the output of electrical degree phase difference, low speed and the generating of the 1st threephase stator winding and the 2nd threephase stator winding through experiment for the application inventor.
Can be known that by this Figure 14 in the electrical degree phase difference of threephase stator winding was 31 °~34 ° scope, noise level was low, low speed output is high in addition.And, if according to the foozle of the groove of stator, then median promptly 32.5 ° be the best.
Like this, in this vehicle-mounted dlternator, export in order to improve low speed, and suppress output ripple, effectively way is to make the electrical degree phase difference of the 1st threephase stator winding 64 and the 2nd threephase stator winding 65 near 30 °.In addition, if the electrical degree phase difference of establishing the 1st threephase stator winding 64 and the 2nd threephase stator winding 65 is 30 °, 6 higher harmonic components of the 6f frequency in the time of then can reducing the fundamental frequency of establishing output current and be f.
In addition, depart from 30 °, then can reduce the electro-magnetic exciting force of very uncomfortable 12f acoustically, reduce the electromagnetic noise of number of revolutions than 96 times through the electrical degree phase difference that makes the 1st threephase stator winding 64 and the 2nd threephase stator winding 65.And; According to Figure 14; In order to reduce noise level, and improve low speed output, hope that electrical degree phase difference with the 1st threephase stator winding 64 and the 2nd threephase stator winding 65 is made as in 31 °~34 ° the scope; If consider the foozle of stator, then more hope the electrical degree phase difference is made as 32.5 °.
In addition, depart from 30 ° (unequal spacings) through the electrical degree phase difference that makes the 1st threephase stator winding 64 and the 2nd threephase stator winding 65, the edge part width along the circumferential direction of the leading section of then adjacent T shape 62b unshakable in one's determination and 62c is inhomogeneous.Through like this, the pressure oscillation of the air gap between stator 61 and the rotor 60 disperses, and the number of revolutions of the sound of the wind that here produces also can reduce than 96 component of degree n ns.Thereby, because the mutual interference mutually between 96 component of degree n ns of electromagnetic noise and sound of the wind also reduces, therefore can reduce the noise level that generator produces, suppress the noise of feeling as the personnel of riding.But greater than 34 °, though then the The noise degree is reduced, because other number of times component is excessive, so noise level has the tendency of deterioration as if the electrical degree phase difference.
In addition; Because the neutral point N separately of the 1st threephase stator winding 64 and the 2nd threephase stator winding 65 is electrically connected with the 1st and the 2nd rectifier 12a and 12b respectively, therefore when the generator high speed rotating, can take out output from neutral point voltage; Can not make noise penalty, and improve output.
In addition; Because the 1st rectifier 12a is electrically connected with the 1st threephase stator winding 64, the 2nd rectifier 12b is electrically connected with the 2nd threephase stator winding 65, and after rectification that they are synthetic; Therefore for separately threephase stator winding 64 and 65 not influence of output, can stablize output.In addition, surpass under the such situation of allowable temperature at the synthetic diode temperature that then constitutes rectifier greatly, with a rectifier of exporting, effective especially.
In addition, in above-mentioned example, be that the root in the side surface part in the place ahead of direction of rotation is provided with chamfered section 59, but also can be provided with at the rear of direction of rotation.In this case, because the magnetic flux distribution in the air gap is even, from the approaching desirable sine wave of the magnetic flux of excitation winding 13 generations, so the magnetic flux increase, low speed output improves.
In addition; In above-mentioned example; Be for groove add up to 96,16 the vehicle-mounted dlternator of ading up to of claw-type pole is illustrated, but also can be applicable to certainly groove for example add up to 72, claw-type pole add up to 12 or groove add up to 120, claw-type pole add up to 20 vehicle-mounted dlternator.
In addition, in above-mentioned example, winding is to constitute with the lead of continuous lines 31, but a plurality of conductor segment that also can connect so-called U word shape respectively constitute winding.
In addition, in above-mentioned example, excitation winding 13 is included in the rotor 60, thereby but also can be applicable to excitation winding is fixed on the casing, and through air gap the pole core of rotor is supplied with such alternating current generator that magnetic flux forms magnetic pole.In addition, the present invention not only is defined in vehicle-mounted dlternator certainly.

Claims (2)

1. vehicle-mounted dlternator is characterized in that possessing:
By the rotating shaft casing support, that can rotate;
Have and flow through electric current and produce the excitation winding of magnetic flux and have outer circumferential side in this excitation winding and magnetic flux a plurality of and that utilize this excitation winding to produce is set along Zhou Fangxiang carries out the pole core of magnetized claw-type pole and be fixed on the rotor in the said rotating shaft; And
Have along Zhou Fangxiang arrange to form a plurality of grooves that extend vertically and said rotor is enclosed in suchly embed such install around in said stator core in the said groove that separates regulation groove number respectively by the stator core cylindraceous of said casing support and with lead and the stator of the stator winding that constitutes
Said groove through along the circumferential direction be arranged alternately 2 different T shape iron cores of circumferencial direction width with every extremely every be that 2 ratio forms in said stator core mutually,
Said stator winding is made up of the 1st threephase stator winding and the 2nd threephase stator winding that the phase difference with 31 °~34 ° of electrical degrees installs around in said stator core,
Said lead have put into said groove, be configured as the flat groove placement section in cross section,
Said groove placement section is put into multilayer with radially being arranged in a row in the said groove of insulator is housed,
The mode that the said groove placement section that voussoir will be placed into will in said groove, radially being arranged in a row is pushed the bottom surface side of this groove embeds the peristome of this groove; Thereby this groove placement section that radially is arranged in a row is adjacent to each other; And outermost this groove placement section is adjacent to through the bottom surface of insulator and this groove
Extend from the peristome of said groove at the both ends of interior all sides of said insulator, and extend along interior all sides of the Zhou Fangxiang both sides of said voussoir,
Again with varnish impregnation in the end winding group and said groove of said stator winding.
2. vehicle-mounted dlternator as claimed in claim 1 is characterized in that,
The phase difference of said the 1st threephase stator winding and said the 2nd threephase stator winding is 32.5 ° of electrical degrees.
CN200710126491A 2007-06-19 2007-06-19 AC generator for vehicle Active CN101330239B (en)

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JP2010200596A (en) * 2009-01-28 2010-09-09 Aisin Aw Co Ltd Armature for rotating electrical machine and manufacturing method of same
CN102195370B (en) * 2011-05-18 2013-10-23 哈尔滨工业大学 Permanent magnet generator system with variable leakage reactance and large rotating speed range output
CN102857167B (en) * 2012-09-24 2015-06-17 三一重机有限公司 Method for controlling rotational speed of engine generator
CN103441635A (en) * 2013-09-11 2013-12-11 永济新时速电机电器有限责任公司 Outer rotor electro-magnetic wind power direct drive electric generator

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CN1405949A (en) * 2001-09-17 2003-03-26 三菱电机株式会社 AC. generator stator and producing method thereof
US6713928B2 (en) * 2001-05-28 2004-03-30 Mitsubishi Denki Kabushiki Kaisha Automotive alternator
CN2731816Y (en) * 2004-09-29 2005-10-05 中国北车集团永济电机厂 Horizontally laying armature coil
CN1809951A (en) * 2004-05-28 2006-07-26 三菱电机株式会社 AC generator for vehicle

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Publication number Priority date Publication date Assignee Title
US6424073B1 (en) * 2000-02-29 2002-07-23 Mitsubishi Denki Kabushiki Kaisha Alternator
US6713928B2 (en) * 2001-05-28 2004-03-30 Mitsubishi Denki Kabushiki Kaisha Automotive alternator
CN1405949A (en) * 2001-09-17 2003-03-26 三菱电机株式会社 AC. generator stator and producing method thereof
CN1809951A (en) * 2004-05-28 2006-07-26 三菱电机株式会社 AC generator for vehicle
CN2731816Y (en) * 2004-09-29 2005-10-05 中国北车集团永济电机厂 Horizontally laying armature coil

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